DE3241288A1 - FOUNDRY MOLDING SYSTEM - Google Patents

Description

NER LICHTI 32 A 1

DR. ING. HANS LICHTI "·: DIRL." TNC: H Ε.ΓΝ DIPL.-PHYS. DR. JOST LEMPERT PATENTANWÄLTE

D-7500 KARLSRUHE 41 (GROTZ I NGEN> · DURLACHER ST. 31 (HIGH-RISE)

TELEPHONE (0721) 48511

6580/82 ly BMD

Badische Maschinenfabrik ° ⁸ · ^N ° ^v * ™ ^ber

DurI ach GmbH
Pf inztalstrasse 90

7500 Karlsruhe 41

Foundry molding line

The invention relates to a foundry molding plant with a molding machine, made in the alternating upper and lower box of a box shape are, a rectangular path incorporating the molding machine, the one Turning station for the molded lower case, a core insertion line, a loading station for the molded upper and lower box, a pressing station for the complete mold and a separating station, from which the empty lower and upper boxes are fed one after the other to the molding machine are, has and with a pouring and cooling section.

Molding systems of this construction for box casting are in many embodiments known. Your special training and the arrangement of the various workstations depends on the spatial conditions and in individual cases also according to the special casting requirements, which are placed on this molding line. In box casting, efforts are particularly made to reduce the number of molding boxes circulating in the system to keep it as low as is justifiable in order to reduce costs on the one hand

the system, on the other hand the transport costs for the empty molding boxes to lower. In the known system (DE-AS 1 962 131) an elongated rectangular track is provided on one long side one behind the other the cutting station, the molding machine, the core insertion line and the loading station are arranged. The complete box shapes over a cross conveyor to the other long side of the rectangular track, which is extended over the cross conveyor. This long side of the rectangular track includes the casting and cooling section, with two apron belt conveyors being arranged one above the other. Everyone Apron conveyor has two adjacent places. The construction costs of conveyor systems and the space required for this molding system is considerable.

In the case of boxless forms, the construction costs for the conveyor systems can be significantly reduced, since the empty molding boxes do not have to be returned. The mold frames required for the production of the mold can be guided in a short circuit around the molding machine and the shape is transferred directly from this short circuit to the Casting and cooling sections are released. Such a system can so build relatively compact. However, boxless casting is not possible in all cases.

The invention is based on the object of a foundry molding system for to train the cast box with the structure described above so that a space-saving compact design with the possibility of adaptation to every application failure is possible and the manufacturing costs of such Plant can be reduced considerably.

This object is achieved according to a first basic idea of the invention in that on a head side of the molding system, which is of a The narrow side of the rectangular path is formed, the molding machine and the turning station are arranged, a subsequent one in the conveying direction longer section of the rectangular track has the core insertion section, the feeding station and the casting section, while the parallel to it, other longer section of the rectangular path is designed as a cooling section and is returned to the press-out station close to the molding machine from which the molds pass to a further cooling line located directly next to this cooling line with an opposite conveying direction, while the empty molding boxes arrive in the opposite direction via the separating station to the molding machine.

The casting line and the first part of the cooling line on which the Molds are still in the molding box, can be arranged relatively close to each other and parallel, so that a narrow rectangular path is given is. The narrow side of the rectangular track arranged at the top of the system will usually be somewhat wider. In the longitudinal direction is This additional space requirement is sensibly used by the fact that the second Part of the cooling section is arranged immediately next to the first part and the conveying direction on these two parts of the cooling section, which over the expressing station are in communication with each other, are opposite to each other, so that the total length of the system to the necessary Measure is limited. On the other hand, the length of the core insert and casting line, as well as the length of the cooling line without difficulty adapt to widely differing needs by adding the individual Funding sections are shortened or lengthened accordingly. However, there is always a molding system with the least possible space requirement in Longitudinal and transverse direction.

According to a preferred embodiment, the molding system is on the head side on the narrow side of the rectangular track directly in front of the molding machine, the cutting station for the empty molding box and immediately A sand stripping and funnel drilling station is arranged behind the molding machine and in front of the turning station.

Through this training - with the exception of the pressing station all Workstations where large quantities of excess or waste sand are produced, concentrated on the narrow side of the rectangular track, so that only there - and at the pressing station - appropriate facilities such as pits and conveyors for receiving the waste sand are necessary.

