DE19625426A1 - High strength composite connector, connector use - Google Patents

Abstract

The composite connector, especially a rock anchor, comprises an outer main body(10) with one or more surface projections(20), one or both of which are made from a polymer with one or more reinforcing elements(12), and an inner core(30). In a process for manufacturing the connector the reinforcing elements(12) are arranged in a tool, impregnated with a polymer and a core(30) is then inserted into the tool inside the reinforcement(12) before the polymer is cured. The process equipment comprises a tool with the negative profile of the connector projections(20), a polymer supplying and impregnating unit, equipment for feeding one or more reinforcing elements(12), preferably glass fibre bundles and a device for locating a core(30) in the connector moulding tool. Claimed uses for the connector are as rock anchors, screws, frameworks, pipe connectors, struts, masts, suspensions, concrete reinforcement, tie rods, dielectric tension devices, threaded components and/or gear shift rods, especially electrically insulating types.

Description

The present invention relates to a connecting device, a method for Manufacture of the same, a device for carrying out the method and use of the connector.

DE 38 34 266 A1 discloses a tension rod made of fiber composite material, which with a profile of ribs and depressions that are trapezoidal in section is provided. The profiling is created by selecting the tension rod hardening of the unidirectional fibers and with each other adhesive resin from the outside in the radial direction a deformation pressure is built up, through which the depressions are created as impressions. However, the deformation pressure has the consequence that the unidirectional fibers in Towards the center of the tension rod can be moved, causing the radial outer areas of the tension rod are not sufficiently reinforced and not high Can absorb shear force.

EP 560 362 A2 discloses a fiber-reinforced plastic reinforcement for concrete, projecting sections and grooves alternately on the outside are provided to provide an uneven surface profile. The protruding sections or grooves are pressed during a pressing process of extruding the plastic resin into a die. Alternatively can the projecting sections or grooves by cutting or milling be generated. This known reinforcement can because of the radial Ver pushing inside the fiber reinforcement or because of the fiber interruption do not absorb high shear forces in the radially outer areas.

Accordingly, it is an object of the present invention to provide a connection  To provide direction, which has increased strength and the On taking high forces, especially tensile or shear forces in one radially outer area. It is still the task of the present Invention a method for producing a connecting device, a Device for carrying out a method for producing a connector Provide device, which is simple and inexpensive Manufacturing enables. It is a further object of the present invention specify advantageous use of the connecting device.

This object is achieved by a connecting device according to claim 1 The method of claim 12, an apparatus for performing a Ver driving to produce a connecting device according to claim 16 or solved by using a connecting device according to claim 21. Preferred embodiments of the present invention are in the sub claims included.

The invention provides a connecting device, in particular a rock anchor, ready, which comprises: a base body, at least one projection and a Core element, wherein the base body and / or the projection made of a polymer is formed and reinforced with one or more reinforcing elements or are. Accordingly, the connection device according to the invention has a increased strength.

According to a preferred embodiment of the invention, the base body and the projection is formed in one piece. This allows a stable and cost favorable construction of the connecting device, the reinforcing elements or fibers run both in the base body and in the projection can.

The polymer is furthermore preferably a thermoset, in particular a mixture made of epoxy resin and hardener, a polyester resin and / or a vinyl ester resin, wherein the reinforcing elements in the base body and / or are particularly preferred  are at least partially embedded in the projection. As a result, the Connecting device an increased level of forces, especially tensile and Absorb shear forces, the ones running in the area of the projection Reinforcing elements give it increased strength.

The reinforcing elements are or are particularly preferably elongated Continuous fibers, in particular elongated continuous glass fibers, rovings, metal wires, Textile, aramid, carbon and / or metal fibers, preferably the reinforcement Kungselemente substantially in the longitudinal direction of the connecting device run. Accordingly, those acting on the connecting device Forces, in particular tensile forces, are advantageously evenly absorbed or be dissipated.

Most preferably, the core element has at least one core projection, which preferably corresponds essentially to the projection. As a result the reinforcing elements, in particular the fibers, run along the Au outer profile of the core element and are radially reduced by the core projection outside, preferably according to the projection or in the vicinity thereof or Area moved.

According to a further preferred embodiment, the projection is on the Outside of the base body is provided at least in some areas.

The projection is furthermore preferred as a circumferential, at least region as contiguous thread provided or it has one. As a result, the connecting device is inexpensive to manufacture possible through a continuous process.

