EP0268656B1 - Procede pour fabriquer des moules et des parties de moules a des fins de fonderie, notamment pour fabriquer des noyaux, et installation permettant la mise en uvre du procede - Google Patents

Procede pour fabriquer des moules et des parties de moules a des fins de fonderie, notamment pour fabriquer des noyaux, et installation permettant la mise en uvre du procede Download PDF

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Publication number
EP0268656B1
EP0268656B1 EP87903870A EP87903870A EP0268656B1 EP 0268656 B1 EP0268656 B1 EP 0268656B1 EP 87903870 A EP87903870 A EP 87903870A EP 87903870 A EP87903870 A EP 87903870A EP 0268656 B1 EP0268656 B1 EP 0268656B1
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EP
European Patent Office
Prior art keywords
core
box
partial
joining
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP87903870A
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German (de)
English (en)
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EP0268656A1 (fr
Inventor
Herbert Schilling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eb Bruehl Aluminiumtechnik Te Bruehl Bondsre GmbH
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Eisenwerk Bruehl GmbH
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Application filed by Eisenwerk Bruehl GmbH filed Critical Eisenwerk Bruehl GmbH
Priority to AT87903870T priority Critical patent/ATE47542T1/de
Publication of EP0268656A1 publication Critical patent/EP0268656A1/fr
Application granted granted Critical
Publication of EP0268656B1 publication Critical patent/EP0268656B1/fr
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/103—Multipart cores

