DE102018115879A1 - Method and device for contour-like tempering of shell-shaped molds - Google Patents

Abstract

The object of the invention is therefore to create a controlled tempering by applying the tempering agent to all areas of the tempering object, in particular the tempering surface, in a manner which is more appropriate to the needs, whereby a contour-like tempering of shell-shaped molds is made possible in a more individual and targeted manner. Process for close-contour tempering of shell-shaped molds with sub-areas of a tempering surface (2) geometrically delimited by separating-passing elements (3) on at least one rear side of the mold rim (15) of a mold, the sub-areas of the tempering surface (2) individually or as a group individually with at least one fluid temperature control means via at least one distributor head (4), the at least one fluid temperature control means in the form of a single-phase or two-phase temperature control means being uniform and largely thermally unaffected for individual, several or for all sub-areas (2) Forming tool or from the respective sub-area of the tempering surface (2) of the molding tool is generated and fed and passed through the distributor head (4) to the respective sub-area of the tempering surface (2), the state of the at least one fluid tempering agent being removed from the and the temperat Only at the respective partial areas of the temperature control surface (2) and the measurements are transmitted to a regulation (19) or control system (19) .Device for contour-like temperature control of shell-shaped molds with partial areas geometrically delimited by separating-passing elements (3) Temperature control surface (2) on at least one rear side of the mold edge shell (15) of a mold, the partial areas of the temperature control surface (2) with at least one fluid temperature control means by means of at least one geometrically oriented distributor head (4) with at least one outlet opening (18 ) can be acted upon as required, sensors (1, 8) being present at least for measuring the temperature on the partial areas of the temperature control surface (2) and for detecting at least one state of the at least one fluid temperature control medium, the sensors (1, 8 ) are connected to a controller 19 or controller 19.

Description

The invention relates to a device for improving the temperature control of objects, for example the close-contour temperature control of bowl-shaped molds. The temperature of bowl-shaped molds is from the back. For this purpose, the shell-shaped molding tool can be designed such that its rear side largely follows the contour or engraving. The bowl-shaped molding tool is constituted as in W0002017076399A1 described, with polyhedron-like spaces on the tempering surface. This tempering surface is the back of the mold edge shell and allows a two-dimensional and locally different tempering. The entire tempering surface of the mold edge shell is divided into flat partial areas of the tempering surface via these polyhedron-like spaces. Lateral delimitation of the polyhedron-like spaces is achieved using separating-passing elements. Depending on the molding tool, the polyhedron-like rooms or flat sections are also angled, small, have corners and edges. These flat sections are the temperature control objects. Depending on the mold and workpiece, the sub-areas also have internals, for example ejectors. This creates cooling shadows in conventional sprinkling or spraying with a nozzle, in which direct temperature control is difficult. Temperature control by applying the temperature control agent to all areas of the temperature control surface, even in edges, corners and around obstacles, is not possible.

The temperature control system in which the cooling takes place with the present invention is open to pressure to the atmosphere.

The classic cooling via channels in the rear area of the tool and by spraying the engraving of the tool or the classic, almost punctiform cooling of very small circular areas, such as, for example, through bores in the rear area of the tool by means of jet cooling or the like is not the subject of the invention. Furthermore, only the cooling during the molding process itself is considered, i.e. until the point in time at which the shaped workpiece is removed from the tool. The subsequent tempering of the workpiece is not considered.

With the objective of tempering spatial and flat cooling objects or tempering objects, the state of the art is often used to break up liquids. Numerous devices such as rotating mechanical nozzles, single and two-phase atomizers, pressure atomizers and the like have been described for the fine distribution, spraying and atomization of liquids in nozzles, with and without using carrier gas.

Regardless of whether a room or surface is to be cooled, the phase transition of water, i.e. its transition from the liquid to the gas phase or its evaporation, often comes into play when cooling with aqueous two-phase mixtures. The size of the liquid drops is part of the intensity of the cooling. The evaporation of water plays a crucial role in this. By reducing the drop size, a better, because easier evaporation of the water on the cooling object or temperature control object can be achieved. Sprays or mists, i.e. liquid droplets finely distributed in carrier gas, are produced. In it, the liquid drops can have different sizes, which tend to float or settle. However, a large cooling effect of the target object should be achieved with little effort.

In the DE 2249844 A For example, a principle is described, such as how the liquid is released into small droplets of a suitable size by cutting two liquid layers within a nozzle and subsequently exiting the nozzle. The spraying of large quantities of liquid or a high throughput of liquid is tracked. In the DE1279605A a two-component mist nozzle for cooling coiled wire rod, a ring made of wire, is presented. Many mist nozzles are attached to a double pipe for the supply of water and compressed air. Cooling mist with a droplet size of <50 µm is generated by the nozzles. The double pipe is placed inside the wire reel in order to optimally cool the surrounding hot wire with cooling mist.

In DE 299 06 723U1 describes the injection of a preheated cooling mist produced outside the tool into the hot cavities of extruded hollow profiles, the hot inner walls of which are cooled. This is done using a triple-concentric tube, a tube-type tube with an outer, middle and inner tube. The mist generated outside the tool, in a piezo fog device, is placed in the center tube almost without pressure. Compressed air is led through the inner tube into the cavity of the profile and the fog of the middle tube is dragged along. The combination of both pipes is de facto a nozzle. The actual process cooling mixture is created by the arrangement of these two pipe mouths to form a nozzle. The outer of the three tubes is a vacuum tube to remove the cooling mixture after interacting with the cooling target. All three pipe mouths meet at the beginning of the hollow profile. This system therefore represents a kind of triple nozzle with feed and discharge function. It is a process cooling mixture at the beginning of the profile in it Cavity atomized or blown. The location of the generation of the process cooling mixture is therefore synonymous with the location of the application to the target object of the cooling, namely the hollow profile. There, however, it can only act briefly on the inner surfaces of the profile, because the vacuum function of the triple nozzle immediately draws off this cooling mixture. The dwell time of the mist in the profile cavity will have a decisive influence on the cooling. It is disadvantageous that the cooling mixture only flows into the cavity of the profile itself and cannot be directed directly to its surfaces that are actually to be cooled. It is drawn off through the concentric outer tube, so that the cooling effect is limited. There is therefore a non-directional flow of the coolant with rapid return through the outer vacuum line of the triple nozzle. Inner edges are inevitably cooled less than inner surfaces.