The core element is particularly preferably essentially centered in the base body arranged. The connecting device is thus in the circumferential direction in we substantial symmetrical structure, which ensures uniformity of forces dissipation is achieved.  

Most preferably, the connecting device also has a one-piece construction formed with the base body, at least with the reinforcing element partially reinforced rod-shaped element, preferably the reinforcement Kungselement in the rod-shaped element substantially in the longitudinal direction is arranged. Accordingly, the connection device is particular Particularly suitable as a rock anchor.

The invention further provides a method for producing a connection device, in particular a connecting device according to the invention, ready, comprising the steps of: arranging at least one ver Strengthening element in a particularly open or closed connection form of device; Wetting or soaking the reinforcing element with a polymer; Arranging a core element in the connection device tion form; and curing the polymer.

According to a preferred embodiment of the invention, the kernel comprises step of arranging or deforming the reinforcing element tes, preferably at least partially along a recess, where as Reinforcing elements elongated continuous fibers, in particular elongated endless fibers Glass fibers, metal wires, textile, aramid, carbon and / or metal fibers ver be applied.

The core element arrangement step further preferably comprises screwing in or inserting the core element into an intermediate space of the connection directional. It is thus possible to use connecting devices with an arbitrary produce longitudinal expansion, since screwing the core element into especially with a movement in the longitudinal direction of the already manufactured or extruded part of the connecting device is possible. Furthermore allows screwing a simple displacement of the reinforcing elements in radial direction, which in particular a displacement of this in one or more Recesses of the connector shape is facilitated.  

Most preferably, the method comprises one or more of the following Steps: Form one or more protrusions on at least areas the connecting device, in particular by providing one or multiple recesses in the connector form; Unroll from Continuous fibers, especially of endless glass fibers or rovings as reinforcements kung elements; Arrange, preferably radial displacement or pressing or Pressing or deforming the reinforcing elements, especially the fibers between one or more protrusions of the core element and recesses the shape of the connector; Close parts of the connection directional shape, preferably for the radial pressing of the reinforcing elements, especially the fibers between one or more protrusions of the Core element and recesses of the connector shape; Wrapping the reinforcing elements with a fabric, in particular a gauze, or a monofilament, which preferably extends over the entire length of the Extend connecting element and / or rod; and / or lengths of ver binding device.

The invention further provides an apparatus for performing a ver driving, in particular the method according to the invention, for producing a Connection device, in particular the connection device according to the invention direction, ready, which includes a connector form with the negative impression of at least one projection of the connecting device, a polymer feeder, a reinforcing member feeder for Feeding at least one reinforcing element, and a core element arranging device for arranging a core element in the connection device shape.

According to a preferred embodiment of the invention, the core element rotates arranging the core element in an intermediate space of the connector introduces or introduces the device form, preferably that Reinforcing element is displaced radially or deformed.  

The polymer feed device further preferably preferably has one Arranged nozzle on to wet or soak the reinforcement element elements with a polymer, in particular with a mixture of epoxy resin and Hardener, a polyester resin and / or a vinyl ester resin or another commercially available thermoset system and / or another (commercially available) thermoplastic polymer.

Particularly preferably, the device also has a device for Lengths of the reinforcing elements, a device for pulling and conveying the reinforcing elements and / or a device for curing, preferably Hot curing of the thermoset polymer in particular, preferably by means of In infrared and / or UV rays and / or by means of HF contact hot air.

Most preferably, the reinforcing element feed device or Outlet gate rolls or spools for storing endless glass fibers, rovings, Metal wires, textile, aramid, carbon and / or metal fibers and / or a hole plate with preferably a circular hole arrangement, the Glasfa sern, rovings, metal wires, textile, aramid, carbon and / or metal fibers particularly preferably through the perforated plate to the nozzle inlet or polymer be guided.

The invention further teaches a use of the Ver binding device for rock anchors, screws, scaffolding, pipe connections, Rods, masts, suspensions, concrete reinforcements, tie rods and / or for Shift rods, in particular electrically non-conductive shift rods.

Other objects, features and advantages of the present invention will become apparent from the following exemplary description of preferred embodiments can be seen with reference to the drawing, the same or similar Elements are provided with the same reference numerals.  

