EP0652812B1 - Device and method for placing a pouring basin on a sand mould - Google Patents

Abstract

In order to increase the usable casting time in the casting of a workpiece in a mould (2) of sand or other material, at the same time avoiding any increase in station time, the invention proposes a device for positioning a pouring basin (1) or funnel made of mould material, in particular sand, on the mould (2). The device is characterized by a mechanism designed to inject and consolidate the pouring basin (1) or funnel and to place the consolidated basin (1) or funnel directly on the mould (2). Also proposed is a method of injecting and consolidating a pouring basin (1) or funnel of this kind and placing it directly on the mould (2).

Description

The invention relates to a device for applying a pouring pool or funnel consisting of molding material, in particular molding sand, to a molding material or sand package. Furthermore, the invention relates to a method for applying a pouring pool or funnel consisting of molding material, in particular molding sand, to a molding or sand package using a device according to the invention.

Basically, the present invention relates to the field of foundry technology. For casting molded parts, foundry cores or molds are usually produced in separate parts, brought together and connected to one another to form a casting mold or a sand packet. These sand packs are then filled with molten metal to produce, for example, a metallic workpiece, the series of sand packs to be filled with molten metal passing through the production line in a row.

The time required to fill or pour the liquid metal into a sand packet ultimately determines the cycle time, especially since it must always be ensured that each sand packet is filled with a sufficient amount of metal - through a relatively small pouring opening. Only after the filling process has been completed can the filled sand packet be taken to the next station for further processing.

However, the above-mentioned procedure for filling a sand packet with molten metal is problematic in that the time-consuming filling of the sand packet is always to be regarded as a critical cycle time and thus has a considerable influence on the entire production time. Since the actual cycle times at the other processing stations are significantly shorter, the actual cycle time and thus the entire production time of a cast part is considerably extended by filling the sand package.

A generic device and a corresponding method are known from US-A-2 198 498, according to which a casting pool can already be applied to a molding material or sand package. The pouring pool consists of a heat-resistant laminate. This is intended to achieve a particular stiffness or stability with sufficient heat resistance.

The pouring pool known from US-A-2 198 498, however, is particularly problematic in practice, since it must be disposed of separately in connection with mold material or sand packs. The pouring pool, which is made of meltable material, is at least partially melted and for this reason alone tends to lose stability or strength. The pouring pool made of laminate must in any case be subjected to special disposal or waste treatment, especially since this pouring pool is generally asbestos-containing. In any case, the material of the pouring basin must always be separated from the molding material or molding sand.

The present invention is based on the object of specifying a device for applying a pouring basin or funnel to a molding material or sand package, which on the one hand enables rapid pouring and thus minimizes the cycle time and on the other hand simple disposal of the pouring basin. A corresponding procedure is also to be specified.

The device according to the invention for applying a pouring pool or funnel consisting of molding material, in particular molding sand, to a molding material or sand packet solves the above object by the features of claim 1. Thereafter, the device according to the invention is characterized by a device for shooting, solidifying and direct application of the shot and solidified pouring pool or funnel onto the sand packet, the device comprising a shot kettle having at least one shot nozzle and a shot form downstream of the shot nozzle, a shot and tensioning head and a counter-holding device and the shot nozzle or shot nozzles in one as a shot, press and Ejection frame serving work frame is or are and wherein the pouring basin after lifting the Counter holding device can be ejected from the shot mold and can be pressed directly onto the sand package.

The method according to the invention for applying a pouring pool or funnel consisting of molding material, in particular molding sand, to a molding or sand package using a device according to the invention, the casting pool or funnel being shot and solidified in the shooting mold, solves the above task - in a more procedural manner Regarding - by the features of claim 10. Thereafter, the method according to the invention is characterized by a direct application of the shot and solidified pouring pool to the sand packet, wherein in the ejection position the pouring pool is ejected and at the same time pressed onto the sand packet by the ejection force, and wherein during ejection of the pouring pool the shot boiler is raised together with the shot form from the sand packet.

In a manner according to the invention, in a departure from the prior art, the casting pool is made of molding material, in particular molding sand. For the manufacture and application of the pouring pool to a molding or core package, a special device is provided in a further inventive manner, namely a device for shooting, solidifying and direct application of the shot or consolidated pouring pool or funnel to the sand package. In other words, the pouring basin is produced analogously to the molding material or sand package, namely from molding material or core sand. For this purpose, the pouring puddle is shot in a manner known per se, solidified and - in a further step - applied directly to the previously packaged and solidified sand packet.