In DE 10 2015 105 680 A1 describes a device and distribution with distributor head for coating the inner surfaces of pipes. It consists of a supply device, media line and application device or distribution head. A nozzle can be attached to this application device. If the application device rotates, the entire inner surface of the tube can be coated. However, several nozzles can also be attached to the periphery of the application device, so that the spray cones overlap. Then it does not have to be rotating. The application device can be moved in the direction of the tube axis, so that the entire inner surface can be coated in the axial direction. It is disadvantageous that there can be no installations in the pipe. However, if there were installations between the inner wall of the tube and the application device, spray shadows would inevitably arise behind them and the coating of the inner wall would be incomplete in this area.

In Scripture GB 2163674 a nozzle for producing a fine two-phase spray from liquid drops in carrier gas is presented, which is produced with an air atomizing nozzle. In it, viscous liquid under pressure is forced through a fine nozzle, at the end of which there are two air channels for introducing air. The arrangement of the air channels to the liquid channel and the geometry of the nozzle opening create a fine, uniform two-phase spray in a variable spray cone. In FR 2256790 , as well as similar to that in JP 59130664 , the suitable arrangement of a liquid nozzle and two or more gas nozzles is presented with the aim of atomizing the liquid. In FR 2256790 the atomization is realized in a kind of double pipe. For the atomization of the water, the water in the water-carrying part of the double pipe is passed through a fine bore, and the air in the air-carrying pipe part is passed through two fine bores, the air bores at an angle to the bore for the water such that a crossing of the two air jets and one water jet occurs at a point outside the double pipe. At this point, the liquid is atomized into a spray with a spray cone, which is determined by the angle of the air jets to the water jet. Several such nozzle arrangements can be installed in the double pipe and objects can be cooled in this way.

Conditioning the generation of a spray or mist is included EP 0343 103 B1 described. In a nozzle chassis, liquid is sprayed into a mist in the surrounding gas without the aid of a carrier gas. Assuming a vertical alignment as a reference, the fog emerges in this direction in the form of a fog cone into the surrounding gas phase. Laterally from the point of exit of the mist, two holes are made in the nozzle head device through which air or other gas is passed. Depending on the angle of the holes and gas velocity, the shape and direction of the spray cone change. The change in shape consists in the change in the angle between the cone axis and the cone surface of the spray cone. In this way, more acute and obtuse angles can be set. The direction of the cone is changed with different gas velocities in both gas tubes. Roll profiles are sprayed with a nozzle system of this type by passing them past the nozzle system. The disadvantage is that the emerging, gasified mist is always carried out in the geometry of a spray cone and thus only the shape and direction of a single cone can be varied. The object surfaces of the rolled sections to be cooled must be cooled by several such nozzles, which are oriented differently on the one hand and are modified in their spray cone on the other. Thus, the cones of several nozzles for the cooling task must be aligned in order to be able to cool all surfaces of the geometry, including edges and corners of the object to be cooled.

The prior art of nozzles for two-phase mixtures is the same despite their different design. The place of generation is the nozzle itself. The place of application of the two-phase mixture is arranged in the vicinity of the two-phase nozzle. Once the spray medium has been generated, it is applied to the cooling object or temperature control object very close to where it is generated. Regardless of how the spray is generated, there is no freedom in the choice of the geometry of the nozzle for adapting it to the given temperature control object for the directed application of the spray produced, with one or the same Nozzle to be able to act upon the cooling surfaces of the entire temperature control object as required. If built-ins or superstructures appear on the temperature control object, cooling shadows almost inevitably occur, i.e. areas that are not cooled on the surface to be cooled. Especially when there is a lack of space or space in front of the temperature control object and small, angled cooling surfaces, it is very difficult to evenly align the nozzle to all areas or to apply temperature control agent from a single nozzle to all areas of the temperature control object.

The object of the invention is therefore to create a controlled tempering by applying the tempering agent to all areas of the tempering object, in particular the tempering surface, in a manner which is more appropriate to the needs, whereby a contour-like tempering of shell-shaped molds is made possible in a more individual and targeted manner.

The present invention aims at the better controlled, ie more appropriate tempering of the partial areas of the tempering surface on the back of the mold edge shell, ie the tempering object. The mold edge shell is tempered via the thermal interaction of a temperature control agent with the temperature control surface.

According to need, the optimal application of temperature control means to the temperature control object. This is made possible by the implementation of three features, the defined state of the temperature control agent, the directional application of the temperature control agent to the temperature control object and the defined duration of the application of the temperature control object. The temperature control object for the invention is the temperature control surface of bowl-shaped molds. The mold shell is tempered via this tempering surface. This enables close-contour temperature control of molds.

Directed is further understood to mean that the temperature control agent is intentionally or intentionally or specifically directed or flows onto one or more areas of the temperature control object. The flow is directed when it is applied specifically to the temperature control object. A thermal interaction with all areas of the temperature control object should therefore be made possible via the directed flow. Directed is understood to be a process feature.

In the following, aligned or aligning means that a device for distributing a fluid as temperature control means is specifically adjusted or adjusted geometrically. The flow of the fluid is thereby individually adjusted or adjusted in such a way that targeted or directed flow to all areas of the temperature control object is possible. This device is the distributor head according to the invention for contour-like tempering of shell-shaped molds. The tempering surface on the back of the mold rim is geometrically subdivided by wall-like separating-passing elements, whereby partial areas are formed on the tempering surface. This geometric subdivision creates polyhedron-like spaces on the back of the bowl-shaped mold.

With the present invention, the subareas of the tempering surface and also the lateral separating-passing elements delimiting them can be tempered. This is achieved by means of geometrically aligned and multifunctional distribution heads for the passage of fluid temperature control agents for the temperature control of the temperature control objects. The distribution heads can be geometrically adapted to the spatial areas in front of the tempering surface in the polyhedron-like rooms with their lateral separating-passing elements and to the structures and internals of the tempering surface. The polyhedron-like rooms are almost always different in shape and sometimes very narrow.

Furthermore, the distribution of the temperature control agents can be adapted to the conditions of the objects to be temperature controlled with their internals, as well as corners and edges. The orientation of the distribution head also reacts favorably to the relative position of the temperature control object in comparison to the distribution head, such as overhead, under head and the like.