Fig. 1 (A) is a view, partly in section, of an embodiment of the connecting device according to the invention;

Fig. 1 (B) is a sectional view along a part of the connecting device shown in Fig. 1 (A);

Fig. 2 is a schematic representation of an embodiment of the inventive device for performing a method for manufacturing a connecting device;

Fig. 3 is a partial enlarged view of the device shown in Fig. 2; and

Fig. 4 (a) to (f) are schematic illustrations of an embodiment of the inventive connection device for producing a Ver wherein Fig. 4 (b) is a section along A-A in Fig. 4 (a) and Fig. 4 ( d) is a section along BB in Fig. 4 (c).

The embodiment shown in Fig. 1 of the connecting device according to the invention has a base body 10 made of a polymer. At least one radially projecting, in particular thread-like projection 20 is provided on regions of the outer peripheral surface of the base body 10 , the projection 20 preferably being formed in one piece or integrally from the same polymer as the base body 10 . The base body 10 and / or the pre jump 20 are reinforced with reinforcing elements, which are preferably embedded in the polymer. As reinforcing elements are such. B. elongated preferably longitudinal fibers, glass fibers, metal wires or strands, plastic, textile, aramid, carbon and / or metal fibers or the like.

A core or core element 30 is arranged within the base body 10 and has one or more core projections 32 on or on its outer circumferential surface. The core projection 32 is arranged in a region which corresponds to the projection 20 on the base body 10 , namely radially inwardly spaced, so that surfaces or regions of the core projection 32 run substantially parallel to surfaces of the projection 20 or are angeord net. The reinforcing members 12 are embedded in the base body 10 and / or in the projections 20 and run-making apparatus in the longitudinal direction of the Verbin, wherein the reinforcing members 12 is a gene the Kernvorsprün 32 have rounded corresponding wavy course and range arranged substantially parallel to the core protrusions 32 are . Thus, at least a portion of the reinforcement members 12 run along and reinforce the surface of the protrusion 20 , whereby the protrusion 20 has a higher strength compared to those according to the prior art.

Next, an embodiment of the device according to the invention for producing a connecting device will be described with reference to FIGS. 2 and 3, the connecting device corresponding to a preferred embodiment of the connecting device according to the invention.

A resin is produced in a kneader (not shown), namely before being fed out of 100 parts epoxy resin (DOW DER 330), 90 parts hardener (XZ 87 744.00) and 1.5 parts accelerator (K54), and a pressure vessel 54 . On coils 51 wound rovings 12 are inserted through a perforated plate 52 into a nozzle device or nozzle 54 essentially along a longitudinal direction and soaked or wetted with the polymer. The impregnated rovings or fibers 12 are then arranged in a connecting device form or thread form 56 , which is provided with recesses 56 a. The resin is, as shown in Fig. 3, through resin inlets 55 a an interior 55 e of the nozzle device 55 , where the fibers 12 are wetted with the resin. The fibers 12 are carried at least one fiber inlet 55 d preferably in the nozzle device 55 radially inwardly tapering introduced and from Faserauslässen 55 f from the nozzle means 55 preferably extend parallel to a longitudinal axis omitted. The nozzle device 55 has an outer part 55 b and an inner part 55 c, which are arranged concentrically to one another.

The fibers 12 , the mixing ratio of which preferably consists of 40 to 20 parts of resin mixture and 60 to 80 parts of glass fibers, are preferably arranged uniformly distributed along the inner circumferential surface of the interior or opening of the connecting device mold 56 and run essentially parallel to the longitudinal axis of the interior, the fibers 12 before being given by a (not shown) stretching device or AbzugEINrich device in the longitudinal direction slightly stretched or placed under tension or tension.

A core element or core 30 (not shown) by between the fibers 12 Kernelemen tenanordnungseinrichtung preferably concentrically in the interior of the connection device 56 is arranged form. In order to facilitate the arrangement of the core element 30 between the fibers 12 , in particular in order to better displace or shift the fibers 12 , the core element 30 has a preferably substantially tapered front part at the front end. The core element 30 is further provided with one or more core projections 32 , which essentially correspond to the recesses 56 a of the connection device shape. The core element 30 is preferably rotated about its longitudinal axis so that the thread-shaped core configured protrusion 32 may be a compound of the form of apparatus 56 engage with the thread-shaped recess being stalteten 56th Since the fibers wetted with resin are arranged between the recess 56 a and the core projection 32 , these are moved radially outward when the Kernele element 30 is inserted, the fibers 12 in particular being displaced or displaced into the recesses 56 a of the connecting device form 56 . The fibers 12 are thus arranged in regions in the recess 56 a and in regions between the core projection 32 and thus strengthen the projection 20 to be formed on the base body 10 .