Consequently, it was first recognized here that the process of pouring molten metal into the sand pack always takes an enormous amount of time due to the pouring opening, which is generally only of small diameter. This period of time was previously determined at the casting station at the casting station, so that the cycle time as a whole was predetermined. In the manner according to the invention, the time period required for casting is decoupled from the actual casting station, namely around the pouring opening of the sand packet a well-known pouring pool or a kind of funnel is placed around it. This pouring pool or funnel has an enormous pouring opening and virtually forms a basin for the melt, so that the molten metal can be poured very quickly into the pouring pool surrounding the actual pouring opening of the sand pack. From there, the liquid metal reaches the interior of the sand pack through the narrower pouring opening.

After the pouring pool has been adequately filled with molten metal, however, the sand packet can already be conveyed to the next work station, so that the liquid metal can flow completely into the interior of the sand packet during transport to the next work station. Consequently, the time required to fill the sand packet is no longer critical with regard to the cycle time, and therefore no longer determines the usually very long cycle time per workstation.

In a further manner according to the invention, it has been recognized that the casting pool or funnel, which serves at least indirectly to reduce the cycle time, can expediently be produced from the same material as the sand packet itself. Accordingly, the casting pool - like the sand packet - can be produced or closed by means of a core shooter , solidify and apply directly to the sand package after manufacture, so that at least mechanical toothing and thus a high coefficient of friction is present between the pouring pool and the sand package, whereby slipping of the pouring pool when filling with molten metal is effectively avoided. It is not necessary to insert the pouring pool for fixation. In any case, it is essential to the invention that the pouring basin or funnel itself is made of molding material, in particular molding sand, and that the molding or sand package is shot and solidified.

After the pouring pool has been applied to the molding material or sand package or after casting, the pouring pool can be disposed of or recycled together with the molding material or sand package, since these are the same materials.

The same applies to the method according to the invention, according to which the pouring basin or funnel is shot from molding material or molding sand and is then applied to the sand packet.

Advantageously, the pouring basin is a type of funnel with a wall that is approximately circular in shape or closed over corners by means of straight edges. The outer geometry of the pouring pool - whether round or square - plays only a minor role. In a particularly advantageous manner, the wall of the pouring basin widens in cross-section towards the end associated with the sand packet in such a way that the inner cross section of the pouring basin tapers and thus has the shape of a funnel, at least in the inner region. This ensures in a particularly suitable manner that the metal poured onto the sand packet and into the pouring basin actually reaches the inside of the sand packet through the pouring opening of the sand packet and fills the interior there completely. In addition, the liquid metal filled in the pouring pool presses the pouring pool onto the sand pack due to the bevelled inner surfaces, which enormously increases the operational reliability of the pouring pool. In addition, there is another advantage in that the pouring pool or the like as a kind of elongated riser. works.

The shot shape specifies the shape of the pouring basin to be made, this towards the free end of the shot bowl, i.e. down, is open. Furthermore, a shot and clamping head and a counter-holding device are provided, so that the shot kettle between the shot and clamping head and the counter-holding device can be at least largely clamped in a sealing and pressing position. The counter-holding device forms the lower limit of the shot shape, so that in the working position it is only possible for the molding material to flow in or shoot in through the shot nozzles.

The shot nozzles can be designed as perforated nozzles or as slotted nozzles, wherein in the case of the design of the shot nozzles as perforated nozzles, several shot nozzles are always required to obtain a pouring pool that is more or less homogeneously shot.

The working frame, which has the firing nozzle or firing nozzles, is arranged so as to be displaceable in the axial direction in a sealing manner on the inner wall of the firing kettle, preferably in the region of the end facing the counter-holding device. Consequently, the casting pool can be additionally pressed or recalibrated after shooting through the work frame and, after being lifted off the counter-holding device, ejected from the shot mold or pressed onto the sand packet.

So that the work frame can now effectively carry out the tasks intended for it, it is further advantageously operatively connected to a driver plate which extends approximately centrally in the transverse direction of the movement of the work frame. The working frame can now be moved axially on the driver plate, on the one hand, for pressing, on the other hand, for ejecting the pouring pool and for pressing onto the sand package. Furthermore, the working frame is arranged between the inner wall of the shot boiler and the outer wall of an inner block arranged approximately centrally in the shot boiler in a sealing - displaceable - manner.