Definitions

  • the invention relates to a process for the production of molds and molded parts for foundry purposes, in particular for the production of cores which are assembled from at least two core parts and are firmly connected to one another, the individual core parts in molding machines operating independently of one another in a core box consisting of at least two partial boxes are formed for themselves, whereby after the completion of the molding process of the individual core parts, the core box is opened so that the core part remains connected to a partial box, then the core parts to be joined are joined together by a defined relative movement of the partial boxes and each time after the joining together, first of all Part box solved and then the assembled core is ejected from the other part box, as well as a device for performing the method.
  • core in the sense of this application is to be understood as meaning once assembled molded parts which are placed in a casting mold and solve cavities, undercuts and similar problem areas of the casting mold design on the finished casting, that is to say foundry cores in the conventional sense.
  • the term in the sense of the present invention also includes the casting mold itself, which is composed of several parts, but which are produced from the same molding material and according to the same process as foundry cores; depending on the shape of the casting to be created, both the inner wall and / or the outer wall of the casting can be limited by the composite "core parts".
  • composite cores have been produced by shaping the individual core parts, removing them from the core mold and temporarily storing them, and then assembling them by hand.
  • the fixed connection between the individual core parts was carried out either by screwing or by frictional engagement via conical pins and conical receptacles each arranged on the core parts, a corresponding pressing pressure having to be applied.
  • the complete core thus firmly assembled was then placed on a conveying means, for example a pallet, and then blackened by dipping for certain applications using a corresponding device, the excess of the dipping liquid being thrown off here.
  • This method is very time-consuming and also has the disadvantage that the depositing and resuming of the individual core parts between the individual production stages exposes them to unnecessary stresses, which lead to chipping or abrasion, which leads to dimensional deviations, misalignment of the core parts can lead to each other, columns or the like.
  • the result of this is that the castings produced with such cores have to be reworked with a considerable amount of work, in particular burrs arising from offset or gaps on the casting, which burrs have to be removed at least in the areas which are no longer in the subsequent mechanical processing of the casting to be edited.
  • these areas are sometimes very difficult to access, so that the removal of casting burrs is very labor-intensive.
  • the invention is based on the object of improving the process for the production of molds and moldings for foundry purposes, in particular for the production of cores which are composed of a plurality of core parts which are to be firmly connected to one another, so that more complicated cores which are composed of a plurality of core parts are produced by machine and can be put together, as well as a higher dimensional accuracy and better shape accuracy is achieved.
  • This output is achieved with the method according to the invention in that the part box (base part box) of a core part defined as the base core part remains connected to it as a carrier and centering element, detached from the molding machine and successively to carry out the subsequent joining operation to the respectively opened core box of the next, move the core part to be added and to carry out the joining operation is moved against the core part still held in a partial box and picks it up and releases it from its partial box, and so on all other core parts are assembled by assembling on the base core part and then the complete core is ejected from the base part box serving as a carrier element.
  • the particular advantage of the method according to the invention is that after the molding process has been completed, the individual core parts are not completely detached from their core boxes, but remain connected to a partial box and are joined together by relative movement of the partial boxes holding them. Since the geometrical assignment required for the assembly and the resulting relative movement of the core parts to be joined to one another is effected by the corresponding alignment and movement of the part boxes to one another, the joining process can be carried out with great precision, since the core parts held in their part box have a spatial orientation , which would never be achieved again after a complete molding.
  • the advantage is taken of the fact that the basic part box provides a defined and thus reproducible geometric alignment can be maintained so that the individual core parts can be assembled with great precision.
  • the mutually associated contact surfaces of the individual core parts are not subject to any wear during the transport processes, so that they lie precisely with one another both with their surfaces and with their edges, so that neither gaps nor offset edges can form.
  • Such cores composed of a plurality of core parts can also be firmly connected to one another in a wide variety of ways, depending on the geometric shape of the core, it being possible to use the most varied of connection methods.
  • So core parts can both frictionally, d. H.
  • Conical pins on one core part and conical recesses in the other core part can be used in the same way as adhesive connections or screw connections.
  • the method according to the invention has the advantage that, due to the precisely defined joining movement, the conical pins are not subjected to abrasion on one side, but the surfaces forming the frictional connection practically only immediately before the core parts are in contact touch each other and be pressed against each other.
  • the invention further relates to a device for carrying out the method, with at least two core molding machines for producing core parts, each having a core box composed of at least two partial boxes.
