DE2425826A1 - SAND MOLDING MACHINE - Google Patents

Description

"Sand formmas chine"

The invention relates to a sand molding machine with a compression chamber, a support for a mold and / or a core, and a compression cylinder. It represents an improvement of the known sand molding machines with regard to the compression chamber arrangement, the Porm compression cylinder and the Ejection and core insertion units.

Numerous sand molding machines of various types are already known. A disadvantage of the known machines is therein to see 'that they make the sand molds relatively slowly. Often a sand compaction chamber is provided which must be filled with sand, which is then compacted, but while the compacted form is ejected or out is removed from the chamber, the machine remains completely inactive.

The problem of how to make such sand molding machines quickly and economically can work, is already with the USA

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Commonly assigned patent applications 114,993 and 11 ^ 823 been approached. The arrangements described there generally provide two compression chambers, which are next to each other and in a linear direction between a compression position and an ejection position reciprocates four the can. With the present invention a better solution to the problem is found, in particular a more economical one Work as possible with the well-known sand molding machines.

The known sand molding machines are generally cumbersome Construction and therefore expensive to manufacture. The known sand molding machines are also built so that they have little are movable, which means the simultaneous production of one or more sand molds with different shapes * regards. The machine according to the present invention fulfills the task of having either one or several Can make kinds of shapes or that the same shapes can be made with twice the speed.

Furthermore, the known machines have disadvantages in terms of inserting cores where they are needed. Become common Special core inserting or core filling devices are used, which complicate the construction of the machine to an undesirable extent. With other machines, the devices for filling in cores are difficult to reach, making the process more difficult of filling the kernels by hand, especially if it takes a lot of time. The setup after the Invention achieved in that an ejection device is provided which includes a core insertion tool that is particularly simple and easy to access for insertion which has kernels.

The sand molding machine according to the invention increases the efficiency in their operation with a simultaneous increase in output. The machine is suitable for two rows of to produce ejected shapes, each along a

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own conveyor or platform is moved. In this way, the new machine can continue to work together with a significant increase in output at the same time possibly slower finishing machines used connected to each transport device connected to the sand molding machine.

One problem that xd.rd solved with the invention is to that the sand molding machine does not have the disadvantages of the known machines of the same type described above.

Care has been taken to ensure that the present invention is simple in construction and economical to manufacture suitable is.

Another advantage of the new machine is that the way it works has high efficiency and that produces two rows of completed sand molds.

The invention is characterized by a pivotably arranged Chamber carrier, which can be moved in an oscillating manner in two angular positions, through a first and at least one second sand mold compression chamber, which the chamber bearer wears and the im Angle are arranged at a distance around the pivot axis of the chamber support, so that the Verdichtungkammexn oscillating in a Sand filling position and moved into a sand compaction position in an angular position of the chamber support and then can be moved into a sand mold ejector in the other angular position of the chamber carrier. A hallmark of Invention is seen in that the sand molding machine has a pair of Verdithtungskammern, which is pivotable, the compression chambers are at an angle of 90 ° to each other and each movable at an angle oscillating around a horizontal axis is. Another characteristic of the invention is that in many cases form compression cylinders are provided which can be pivoted are mounted, and which by oscillating different models

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bring into the compression position after each molding operation. Further according to the invention is a device for ejecting and provided for inserting cores of the sand molding machine, including a pivotably arranged ejector, which is located between a vertical compression position and an inclined insertion position; lets move when the ejector is off the compression chamber is completely withdrawn.

Each compression chamber has two opposite open sides. The machine also contains a pair of compression cylinders, each of which is arranged on a different side of the chamber support. Each compression cylinder lets move reciprocally with respect to the two open sides. The compression cylinders are sized so that they are through the respective enter the open sides of the compression chamber can, if this is in an angular position for compacting sand that was previously filled into the compaction chamber has been.

Another characteristic of the present invention is that a model is provided on each of the compression cylinders is. Each compression cylinder contains one for this purpose pivotably arranged model carrier, which can be moved in an oscillating manner between two angular positions about an axis that corresponds to the Axis is vertical about which the chamber carrier can be pivoted. First and second shapes are angled about the pivot axis each Model carrier attached at a distance. One of these models of each model carrier is in a sand compaction position in one Angular position of the model carrier movable, and the other model can be moved into the sand compaction position in the other angular position of the model carrier. Means to oscillate in Angular direction of each of the two model carriers between the angular positions of the model carrier after each molding operation provided, further means for linearly reciprocating each of the model carriers for the purpose of moving the models to the sand compacting position of the model carrier through the open sides of the

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Compression chamber, which is in its one angular position, and for withdrawing the models from the compression chamber, when the sand has been compacted in it.