The disadvantages of the prior art are eliminated by the application of the three characteristics defined state, directed order and defined duration of the application of the temperature control agent in accordance with requirements. The defined heat exchange of the temperature control agent with all areas of the temperature control surface is made possible. These sub-areas include in particular corners, edges and obstacles, such as fittings and superstructures on the temperature control surface. Edges and corners are created when a tempering surface is delimited in some areas by separating-passing elements. When the separating-passing elements hit the tempering surface, there are a large number of edges and corners. Edges are very diverse in their course, since the mold edge shell is contour-related and the tempering surface follows the casting surface and thus the engraving, i.e. represents an uneven surface. Due to the small size and the uneven partial areas of the tempering surfaces in polyhedron-like rooms, as well as the diverse shape of the edges occurring, cooling with conventional nozzles of the prior art is possible Technology problematic. The tempering agent often flows insufficiently into the corners and edges.

To control or regulate the temperature of the temperature control surface, temperature sensors are required on the respective sub-areas of the temperature control surface. If the temperature control surface is not acted upon with temperature control agent as required, then the desired process window of the temperature of the respective partial area is not set by the control or regulation. By means of the distributor head according to the invention and its tubular extensions, the flow of the temperature control means can be locally locally aligned to all areas of the temperature control surface.

On the one hand, fluid coolants or temperature control agents are to be understood as those that are two-phase. This includes, for example, a carrier gas with liquid droplets finely distributed therein, for example water in air. However, single-phase fluid temperature control agents can also be used, such as air, carbon dioxide or water.

If, for example, liquid water is applied to a sub-area of the tempering surface, this means the wetting of this entire surface of the tempering object and also the constant water exchange when the entire area of the sub-area is exposed to a uniform density of water. Straightened means that corners and edges are also exposed to a liquid film. If, for example, edges and corners are not irrigated or acted upon, the heat exchange of the water via the desired heat transfer mechanisms, such as partial or stable film evaporation, would not take place in these non-irrigated or non-wetted areas. The density of water exposure is understood to be the amount of water applied to the surface per unit area and time. The aim of applying liquid temperature control agents as required is to form a uniform liquid film on the temperature control surface. This is achieved with many drops in a drop collective. However, several individual water jets are also possible, which produce a uniform closed liquid film on the temperature control object.

Due to the new geometrically oriented distributor head according to the invention, the object of the temperature control or the target object of the temperature control or the temperature control object is acted upon by a temperature control means which has already been produced or has been previously fed in and or has been conditioned beforehand. In a special case, the temperature control object is a part of the temperature control surface. By means of the distributor head itself, the temperature control means and thus its flow is only directed towards the temperature control object or acted upon in a directed manner. After the production and / or feeding and / or conditioning of the fluid temperature control agent, it must be transported to the distributor head in a stable and largely unaffected manner so that its condition is always known.

By separating the location of the production or the provision of the temperature control agent from the location of the order on the temperature control object, in the special case a partial area of the temperature control surface, additional freedoms are gained for the novel distribution head. These consist of the controlled generation and the possibility of conditioning a two-phase or single-phase temperature control, almost thermally unaffected by the mold, away from the location of the distributor head. The distributor head itself can be located near the temperature control object or the temperature control target. The flow of the temperature control agent is applied to the temperature control object via the distributor head. This means that its design and geometric setting make it possible to act upon the temperature control object in a targeted manner with temperature control agents or to direct the flow towards all areas of the temperature control object. There is also the freedom of the geometric special structure or appearance of the distributor head, since the functionality of a classic nozzle is not absolutely necessary. For example, it is not necessary to generate a two-phase flow with or in the distributor head itself, that is to say, for example, to disperse water in carrier gas, but rather only the temperature control object is to be charged with the two-phase flow already present via the distributor head. As a result, the directional flow of the two-phase coolant is directed into the corners and edges of the temperature control surface, and the flow around structures and internals of the temperature control surfaces takes place in a much more targeted manner. There is also the possibility of simultaneously flowing or tempering lateral surfaces, such as the lateral separating-passing elements of a polyhedron-like space that limit the temperature-regulating surface, in a suitable manner via the distributor head. Furthermore, cooling profiles can be run by changing the cooling intensity depending on the cooling time. Cooling profiles change the cooling intensity as a function of time. The changed cooling intensity is realized by changing the material composition of the temperature control agent and / or by its speed relative to the temperature control object.

Depending on the speed of the flow of the temperature control agent onto the temperature control object, its cooling intensity is adjusted to the temperature control object. If, on the other hand, the speed of the carrier gas is reduced in conventional two-phase nozzles, this inevitably occurs Changes in the spray pattern and also the composition of the two-phase mixture. And if the speed of the carrier gas falls below a certain level, atomization will no longer occur.

Furthermore, narrow polyhedron-like rooms with small temperature control surfaces also require thin, space-saving supply lines for carrier gas and water to a two-phase nozzle, which would have to be positioned directly in front of the temperature control surface. The temperature control surface and also the side separating-passing elements are very hot, especially in casting tools. It should also be noted that there is no cooling in the entire process. In process times when there is no temperature control, the water in the supply lines to the nozzle comes to a standstill. The water in these thin supply lines would quickly become very hot and boil. If the water boils, it can escape from the nozzle in an uncontrolled manner. There would be no control of the condition of the water in the supply lines. As a result, one would not know the condition of the spray or spray when applied to the tempering surface.

Furthermore, the cooling times of these small cooling surfaces are very short and, in the case of sprays or spray mist, also strongly dependent on the proportion of water in the spray or spray mist. Indefinable states of the media in the supply lines to the nozzle prevent the aim of the regulation or control to keep the temperature of temperature control objects in a defined stable process window. There is also the influence of other disturbance variables on the process. This can be countered or counteracted by adjusting the coolant intensity or cooling time of the disturbance variable. If the nozzle were undefined, this would be difficult or impossible. In the state of the art, it is therefore to be criticized that there is currently a possibility of applying the temperature control agent to the temperature control object in a defined or needs-based manner, that is, a defined application of the temperature control agent to the temperature control object with regard to the defined state of the temperature control agent, the directional application and the duration of the application. is missing.

