ES2560777T3 - Device and procedure to unmold and release mold castings - Google Patents
Device and procedure to unmold and release mold castings Download PDFInfo
- Publication number
- ES2560777T3 ES2560777T3 ES09170147.4T ES09170147T ES2560777T3 ES 2560777 T3 ES2560777 T3 ES 2560777T3 ES 09170147 T ES09170147 T ES 09170147T ES 2560777 T3 ES2560777 T3 ES 2560777T3
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- Prior art keywords
- molding
- sand
- air
- container
- unraveling
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
- B22D29/001—Removing cores
- B22D29/006—Removing cores by abrasive, water or air blasting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
Abstract
Dispositivo (1) para desmoldear y el desarenar piezas (7) de fundición en molde fundidas en arena (8) de moldeo y en cajas (6) de moldeo, que comprende un recipiente (2) de aire a presión, una base (3) permeable a aire y a arena y un recipiente (4) colector, caracterizado porque el recipiente (2) de aire a presión posee un orificio, que se corresponde con la superficie de la sección transversal de la caja (6) de moldeo y que con un medio (12) de hermetización se dispone directamente por encima de la superficie de arena.Device (1) for unmolding and unraveling parts (7) of cast iron in molten sand (8) of molding and in boxes (6) of molding, comprising a container (2) of pressurized air, a base (3 ) permeable to air and sand and a collector container (4), characterized in that the pressurized air container (2) has a hole, which corresponds to the surface of the cross section of the molding box (6) and which with a sealing means (12) is arranged directly above the sand surface.
Description
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DESCRIPCIONDESCRIPTION
Dispositivo y procedimiento para desmoldear y desarenar piezas de fundicion en moldeDevice and procedure to unmold and release mold castings
El invento se refiere a un dispositivo para desmoldear y desarenar piezas de fundicion en molde fundidas en arena de moldeo y en cajas de moldeo, que comprende un recipiente de aire a presion, una base permeable a aire y a arena y un recipiente colector.The invention relates to a device for unmolding and unraveling cast iron castings in molding sand and molding boxes, comprising a pressurized air container, an air and sand permeable base and a collecting container.
En la fundicion son coladas las piezas de fundicion en molde, en especial las piezas de fundicion en molde de hierro fundido, en moldes de arena. En una caja de moldeo, que se compone de una mitad superior y de una mitad inferior de la caja, se conforma en la arena un molde hueco en el que se vierte el metal lfquido. Cuando la pieza de fundicion en molde debe poseer cavidades huecas, se introducen machos en el molde hueco antes del proceso de colada. Despues del proceso de colada es preciso librar las de fundicion en molde o las piezas de fundicion en molde de la arena de moldeo y de los machos. Para desmoldear las piezas de fundicion en molde se utilizan dispositivos de vibracion o de sacudida y/o dispositivos, que eliminan la arena con chorros de agua. A continuacion todavfa es necesario desarenar la pieza de fundicion en molde.In the foundry, cast iron castings, especially cast iron cast iron castings, are cast in sand molds. In a molding box, which consists of an upper half and a lower half of the box, a hollow mold is formed in the sand in which the liquid metal is poured. When the mold casting must have hollow cavities, males are introduced into the hollow mold before the casting process. After the casting process, mold casting or mold casting parts must be released from the molding sand and the males. To unmold the cast iron parts, vibration or shaking devices and / or devices are used, which remove the sand with water jets. Then it is still necessary to release the cast iron part.
A traves del documento CH 640 159 A5 se conocen un procedimiento y una instalacion para la eliminacion en humedo de la arena. El conjunto de moldeo es depositado sobre una parrilla giratoria y se chorrea con una tobera de chorro de agua con una presion de hasta 800 bar. El chorro de agua puede tener como consecuencia la formacion de grietas en la piezas de fundicion en molde. La eliminacion en humedo de la arena solo puede ser aplicada de manera rentable, cuando el agua y la arena pueden ser utilizadas nuevamente de una manera rentable.Through the document CH 640 159 A5 a procedure and an installation for the wet removal of sand are known. The molding assembly is deposited on a rotating grill and is sprayed with a water jet nozzle with a pressure of up to 800 bar. The water jet may result in the formation of cracks in the mold castings. The wet removal of sand can only be applied profitably, when water and sand can be used again in a cost-effective manner.