In one piece with the base body 10 , a rod-shaped element 14 can be configured, which can be of any length depending on the application form.

The device further comprises a high-frequency, hot air, UV and / or IR curing oven or channel 57 , a trigger 58 and a cutting device 59 for separating two successive connecting devices 60 .

Preference is given to a wrapping device (not shown) preferably directly after the nozzle device with the tubular glass fiber strand wrapped in a fine gauze ribbon (cotton, plastic or glass) and through the gauze band is shaped into a full-rod-like structure. It arises Resin-moist, round glass fiber strand in cross-section.

In a not shown embodiment of the device for manufacturing a connector, the connector form is two or several separate molded parts and it first becomes the core element with a core projection formed on it between the molded parts arranged. The fibers around the core element are then preferably in the arranged essentially in the longitudinal direction. Then the molded parts become assembled, with recesses provided in the molded parts of the core correspond to the projection and at least partially intervene in it. The between Core element and molded parts arranged fibers "lay" or deform then such that the gaps between the core element and molded parts fill in so that they are partially in the projections or the verbin device run.

An embodiment of the method according to the invention for producing a connecting device will be described below with reference to FIGS. 4 (a) to (f), the connecting device corresponding to an embodiment according to the invention.

A connecting device 56 with at least one, preferably thread-shaped recess 56 a is preferably formed from two molded parts 56 'and 56 ''. Reinforcing elements or fibers 12 impregnated with a polymer are introduced essentially in the longitudinal direction into an interior of the connecting device mold 56 , the fibers 12 preferably being arranged essentially in a ring (see FIG. 4 (d)).

A core element 30 with at least one, preferably corresponding to the recess 56 a, core projection 32 is inserted into the interior of the connection device form 56 essentially along the longitudinal axis, preferably in the middle, the core element 32 preferably being rotated about the longitudinal axis (arrow D in FIG . 4 (e)), whereby the thread-like core protrusion 32 engages in the recess 56 a. The fibers 12 are thus deformed radially outwards by the core projection 32 and are arranged in the recesses 56 a.

The polymer is then cured and the molded parts 56 'and 56 ''opened.

In the preceding embodiments, the connection devices have been described with at least one preferably threaded projection 20 . Depending on the field of application, however, the projection 20 can also be ring-shaped, triangular, trapezoidal, polygonal or irregular in section.

The connecting device described above is particularly suitable for rock anchors, screws, scaffolding, pipe connections, rods, masts, Suspensions, concrete reinforcements, tie rods and / or for shift rods, in particular electrically non-conductive switching rods or the like., z. B. do not like tables, dielectric parts.

Claims (21)