At least one cylinder which serves as a pressing and ejection cylinder and can be acted upon hydraulically or pneumatically on both sides is formed within the inner block. The driver plate protrudes through the cylinder in the sense of a piston and the working frame is dimensioned and displaceably arranged such that it or its seals directed towards the outer wall of the inner block always seal the passage of the driver plate through the inner block. In other words, the driver plate can move in the sense of a piston depending on the action of the cylinder in question upwards or downwards, which in turn can be acted upon by the work frame for pressing or compacting the pouring pool or for ejecting or pressing the pouring pool onto the sand packet.

With regard to the design of the weft and clamping head, it is particularly advantageous if it has a weft air connection and a weft air filter, the weft air filter in particular for filtering the after Shooting possibly serves back flowing air. Backflow of molding sand into the compressed air generating units of the device is effectively prevented by the shot air filter.

The shot and tensioning head can be moved vertically, in particular with regard to a smooth process sequence, via an upper tensioning cylinder, so that it can be placed automatically on the shot boiler for firing the pouring pool.

The counter-holding device has a lower pressure plate which can be moved vertically by a lower clamping cylinder, this pressure plate closing the protective form downwards during the shooting of the pouring basin. After the actual shooting and pressing or recalibration of the pouring pool, the pressure plate is moved downward over the tensioning cylinder and the shot and tensioning head is lifted from the shot boiler so that it moves out of the area between the shot and tensioning head and the counter-holding device, i.e. can be pivoted out of the firing and pressing position. The friction between the shot and pressed pouring pool and the inner wall of the shot form is sufficient that the pouring pool cannot slip out of the shot form or fall out.

With regard to an effective reduction in the cycle time, it is particularly advantageous if at least one additional shot boiler is provided. In a particularly advantageous manner, two shot boilers are provided for this. The shot kettles can be moved alternately from the shot and press position between the shot and clamping head into an ejection and possibly refill position between the sand packet and possibly a sand bunker, the sand packet being located below the shot boiler to be positioned there and the sand bunker located above the shot boiler.

The rotating device in question further advantageously has a swivel arm holding the shot boiler, which is preferably articulated vertically and rotatably about a column and a cylinder-piston arrangement to a machine frame, approximately centrally between the shot boilers.

The vertical movement of the shot kettle basically serves to optimally apply the pouring pool to the sand package. This is because while the compacted pouring pool is pressed out of the shot mold by means of the movement of the working frame and pressed onto the sand packet, the entire shot boiler is lifted off the sand packet to avoid crushing or destruction of the pouring pool, so that the movements of the working frame and the shot boiler are reduced to To a certain extent compensate for avoiding excessive pressure on the pouring pool or even on the sand package.

With regard to an optimal arrangement of the two shot boilers, it is particularly advantageous if the shot and pressing position and the ejecting and possibly refilling position are diametrically opposed to one another. Accordingly, it is correspondingly advantageous if the rotating device can be rotated through approximately 180 °, so that the shot boilers, which are then also diametrically opposite one another, can be brought into the two working positions by pivoting the rotating device.

Likewise, the horizontal position of the rotating device as a whole could be changed, as a result of which the shot boiler can in turn be adjusted in height. The swivel arm of the rotating device could preferably be pivoted or pivoted on the shot boiler via a cylinder-piston arrangement, so that the shot boiler is vertically adjustable, in particular when the pouring basin is put down or pressed on. As a result, the height of the shot boiler could be adjusted both via the cylinder-piston arrangement between the swivel arm or column and the machine frame and also via the cylinder-piston arrangement between the swivel arm and the shot boiler.

Furthermore, an upper crossbar of the machine frame could hold an automatic displacement axis of the cylinder-piston arrangement or of the column carrying the swivel arm. By means of this automatic displacement axis, the ejection position of the shot boiler could be matched exactly to the pouring opening of any sand packs or adjusted to their position. As a result, different sand packets could be provided with pouring pools, without having to carry out a laborious retooling of the device. The automatic displacement axis would in any case be fed with the position of the sand packet or with parameters relating to its geometry.

With regard to the method according to the invention, it is of particular advantage if the casting pool is solidified mechanically, namely by uniaxial pressing or recalibration. However, a binding substance could also be added, as is usually the case in the manufacture of foundry cores.

With regard to fully automated production, especially with regard to the fully automated provision of different sand packs with pouring pools and subsequent pouring in of molten metals, it is particularly advantageous if the pouring openings provided in the sand packs can be detected and the shot boiler exactly in according to the position of the pouring openings its ejection position can be positioned, so that even the most varied sand packs can be provided with pouring pools one after the other without having to retool the device according to the invention. This also significantly reduces the total processing or manufacturing time. The pouring openings can be detected via control parameters when pressing or conveying the sand packs on the basis of the dimensions of the sand packs and the individual position of the pouring opening in the sand pack.