Furthermore, it cannot be ruled out in the prior art that local overheating occurs on the cooling surface due to the short cooling times of mold edge trays. The possibility of flow against the entire surface of the temperature control object applies particularly to areas of the temperature control object with internals and / or superstructures. For nozzles of the prior art, areas from the point of view of the nozzle behind built-in components would form little or no exposure to temperature control agents. An example of such internals is the ejector. It is required in the process for ejecting the solidified workpiece, for example a cast part. For this purpose, a cylindrical rod is guided through the mold edge shell to the engraving. On the tempering surface for the spray cone of a classic nozzle, this rod inevitably provokes areas of low exposure to the tempering agent, because this nozzle is generally only oriented in one direction. From the point of view of the nozzle, spray shadows are created behind the ejector, i.e. places with no or insufficient flow of the temperature control agent onto the temperature control surface. These surfaces cannot be cooled or can only be cooled very poorly with a nozzle of the prior art.

In the present invention, the flow will flow locally directed in different directions through the manifold head. This means that the temperature control agent also flows into areas of the temperature control surface behind the ejector. In addition, the distributor head can be geometrically adapted to the respective internals and superstructures of the respective sub-area of the temperature control surface. Depending on the space required by the built-in and superstructures and generally how the area in front of the temperature control surface is designed, the distributor head is geometrically designed so that it is not in the way or that it is adapted to the area in front of the temperature control surface, or that it is geometrically aligned and the flow through it can be directed to all or the desired locations of the tempering surface. This means that the distributor head can be geometrically adapted to the spatial area in front of the partial area of the temperature control surface and the requirements for temperature control of the temperature control surface.

The starting point of the present invention is the consideration that in the case of small, difficult-to-access temperature control objects, especially partial areas of the temperature control surface, which also have built-in and superstructures and are located in narrow rooms with edges and corners, it is neither possible nor necessary that the place of manufacture or conditioning or feeding of the fluid, as well as the place of delivery of the fluid are identical. These two functions are spatially separated in the present invention. The location of the release of the fluid, such as a gas, sprays, spray mist, a liquid and the like, takes place directly in the tool and there close to the temperature control surface. The location of the production and / or feeding of this temperature control agent and / or the conditioning of the condition should be arranged separately from it. It can also be outside the tool. By separating the two functions, the freedom of separating the place or the places of manufacture and / or feeding and or conditioning is gained from the place where the temperature control agent is released from the temperature control object. The manufacture and / or feed and This means that the temperature control agent is also thermally largely unaffected by the mold. It is only necessary to take precautions for the largely thermally unaffected transport between the two locations, which can be achieved by thermal insulation. This should make it possible to apply the temperature control agent to the entire temperature control object as required. The three characteristics of the need-based application of a temperature control agent are thus implemented in the present invention by the defined manufacture or conditioning and / or feeding of the temperature control agent, the directional application to the temperature control object and the defined duration.

The invention solves the problem by means of a geometrically oriented distribution head for fluids. This is a device in which the temperature control agent is not manufactured or conditioned, but with which it is directed or distributed over the entire temperature control object. The distributor head and the place of manufacture or place of supply and or places of conditioning of the temperature control medium can be spatially separated from one another.

The temperature control agent is manufactured or fed and / or conditioned in a separate mixing container, for example. The material components of two-phase fluid temperature control agents, such as cooling mist or cooling sprays, consisting of carrier gas and finely divided liquid drop phase, can be produced in a wide range of the components to one another in the separate mixing container. The distributor head is connected via the electronic regulation or control of the system and its sensors for determining the temperature of the temperature control object and the devices for determining the state, feeding and conditioning the temperature control medium.

Here, the mixing container is understood as a space that can be designed differently in terms of geometry, such as, for example, as a tank or as a tube, T-piece, Y-piece, three-way valve or the like. A mixing container therefore does not have to be large and is also understood schematically as a mixing point. Such mixing containers or mixing points can also be arranged one after the other, for example to add another fluid to a two-phase temperature control medium.

In the simplest case, a two-phase temperature control agent, for example a cooling mist, with a specific composition of liquid phase and carrier gas, is introduced into a pipeline by means of a two-component nozzle via a T-piece 14 fed. The location of the feed of the two-phase temperature control agent, i.e. the T-piece with the two-component nozzle in the pipe, can be remote from the distributor head. Through this pipeline 14 then the temperature control agent is used as a feed line 13 to the distributor head and / or polyhedron-like space and through this and / or directed into the temperature control object. A deliberate change in the condition of the material can still occur on the way to the distributor head. For example, on the way to the distributor head, another fluid is mixed in via a mixing point or the like. Excess or used tempering agent can be drained off or sucked off from the respective partial area of the tempering surface.

In addition to the adjustment of the material content of the mixture, there are further possibilities for influencing the condition of the temperature control agent with regard to the physical variables pressure, temperature and, in the case of two-phase temperature control agents, also the drop size of a finely divided liquid phase. The speed of the fluid temperature control medium is also understood as the size of the state. Conditioning the tempering agent means influencing its condition until it is ready for use, defined tempering agent. The temperature control agent that can be used therefore has a defined state. Appropriate insulation then transports it to the distributor head largely unaffected by heat. For example, the pipes or hoses or the like required for transport are thermally insulated. Due to the defined state, the temperature control medium flows over the geometrically aligned distribution head towards the entire temperature control object. Defined regulation of the temperature of the temperature control object is only possible through the implementation or consideration of the three characteristics. The distributor head, as well as sensors and regulation or control of the temperature control and the technical units for analyzing and conditioning the condition of the temperature control medium form a communicating system. Technical units for conditioning the temperature control agent are, for example, valves, slides, containers, sensors and the like.

Depending on the molding tool, the entire temperature control surface of a molding tool is divided into several sub-areas delimited by separating-passing elements. Irrespective of this, it may be necessary to have a distributor head for temperature control for each individual section. However, the temperature control of groups of delimited sub-areas is also possible via a distributor head. The temperature of the temperature control medium can be conditioned accordingly for each distribution head. For example, the proportion of water in a spray can be adjusted differently by mixing carrier gas from one distribution head to the next. It is possible to vary its cooling capacity by dynamically changing the proportion of carrier gas in a spray or by changing its speed For example, realize cooling profiles for the given area of the tempering surface. Or in the case of the tempering agent liquid water, the flow velocity of the respective sub-area of the tempering surface can be changed or adapted. This requires communication of the distributor head with the regulation or control via its sensors and devices for changing the state of the temperature control medium.