A traves del documento EP 992 323 A2 se conocen, ademas, un procedimiento y un dispositivo para desarenar piezas de fundicion. La caja de moldeo es colocada sobre una base permeable a la arena y al aire. Antes de desarenar las piezas de fundicion se retira la caja superior de la caja de moldeo de dos piezas. El fluido utilizado para el desarenado es concentrado en chorro de corte y es aplicado en forma de punto o de lmea a la superficie de la arena. Las piezas de fundicion conservan despues del desarenado su posicion original y son transportadas con un robot.In addition to EP 992 323 A2, a process and a device for unraveling cast iron parts are also known. The molding box is placed on a base permeable to sand and air. Before unraveling the castings, the upper case of the two-piece molding box is removed. The fluid used for sandblasting is concentrated in a cutting jet and is applied as a dot or lmea to the surface of the sand. The castings retain their original position after sanding and are transported with a robot.
El objeto del invento es, partiendo de este estado de la tecnica, divulgar un dispositivo y un procedimiento para desmoldear y desarenar piezas de fundicion en molde, con un coste en energfa y en aparatos lo mas pequeno posible, que garanticen una desarenado completo de las piezas de fundicion en molde.The object of the invention is, based on this state of the art, to disclose a device and a method for unmolding and unraveling cast iron parts, with a cost in energy and in the smallest possible devices, which guarantee a complete sanding of the cast iron parts.
Este problema se soluciona con un dispositivo para desmoldear y desarenar piezas de fundicion en molde coladas en arena de moldeo y en cajas de moldeo, que comprende un recipiente de aire a presion, una base permeable a aire y a arena y un recipiente colector, poseyendo el recipiente de aire a presion un orificio, que se corresponde con la superficie de la seccion transversal de la caja de moldeo y dispuesto con un medio de hermetizacion inmediatamente encima de la superficie de arena.This problem is solved with a device for unmolding and unraveling cast iron castings in molding sand and molding boxes, comprising a pressurized air container, an air and sand permeable base and a collecting container, possessing the Pressurized air container a hole, which corresponds to the surface of the cross section of the molding box and arranged with a sealing means immediately above the sand surface.
Los perfeccionamientos ventajosos del invento se desprenden de las reivindicaciones subordinadas.The advantageous improvements of the invention follow from the subordinate claims.
Es ventajoso, que al desmoldear y al desarenar, el impulso de aire a presion pueda actuar de la mejor manera posible sobre la superficie de la arena de moldeo. Esto se consigue por el hecho de que la caja de moldeo no es abierta y por el hecho de que no es retirada la mitad superior de la caja de moldeo. La caja de moldeo es depositada sobre el canto superior del recipiente colector.It is advantageous, that when unmolding and unraveling, the impulse of pressurized air can act in the best possible way on the surface of the molding sand. This is achieved by the fact that the molding box is not open and by the fact that the upper half of the molding box is not removed. The molding box is deposited on the upper edge of the collecting container.
Esto se consigue por el hecho de que la base permeable a aire y a arena se dispone a una distancia, que es menor que la mitad de la altura de una mitad de la caja de moldeo, debajo del canto superior del recipiente colector.This is achieved by the fact that the air and sand permeable base is arranged at a distance, which is less than half the height of one half of the molding box, below the upper edge of the collecting vessel.
Por medio de las figuras se describira un ejemplo de ejecucion del invento. En el muestran:An exemplary embodiment of the invention will be described by means of the figures. In the show:
La figura 1, una seccion de un dispositivo segun el invento para desmoldear y desarenar una caja de moldeo con una pieza de fundicion en molde durante la generacion de la presion.Figure 1, a section of a device according to the invention for unmolding and unraveling a molding box with a cast iron part during pressure generation.