According to a further feature of the invention it is provided that the The narrow side of the rectangular track is arranged on the head side of the molding system at such a high level that the molding machine is at floor level can be set up, and that the separation station on this The narrow side is arranged at one corner of the rectangular web and is equipped with a separating device that is used on the occasion of separating the empty molding box is the difference between the normal level of the rectangular path and overcomes the increased level on the narrow side of the rectangular track, while a lowering station on the opposite corner is arranged for the molded upper and lower case.

In this way, the molding machine can be set up at normal floor level so that the extensive construction work otherwise necessary for a foundation pit can be dispensed with. It is like it was before In other words, only the pit for the waste sand is required, but no special static requirements are placed on it. the

Overcoming the difference in level requires due to the arrangement and Training of the separator no special lifting devices, there only the stroke of the cutting device needs to be extended accordingly.

In this embodiment it is also advantageously provided that the second part of the cooling section, onto which the expressed shapes are dispensed, is at approximately the same level as that section of the rectangular track located at the top of the system. Here, too, the difference in level is determined in a simple manner by the lifting movement of the device arranged at the press-out station.

The inventive design of the molding system gives the possibility that the section of the rectangular path between the expressing station via the separating station, the molding machine, the lowering station to the loading station than the box directly receiving Bordrolfenbahn and the the casting line and the section of the cooling line receiving the cast box shapes up to the pressing station are designed as a pallet track are, with the press-out station on one long side of the rectangular track and the feed station on the other long side opposite one another and connected by a pallet translator.

This way you are only in the immediate vicinity of the molding machine the relatively expensive on-board roller conveyors are necessary, but that in turn have the advantage that they can be supplemented by shorter sections at any time, while on the much longer sections of the rectangular path a cheap railroad for the pallet wagons can be provided «■

In this embodiment, the end of the Casting line and the opposite beginning of the cooling line through a

ΛΑ

Pallet transfer device connected. Both this and the translator between the press-out station and the loading station can be implemented in a simple manner by means of a rail-mounted carriage, which in turn has rail sections for the rollers of the pallets on its upper side.

As is known, the part of the Cooling section have at least two forms next to each other. These known molding plant is further developed according to the invention in that this part of the cooling section consists of at least two adjacent, endless rubber belt conveyors, in front of the head side of which the press-out station is arranged, on which in turn an upwardly acting push-out cylinder is arranged, which can be moved between two positions on the head side of each of the two rubber belt conveyors. It is a transferring the form from the ejection cylinder to the rubber belt conveyor Slider provided.

So far, apron belt conveyors have mostly been used in the cooling section usually used two, possibly more places exhibit side by side. These apron belt conveyors have the advantage that the molds can be pushed on from the side. The disadvantage, however, is their high cost share in the overall system, a certain susceptibility to interference and not a small amount of noise. Rubber belt conveyors are significantly cheaper, however the shapes cannot be pushed side by side are, which is why only a single tape has been used when using them. According to the invention there are at least two such Rubber belt conveyor arranged side by side and located the Express and transfer station directly at the head of this rubber belt conveyor, so that the forms alternate on one or the other

BATH ORIGINAL

Donors can be handed over. This results in an even work cycle achieved within the entire molding line.

As already indicated above, there is a pit under the press-out station arranged, in which there is a device for removing the waste sand is located. This device is generally designed as a belt conveyor. The inventive training at the expressing station with a Push-out cylinders that can be moved between the two head ends of the rubber belt conveyor opens up the possibility that the device leading away the waste sand consists of a there is a slide reaching to the bottom of the pit, which pushes the molding sand in one direction with every movement of the push-out cylinder pushes out of the pit. There is therefore no need for a separate conveyor for the waste sand. The conveying movement is determined by the travel movement of the Generated push-out cylinder, with the slide as a simple means of conveyance in the manner of a snow plow or the like. serves.

To avoid falling rubbish sand in the area behind the gate valve to avoid, on the displaceable ejection cylinder, a cover for the slide that follows the slide during its sliding movement Be arranged pit.

The ejector cylinder is advantageously seated on a rail-mounted one Car on which the slide and the cover are arranged.

According to a further advantageous embodiment is the Ejector cylinder largely within the pit in front of the slide. this has the advantage that the ejector cylinder is not considered to be more expensive Telescopic cylinder must be designed.

/ β

To remove the waste sand is provided according to a further feature of the invention He that below the narrow side of the rectangular path on the head side of the molding system and along one long side of the rectangular path up to the area of the press-out station with a pit a conveyor is arranged for transporting away the waste sand and that the bottom of the pit at the expressing station extends to above the waste sand conveyor on the long side of the rectangular path.