The sensory measurement for describing the state of the temperature control medium, such as its pressure, speed, composition and temperature, allows its defined setting or adjustment for the desired or need-based application to the temperature control object via the regulation or control. This is because the intended goal of regulating or controlling the temperature of the temperature control object is to apply it as required, taking into account or taking into account the three characteristics of the defined condition of the temperature control medium, directed order and defined duration of the order.

On the one hand, a temperature control medium must be defined in its state, the physical parameters for its characterization being adjustable via the regulation or control. Important parameters are pressure, temperature, speed, material composition, drop size of a two-phase fluid tempering agent and others. On the other hand, the flow of the fluid temperature control medium has to be directed via the distributor head to defined locations of the temperature control object. The aim is that the entire surface of the temperature control object with all unevenness, in front of and behind built-in and superstructures, is flowed towards in edges and corners. Furthermore, the duration of the application of the temperature control agent has to be defined. It is only through the implementation of these three characteristics of the need-based application that regulation or control of the temperature of the temperature control object or its defined heat exchange with the temperature control medium is possible in a stable process window.

The place of manufacture or feeding and or conditioning, as well as the place of delivery of the fluid temperature control medium through the distributor head, are separate from one another. This local separation also enables a better thermal separation of the temperature control medium from thermal influences of the molding tool and the surroundings of the tool. For example, the temperature control agent is better thermally shielded by suitable thermal insulation. This means that the temperature control agent reaches the distributor head largely unaffected by thermal effects.

The production of the temperature control agents and their conditioning, as well as their transfer to the distributor head, is carried out using devices of the prior art, such as, for example, valves, pumps, thermostats, tank-like containers, pressure regulators, pipes, control and regulating units, compressed gas cylinders, mist generators and others. Prior art nozzles upstream of the distributor head can also be used to produce or condition a two-phase mixture.

Its state in the distributor head itself cannot be changed because it already has the desired defined state in the distributor head. Through the distributor head itself, it is directed towards the entire temperature control object with its unevenness, superstructures and internals, edges and corners for the purpose of directed flow.

Depending on the application, it is possible to statically align the distributor head with the respective temperature control object. This is done when installing the distributor head. A suitable secure attachment must be implemented. However, it is also possible to align the distributor head dynamically using suitable devices, for example by means of a motor with the aid of suitable actuators. For the dynamic variant, the conditions for alignment in the spatial area in front of the temperature control surface must be available. Furthermore, the additional effort compared to the static alignment should be justified.

• 1a die Seitenansicht eines geometrisch ausgerichteter Verteilerkopf für Fluide nahe einer Formwerkzeug-Randschale mit seitlichen Trenn-Passier-Elementen,
• 1b die Draufsicht auf einen geometrisch ausgerichteten Verteilerkopf für Fluide nahe einer Formwerkzeug-Randschale mit seitlichen Trenn-Passier-Elementen,
• 2 eine Anordnung zur Durchführung des Verfahrens mit Konditionierung eines Temperiermittels und dessen Zuleitung zu den Verteilerköpfen über eine Zirkulationsleitung,
• 3 eine Anordnung für eine Regelung oder Steuerung der Temperatur der Temperier-Oberfläche,
• 4 einen mehrfunktionalen geometrisch ausgerichteten Verteilerkopf, ausgebildet als doppelter Verteilerkopf und
• 5 einen mehrfunktionalen geometrisch ausgerichteten Verteilerkopf, ausgebildet als unterteilter Verteilerkopf.

Several drawings, in which essential features of the invention are shown, are described in more detail below. Show it:

• 1a the side view of a geometrically aligned distributor head for fluids near a mold edge shell with lateral separating-passing elements,
• 1b the top view of a geometrically oriented distribution head for fluids near a mold edge shell with lateral separating-passing elements,
• 2 an arrangement for carrying out the method with conditioning a temperature control agent and its supply to the distributor heads via a circulation line,
• 3 an arrangement for regulating or controlling the temperature of the temperature control surface,
• 4 a multifunctional geometrically aligned distributor head, designed as a double distributor head and
• 5 a multifunctional geometrically oriented distributor head, designed as a divided distributor head.

The one in the 1a and 1b illustrated, geometrically aligned distribution head 4 for fluids forms the end of a supply line 13 for temperature control agents for the purpose of temperature control of the temperature control object. The supply line 13 of the temperature control agent to the distributor head is through a pipeline 14 , Double or multiple pipes, one pipe system 14 , a hose or the like realized. The geometric transition of the supply line 13 to the distributor head 4 itself can be fluent. The distributor head 4 can, for example, be shaped like a cap from the end of a tube or be attached to it in a form-fitting manner. But it can also be the end of a cylindrical tube itself. For example, it can also have bumps and dents, bends or branches, or the like, as is necessary for the geometry and flow against the temperature object just present or a surface to be cooled. The outlet openings 18 of the distributor head 4 for the tempering agent have, for example, the shapes of diffusers 18 , Holes 18 , Slits 18 or other outlet openings 18 , The end of a supply line 13 for the tempering agent, however, can also pass into extensions attached there, such as tubular extensions 17 with outlet openings 18 in the form of diffusers 18 , Holes 18 , Slits 18 or similar. The end of a supply line 13 The temperature control medium is therefore designed in a variety of ways, depending on the geometric requirements of the temperature control object and other cooling requirements. One requirement of temperature control is, for example, that the side separating-passing elements 3 are also to be tempered. For this, tubular extensions 17 individually aligned locally to these lateral surfaces. The entirety of all selected geometrical forms of the end of a supply line 13 , with their variously shaped tubular extensions 17 and the geometric variety of the holes introduced there 18 and further outlet openings, which are necessary for the directed flow of a temperature control agent onto the temperature control object, is used as a geometrically aligned distribution head 4 understood for fluids. This means that the flow conditions of the temperature control medium through the distributor head 4 the geometrical relationships of the temperature control object with its corners and edges and structures, such as ejectors 16 , can be customized. The adjustment is necessary because of the very different geometrical conditions of temperature control objects and the requirements that the temperature control medium brings with it in terms of its material properties. For example, if the temperature control surface is to be used 2 be wetted with liquid water and is a continuous film of temperature control agent or liquid water film on the temperature control surface 2 to ensure that there is liquid water on the entire temperature control surface through the distributor head 2 to distribute accordingly. This means that the water is in every corner, behind obstacles, regardless of whether the temperature control object is to the distributor head 4 positioned relatively above, to the side or below, always on the tempering surface 2 to be applied in such a way that a continuous liquid water film or tempering film is formed on it. In addition, this film has to be renewed constantly. This type of application is understood as a flat application of water or liquid tempering agent. That depends on the conditions of the tempering surface 2 and the space available in the respective polyhedron-like space, for example by means of drop-like irrigation or, for example, by means of several jets of liquid water via the distributor head 4 possible. The goal in any case is the continuous liquid tempering agent film or water film on the tempering surface 2 , This ensures that the temperature control takes place according to the technologically intended type or the desired physical heat transfer mechanisms.