It is preferable if the model carrier and the chamber carrier move back and forth synchronously. That way everyone is Set of shapes "on similarly oriented supports assigned to one of the compression chambers.

VJo each of the first and second models is provided with a protrusion to form a riser, the first and vidas become the second Model adjusted by 180 ° to each other in order to bring the projections into a position in which they are opposite the corresponding ones Walls that form the two compression chambers. That way, the outcast have Fox'men on either side Eter chamber of the wearer is the riser openings on top of the surface.

Another important feature of the invention is a sand mold ejector A core inserter comprising an ejector member pivotally mounted generally in a plane. A core support is resilient on this ejector member on the side thereof arranged, which rests against the form to be ejected. The core support contains a means for releasably retaining it of at least one core and for releasing the core by pressing the ejector member against a sand mold, which ejected and which is provided with recesses for receiving Kernenn. It is provided that the ejector can be pivoted with a device in a position in which it is angled for the insertion of the core, if the Ejection member is withdrawn from a sand compaction chamber in the other angular position. A device to reset of the ejector member is provided, which moves it about its pivot point from the core insertion angular position into an ejector angular position brings when the ejector in the direction of the sand compaction chamber in its other angular position vor-

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moves. With another device, the ejector member can be moved between a core insertion position and a sand compaction position move linearly back and forth.

In a preferred embodiment for a compression cylinder in a sand molding machine is a model carrier provided, which can be adjusted oscillating about an axis between two angular positions by 180 °. A model is provided, which has a projection for .Ausbilden a riser and is carried by the mold carrier. This head start is mounted alternately on opposite sides of the compression axis during the back and forth movement of the model carrier. There is also a facility for implementation a reciprocating angular movement of the model carrier after each molding operation. The arrangement is made that the model carrier along this axis in the direction of a compression chamber of the sand molding machine and as a result thereof can be moved linearly in the direction of angular movement of the carrier. In this way each ^ Qer gets successively compacted sand mold a riser hole on another side of this axis.

Either with the multiple compression cylinder or with the individual rotatable compression cylinders are according to the invention Compression chambers are provided, which alternate in Ejection positions on other sides of the sand distortion position are to be moved by moving the models 90 ° out of the Sand compaction position rotated to mold ejection position will. In any case, the models that are used in succession of the compression operations have their lead offset by 180 ° to each other so that the projections come into positions close to opposite walls, which include the compression chamber. In this way, the ejected sand molds get on either side of the sand compaction position their riser holes in their surfaces.

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The machine according to the invention has the further characteristic that, since the compression cylinders on both sides of the Compression chamber are arranged, the to and fro and to enter and exit from the respective compression chamber are arranged if these are in their compression division stands. The ejectors are also provided so that they lie on opposite sides of the chamber support. Everyone The ejector lets you pass alternately through another separate compression chamber. The one angular position at Compress and the other angular position when ejecting take different heights, so that the compression cylinder and the ejectors can move back and forth independently of one another without interfering with one another.

The drawing shows an exemplary embodiment of the invention. There are!

Fig. 1 shows a molding machine in front view with sealing cylinders apart from one compression chamber, which is in the compression position and with the other compression chamber in the position for ejecting the mold,

Fig. 2 is a plan view of the arrangement of the compaction chambers and the compaction cylinder according to Fig. 1, wherein it can be seen that there are two models on the compaction cylinders ^: "The two are movable by pivoting about a vertical axis in the sand compaction division,

Fig. 3 is a view similar to * Fig. * 1 with one of the compression chambers compression cylinders retracted during a forming or compression process,

FIG. H shows a view similar to FIG. 2 with two models, inside the compression chamber for compressing the 409881/03 5 1

Sandes and with two other models, one of them each compression cylinder in an idle position,

Similar to FIG. 5 is a view Fig. 4, which shows in broken line the changing position of the compression cylinder, wherein the models are within the Verdicritungskammer this time those that were previously in the idle position shown in FIG. ¹ J, while that of Fig. H models in the working position are now in the idle position,