This makes the only two necessary waste sand pits about one relatively short pit connected to one long side. The one at the express station Any molding sand is passed through the pusher directly to the conveyor running in the pit on the long side.

The aforementioned embodiment is thereby developed in a preferred manner, that the waste sand conveyor immediately after the squeezing station out of the pit to above the level of the molds on the rubber belt conveyor out of the cooling section and a cross conveyor is arranged below its discharge end, which throws the waste sand onto the molds.

In contrast to the well-known molding plants, where the waste is sand - mostly in pits - until it is transported to the sand processing plant here the waste sand accumulating within the molding plant on the molds and with these to the unpacking station, where the largest amount of molding sand to be processed is produced anyway.

The invention is based on a preferred embodiment described, which is shown in the drawing. In the drawing demonstrate:

Figure 1 is a plan view of the molding plant;

FIG. 2 shows a section A-A according to FIG. 1;

FIG. 3 shows a section B-B according to FIG. 1

Figure 4 shows a section C-C according to Figure 1 and

FIG. 5 shows a section D-D according to FIG. 1.

As the plan view of Fig. 1 shows, the outline of the foundry molding plant essentially determined by an elongated rectangular path, which is made up of several sections with different functions composed. The core of every molding system is the molding machine, designated here as 1, which is located on the head side of the rectangular track is arranged within the same. It works together with a section 2 which forms a narrow side of the rectangular path and has two stations, of which station 3 is located in front of the molding machine within section 2 of the rectangular path, while the second station is located inside the molding machine. Above station 3 there is a stationary molding sand filling vessel 4, which is fed from a molding sand bunker 5 located next to the molding system via a conveyor 6. At station 3 and below the Conveyor track section 2 is a pressing unit 7, which is between the two stations is movable, directly above the pressure unit 7 is a model plate carrier 8 with model. This can be replaced by a different model by means of a model changing device 9 be replaced. For example, the model for the upper box and the lower box of a form are arranged next to one another. One work cycle

- 10 -

AS

runs so that the pressure unit 7 in the station 3 up against the model plate carrier moves, it follows on its further stroke at the top and against the one in station 3 on the conveyor track Box part, e.g. moves a lower box 10, also takes it along and presses it against the opening edge of the filling vessel 4. Possibly a filling frame can also be provided. After completion of the filling process, the pressure unit 7 with the lower box 10 lowered a little and driven into the molding machine in order to raise the lower box 10 again and against the compression unit to press. The molding sand can be compressed pneumatically, mechanically or in a combined manner. The molded lower box is retracted back into station 3 after lowering by the compaction unit, and then on section 2 in the direction of arrow 12 (Figure 1) to be transported further, for example, following an upper box 11 (Figure 4). The box parts 10, 11 reach one after the other a stripping device 13 in the manner of a plow, which scrapes off excess molding sand on the back of the mold. Immediately behind the Stripping device 13, a funnel drilling device 14 is arranged, which in several positions with respect to the shape can be brought.

This is followed by a turning station 15 in which the lower box is turned, so that the form is accessible from above, while the upper box is is already in the appropriate position.

Section 2 of the rectangular track is, as FIG. 4 shows in particular, arranged significantly above ground level such that the entire molding machine 1 can be set up at ground level. At the end of the section 2 and in the area of a corner of the rectangular path, a lowering device 16 is therefore arranged, which means that the molding box halves are at working level

lowers, as in the case of the upper box 11 shown at the bottom right Case is. In this area, as in section 2, the rectangular track is formed by on-board roller tracks. Get from the lowering device 11 the molding box halves on a core insertion section 17 on one long side of the rectangular web (Figure 1). The core insertion line 17 has several stations 18 for inserting cores, in particular in the lower box. The core insertion section 17 is followed by a loading device 19, by means of which the upper box 11 is raised, and after Moving under the lower box is lowered onto it. The complete molding box from a pallet trolley is attached to the loading device 19 taken over, which in turn is brought up by means of a trolley that can be moved on rails 21 (FIGS. 1 and 2). The pallet trolley with the complete molding box 22 then arrives on a railroad track 23, which makes up the largest part of one long side of the rectangular track and serves as a casting line 24. At the end of the casting section there is a brake cylinder 25 and a translation device 26, again in the form of a rail-mounted one Arranged carriage 26, which in turn has rails 27 for the pallet truck on the top. The pallet trolley with the molding box reaches the other long side of the rectangular track by means of this transfer device, where rails are again arranged, on which the pallet trolley is moved forward cyclically with a push cylinder 28 will. This section 29 of the rectangular path forms a first part of a cooling section on which the shape is still within of the molding box is located. The transported in the direction of arrow 30 Molding boxes arrive in the area of the molding machine 1 Another translation device 31, which consists essentially of a horizontal movable and raisable and lowerable gripper 32 (Figure 5). The molding box is lifted from the pallet trolley 20 by means of the gripper 32. The pallet trolley 20 passes over the one already described

- 12 -

Rail track 21 back to the loading device 19. In this way, the pallet circulation is closed.