Finally, it is particularly advantageous with regard to fully automatic production with the shortest cycle time if, during the firing and subsequent pressing of the firing barrel in the firing and pressing position, the second firing barrel in the ejecting and refilling position expels the casting pool approximately simultaneously presses the sand packet and, if necessary, replenishes it with molding material. The cycle time specified on the one hand in the firing and pressing position and on the other hand in the ejecting and refilling position is less than 10 seconds.

Fig. 1

in einer Seitenansicht, schematisch, ein Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung zum Aufbringen eines aus Formsand bestehenden Gießtümpels auf ein Sandpaket, wobei insgesamt zwei Schußkessel vorgesehen sind,

Fig. 2

in einer schematischen Darstellung, vergrößert und teilweise geschnitten, den Gegenstand aus Fig. 1,

Fig. 3

in einer schematischen Darstellung, vergrößert und geschnitten, das Innenleben eines Schußkessels in der in den Figuren 1 und 2 gewählten Ansicht und

Fig. 4

den Gegenstand aus Fig. 3 um 90° gedreht, wobei der Gießtümpel bereits aus der Schußform herausgedrückt ist.

There are now various possibilities for advantageously designing and developing the teaching of the present invention. This is on the one hand the claims subordinate to claims 1 and 10, on the other hand to refer to the following explanation of an embodiment of the invention with reference to the drawing. In connection with the explanation of the preferred exemplary embodiment of the invention with reference to the drawing, generally preferred configurations and developments of the teaching are also explained. In the drawing shows

Fig. 1

in a side view, schematically, an embodiment of a device according to the invention for applying a pouring pool consisting of molding sand to a sand packet, a total of two shot boilers being provided,

Fig. 2

in a schematic representation, enlarged and partially cut, the object of Fig. 1,

Fig. 3

in a schematic representation, enlarged and sectioned, the interior of a shot boiler in the view chosen in Figures 1 and 2 and

Fig. 4

3 rotated by 90 °, the pouring pool having already been pushed out of the shot shape.

The figures together show a device for applying a pouring pool 1 consisting of molding sand to a sand packet 2. The device according to the invention has a device for shooting, solidifying and direct application of the shot and consolidated casting pool 1 to the sand packet 2.

The casting pool 1 selected here has an approximately rectangular shape, the straight edges of the casting pool being closed at corners to form a circumferential wall. The wall of the pouring basin 1 is widened in cross section towards the end associated with the sand packet 2, so that the pouring basin 1 tapers in the free inner cross section.

2, 3 and 4 show particularly clearly that the device for firing, solidifying and direct application of the pouring basin has a firing nozzle 5 which has a firing nozzle 3 and a firing nozzle 4 which is arranged downstream of the firing nozzle 3. Furthermore, a shot and clamping head 6 and a counter-holding device 7 are provided. As shown in FIGS. 1 and 2, the shot boiler 5 is clamped between the shot and clamping head 6 and the counter-holding device 7 in a largely sealing and pressing position, the counter-holding device 7 forming the lower limit of the weft shape 4.

2, 3 and 4 show particularly clearly that the shot nozzle 3 is formed in a work frame 8 serving as a shot, press and ejection frame. The shot nozzle 3 is designed here as a circumferential slot nozzle.

The working frame 8, which has the firing nozzle 3, is arranged so as to be displaceable in the axial direction in a sealing manner on the inner wall 9 of the firing chamber 5, specifically in the region of the end facing the counter-holding device 7. The working frame 8 which has the firing nozzle 3 is operatively connected to a driver plate 10 which extends approximately centrally in the transverse direction to the direction of movement of the working frame 8. The working frame 8 is axially displaceable via the driver plate for pressing and then ejecting the pouring basin 1 and for pressing the pouring basin 1 onto the sand packet 2 and sealing between the inner wall 9 of the shot boiler 5 and the outer wall 11 of an inner block 12 arranged approximately centrally in the shot boiler 5 slidably arranged.

2, 3 and 4 also show particularly clearly that within the inner block 12 two serving as press and ejection cylinder, hydraulically or pneumatically acted on both sides cylinders 13 are formed. The driver plate 10 protrudes through the cylinder 13 and acts there in the sense of a piston. The work frame 8 is dimensioned and slidably arranged such that it or its towards the outer wall 11 of the inner block 12 Directional seals 14 always seal the passage 15 of the driver plate 10 through the inner block 12.