La figura 2, una seccion del dispositivo de la figura 1 inmediatamente despues del desmoldeo y del desarenado.Figure 2, a section of the device of Figure 1 immediately after demolding and sanding.
La figura 3, la pieza de funcion en molde de la figura 2 sobre la base permeable a aire y a arena despues del desmoldeo y del desarenado.Figure 3, the mold function part of Figure 2 on the air and sand permeable base after demolding and sanding.
La figura 4, la pieza de fundicion en molde de la figura 3 sobre la base permeable a aire y a arena despues de retirar la caja de moldeo.Figure 4, the mold casting part of Figure 3 on the air and sand permeable base after removing the molding box.
En la figura 1 se representa esquematicamente y en seccion un dispositivo 1 para desmoldear y desarenar piezas 7 de fundicion en molde en arena 8 de moldeo y en cajas 6 de moldeo. La caja 6 de moldeo se compone de dos mitades de caja de moldeo dispuestas horizontalmente una encima de la otra, a saber una caja 10 superior y una caja 11 inferior. En la arena 8 de moldeo se representa esquematicamente una pieza 7 de fundicion en molde. La caja 6 de moldeo esta unida en el lado superior y en el inferior con medios 12, 13 de hermetizacion de manera hermetica a aire con el dispositivo 1 para desmoldear y desarenar. El dispositivo 1 comprende, ademas de losIn figure 1 a device 1 is shown schematically and in section for unmolding and unraveling cast iron parts 7 in molding sand 8 and in molding boxes 6. The molding box 6 is composed of two molding box halves arranged horizontally one above the other, namely an upper box 10 and a lower box 11. A mold casting part 7 is schematically represented in the molding sand 8. The molding box 6 is connected on the upper and lower sides with air-tight sealing means 12, 13 with the device 1 for unmolding and unraveling. The device 1 comprises, in addition to the
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medios 12, 13 de hermetizacion, esencialmente un recipiente 2 de aire a presion para el tratamiento de la superficie de arena de la caja 10 superior con aire a presion, una base 3 permeable a aire y a arena y un recipiente colector 4 para recoger la arena 8 de moldeo.sealing means 12, 13, essentially a pressurized air container 2 for the treatment of the sand surface of the upper case 10 with pressurized air, a base 3 permeable to air and sand and a collecting container 4 for collecting the sand 8 molding.
La caja 10 superior no es retirada durante el desmoldeo. El recipiente 2 de aire a presion posee un orificio, que esencialmente tiene el mismo tamano que la superficie de la arena 8 de moldeo en la caja 6 de moldeo. En el recipiente 2 de aire a presion se incrementa la presion del aire despues de que el dispositivo 1 fuera hermetizado con los medios 12, 13 de hermetizacion con relacion a la caja 6 de moldeo. Con una presion suficientemente alta se expulsa de la caja 6 de moldeo la arena 8 de moldeo junto con la pieza 7 de fundicion en molde. El recipiente 2 de aire a presion se construye como una campana con una altura relativamente pequena. El aire a presion actua de manera uniforma sobre la totalidad de la superficie de la caja 6 de moldeo, lo que se indica en la figura 1 por medio de las flechas.The upper box 10 is not removed during demolding. The pressurized air container 2 has a hole, which essentially has the same size as the surface of the molding sand 8 in the molding box 6. In the pressurized air container 2, the air pressure is increased after the device 1 was sealed with the sealing means 12, 13 relative to the molding box 6. With a sufficiently high pressure, the molding sand 8 is ejected from the mold box 6 together with the mold casting part 7. The pressurized air container 2 is constructed as a bell with a relatively small height. The pressurized air acts uniformly over the entire surface of the molding box 6, which is indicated in Figure 1 by means of the arrows.
