DD160741A3 - DEVICE FOR TRANSFERRING SAND FORM OF FORMKAESTEN IN STORAGE TANK - Google Patents

Abstract

The aim of the invention is to provide for the purpose of reducing the expensive molding box park automatic molding equipment, a device for Übere Sanding from Formkaesten in cheap Speicherbehaelter that pollution in this process as the cause of the molding plant and a risk of rejects for the castings by breaking the Mold bales are avoided. The object of the invention is to provide a device with the help of which also partial breakage of the sand molds or breaking off of sand moldings by thermal and / or mechanical effects is excluded with certainty. According to the invention this is achieved in that the device is formed of an over the molding box Ausstueckstempel with expressing plate and a arranged under the storage tank counter plunger, wherein a all sides enveloping, in its clear dimensions of the mold box corresponding and a loose bottom exhibiting Speicherbehaelter positioned under the mold box IS.

Description

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Title of the invention

Device for transferring sand molds from molding boxes into storage containers

field of use

The device is used in foundries when the number of expensive molding boxes is reduced and cheap storage containers are used.

Characteristic of the known technical solutions

Cast molds produced from foundry sand are produced in the predominantly used methods as upper and lower mold halves in the respective molding box by compacting the molding sand and, after the possible insertion of cores, added to a complete casting mold. The cost of molding boxes in automatic mold making, especially when using high pressure compression, is considerable both for purchase and maintenance.

In order to keep the number of required molding boxes low, it is known to deduct after molding the molding boxes of the casts containing the casts sand, the mold boxes for reuse and to let cool the castings in sand bales to the required temperatures (DD-WP 69 436; DE-OS 25 23 332).

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In molding systems that operate on such a principle, it is disadvantageous that the sand bale at least partially break apart by thermal and / or mechanical effects, whereby a considerable contamination of the molding plant occurs and continue batches of hot castings are biosgelegt, and thereby cool faster than the continuing from the molding sand covered lots. This results in risk of rejects for the castings or, for certain alloys, a thermal aftertreatment of the castings is required,

To avoid these disadvantages, it has been proposed, after removing the molding boxes, to insert the sand bales with embedded casting into so-called dump wagons (DE-AS 17 83 035, DE-AS 26 47 129).

With this measure, but the above-described _s defect can not be eliminated because during removal ^of: further breaks at least partly the form of boxes or ejection of the bale from the sand molding boxes and the insertion into the dump cart sand bales.

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Object of the invention

The aim of the invention is to provide for the purpose of Reduzerun the expensive Formkastenparkes automatic molding equipment, a device for transferring sand molds from Fo boxes in cheap storage containers, which break in this process pollution as a cause of failure of the molding plant and a risk of rejects for the castings to be produced the sand bale avoids.

Explanation of the nature of the invention

The invention has for its object to provide a device for transferring sand molds from molding boxes in storage container, with the help of a partial breakage of the sand molds or breakage of sand mold parts excluded with certainty wi

According to the invention this is achieved in that is formed from egg over the molding box ejection punch with counter-pressure plate and arranged under the storage tank counter-pressure stamp, with an all-round enclosing, in its clear Abmessun the mold box and a loose bottom a facing storage container is positioned under the mold box ,

By this arrangement or design of the storage container succeeds Oberführ the sand mold from the molding box into the storage container without sand-sanding parts can be detached from the sand bales, since the sand bale is constantly wrapped on all sides.

Execution game

The device according to the invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawing shows:

Fig. 1; A section through a device at the beginning of the Oberführungsvorganges

Fig. 2: the same section as in Fig. 1 after completion of the transfer process

Fig. 3: a variant of the device with a translator

The apparatus essentially consists of a framework 1, through which a molding box conveyor 2 and a storage container conveyor 3 extend, wherein the storage container conveyor 3 is arranged below the molding box conveyor 2. It is irrelevant whether the conveying direction of the two conveyors is in the same direction, in opposite directions or intersecting. Other arrangements are conceivable, e.g. As shown in Fig. 3, that the mold box conveyor 2 laterally offset to the storage container - conveyor 3 extends and a transmission device 10 is arranged.

Above that. Level of the upper edge of the flask 7 is attached to the frame 1 and the transmission device 12 of the ejection plate 5 having a push-4. Below the lower edge of the storage container 8, a counter-pressure ram 6 is arranged on the frame 1 in alignment with the ejection punch 4.

The storage container 8 has four smooth side walls whose clearances correspond to the clear widths of the molding box 7 and whose height is advantageously chosen to be slightly greater than the height of the molding box 7.

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The side walls of the storage container 8 are provided at its lower end with projections on which the bottom 9 rests loosely.

The device works as follows:

A storage container 8 which is conveyed through the storage container conveyor 3 into the area of the frame 1 is brought into an aligned position with the counterpressure plunger 6 by known means which are not explained or illustrated here. The counter punch 6 extends. He carries the bottom 9 to a few millimeters below the lower edge of the mold box 7 upwards.

Subsequently, the molding box 7 comes with embedded sand mold 11 on the molding box - conveyor 2 or by the translator 10 in alignment position to the storage tank 8 and the Ausdrückstempel 4. Then moves the squeezer 4 and press by means of its ejection plate 5, the sand mold 13 against the force the counterpressure plunger 6 from the molding box 7 into the storage container 8.

If the sand mold 11 has left the molding box 7, the ejection punch 4 returns to its starting position and the counterpressure plunger 6 automatically lowers until the base 9 rests on the projections of the side walls of the storage container 8 and the counterpressure plunger 6 is released from the base 9.

Following this, the full storage container 8 is transported away by the storage container conveyor 3 and an empty storage container 8 passes into the preparation of the frame 1. At the same time, the now empty plastic box 7 is transported away by the molding box 2 or conveyor 2. Thus, the starting position for the beginning of a new Arbeitsspi is reached again »

Claims (1)

.- """OU 3 UO Invention claim Apparatus for transferring sand molds from molding boxes in storage containers, consisting of a arranged above the molding box ejection punch with Ausdrückplatte and arranged under the storage tank counterpressure punch, characterized gekannzeichnet that an all-enveloping, in its clear dimensions of the molding box (7) corresponding and a loose bottom (9) having storage container (8) is positioned under the molding box (7). For this 3 pages drawings