In Fig. 2 it is indicated that the shot and clamping head 6 has a shot air connection 16 and a shot air filter 17 for filtering the air possibly flowing back after the shooting. Furthermore, FIGS. 1 and 2 together show that the shot and clamping head 6 can be moved vertically via an upper clamping cylinder 18.

The counter-holding device 7 shown in FIGS. 1 and 2 comprises a lower pressure plate 20 which can be moved vertically by a lower clamping cylinder 19 and which closes off the weft shape 4 at the bottom.

Within the scope of the exemplary embodiment selected here, a second, identical shot boiler 5 is provided. Both shot boilers 5 can be moved alternately from the shot and press position between the shot and clamping head 6 into an ejection and possibly refill positions between the sand packet 2 and a sand bunker 22 by means of a rotating device 21. The sand bunker 22 can in turn be closed by an annular flap 23, so that metering can take place via its degree of opening or the sand bunker 22 can be closed completely. Only in passing should it be mentioned here that the shot boiler 5 is equipped with a level probe 24, which indicates sufficient filling of the shot boiler 5 with molding sand, so that the ring flap 23 of the sand bunker 22 closes when the level specified by the level probe 24 is reached.

The previously mentioned rotating device 21 has, as shown in FIG. 1, a swivel arm 25 which holds the shot boiler 5 and which is vertically and rotatably movable approximately centrally between the shot tanks 5 via a column 26 and a cylinder-piston arrangement 27 on a machine frame 28 is articulated. The shot and press position and the ejection and refill position of the shot bowl 5 are diametrically opposed to each other. The rotating device 21 can be rotated through 180 °. Furthermore, the rotating device 21 as a whole and thus the shot boilers 5 can be changed in their horizontal position. For this purpose, the swivel arm 25 can be rotated via a cylinder-piston arrangement 29 pivotably articulated on the shot boiler 5, so that the shot boiler 5 is vertically adjustable, in particular when the pouring pool 1 is put down or pressed on.

An upper cross member 30 of the machine frame 28 holds an automatic displacement axis 31 of the cylinder-piston arrangement 27 or column 26. The machine frame 28 is designed as a machine frame and both the sand bunker 22 and the counter-holding device 7 are articulated on the machine frame 28.

With regard to the method according to the invention for applying a pouring pool consisting of molding material or molding sand to a sand packet, reference is made to the relevant statements in the general part of the description.

Claims (14)