La base 3 permeable a aire y a arena se dispone en el interior del recipiente 4 colector. La base 3 puede ser configurada por ejemplo como parrilla, plataforma o cinta transportadora o cualquier otro medio de transporte permeable a aire y a arena. La base 3 permeable a aire y a arena se dispone a una distancia del canto inferior de la caja 6 de moldeo. La distancia entre la superficie de la arena de la caja 11 inferior y la base 3 es inferior a la mitdad de la altura de la caja 11 inferior. Con ello se consigue, que la arena 8 de moldeo se pueda desprender de la pieza 7 de fundicion en molde durante el desmoldeo en todos los lados. La distancia entre la caja 6 de moldeo y la base 3 debe ser mantenida lo mas pequena posible para evitar danos de la pieza 7 de fundicion en molde al caer sobre la base 3.The air and sand permeable base 3 is disposed inside the collector container 4. The base 3 can be configured for example as a grill, platform or conveyor belt or any other means of transport permeable to air and sand. The air and sand permeable base 3 is arranged at a distance from the lower edge of the molding box 6. The distance between the sand surface of the lower box 11 and the base 3 is less than the height of the lower box 11. This achieves that the molding sand 8 can be detached from the mold casting part 7 during demolding on all sides. The distance between the molding box 6 and the base 3 must be kept as small as possible to avoid damage to the mold casting part 7 when falling on the base 3.
En la figura 2 se representa la situacion despues del desmoldeo y del desarenado. La arena 8 de moldeo se halla en el recipiente 4 colector y la pieza 7 de fundicion en molde descansa sobre la base 3. El dispositivo 1 todavfa esta cerrado, pero se halla en un estado sin presion. En este estado se pueden retirar el recipiente 2 de aire a presion y el recipiente 4 colector. Si la pieza 7 de fundicion en molde descansa sobre una cinta transportadora, tambien se puede transportar la pieza 7 de fundicion en molde con la caja 6 de moldeo vada ahora fuera del dispositivo 1 para desmoldear y desarenar.Figure 2 shows the situation after demolding and sanding. The molding sand 8 is in the collecting vessel 4 and the mold casting part 7 rests on the base 3. The device 1 is still closed, but is in a state without pressure. In this state, the pressurized air container 2 and the collector container 4 can be removed. If the cast iron part 7 rests on a conveyor belt, the cast iron part 7 can also be transported with the molded case 6 now out of the device 1 for demolding and unraveling.
En la figura 3 se representa esquematicamente la situacion durante el desmoldeo y el desarenado. La caja 6 de moldeo es transportada en su totalidad, es decir sin separar la caja 10 superior y la caja 11 inferior, hacia la instalacion de moldeo. En la instalacion de moldeo se llenan por separado las mitades del molde con arena 8 de moldeo, son comprimidas con la forma correcta por medio de un modelo y equipadas con material de machos asf como conducidas a continuacion a la estacion de colada.The situation during demolding and sanding is depicted schematically in Figure 3. The molding box 6 is transported in its entirety, that is to say without separating the upper box 10 and the lower box 11, towards the molding installation. In the molding installation the mold halves are filled separately with molding sand 8, they are compressed with the correct shape by means of a model and equipped with male material as well as then carried to the casting station.
En la figura 4 se representa la pieza 7 de fundicion en molde sobre la base 3 permeable a aire y a arena despues del desmoldeo y del desarenado. La pieza 7 de fundicion en molde puede ser transportada sobre la parrilla 3 hasta la siguiente estacion de tratamiento, por ejemplo el dispositivo de rebarbado.Figure 4 shows the cast iron part 7 on the base 3 permeable to air and sand after demolding and sanding. The mold casting part 7 can be transported on the grill 3 to the next treatment station, for example the overburning device.
Con el dispositivo 1 aqu descrito se desmoldean y desarenan las piezas 7 de fundicion en molde en un solo lugar. No es necesario un transporte a otra parte de la instalacion. La separacion previa de las mitades 10, 11 de la caja de moldeo no es deseable, ya que la generacion de una presion en el recipiente 2 de aire a presion solo funciona correctamente, cuando el recipiente 2 de aire a presion es colocado directamente sobre la caja 6 de moldeo. El desmoldeo y el desarenado con aire a presion no requieren agua ni una regeneracion y secado costosos.With the device 1 described here, mold casting parts 7 are demoulded and unraveled in one place. A transport to another part of the installation is not necessary. Pre-separation of halves 10, 11 from the molding box is not desirable, since the generation of a pressure in the pressurized air container 2 only works correctly, when the pressurized air container 2 is placed directly on the 6 molding box. Demoulding and sanding with pressurized air do not require expensive water or regeneration and drying.