The molding box 32 hanging in the gripper is in one of the two positions 33 or 34 driven, which are arranged directly next to one another and each of a rubber conveyor belt 35, 36 at the feed end.

Below these two positions 33, 34 there is a push-out cylinder 37 with push-out plate 38, which can be moved between the two positions by means of a carriage 39 (FIG. 5). When starting up The push-out plate 38 presses the mold out of the molding box 22 located in the corresponding position and brings the mold 40 onto the Level of one rubber belt conveyor 36 onto which the mold is then transferred. During the next work cycle, the carriage 39 moves the push-out cylinder 37 with push-out plate 38 into that shown in dash-dotted lines in FIG other position 33. In this way, only one rubber belt conveyor or alternately both rubber belt conveyors can be charged will. The rubber belt conveyors 35, 36 run in the direction of the arrow 41, that is, against the conveying direction on the first part of the cooling section 29 um and form the larger, second part of the cooling section, which is arranged directly next to the first part 29. The forms 40 arrive by means of the rubber belt conveyors 35, 36 to a delivery station 42, from which they are transferred to an unpacking station, e.g. a vibrating grate 43 to separate the casting from the molding sand.

To the press-out station, specifically at its position 34, includes Section 44 of the rectangular path, which the empty molding box in a Separating device 45 transferred, where upper box and lower box are separated from each other and successively fed to the station 3 in front of the molding machine 1

will. In doing so, the mold box halves, as FIG. 4 shows, are again raised from the normal level to the higher level, in that the cutting device has a correspondingly larger stroke.

In the area of section 2 on the narrow side of the rectangular path is a pit 46 is arranged in which under all work positions on this section a belt conveyor 47 rotates, which picks up the waste sand accumulating at these work positions and places it on a perpendicular to it running belt conveyor 53 passes. This runs in a short pit 48 on the long side of the rectangular track from the height of the separator 45 up to the height of the press-out station. Below the expressing station with the positions 33, 34 a pit 49 is also arranged, into which the Waste sand that accumulates when squeezing it arrives. To get this out of the pit 49 is to be challenged on the carriage 39 with the push-out cylinder37 and the push-out plate 38, a slide 50 is arranged, which except for the The bottom of the pit 49 is sufficient. Furthermore, a cover 51 is on the carriage 39 arranged to prevent the molding sand from falling into the space behind the Slide 50 prevented. When the carriage 39 moves from the dot-dash position to the solid position, the Slide 50 with the foundry sand in the pit. The pit 49 ends with an opening 52 immediately above that in the pit 48 Running belt conveyor 53J The belt conveyor 53 is immediately behind the expressing station upwards (Figure 3) and sand the waste onto a transverse conveying device, for example a chute 54, which ends above the molds 40 circulating on the rubber belt 36, and the waste sand throws off on these forms.

In a modification of the system described above, the first Part 29 of the cooling section is also used as an additional pouring section if, for example, the melt has to be poured quickly and completely, e.g. with nodular cast iron. this then happens when the system is at a standstill.

Blank page

Claims (13)