1. Device for placing a pouring basin (1) or funnel consisting of moulding material, in particular moulding sand, on a mould of moulding material or sand (2),
   characterised by a device for blasting, compacting and direct placing of the shot and compacted pouring basin (1) or funnel on the sand mould (2), in which connection the device comprises a blasting furnace (5) having a blasting nozzle (3) and a blasting mould (4) which is arranged downstream of the blasting nozzle (3), a blasting and clamping head (6) and a counter-retaining device (7), and the blasting nozzle or blasting nozzles (3) is or are formed in an operating frame (8) which is formed as a blasting, pressing and pressing-out frame and wherein the pouring basin can be pressed out of the blasting mould (4) when the counter-retaining device (7) has been lifted off and can therein be pressed directly onto the sand mould.
2. Device according to Claim 1, characterised in that the pouring basin (1) comprises a wall which is closed in an approximately circular manner or by means of straight edges over corners, and in that the wall of the pouring basin (1) widens in cross-section towards the end which is to be allocated to the sand mould (2), such that the pouring basin (1) tapers in the empty inner cross-section.
3. Device according to Claim 1 or 2, characterised in that the blasting furnace (5) can be clamped in an at least substantially sealing manner between the blasting and clamping head (6) and the counter-retaining device (7) in a blasting and pressing position, wherein the counter-retaining device (7) forms the lower delimitation of the blasting mould (4).
4. Device according to one of Claims 1 to 3, characterised in that the blasting nozzles (3) are formed as hole type nozzles or as slit type nozzles.
5. Device according to one of Claims 1 to 4, characterised in that the operating frame (8) comprising the blasting nozzle or blasting nozzles (3) is arranged, axially displaceably and in a sealing manner, on the wall of the blasting furnace (9), preferably in the vicinity of the end turned towards the counter-retaining device (7), and is connected in an active manner to a drive plate (10) which extends centrally, approximately transverse to the direction of movement of the operating frame (8), and in that the operating frame (8) is axially displaceable via the drive plate (10) to press and, subsequently, press out the pouring basin (10) and to press on the sand mould (2), wherein the operating frame (8) is arranged in a sealing, displaceable manner between the inner wall of the blasting furnace (5) and the outer wall (11) of an inner block arranged approximately centrally in the blasting furnace.
6. Device according to Claim 5, characterised in that there is formed, inside the inner block, at least one cylinder (13) which acts as a pressing and pressing out cylinder, and can be acted on hydraulically or pneumatically; in that the drive plate (10) extends through the cylinder (13) in the manner of a piston, and in that the operating frame (8) is dimensioned and displaceably arranged in such a manner that it, or the seals (14) thereof which are directed towards the inner block (12), always seal off the passage (15) of the drive plate (19) by means of the inner block.
7. Device according to one of Claims 1 to 6, characterised in that the blasting and clamping head (6) comprises a blasting air connection (16) and a blasting air filter (17), in particular for filtering the air which flows back after blasting, and can be displaced in a vertical manner by means of an upper clamping cylinder (18).
8. Device according to one of Claims 1 to 7, characterised in that at least one further blasting furnace (5) is provided; that the blasting furnaces (5) can, by means of a rotating device (21), be brought, in a reciprocal manner, out of the blasting and pressing position between the blasting and clamping head (6) into a press-out and, optionally, refilling position between the sand mould (2) and, optionally, a sand hopper (22), and in that the rotating device (21) comprises a pivot arm (25) which retains the blasting furnace (5) and which is, preferably, articulated in a vertical and rotationally displaceable manner approximately centrally between the blasting furnaces (5) by means of a column (26) and a cylinder piston arrangement (27), wherein the blasting and pressing position and the pressing out and, optionally, refilling position, are, optionally, diametrally opposite one another.
9. Device according to Claim 8, characterised in that the pivot arm (25) is articulated via a cylinder piston arrangement and preferably in a rotatable or pivotable manner, on the blasting furnace (5), such that the blasting furnace is vertically adjustable in particular when the pouring basin (1) is deposited or pressed on; in that an upper transverse crossbeam (30) of the machine framework (28) retains an automatic displacement shaft (31) of the cylinder piston arrangement (29) or the column (26); and in that the machine framework (28) is formed as a machine frame; and in that both the hopper (22) and the counter retaining device (7) are articulated on the machine framework (28).
10. Process for applying a pouring basin (1) or funnel, consisting of moulding material, in particular moulding sand, to a moulding or sand mould (2) using a device according to one of Claims 1 to 9, wherein the pouring basin (1) or funnel is shot and compressed in the blasting mould (4),
    characterised by a direct application of the shot and compressed pouring basin (1) onto the sand mould (2), wherein the pouring basin (1) is pressed out and simultaneously pressed onto the sand mould (2) by means of the pressing out force, and wherein the blasting furnace (5) is caused to travel upwards, together with the pouring basin (1), by the sand mould (2) when the pouring basin (1) is pressed out.
11. Process according to Claim 10, characterised in that the compression of the pouring basin (1) is performed mechanically, preferably by means of an axial compression or recalibration, and in that the blasting and compressing are performed in a blasting and pressing position and the pressing out and mounting on the sand mould (2) are performed in a pressing out position.
12. Process according to Claim 10 or 11, characterised in that, in the pressing out position, a refilling of the blasting furnace (5) with moulding material, preferably with core sand, is performed.
13. Process according to Claims 10 to 12, characterised in that the apertures for pouring in which are provided in the sand mould (2) can be detected and the blasting furnace (5) can be positioned exactly in its pressing out position, corresponding to the position of the apertures for pouring in, such that it is also possible to provide different sand moulds (2) with pouring basins in series, wherein the detection of the apertures for pouring in is performed via control parameters during pressing or forwarding of the sand moulds (2), taking the measurements of the sand moulds (2) as a basis.
14. Process according to one of Claims 10 to 13, wherein two blasting furnaces (5) are provided, characterised in that during the blasting and subsequent pressing of the blasting furnace (5) which is in the blasting and pressing position, the blasting furnace (5) which is in the pressing out and refilling position presses out the pouring basin, presses on the sand mould (2) in this process and is optionally refilled, wherein the cycle time in, on the one hand, the blasting and pressing position and, on the other hand, in the pressing out and refilling position, is less than 10 seconds.

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