  • the device is designed according to the invention in such a way that at least one partial box (basic partial box) is connected to at least one core molding machine with a moving device that connects the core molding machine to at least one joining station, that the joining station is provided with a centering device for the basic partial box to be moved and an ejection device for the core part to be joined together with the base core part is provided.
  • the centering device for the base part box With the help of the centering device for the base part box, this is given a precisely defined position in space, in which it can then be brought together with the other part box, which contains the core part to be added.
  • the joining movement can consist in a pure translational movement, so that the joining device can essentially be formed by a pneumatic or a hydraulic cylinder.
  • the joining device is to be designed such that a superimposition of at least two translational movements, but possibly also the superimposition of translational movements and rotation movements can be performed to insert the core part into the core part held in the base part box.
  • a plurality of basic part boxes are then to be provided in the device, which are to be guided in the circuit between the associated molding machine and the joining station or stations, so that the individual core molding machines of the device can work largely in unison.
  • the joining device has holding and centering elements both for the base part box and for the part box with the core part to be added, which engage with one another during the relative movement of the two part boxes and are dimensioned such that the centering elements are in engagement with one another, before the core parts are put together.
  • the holding and centering elements can be part of the joining device and center both part boxes relative to one another before the joining movement begins.
  • the holding and centering elements are arranged directly on the partial boxes, so that the partial boxes to be brought together center themselves regardless of the structure of the joining device. This allows the basic part box to be moved freely.
  • the joining device is formed in each case by the subsequent core molding machine, the open, unfilled part box serving in each case as a receptacle for the base part box.
  • This has the advantage that the existing precision of the core molding machine can also be used for the joining operation when opening and closing the two associated sub-boxes.
  • the base part box is opened, ie. H. unfilled part of the core molding machine fed and picked up by this.
  • the base part box with its core part which can also be assembled from previous joining operations, is then guided against the other part box of the core molding machine, which holds the core part to be added and is joined to it.
  • the base part box After detaching the attached core part from its part box, for example by means of an ejector, the base part box is then lowered again via the normal opening movement and can then be picked up again by the moving device and transported freely to the next core molding machine acting as a joining station.
  • the base part box on its mold cavity side and on its side facing away from the mold cavity and in each case the core box halves for the core part to be added to the core molding machine serving as a joining device each have corresponding centering elements on the mold cavity side.
  • the partial boxes center each other, so that the precision of the joining device is not the only decisive factor, be it a separate joining device or a core molding machine acting as a joining device.
  • the centering can be checked and reworked each time the partial boxes are revised. It is advantageous here if the centering elements are designed as centering pins on one side of the box and as recesses on the other side of the box.
  • the centering pin is held longitudinally displaceably in the partial box against a compression spring element and is designed to be tapered at its free end. This ensures that when the partial boxes are brought together, they are first centered against each other and only then does the partial box move relative to one another. This also makes it possible to design the guide for the centering pin with a high quality of fit, since because of the previous centering there is no longer any risk of tilting, especially since the movement is essentially carried out by the core molding machine, which is designed for precise guidance of the part boxes.
  • the conical design of the free pin end in particular if, according to a further embodiment of the invention, the recess in the partial box for receiving the centering pin is designed to taper from the opening area, the "threading" of the centering pin into the recess of the other partial box is simplified, especially practical small transverse forces can be exerted between the two parts without longitudinal movement of the centering pin.
  • the device is designed in such a way that the parting plane of the mold boxes of the individual core molding machines is oriented essentially horizontally, the base part box also being moved in this orientation, it is not only ensured that the core package, which is gradually built up on the base part box also cannot be detached from the base part box due to any vibrations during the process.
  • a reliable "automatic" locking is achieved during the movement sequences during the joining operation.
  • the longitudinally displaceable centering pins are each arranged facing downward on the part boxes of the core molding machine and on the base part boxes. This prevents detached molding material particles from getting into the pin guides. Is expedient it occurs when the recess has an opening that extends through to the outside in its base region. This ensures that no mold material particles falling away from the core parts can collect in the upwardly open recesses.
  • the process sequence is first explained in a simplified manner using the example of a two-part core which, for a casting with internal undercuts, has to be composed, for example, of two core parts. Accordingly, the two necessary core parts for such a core are produced with the help of two core molding machines 1 and 11, which are shown in the flow diagram in accordance with FIG. Fig. 1 are indicated only schematically by their core boxes 3 and 4.
  • the core molding machines are of conventional design and work, for example, in a core molding process with activation of the binder by introducing a catalytically active gas into the closed mold filled with molding material, for example core sand.
  • the core boxes 3 and 4 are opened; H. the sub-boxes 3 "and 4" are lifted off so that the core parts 5 and 6 each remain connected by their liability to the sub-boxes 3 'and 4'.