An arrangement for performing the method with conditioning a temperature control agent and its supply to the distribution heads via a circulation line 12 is in 2 shown. The conditioning of temperature control agents takes place through the combination of a tank-like mixing container 7 and mixing points 7.1 , Are mixing containers 7 rather small, such as T-pieces or three-way valves, then these are shown schematically as mixing points 7.1 considered. The supply of the temperature control from the tank-like mixing tank 7 or mixing point 7.1 to the distributor head 4 takes place in pipes, hoses with branches or the like. These supply lines should be designed in such a way that the condition of the temperature control medium is always defined. The condition of the temperature control agent is determined by sensors 8th for determining the condition are recorded and passed on to the regulation or control. The transport of the temperature control agent should be largely unaffected by heat to the distributor head 4 if this is necessary for the temperature control requirement.

A separate conditioning or conditioning device for the temperature control agent for each distributor head 4 is often not necessary for different temperature control objects. A possibility of uniform conditioning for several distribution heads 4 consists of several geometrically aligned distribution heads 4 on a conditioning device, for example a tank-like mixing container 7 , are connected. The material composition is set there. Via an agitator 5 the mixture is homogenized. With a sensor for determining the condition 8th , designed as a sensor for composition 8.1 , the composition in the tank-like mixing container 7 determined and continuously passed on to the regulation or control as a measured value. The tank-like mixing container 7 subsequently, the temperature of the fluid in the thermostat 11 to adjust. Via a sensor for determining the condition 8th , designed as a temperature sensor 8.3 , the temperature of the fluid passing through the thermostat is continuously passed on to the regulation or control. Via a pump 6 with subsequent sensor for determining the condition 8th , designed as a speed sensor 8.4 of the fluid, the flow rate in the pipeline 14 , the piping system 14 or the circulation line 12 continuously passed on to the regulation or control. The required fluid speed is continuously adjusted by adjusting the pump 6 customized. The temperature control medium is supplied with a circulation line 12 a variety of distribution heads 4 fed. Using the circulation line 12 downstream mixing points 7.1 the composition of one or more fluids is individually changed even further. In such downstream mixed points 7.1 can be used for different distribution heads 4 introduced different fluids. For example, in a mix point 7.1 , designed as a three-way valve or T-piece, after the circulation line 12 and in front of the respective distribution head 4 a fluid is introduced for conditioning.

As in 3 shown is a temperature sensor 1 directly on the tempering surface 2 or something sunk in the mold rim 15 arranged and continuously gives its local measured values to the control system 19 or control 19 via a data or measurement line 10 further. Through this continuous transfer of the local measured value of the temperature of the tempering surface 2 to the scheme 19 or control 19 are done by the scheme 19 or control 19 appropriate measures for conditioning the temperature control agent, such as setting the pressure of the temperature control agent in the container 7.2 about the valves 9 , Also the adjustment of the valves 9 takes place via a data or measurement line 10 , A sensor for determining the condition 8th of a fluid, designed as a sensor for pressure measurement 8.2 continuously gives measured values of the pressure in the tank 7.2 to the scheme 19 or control 19 , The pressure is thereby at the predetermined pressure or setpoint of the pressure via the control 19 or control 19 and their adjustment of the valves 9 customized. This ensures that the temperature control agent is applied to the distributor head as required 4 with its tubular extensions 17 and thereby the intended thermal interaction of the temperature control agent with the temperature control surface 2 possible.

A multi-functionality for the best management of temperature control agents to and from the temperature control object through the design of the distributor head 4 is by duplication or subdivision of the distributor head 4 possible. When duplicating the distribution head 4 it is a double or multiple distributor head 4 for a polyhedral space. In 4 is the double distributor head 4 shown schematically. The supply lines 13 the fluids a or b to the temperature control object can be via the double distributor head 4 adapt very well to technological requirements. Furthermore, a fluid can be directed onto the temperature control object via the first distributor head. From the tempering surface 2 Fluids flowing back can advantageously be removed or sucked off via the second distributor head. The double distributor head can also be attached to the spatial area in front of the temperature control object 4 adapt advantageously. The supply line 13 and / or derivation 13 of fluids, simultaneously or alternately in parallel or alternately in series is possible.

Through the double distributor head 4 heating of the temperature control object is advantageously also possible. For example, with a double distributor head 4 hot gas on a part of the tempering surface 2 directed. With the other distributor head 4 is subsequently cooled, for example.

It is also possible with separate spatial subdivisions of the distributor head 4 to work and thereby advantageously perform temperature control scenarios. A subdivision becomes a distributor head 4 divided into one, two or more separate separate rooms. A material interaction of the fluids in the distributor head itself is therefore not possible. With a divided distributor head 4 it is possible to have a single distribution head 4 for different supply lines 13 and / or derivatives 13 to harness at the same time as this in 5 is shown. With a divided distributor head 4 it is possible with a single distribution head 4 fluids at the same time or alternately in parallel or alternately in series a and b to supply or to drain or suck off fluids. For this it is necessary to use the distributor head 4 in different, through walls 20 separate rooms 22 to divide. Also with a divided distributor head 4 it is possible to conduct hot gases. However, the necessary thermal insulation must be ensured so that the fluids are in the adjacent, separate rooms 22 of the divided distributor head 4 not uncontrolled over the walls 20 heat.

Double or multiple, as well as the divided distributor head 4 can with the leads 13 on double or multi-walled pipes 14 or piping systems 14 be connected. These leads 13 route the fluids to the distributor head in the intended manner 4 and / or from the temperature control object via the distributor head 4 path. The supply of fluids to the temperature control object and the suction or drainage of fluids that were thermally interacting with the temperature control object is advantageously possible through the distributor head.