DR. ING. HANS LIC KT ί "'DIPL.-JN * C. HEINER LICHTI DIPL.-PHYS. DR. JOST LEMPERT PATENTANWÄLTE' D-7500 KARLSRUHE 41 (CROTZINCEN) · DUR LA CH ER STR. 31 (H OC HH AU S) TELEPHONE (0721) 48511 BMD. 6580 / 82- Lj Badische Maschinenfabrik Durlach GmbH. November 08, 1982 Pfinztalstrasse 90 D-7500 Karlsruhe 41 patent claims 1. Foundry molding plant with a molding machine in which the upper and lower boxes of a box shape are alternately produced, one the rectangular path incorporating the molding machine, which has a turning station for the molded lower case, a core insertion line, a loading station for the molded upper and lower case, a Expressing station for the complete form and a separating station from the the empty lower and upper boxes are successively fed to the molding machine, and with a casting and cooling section, characterized in that on a head side of the molding system that of a narrow side (2) the rectangular path is formed, the molding machine (1) and the turning station (15) are arranged, one perpendicular in the conveying direction (12) subsequent longer section of the rectangular track is the core insertion section (17), the feed station (19) and the casting line (24), while the other, parallel, longer section of the Rectangular track designed as a cooling section (29) and close to the form machine (1) is returned to the expressing station (33, 34), from which the molds (40) are transferred to a cooling section directly next to this lying further cooling section (35, 36) arrive with opposite conveying direction (41), while the empty molding box (44) with again in the opposite direction of conveyance via the separating station (45) to the molding machine (1). 2. Molding plant according to claim 1, characterized in that on the Head side of the molding system on the narrow side (2) of the rectangular path immediately in front of the molding machine (1) the separating station (45) and immediately a sand stripping and funnel drilling station (13, 14) is arranged behind the molding machine and in front of the turning station (15). 3. Molding plant according to claim 2, characterized in that the The narrow side (2) of the rectangular track on the head side of the molding system is arranged at such a high level that the molding machine (1) can be set up at floor level, and that the separating station (45) is arranged on this narrow side at one corner of the rectangular path and is equipped with a separating device which, when the empty molding boxes are separated, the difference between the normal level overcomes the rectangular track and the elevated level on its narrow side, while a lowering station on the opposite corner (19) is arranged for the molded upper and lower box (10, 11). 4. Molding plant according to one of claims 1 to 4, characterized in that that the second part of the cooling section, onto which the expressed forms (40) are delivered, is arranged at approximately the same level, like the section (2) at the head of the system Rectangular path. 5. Molding plant according to one of claims 1 to 4, characterized in that that the section of the rectangular path between the expressing station (33, 34) via the separating station (45), the molding machine (1), the lowering station (16) to the loading station (19) as the boxes (10, 11) directly receiving edge roller conveyor and the casting line (24) and the section (29) of the cooling section receiving the cast box shapes up to the express station (33, 34) as a pallet track are formed and that the press-out station on one long side of the rectangular track and the feed station (19) on the other Long sides facing each other and through a pallet transfer device (21, 26) are connected. 6. Molding plant according to one of claims 1 to 5, characterized in that that the end of the casting line (24) and the opposite Start of the cooling section (29) through a pallet transfer device (26, 27) are connected. 7. Molding plant, in particular according to one of claims 1 to 6, wherein the part of the cooling section following the press-out station takes at least two shapes next to each other, characterized in that, that this part of the cooling section consists of at least two adjacent, endless rubber belt conveyors (35, 36), the pressing station (33, 34) is arranged in front of the head side is, on which in turn an upward-acting Ausrückzyünder (37) is arranged, which between two positions (33, 34) in each case the head side of each rubber belt conveyor (35, 36) can be moved. -A- 8. Molding system, in particular according to claim 7, with a pit arranged under the pressing-out station and a pit arranged therein Device for removing the waste sand, characterized in that that the device consists of one on the movable push-out cylinder (37) arranged, to the bottom of the pit (49) reaching slide (50) consists of each movement of the ejection cylinder (37) in one direction (33 ', 34) the Pushing molding sand out of the pit (49). 9. Molding system according to claim 8, characterized in that on the movable ejection cylinder (37) one of the slide (50) at whose sliding movement trailing cover (51) is arranged for the pit (49). 10. Molding system according to one of claims 1 to 9, characterized in that the ejection cylinder (37) on a rail-mounted Carriage (39) sits on which the slide (50) and the cover (51) are arranged. 11. Molding plant according to one of claims 1 to 10, characterized in that that the ejection cylinder (37) is largely within the pit (49) in front of the slide (50). 12. Molding system, in particular according to one of claims 1 to 11, characterized in that below the narrow side (2) of the Rectangular track on the head side of the molding system and along one long side of the rectangular track up to the area of the press-out station (33, 34) a pit (46, 48) with a conveyor (47, 53) is arranged to transport away the waste sand and that the bottom of the pit (49) at the pressing station (33, 34) to above the waste sand conveyor (53) on the long side of the Rectangular path "right. 13. Molding plant according to one of claims 1 to 12, characterized in that that the waste sand conveyor (53) immediately after the pressing station (33, 34) from the pit (48) out to above the level of the molds (40) on the rubber belt conveyor (35, 36) the cooling section and a cross conveyor (54) is arranged below its discharge end, which the waste sand on the molds (40) throws off.