  • the sub-box 3 is moved with the aid of a displacement device 7, which is only shown in the flow diagram by the strongly drawn arrow, into a joining station 8 and is fixed and centered there with fixing devices (not shown in more detail), for example hydraulically or pneumatically actuated clamping claws.
  • fixing devices for example hydraulically or pneumatically actuated clamping claws. It practically depends on the shape of the core part, the orientation of its dividing line and its core marks, whether the centering and fixing in the joining station 8 takes place in a horizontal orientation, as shown, or in another orientation, for example inclined or vertical.
  • the sub-box 4 'with the core part 6 is also moved via a moving device 9 to the joining station 8 in such a way that the sub-box 4' is positioned exactly vertically above the sub-box 3 'in the joining station.
  • the sub-box 4 'with the core part 6 is then lowered onto the sub-box 3' with the core part 5 and a joint between the two core parts is then via a joining device 10, which can be arranged stationary or can also be connected to the movable part of the displacement device 9. Since the assembled core is continued with the partial box 3 'after the joining operation, this forms the basic partial box.
  • Rigid guide elements 11, for example guide rods, guide pins or the like, which are either permanently connected to the receptacle of the joining station 8 or can also be permanently connected to the partial box 3 'serving as the basic part box, is now taken care of when lowering the Sub-box 4 'with the help of the joining device 10, the core part 6 is added in an exact geometrical orientation to the core part 5, wherein depending on the shape of the core parts and also the core marks assigned to one another, the guide elements 11 can be provided with stops which make the joining movement in the direction of the base part box limit.
  • the now inserted core part 6 is detached from its partial box 4 'via an ejection mechanism of a known type, and the partial box 4' is raised again and returned to the core molding machine 2 via the displacement device 9.
  • the fixed connection between the assembled core parts can now be made by frictional engagement, for example by conical pins on one core part and correspondingly assigned conical recesses on the other core part, so that both core parts are firmly connected to one another by the joining movement solely by pressing the pins into the recesses.
  • the fully assembled core can now be ejected from the base part box 3 'and transported away immediately after the part box 4' has been lifted off by means of an ejection mechanism of a known type.
  • the base part box 3 ′ can be moved back into the core molding machine 1 via the moving device 7 and the next molding process can take place.
  • the two core parts are firmly connected to one another in the usual way with the aid of special screws.
  • the screwing can be carried out by hand with a pressure run or with electric screwdrivers in the joining station 8 before ejection.
  • the finished core 5/6 can now be ejected from the base part box 3 'via ejector 15 within the screwing station 13 or also in a downstream transfer station 14, picked up by a gripper element 16 and fed to the further production process.
  • a larger number of base part boxes 3 ' must be provided in a workflow in which a base part box 3' passes through several stations before the finished assembled core is ejected cycle through.
  • the structure and sequence of the individual work cycles of the device explained with reference to FIG. 1 is now essentially dependent on the size and shape of the core parts to be joined. It can easily be seen that here, for example, a plurality of core molding machines can be arranged in a star or beam shape around the joining station 8 if, for example, more than two core parts are to be joined together.
  • FIG. 2 shows in the form of a flow diagram a process sequence modified from FIG. 1 for a core composed of three core parts. It can be seen from the following description that this process sequence is particularly suitable for the precise assembly of a large number of core parts to form a core package. For the sake of simplicity, however, the process sequence is only described for the example of a core package composed of three core parts.
  • the device has three core molding machines 1, 11 and 111, in which the core parts A, B and C are formed.
  • the core boxes are each formed by the partial boxes 3 ', 3 "of the core molding machine I and B4', B4" as well as C4 'and C4 "of the core molding machine II and 111.
  • the core part A forms the basic core part, so that the partial box 3' accordingly Forms base part box, which is detachably connected to the core molding machine and can be moved within the device using a traversing device, not shown in detail, here represented by the strongly drawn arrows.
  • the part boxes B4 "and C4" are each fixed with their associated core molding machine II or 111 connected.
  • the base part box 3 ' is picked up by the moving device and moved to the core molding machine II.
  • the core part B is already shaped, so that the core box opens and the sub-box B4 "is moved downwards so far that the base part box 3 'can move into the core box 4 thus opened.
  • the core part B to be added is here by the Sub-box B4 '.
  • the core box B4 is closed, so that the base box 3' located above it is received centering by the sub-box B4 "and is guided with its core part A against the core part B in the sub-box B4 'until the core part B and the Core part A are assembled in the manner described above.
  • the core part B is then released from the part box B4 'by means of an ejection mechanism in the part box B4', which is not shown here, so that when the part box B4 "is lowered, the now assembled part package can be moved back down to the travel position 'Move from the moving device into the now opened part box C4' of the core molding machine 111, in which the core package is completed in the same way by adding the core part C in the manner described above.
  • the base part box 3 'with the now completely assembled core package then becomes an ejector 15 and then released from the base part box 3 'and fed to the casting station.
  • the now empty base part box 3' is returned via the traversing device back to the core molding machine I.