Fig. 6 is a view similar to Fig. 5, wherein the models originally shown in Fig. 5 in the idle position are now in the chamber, while those of FIG. 5 are in the working position Models now in the inactive Bind position after the chambers have been pivoted into the position shown in FIG are,

7 is a side view, shown partially schematically, showing the compression chamber arrangement according to FIG Fig. 1 and shows the top plate mechanism cooperating with each compression chamber included in the sand compaction position, and shows how the compaction chambers around a Shaft rotated or pivoted to alternately one or the other chamber in the form or to bring into the ejection position,

8 shows an oblique view of the compression chamber arrangement and the arrangement of multiple compression cylinders according to FIG. 1 with a representation of the Discharge platforms or conveyors that work with the compression chambers when they are in are in the mold ejection position,

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Pig. 9 is an oblique view of the sand compacting chamber arrangement with a dashed illustration of the changing position of the chamber arrangement in the present case preferred embodiment and with a compacted sand mold in its ejection position shown in dashed lines,

10 shows the oblique view of the compression chamber arrangement with a second embodiment for a compression cylinder in which the same model. pivoted in an oscillating manner about an axis by approximately 180 ° with each oscillating movement of the chamber arrangement and with an ejector, in which the operation of ejecting the sand molds recognizable by means of the ejection device on a platform or a transport device is,

11 shows a representation similar to FIG. 9 with the compression chamber arrangement in the other position, from which one can determine the relative position of a finished mold to the compression chamber in which it was formed, can see

Fig. 12 shows a sand mold ejector and a core set z device according to the invention, seen from the front, partially sectioned, wherein the ejector is shown withdrawn from a compression chamber, and a resiliently supported one Support member for cores can be seen inclined from a roller for refilling To enable cores

Fig. 13 is a view similar to Fig. 12, wherein the ejector in their vertical ejection position shortly before the core is inserted into the recesses

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is set back in the Sadform and

Fig.I ^ a view similar to Fig. 13> in which you can see how the cores are inserted into the recesses and the sand mold formed last from its compression chamber is expelled.

In the drawings, similar or identical parts are given the same identifying marks throughout. 1 and 2, a sand molding machine according to the invention is indicated generally at 10. The sand molding machine 10 has a frame 11 to which the spaced-apart lower frame legs 12 and Ik belong. An upper frame leg 16 extends across the molding machine 10.

In Fig. 1 you can see a left frame leg 18 and a right frame leg 20, which are located between the upper frame leg l6 and each one of the lower frame legs 12 and 1 *} extend.

At a distance sideways inwards from the left frame leg ' 18, a holding element 22 extends downward from the upper frame leg 16. A similar holding element 24 is located to the side inward at a distance from the right frame leg 20 and also extends from the upper frame leg 16 downward.

Einr.Stüt ze leraent 26 protrudes upward from the lower frame leg 12 directly below the holding element 22. In a similar way, a support element 28 protrudes below the holding element 2k upwards from the lower frame leg Ik ; considerations still follow regarding the selection of the length of the holding elements 22, 2k and the support elements 26, 28.

Even if the mentioned elements 22, 2k, 26 and 28 in Fig. 1 are fastened with the help of lugs and rivets, this is the case

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not of importance and can / also in other conventional Manner, if you go to a frame station as described above or to one of the functionally equivalent Construction with various advantages want.

The holding elements 22 and 24 have in the central area of the frame 11 a distance from one another that provides sufficient space for the free movement of articulated lever groups arranged in pairs 30 there.

According to FIGS. 1 and 7, each articulated lever group 30 contains a pair of spaced-apart upper articulated levers 32 which are used for Pivoting are attached to lugs 34, which with the help of Bolts 36 are attached to the upper frame leg.

Each upper link arm 32 of the link arm groups 30 is pivotable with a corresponding lower articulated lever 38 with Connected by means of bolts 40. A compression cylinder is attached between the two bolts 40 of the articulated lever groups, the total length of which can be set up optionally.