By suitable construction of the supply lines 13 of the distributor head 4 space-saving variants of double-walled or multi-walled pipes or pipe systems can be used, for example as supply lines 13 to the distributor head 4 in the form of double pipes. The two-phase or single-phase application of temperature control agents at the same time or alternately in parallel or alternately in series may be necessary in order to treat the molding tool particularly gently in the material process.

This multifunctionality is very important for the management of the supply and discharge of the fluids to and from the temperature control object. For example, it is important to remove the used fluids flowing back from the temperature control object in accordance with the cycle times. There are also relative positions of the temperature control surface 2 to the distributor head 4 , for example the arrangement of the tempering surface under the head 2 , With this arrangement, for example, a liquid tempering agent would not mechanically move from the tempering surface 2 drained or suctioned off, then this would largely remain there.

Through all types of distribution heads 4 is also the need-based application of more than a part of the temperature control surface 2 or more than one temperature control object possible, as this in 5 is shown. This allows sub-areas 2 individually or as a group individually with at least one fluid temperature control agent via at least one distributor head 4 apply. About the separation-passing elements 3 of the polyhedron-like spaces on the tempering surface 2 can be a single header 4 two or more areas of the tempering surfaces 2 apply temperature control. In 5 is that with a divided distributor head 4 shown. The right and middle separating-passing element 3 separates the right polyhedron-like space. The middle and left separation-passing element 3 separates the left polyhedron-like space. The divided distributor head 4 is positioned in the right polyhedral space. About local breakthroughs 21 in the middle separating-passing element 3 is the implementation of tubular extensions 17 possible in the left polyhedron-like space.

Depending on the requirements for the distributor head 4 is a constructive design of the distributor head 4 necessary. For example, this is done by tubular extensions 17 the distribution heads 4 reached. This means that all types of distributor heads can be used 4 several sub-areas of the temperature control surface in parallel 2 apply. A divided distributor head 4 or a multiple or double distributor head 4 can simultaneously or alternately in parallel or alternately in series several tempering surfaces 2 apply. It depends on the design of the distributor head 2 and the pipeline leading to it 14 or the piping system 14 for its supply options 13 and derivation 13 of tempering agents. Furthermore, the design of the separation-passing elements 3 important between the individual polyhedral spaces. For example, slot-like openings 21 of the separating-passing element 3 directly on the tempering surface 2 a tubular extension 17 be passed through. The leadership of tubular extensions 17 from a distribution head 4 Several polyhedron-like spaces can also have different types of openings 21 , for example in the form of holes in the separating-passing elements 3 be accomplished.

The individual application of a group of sub-areas of the tempering surface 2 is also for further away from the respective positioned distribution head 4 horizontal tempering surfaces 2 possible. For example, there is the distributor head 4 in a given polyhedron-like room and should have certain tempering surfaces 2 are applied over several separation-passing elements 3 are distant from each other, then, for example, tubular extensions 17 from the distributor head 4 also in more distant parts of the tempering surface 2 to lead. It can also be used on two or more tempering surfaces 2 which are locally further apart from one another, from a subdivided and / or a double or multiple distributor head 4 Feed fluids in and out.

In addition to the basic property of the distributor head 4 The distributor head is to direct the flow towards the temperature control object 4 also multifunctional. This multi-functionality of the distributor head 4 consists in the possibilities of the supply line 13 of fluids to and from the drain 13 of fluids from the temperature control object, as well as in the distribution of the fluids to more than one temperature control object. Correspondingly, fluids of the temperature control scenario are supplied or removed simultaneously or alternately in parallel or alternately in series. Furthermore, through the appropriately chosen distribution head 4 the supply and discharge 13 from fluids to or from one or a group of temperature control objects individually possible.

Even the supply line 13 for example gaseous fluids for the purpose of blowing out or blowing away liquid temperature control agents from the temperature control surface 2 is possible. For example, air blasts can cause residues of liquids from the tempering surface 2 be blown. This can, for example, in for derivation 13 the unfavorable local lowering of the tempering surface 2 accumulate. Furthermore, such fluids can also be suctioned off or drained off.

In the design phase of the tool, the scenario of tempering with the required fluids for the respective sub-areas of the tempering surface is also shown 2 established. With the material composition of the fluids, their changes occur during the interaction on the tempering surface 2 , for example that of the physical state of the entire liquid temperature control agent or of parts of liquid temperature control agent. During tempering with liquid water, parts of liquid water can evaporate, for example. Due to the increase in the volume of the vapor of a substance compared to its same amount of liquid volume, there may be a need for rapid drainage 13 from the tempering surface 2 Fluids, for example, have to be suctioned off.

Furthermore, the structure of the respective polyhedron-like space and the geometric shape of the tempering surface 2 with their internals and superstructures for the shape of the distributor head 4 important. For example, it has corresponding bends. This gives the appearance or the structure of the distributor head 4 for tempering the respective tempering surface 2 , such as its subdivision, the type and number of its individually aligned outlet openings 18 and tubular extensions 17 for the directed flow of the fluids onto the tempering surface 2 , In addition to the resulting geometric shape of the distributor head 4 is also its secure attachment and alignment for a need-based application of the tempering surface 2 to be determined with fluid tempering agents. For example, this is done by attaching the distributor head to the separating-passing elements 3 of the polyhedral space.

For planning the application of demand and especially the directed flow of the fluids to all areas of the temperature control surface 2 for example, simulations of a fluidic type are carried out.

The multifunctionality makes it easier to manage the fluids for the tempering surfaces 2 possible, i.e. supply line 13 , Derivative 13 and the distribution of different fluids. The multi-functionality is often the basis for a need-based application of the temperature control object or the temperature control surface 2 with fluids. Hence the distribution head 4 often multifunctional.

A multi-functionality of the distributor head 4 is also desirable, for example, if the temperature control regime is to be changed from cycle to cycle. This will even be necessary if process disturbances become noticeable, whereby the task is to keep the process in a stable process window of temperature automatically or according to predetermined routines, or to feed it back into one. Or, for example, for the process of starting, the tool should be guided out of its initial thermal state into a stable thermal process window or temperature window. It may be necessary to change the cooling intensity of the temperature control medium in the course of the temperature control of the given process cycle. For such situations, for example, the material composition of the temperature control agent or its speed has to be changed or adapted to the requirements. This is also done by changing the temperature of the temperature control means or the like. A multifunctional distribution head 4 For such purposes it is appropriate if, for the transition from, for example, a state one to a state two, it is better to use a different tempering agent, or if another tempering agent is to be used more advantageously in state two than in state one. A multi-functional distributor head is also appropriate if some polyhedron-like rooms have to be permanently flushed with inert substances, but a temperature control scenario is also running.