  • the method and thus also the devices described on the basis of the flow diagram according to FIGS. 1 and 2 can be modified in such a way that, for example in the case of a core composed of four parts, in each case in a joining operation as described in FIG. 1, two Core parts are assembled and then one of the core parts assembled from two core parts are then moved in the same way with the partial box previously used as the basic part box in a final assembly and are assembled there via this basic part box with the basic part box of the other core part package.
  • each core part can be manipulated in a targeted manner via the part shape connected to it, intermediate operations can also be provided for individual part forms in this workflow. For example, areas or edges of the core that are particularly at risk during the casting process can be provided with a black coating by spraying or brushing. Due to the spatial assignment clearly defined via the connection to the partial shape, this process can also be carried out mechanically.
  • Fig. 3 shows a section as an application example of a rotationally symmetrical, bowl-shaped casting 17 with a plurality of undercuts.
  • the mold required for this, including the cores, cannot be made from one piece, but rather has to be assembled from four core parts.
  • FIG. 4 The joining operation is now shown in FIG. 4 in the four individual steps a) to d).
  • a device as described with reference to FIG. 2 is used for the production, but here a total of four core molding machines are used instead of three core molding machines.
  • the sectional view in FIG. 4 a) shows the production of the base core part 19 with the aid of a core shape which is divided into a lower part U1 and an upper part 01.
  • the base core part 19 remains in the lower mold U1, which at the same time represents the base part box, which is used for fixing and centering in all subsequent joining operations.
  • the base part box U1 is now moved to the subsequent core molding machine 11 and geometrically precisely fixed there.
  • the core part 19 is thus also geometrically precisely aligned in space.
  • the base core part 19 is brought up to the core part 20 to be added, which is connected to its partial form 02, and joined together, the pin 22 of the core part 20 being inserted into the recess 21 in the core part 19.
  • guide pins 23 on the base part box U1 engage in the part box 02, so that regardless of any alignment errors in the closing movement of the core molding machine 11, the two part boxes and thus the two core parts are inserted exactly into one another.
  • the core parts 24 and 25 are then inserted in steps c) and d) in the same way, the connection of the individual cores to one another again taking place via corresponding conical pins. Since the individual core parts must be firmly connected to one another to form the overall core, this can be done, for example, by means of an adhesive connection or a frictional connection in the region of the conical pins.
  • the complete casting mold is then ejected from the base part box U1 via an ejector device, not shown, of conventional design and can then be removed for the further manufacturing process.
  • the base part box U1 is then, as shown in FIG. 2, returned to the associated core molding machine I via a corresponding conveyor.
  • the joining operation shown and described can also be carried out in such a way that the base part box U1 is opened once and all associated other part boxes 02, 03 and 04 are successively guided to a joining station. After each joining operation, the base part box U1 can also be carried out by one cycle to a correspondingly multi-part, separate joining station, so that always several part cores are joined together at the same time.
  • the outer mold can now be produced from the same molding material used for the production of the cores and by the same method. Since the actual core and the outer mold are produced from the same molding material and in the same process, that is to say with the same accuracy and the same strength properties, the outer mold and the core can now also be joined in accordance with the process according to the invention.
  • the division of core and outer shape can be so be made that parts of the outer shape and parts of the core are alternately joined together when joining in successive joining operations.
  • the upper box B4 ' is provided on the mold trough side with centering pins 26 which are held in the partial box B4' against a compression spring element 27 so as to be longitudinally displaceable.
  • the guide of the centering pin 26 can be designed in a high-quality, play-free fit, since molded sand parts cannot get into the guide above.
  • the free end 28 of the guide pin 26 is tapered.
  • the movable base part box 3 ' is provided on its underside facing away from the mold cavity in the same way with centering pins 26 which are longitudinally displaceable against a compression spring element 27 and which are likewise conical at their free end 28.
  • the centering pin 26 of the base part box 3 ' can be made shorter here, since the base part box 3' only ever on the open, ie. H. empty lower sub-box B4 ".
  • the centering pins 26 on the upper sub-box B4 ' must be made longer, since here the height of the base core part A and the height of the core part B to be added as well as a minimum space for the centering movement described in more detail below must be available .
  • the tapered recesses 29 are each in their bottom area with an outward through opening 30 provided so that falling into the recess 29 molding sand particles can not accumulate in the recess and thus trouble-free operation is guaranteed over a long period of operation.
  • the base part box 3 'fed via the moving device is now initially received by the lower part box B4 "which moves in the closing direction (arrow 31), the conical ends 28 of the centering pins 26 initially engaging in the recesses 29 and centering the base part box 3' exactly the further course of the movement, the centering pins 26 are pressed in against the force of the compression spring element 27 until the base part box 3 'rests on the dividing surface of the part box B4 "and is lifted from the moving device in the further course of the closing movement and is guided against the upper part box B4'.
  • the centering pins 26 are then pressed in, the closing movement being carried out until the two core parts A and B are joined together in the intended manner.
  • the movement in the opening direction (arrow 32) is initiated so that the base part box 3 'with the core part B now firmly attached to the core part A is lowered, if necessary after actuation of an ejection mechanism not shown here on the part box B4 ".