1. Connection device, in particular rock anchors, which comprises: a base body ( 10 ), at least one projection ( 20 ) and a core element ( 30 ), the base body ( 10 ) and / or the projection ( 20 ) being formed from a polymer and having a or more reinforcement elements ( 12 ) is or are reinforced. 2. Connecting device according to claim 1, wherein the base body ( 10 ) and the projection ( 20 ) are integrally formed. 3. Connecting device according to one of the preceding claims, wherein the polymer is a thermoset, in particular a mixture of Ep oxide resin and hardener, a polyester resin and / or a vinyl ester resin or is a thermoplastic. 4. Connecting device according to one of the preceding claims, wherein the reinforcing elements ( 12 ) in the base body ( 10 ) and / or at least partially in the projection ( 20 ) are embedded. 5. Connecting device according to one of the preceding claims, wherein the reinforcing elements ( 12 ) elongated continuous fibers, in particular elongated continuous glass fibers, rovings, metal wires are glass, textile, metal, aramid, carbon fibers and / or boron or silicon-containing fibers, wherein the reinforcing elements ( 12 ) preferably run straight in one plane and corrugated in another plane. 6. Connecting device according to one of the preceding claims, wherein the reinforcing elements ( 12 ) extend substantially in the longitudinal direction of the connecting device. 7. Connecting device according to one of the preceding claims, wherein the core element ( 30 ) has at least one core projection ( 32 ), which preferably substantially corresponds to the projection ( 20 ). 8. Connecting device according to one of the preceding claims, wherein the projection ( 20 ) on the outside of the base body ( 10 ) is provided at least in regions. 9. Connecting device according to one of the preceding claims, wherein the projection ( 20 ) is provided as a circumferential, at least partially coherent thread. 10. Connecting device according to one of the preceding claims, wherein the core element ( 30 ) is arranged substantially centrally in the base body ( 10 ). 11. Connecting device according to one of the preceding claims, which further comprises an integrally formed with the base body ( 10 ), with the reinforcing element ( 12 ) at least partially reinforced rod-shaped element ( 14 ), preferably the reinforcing element ( 12 ) in the rod-shaped element ( 14 ) is arranged substantially in the longitudinal direction. 12. A method for producing a connecting device, in particular according to one of the preceding claims, which comprises the following steps:
Arranging at least one reinforcing element ( 12 ) in a connector form ( 56 );
Wetting or soaking the reinforcing element ( 12 ) with a poly mer;
Placing a core member ( 30 ) in the connector form ( 56 ); and curing the polymer. 13. The method of claim 12, wherein the core member arranging step comprises placing and shaping of the reinforcing member (12) before Trains t at least partially along a return jump (56 a), wherein, as the reinforcing elements (12) elongated continuous fibers, in particular elongated continuous glass fibers, rovings Metal wires glass, textile, metal, aramid, carbon fibers and / or fibers containing boron or silicon can be used. 14. The method of claim 12 or 13, wherein the core member assembly step comprises screwing the core member ( 30 ) into a space of the connector form ( 56 ). 15. The method according to any one of claims 12 to 14, which further comprises one or more of the following steps:
Forming one or more protrusions ( 20 ) on at least areas of the connector;
Unrolling of continuous fibers, in particular of continuous glass fibers as reinforcing elements ( 12 );
Arranging, preferably radially shifting or pressing or pressing or deforming the reinforcing elements ( 12 ), in particular the fibers, between one or more projections ( 32 ) of the core element ( 30 ) and recesses ( 56 a) of the connecting device shape ( 56 );
Closing parts of the connecting device mold ( 56 ), preferably for radially pressing the reinforcing elements ( 12 ), in particular the fibers, between one or more projections ( 32 ) of the core element ( 30 ) and recesses ( 56 a) of the connecting device mold ( 56 );
Wrapping the reinforcing elements ( 12 ) with a fabric, in particular a gauze; and / or lengths of the connecting device. 16. Device for carrying out a method for producing a connecting device, in particular according to one of claims 12 to 15, which comprises:
a connector form ( 56 ) with the negative impression of at least one protrusion ( 20 ) of the connector,
a polymer feed device ( 54 , 55 ),
a reinforcing element feed device ( 51 , 52 ) for feeding at least one reinforcing element ( 12 ), in particular glass fiber bundle, and
core element arranging means for arranging a core element ( 30 ) in the connector form ( 56 ). 17. The apparatus of claim 16, wherein the Kernelementanordnungsein direction, the core element ( 30 ) in an intermediate space of the connecting device form ( 56 ), wherein preferably the reinforcing element ( 12 ) is radially displaced or deformed. 18. The apparatus of claim 16 or 17, wherein the Polyamidzuführeinrich device ( 54 , 55 ) has a preferably circumferentially arranged nozzle ( 55 ) for wetting or impregnating the reinforcing elements ( 12 ) with a polymer, in particular with a mixture of epoxy resin and hardener, a polyester resin and / or a vinyl ester resin or a thermoset or thermoplastic, the polyamide feed device ( 55 , 54 ) preferably further comprising a polymer pressure vessel ( 54 ). 19. Device according to one of the preceding claims 16 to 18, which further comprises a device ( 59 ) for lengthening the reinforcing elements ( 12 ) and / or a device ( 57 ) for curing the polymer, before given by means of infrared, ultraviolet rays, high-frequency waves and / or hot air and / or a moving heated molding device. 20. Device according to one of the preceding claims, wherein the Ver reinforcing element feed device ( 51 , 52 ) coils ( 51 ) for storing endless glass fibers, rovings, metal wires glass, textile, metal, macaw, carbon fibers and / or boron or Fibers containing silicon and / or a perforated plate ( 52 ), the endless glass fibers, rovings, metal wires, glass, textile, metal, aramid, carbon fibers and / or boron or silicon-containing fibers preferably by means of the perforated plate ( 52 ) can be fed into the polymer feed device ( 54 , 55 ) in the desired arrangement. 21. Use of a connecting device according to one of claims 1 up to 11 for rock anchors, screws, scaffolding, pipe connections, rods, Masts, suspensions, concrete reinforcements, tie rods, dielectric Traction devices, threaded devices and / or for switching rods, especially electrically non-conductive switching rods.