Each lower articulated lever 38 in the articulated lever groups 30 is fastened by means of a bracket 46 to a cover plate 44 with the aid of bolts 48. In Fig. 7 it can be seen that the cover plate 44 can be raised or lowered in the vertical direction with the aid of a corresponding increasing or decreasing length of the compression cylinder k2. When the compression cylinders are in the retracted condition as in Fig. 7, the upper and lower link arms 32, 38 are in their vertical positions and hold the cover plate 44 in a lower position thanks to the increased overall length of the link arms connected in series. If, on the other hand, the overall lengths of the compression cylinders are increased, as indicated by 42 in dash-dotted lines, then the bolts 40 are forced outwards and take the upper and lower articulated levers,

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as shown in dashed lines, an inclined position where they are designated by 32 'and 38'. The inclined positions of the levers in the articulated lever group reduce their total length in the vertical direction, whereby the lifting of the cover plate 4l is effected into a position which is shown in dashed lines and denoted ^{by 44 f.} When the plungers of the compression cylinders 42 are drawn in in a conventional manner (not shown), the cover plate 44 is lowered. The lowered cover plate engages in a compression chamber. as shown in FIGS. 3 and 7 and as will be described in detail below. However, the special design of the toggle assembly 30 is not a special feature of the present invention unless they cooperate with the compression chambers, as will be described. A detailed description of the articulated lever groups can be found in the above-mentioned USA applications 114 993 and 144 823.

The cover plate 44 has a sand outlet 50 through which sand is blown in a compression chamber. The sand outlet 50 iat in connection with an outer tube 52 which is fastened to the cover plate 44. The outer tube 52 can thus move up and down together with the cover plate. A static inner tube 54 is at least partially housed within the outer tube 52 with sufficient play, so that the inner tube 54 can slide back and forth in the outer tube 52. For this you can use appropriate bushings between the outer surface of the Innenrohr.es 54 and the inner surface of the Provide outer tube 52 of which sand is prevented from being blown through a gap between the two tubes will. The inner tube 54 can be connected to conventional sandblasting equipment. With such a construction, a well-sealed blowing path for the sand is made, as is that is present when the cover plate 44 with its sand outlet opening 50 is moved back and forth in the vertical direction.

A plurality of sleeves or collars 56 slide on the side Frame legs 18 and 20.

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An upper guide shaft 58 is mounted with one free end in an upper sleeve or collar 56, while the other free end extends through an opening in the holding element 22 and is carried by the latter. Similarly, a guide shaft 60 is held by the holding element 24 and legs 20 in the right frame. The guide shafts 58 "and 60 are advantageously ¹ , at the same height and are both aligned one after the other in the horizontal direction. In this embodiment, the guide shafts 58 and 60 are fixed in their position and cannot move linearly and at an angle. Each guide shaft 58 and 60 have an axis and both are coaxial with one another.

Located immediately below the guide shafts 58 and 60 a long shaft 62 which extends over the entire width of the molding machine 10. The - ^ longitudinal shaft 62 is supported by their both free ends in the sleeves 56, and the central area stored in the support elements' 26, 28 (Fig. 1).

To simplify the description of the molding machine 10, the Longitudinal shaft 62 has been given special reference symbols to designate its individual sections. So is the section of the prop shaft 62 between the left frame leg 18 and the support element 26 denoted by 62a. In a similar way, the area of the longitudinal shaft 62 between the right frame is legs 20 and the support element 28 denoted by 62c. The reference numeral 62b bears the area of the longitudinal shaft between the bearings in the support elements 26 and 28. Of course, the areas mentioned can also be independent shaft pieces.

Just like the guide shafts 58 and 60, the longitudinal shaft 62 are fixed in their position, so that neither in Can move lengthways or rotate.

A bearing sleeve 64 is supported on the guide shaft 58 and one Bearing necks 66 in a similar manner on the area 62a of the longitudinal shaft 62. Furthermore, bearing sleeves 68 and 70 are sliding on

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the guide shaft 60 and the area. 62c stored.

A vertical support rod 72 is fixed to the Eager sleeves 64 and 66 and a support rod 74 in the same way to the bearing sleeves 68 and JQ-. tied together. The bearing sleeves and consequently the vertical support rods 72 and 74 can be moved to and fro in the horizontal direction. Suitable means (not shown) can be provided to reduce the friction forces between the various bearing sleeves and the associated shafts when sliding.

Connected to the support rod 72 is a multiple compression molding cylinder 75 j which has some importance in the context of the invention. In Figs. 1-6 and 8 you can see that a Multi-shape compression cylinder 75 has a carrier 76 of angular shape whose arms, which are designated with 76a and 76b, stand perpendicular to each other or at an angle to each other and support the shape. Similar is with the support rod 74 a multiple compression cylinder 74 connected, the one Carrier 78 has the shape of a rectilinear angle, the both arms 78a and 78b are perpendicular to one another. The multiple compression cylinders 75 and 77 will be described in more detail. Suffice it to say here that the compression cylinders are used for compacting molding sand and that the models for this purpose on the Formverdicbltungszylindern angeord are net.