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Abstract

Procédé pour produire des noyaux de fonderie, qui sont composés d'au moins deux éléments de noyaux et sont solidement reliés les uns aux autres. Les éléments de noyau individuels (A, B, C) sont formés dans un moule à noyau constitué d'au moins deux parties de moule (3', 3'', B4', B4'', C4', C4''). Après achèvement du moulage des éléments de noyau individuels, le moule à noyau est ouvert de telle manière que l'élément de noyau demeure lié à une partie de moule (3', B4', C4'), après quoi, les éléments de noyau individuels qui doivent être assemblés sont amenés avec leurs parties de moule dans une position de montage et, par des mouvements relatifs définis des parties de moule, sont assemblés les uns aux autres, et après l'assemblage, une première partie de moule est d'abord dégagée et ensuite le noyau assemblé est ejecté de l'autre partie de moule.

Claims (15)

1. Procédé pour fabriquer des moules et des parties de moule à des fins de fonderie, notamment pour fabriquer des noyaux qui sont composés d'au moins deux plusieurs parties de noyau à assembler solidairement entre elles, selon lequel on moule séparément les différentes parties de noyau dans des machines à mouler (1, 2) fonctionnant de manière indépendante l'une de l'autre, chaque partie de noyau dans un châssis à noyau (3, 4) constitué d'au moins deux châssis partiels (3', 3"; 4', 4"), tandis que, une fois que l'opération de moulage de chacune des différentes parties de noyau (5, 6) est terminée, on ouvre son châssis de noyau de façon telle que cette partie de noyau reste solidaire de l'un des châssis partiels, puis, par un déplacement relatif défini des châssis partiels (3', 4'), on assemble entre elles les parties de noyau à réunir et, après cet assemblage, on sépare tout d'abord de l'un (4') des châssis partiels le noyau assemblé (5, 6), puis on l'expulse de l'autre châssis partiel (3'), caractérisé en ce qu'on laisse subsister, solidaire d'une partie de noyau définie comme étant une partie de noyau de base (5), le châssis partiel (3') (châssis partiel de base) de cette partie de noyau, châssis partiel qui sert d'élément de support et de centrage, on le sépare de la machine à mouler et, de manière successive, en vue d'exécuter l'opération suivante d'assemblage jointif, on le transfère jusqu'au châssis de noyau ouvert associé de la partie suivante de noyau à appliquer en vue de son assemblage et on le déplace contre la partie de noyau encore maintenue dans un châssis partiel (4'), pour qu'il s'y loge, de façon à réaliser l'opération d'assemblage jointif, puis on le sépare de son châssis partiel, et on monte ainsi toutes les autres parties de noyau (6) par assemblage sur la partie de noyau de base (5), puis on expulse ensuite le noyau complet (5, 6) hors du châssis partiel de base (3' ) servant d'élément de support.
2. Procédé suivant la revendication 1, caractérisé en ce que, le châssis de noyau étant ouvert, le châssis partiel ouvert (B4', C4') prévu pour la partie de noyau (B, C) à appliquer en vue de son assemblage reçoit à chaque fois le châssis partiel de base (3') et en ce que l'opération d'assemblage jointif s'effectue grâce au mouvement de fermeture de ce châssis de noyau, tandis qu'ensuite, grâce à un mouvement de retour du châssis partiel ouvert (B4', C4'), le châssis partiel de base (3'), avec les parties de noyau (A, B, C) assemblées, se trouve libéré pour le poursuite du transfert.
3. Procédé suivent l'une des revendications 1 et 2, caractérisé en ce que les différentes parties de noyau (A, B, C) sont rendues solidaires à demeure entre elles lors de l'assemblage.
4. Procédé suivant l'une des revendications 1 et 2, caractérisé en ce que les parties de noyau (A, B, C) ne sont rendues solidaires à demeure entre elles qu'après l'assemblage complet.
5. Procédé suivant la revendication 4, caractérisé en ce que la solidarisation du noyau assemblé complet s'effectue notamment par vissage.