Dado que inmediatamente debajo de la caja 6 de moldeo no se halla en el propio dispositivo 1 de desmoldeo ninguna parrilla o rejilla y porque la arena 8 de moldeo puede escapar despues del desmoldeo libremente hacia abajo, la arena, con frecuencia con efectos abrasivos, que es expulsada con una velocidad grande de la caja 8 de moldeo, no puede danar o desgastar excesivamente los elementos de la instalacion.Since immediately below the molding box 6, no grill or grating is found in the demoulding device 1 itself and because the molding sand 8 can escape after the demoulding freely downwards, the sand, often with abrasive effects, which It is ejected with a large speed from the molding box 8, it cannot damage or wear excessively the elements of the installation.
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09170147.4A EP2301692B1 (en) | 2009-09-14 | 2009-09-14 | Method and device for packing and dispatching casting mould parts |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2560777T3 true ES2560777T3 (en) | 2016-02-22 |
Family
ID=41130273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES09170147.4T Active ES2560777T3 (en) | 2009-09-14 | 2009-09-14 | Device and procedure to unmold and release mold castings |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2301692B1 (en) |
DK (1) | DK2301692T3 (en) |
ES (1) | ES2560777T3 (en) |
PL (1) | PL2301692T3 (en) |
PT (1) | PT2301692E (en) |
SI (1) | SI2301692T1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013224976B4 (en) * | 2013-12-05 | 2019-07-11 | Wobben Properties Gmbh | Process for the preparation of foundry sand, as well as casting system |
DE102016201824A1 (en) | 2016-02-08 | 2017-08-10 | Volkswagen Aktiengesellschaft | Mold casting line with 3D printer and process for mass production of castings |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3738415A (en) * | 1971-12-23 | 1973-06-12 | J Planten | Method of molding articles and reclaiming the foundry sand used |
CH640159A5 (en) | 1979-06-06 | 1983-12-30 | Foundry Design Corp Europ | METHOD AND SYSTEM FOR MOLDING, WET SANDING AND CLEANING CASTING PIECES. |
DD202114A5 (en) * | 1981-04-18 | 1983-08-31 | Badische Maschf Gmbh | METHOD AND DEVICE FOR PNEUMATIC COMPACTING FORMSAND |
DD234810A1 (en) * | 1985-03-01 | 1986-04-16 | Schwermasch Liebknecht Veb K | DEVICE FOR CLEANING CASTINGS |
DE19845899A1 (en) | 1998-10-06 | 2000-04-13 | Georg Fischer Disa Ag | Process for sanding castings |
WO2002094479A1 (en) * | 2000-07-27 | 2002-11-28 | Consolidated Engineering Company, Inc. | Method and apparatus for assisting removal of sand moldings from castings |
US7331374B2 (en) * | 2001-05-09 | 2008-02-19 | Consolidated Engineering Company, Inc. | Method and apparatus for assisting removal of sand moldings from castings |
-
2009
- 2009-09-14 PL PL09170147T patent/PL2301692T3/en unknown
- 2009-09-14 EP EP09170147.4A patent/EP2301692B1/en not_active Not-in-force
- 2009-09-14 PT PT91701474T patent/PT2301692E/en unknown
- 2009-09-14 DK DK09170147.4T patent/DK2301692T3/en active
- 2009-09-14 SI SI200931402A patent/SI2301692T1/en unknown
- 2009-09-14 ES ES09170147.4T patent/ES2560777T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP2301692B1 (en) | 2016-01-06 |
PL2301692T3 (en) | 2016-06-30 |
EP2301692A1 (en) | 2011-03-30 |
PT2301692E (en) | 2016-03-09 |
SI2301692T1 (en) | 2016-05-31 |
DK2301692T3 (en) | 2016-04-11 |
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