Furthermore, it is necessary to use different temperature control agents in new temperature control scenarios to be tested. Multifunctionality is also desirable for this.

LIST OF REFERENCE NUMBERS

1

Temperature sensor for measuring the local temperature of the tempering surface

2

Tempering surface, partial area of the tempering surface

3

Separating-passing element

4

distribution head

5

agitator

6

pump

7

tank-like mixing container

7.1

mixing point

7.2

container

8th

Sensor, sensor for determining the condition of a fluid

8.1

Material composition sensor

8.2

Pressure measurement sensor

8.3

Temperature Sensor

8.4

speed sensor

9

Valve

10

Data line or measurement line

11

thermostat

12

circulation line

13

Inlet, discharge

14

Pipeline, piping system

15

Mold peripheral shell

16

ejector

17

tubular extension

18

Outlet opening in the form of diffusers, holes, slots

19

Regulation or control

20

Wall for dividing a distributor head

21

breakthrough

22

Separate separate room in a divided distribution head

a

Fluid a

b

Fluid b

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• WO 002017076399 A1 [0001]
• DE 2249844 A [0006]
• DE 1279605 A [0006]
• DE 29906723 U1 [0007]
• DE 102015105680 A1 [0008]
• GB 2163674 [0009]
• FR 2256790 [0009]
• JP 59130664 [0009]
• EP 0343103 B1 [0010]

Claims (20)

Method for near-contour tempering of shell-shaped molds with parts of a tempering surface (2) geometrically delimited by separating-passing elements (3) on at least one rear side of the mold rim (15) of a mold, the parts of the tempering surface (2) individually or as a group individually with at least one fluid temperature control means via at least one distributor head (4), the at least one fluid temperature control means in the form of a single-phase or two-phase temperature control means being uniform and largely thermally unaffected by individual, several or all sub-areas (2) Forming tool or from the respective sub-area of the tempering surface (2) of the molding tool is generated and fed and passed through the distributor head (4) to the respective sub-area of the tempering surface (2), the state of the at least one fluid tempering agent being removed from the and the temperature detected at the respective partial areas of the temperature control surface (2) and the measurements are transmitted to a regulation (19) or control (19) Procedure according to Claim 1 , characterized in that the at least one fluid temperature control agent is supplied in the form of a spray or spray and / or as a gas and / or as a liquid. Procedure according to one of the Claims 1 and 2 , characterized in that the amount and / or the material proportions of the at least one fluid temperature control agent for the respective partial areas (2) are conditioned by means of the regulation (19) or control (19). Method according to one of the preceding claims, characterized in that in the case of a liquid temperature control agent as a fluid temperature control agent, a closed temperature control agent film is formed on the temperature control surface (2). Method according to one of the preceding claims, characterized in that the at least one fluid temperature control agent is conditioned and / or the duration of the application of the at least one fluid temperature control agent for the respective partial areas of the temperature control surface (2) by means of the regulation (19) or controller (19 ) be adjusted. Method according to one of the preceding claims, characterized in that the respective partial areas of the temperature control surface (2) are acted upon in a directed manner with the at least one fluid temperature control agent. Method according to one of the preceding claims, characterized in that the carrier gas or at least one further gas or fluid is admixed with the at least one fluid temperature control agent for the respective subregions (2). Method according to one of the preceding claims, characterized in that the fluid temperature control means are supplied as single-phase or two-phase temperature control means simultaneously or alternately in parallel or alternately in a row to the temperature control surface (2) or are derived or sucked off from it. Method according to one of the preceding claims, characterized in that the fluid temperature control agent is blown and / or sucked out of the respective partial areas. Device for near-contour tempering of shell-shaped molds with parts of a tempering surface (2) geometrically delimited by separating-passing elements (3) on at least one rear side of the mold edge shell (15) of a mold, the parts of the tempering surface (2) with at least one fluid temperature control means by means of at least one geometrically oriented distribution head (4) with at least one outlet opening (18), where appropriate, sensors (1, 8) at least for measuring the temperature on the partial areas of the temperature control surface (2) and for Detection of at least one state of the at least one fluid temperature control means is present, the sensors (1, 8) being connected to a regulation (19) or controller (19). Device after Claim 10 , characterized in that the distributor head (4) is divided into one, two and more separate spatial areas. Device according to one of the Claims 10 and 11 , characterized in that the at least one distributor head (4) and / or the at least one outlet opening is geometrically adapted to the respective spatial area in front of and to the internals in the partial areas and / or to the respective partial area. Device according to one of the Claims 10 to 12 , characterized in that the at least one outlet opening (18) comprises at least one tubular extension (17) with at least one outlet opening (18). Device according to one of the Claims 10 to 13 , characterized in that the outlet openings (18) comprises diffusers (18), holes (18) and / or slots (18). Device according to one of the Claims 10 to 14 , characterized in that the at least one outlet opening (18) or the at least one tubular extension (17) is individually locally oriented. Device according to one of the Claims 10 to 15 , characterized in that the at least one fluid temperature control means can be conducted to and from the at least one distributor head (4) and / or polyhedron-like space via at least one pipeline (14) or at least one pipeline system (14) and / or at least one circulation line (12) and / or is derivable or extractable from the respective partial area of the temperature control surface (2). Device after Claim 16 , characterized in that the at least one pipeline (14) or the at least one piping system (14) has two or more walls at least upstream of the distributor head (4). Device according to one of the Claims 16 and 17 , characterized in that the at least one pipe (14) or the at least one pipe system (14) and / or at least one circulation pipe (12) is connected to at least one tank-like mixing tank (7) or tank (7.2). Device according to one of the Claims 16 to 18 , characterized in that the at least one pipe (14) or the at least one pipe system (14) has a mixing point (7.1) for a fluid upstream of the distributor head. Device according to one of the Claims 10 to 19 , characterized in that the feeding or the production of the fluid temperature control agent from the mold and the transport to the temperature control surface (2) is thermally unaffected.

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