6. Installation pour la mise en oeuvre du procédé suivant les revendications 1 à 5, comprenant au moins deux machines à mouler les noyaux (1, 11) qui permettent de fabriquer des parties de noyau et qui comportent chacune un châssis de noyau (3, 4) composé d'au moins deux châssis partiels (3', 3"; 4', 4"), caractérisée en ce qu'au moins un châssis partiel (châssis partiel de base 3') d'au moins l'une (1) des machines mouler les noyaux coopère avec un dispositif de transfert (7) qui réunit cette machine à mouler les noyaux (1) à au moins un poste d'assemblage jointif, en ce que ce poste d'assemblage jointif (8) est pourvu d'au moins un dispositif de centrage (11) pour le châssis partiel de base (3') à transférer et en ce qu'il est prévu un dispositif d'expulsion (10) pour la partie de noyau qui est à chaque fois à assembler à la partie de noyau de base.
7. Installation suivant la revendication 6, caractérisée en ce que le dispositif d'assemblage jointif (8) comprend, tant pour le châssis partiel de base (3') que pour le châssis partiel (4") comportant la partie de noyau à appliquer en vue de son assemblage (6, B), des éléments de maintien et de centrage (11; 26, 29) qui s'engagent les uns dans les autres lors du mouvement relatif des deux châssis partiels (3', 4") et sont dimensionnés de façon telle que ces éléments de centrage (11; 26, 29) viennent en prise les uns avec les autres avant que les parties de noyau ne soient assemblées.
8. Installation suivant la revendication 7, caractérisée en ce que le dispositif d'assemblage jointif soit constitué à chaque fois par la machine à mouler les noyaux (II, III) qui suit, le châssis partiel ouvert et non rempli (B4", C4") servant à chaque fois d'élément de réception pour le châssis partiel de base (3').
9. Installation suivant l'une des revendications 6 à 8, caractérisée en ce que le châssis partiel de base (3'), sur sa face à cavité de moulage et sur sa face opposée à la cavité de moulage, et chacune des deux moitiés de châssis de noyau prévues pour la partie de noyau (B, C), à appliquer en vue de son assemblage, de la machine à mouler les noyaux (11, III) servant de dispositif d'assemblage jointif, sur la face de la cavité de moulage pour chacune, comprennent des éléments de centrage (26, 29) correspondant entre eux.
10. Installation suivant la revendication 9, caractérisée en ce que les éléments de centrage sont réalisés sur une face du châssis partiel sous forme de tétons de centrage (26) et sur l'autre face de ce châssis partiel sous forme d'évidements (29).
11. Installation suivant la revendication 10, caractérisée en ce que chacun des tétons de centrage (26) est maintenu mobile en translation dans le châssis partiel à l'encontre d'un élément élastique (27) travaillant à la compression et est réalisé avec une forme conique à son extrémité libre (28).
12. Installation suivant la revendication 10 ou 11, caractérisée en ce que l'évidement (29) prévu dans le châssis partiel (3', 4") pour recevoir l'extrémité (28) du téton de centrage est réalisé avec une forme conique à partir de la zone de son ouverture.
13. Installation suivant la revendication 12, caractérisée en ce que le logement (29) comporte, dans la zone de son fond, une ouverture (30) traversant vers l'extérieur.
14. Installation suivant l'une des revendications 6 à 13, caractérisée en ce que le châssis partiel de base est muni de moyens permettant d'expulser le noyau complet.
15. Installation suivant l'une des revendications 6 à 14, caractérisée en ce que le plan de joint des châssis de moulage est orienté, pour les différentes machines mouler les noyaux (1, II, III), d'une manière essentiellement horizontale.
EP87903870A 1986-06-04 1987-05-27 Procede pour fabriquer des moules et des parties de moules a des fins de fonderie, notamment pour fabriquer des noyaux, et installation permettant la mise en uvre du procede Expired EP0268656B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87903870T ATE47542T1 (de) 1986-06-04 1987-05-27 Verfahren zur herstellung von formen und formteilen fuer gie ereizwecke, insbesondere zur herstellung von kernen, und einrichtung zur durchfuehrung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863618703 DE3618703A1 (de) 1986-06-04 1986-06-04 Verfahren zur herstellung von kernen fuer giessereizwecke und einrichtung zur durchfuehrung des verfahrens
DE3618703 1986-06-04

Publications (2)

Publication Number Publication Date
EP0268656A1 EP0268656A1 (fr) 1988-06-01
EP0268656B1 true EP0268656B1 (fr) 1989-10-25

Family

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Application Number Title Priority Date Filing Date
EP87903870A Expired EP0268656B1 (fr) 1986-06-04 1987-05-27 Procede pour fabriquer des moules et des parties de moules a des fins de fonderie, notamment pour fabriquer des noyaux, et installation permettant la mise en uvre du procede

Country Status (5)

Country Link
US (1) US4809763A (fr)
EP (1) EP0268656B1 (fr)
JP (1) JPH074645B2 (fr)
DE (2) DE3618703A1 (fr)
WO (1) WO1987007543A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4006176A1 (de) * 1990-02-28 1991-09-05 Hottinger Adolf Masch Verfahren und vorrichtung zum herstellen von kernen fuer giessereizwecke
DE4211130A1 (de) * 1992-04-03 1993-10-07 Bruehl Aluminiumtechnik Verfahren zum Gießen eines Kraftfahrzeugrades aus Metall sowie nach dem Verfahren hergestelltes Kraftfahrzeugrad
JP2943674B2 (ja) * 1994-12-26 1999-08-30 トヨタ自動車株式会社 中子成形方法
DE19540023A1 (de) * 1995-10-27 1997-04-30 Bruehl Eisenwerk Verfahren zum Einbringen von Kernen in eine Gießform
US5785107A (en) * 1995-12-29 1998-07-28 Georg Fischer Disa, Inc. Apparatus and method for producing multiple cores
US5787957A (en) * 1996-06-28 1998-08-04 Georg Fischer Disa, Inc. Apparatus and methods for injecting and gassing of sand
DE19833598A1 (de) * 1998-07-25 2000-02-24 Mann & Hummel Filter Werkzeug insbesondere zum Herstellen von Kernen
US6527039B2 (en) * 2001-06-11 2003-03-04 General Motors Corporation Casting of engine blocks
DE102005039493A1 (de) * 2005-08-18 2007-02-22 Eisenwerk Brühl GmbH Giesskernanordnung für ein Gusswerkstück
DE102006017922A1 (de) * 2006-04-18 2007-10-25 Audi Ag Formblock für den Serienguss von Werkstücken

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Publication number Priority date Publication date Assignee Title
US2624084A (en) * 1948-10-21 1953-01-06 John R Row Mold and coremaking machine
GB1057547A (en) * 1964-06-19 1967-02-01 Henry Wallwork And Company Ltd Cored foundry moulds
DE1253415B (de) * 1965-08-04 1967-11-02 Rheinstahl Eisenwerk Hilden Ag Verfahren zum Herstellen zweiteiliger Hohlkerne nach dem Schiessverfahren mit Heisskernkaesten
DE1558391B1 (de) * 1967-05-05 1971-03-18 Fritz Winter Ohg Verfahren und vorrichtung zum setzen eines gruenkerns in eine giessform
US4079774A (en) * 1973-06-25 1978-03-21 Dansk Industri Syndikat A/S System for making sand molds each having associated therewith a core member
US4278123A (en) * 1979-03-12 1981-07-14 Acme-Cleveland Corporation Simplified foundry core making machine and method
DE3200193A1 (de) * 1982-01-07 1983-07-14 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren zur herstellung eines hohlen giessereikerns

Also Published As

Publication number Publication date
WO1987007543A1 (fr) 1987-12-17
JPH01500021A (ja) 1989-01-12
JPH074645B2 (ja) 1995-01-25
DE3618703A1 (de) 1987-12-10
EP0268656A1 (fr) 1988-06-01
US4809763A (en) 1989-03-07
DE3760849D1 (en) 1989-11-30

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