The reciprocation of the compression cylinders 75 and by means of which each of them is brought into positions inside and outside the compression chambers, with the aid of a yoke 80 causes held by the support rods 72 and 74 will. Each yoke overlaps the associated cylinder and is connected to the respective support rod.

A plunger 84 of a hydraulic cylinder 86 is attached at its free end to the yoke 80 and is similar the plunger rod 88 of the hydraulic cylinder 90 on the yoke

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attached (Pig. 1-6). Conventional means (not shown) are used to actuate the cylinders 86 and 90 which reciprocate the respective plungers 8 * 1 and 88 in accordance with a predetermined frequency or period. As can be seen in Fig. 2 that the retraction of the plungers 8 * 1 and 88 takes place with suitable control of the associated hydraulic cylinders 86 and 90, that the model carrier J6 , as can be seen in FIGS. 1 and 2, to the right and moved out of the compression position to the left. Similarly, the retraction of the plunger 88 will move the carrier 87 in a rightward direction out of the overall compression position.

The arm of the model carrier 76 carries a model 92 (shown schematically) * and is further with a projection forming the riser 9 * 1 on the arm 76a then on the model carrier arm 76b Mistake. The model carrier arm 76b, which is also part of the model carrier 76, holds a model 96 and a riser forming protrusion 98. The riser forming protrusion 98 is "in the preferred embodiment on the side of the Arm 76b carrying the mode 11 adjacent to the one carrying the model Arm 76a attached.

The arm 87a includes a model 100 for compacting the sand and

a protrusion 102 to form the riser during which the

Model carrying arm 87b a model 10 ¹ I and a riser

contains forming protrusion IO6.

This construction of the multiple compression cylinders 75 and 77 is an important feature of the present invention. The compression cylinders 75 and 77 can also.! with advantage in one Sand molding machine 10 can be used as described, then the compaction cylinders 75 and 77 can, as will be understood results in other types of molding sand compacting machines VerT find application. However, particular advantages are achieved if the compression cylinders are used on a machine which will now be described.

Both model carriers 76 and 78 are mounted for pivoting by rotating about the respective axis of the support rods 72 and 7 * 1. There are

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Means not shown are provided with which the model carriers can rotate or pivot about their respective support rods. The purpose for which the supports 76, 78 are pivotable nm vertical Axes are mounted is set out much more below. Each of the arms 76a, 76b, 76a, 78b that hold the models form in FIG effectively special or different compression cylinders, that carry individual compression models. The process of compacting sand molds is known per se and: already in in the aforementioned United States patent applications.

Now the operation becomes the multiple compression cylinder 75 and 77.

The hydraulic cylinders 86 and 90 are operated synchronously so that the plungers 44 and 88 are simultaneously retracted or move to the extended positions. The retracted conditions or positions of plungers 84 and 88 are in the pig. I and 2 shown. When retracted into the retracted positions, the plungers force the associated yokes 80 and 82 to move away from the To move outward the central area of the sand molding machine 10 where the compaction is carried out. It is important that the beams 76 and 78 the compression chambers, which are centrally located in the Sand molding machine 10 is fully released when plungers 84 and 88 are driven to their fully retracted positions are what will be explained.

When the compression cylinders 75 and 77 are moved out of their compression positions (Figs. 1 and 2), each of the Carriers 76 and 78 have sufficient freedom to move around the respective does z rod 72 and 74 rotate © to be able to swivel. To the To facilitate the description of the operation of the sand molding machine 10, the compaction axis is in the same extension ~ " with the axes of the hydraulic cylinders 86 and 90 aligned one after the other. The compression axis is used for this purpose is assumed to be the axis along which the individual model support arms move as they reciprocate in and out of the compression position. In other words, the compression

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axis with the line of movement of the individual plungers 84 and 88 when they go back and forth along a horizontal line which runs approximately through the center of the Compression chamber runs.

One possible arrangement of the supports 76 and 78 is shown in FIGS. 1 and 2 where the molds 92 and 100 face each other and the compression chamber to be described. The models 96 and 104 are in this position in the same direction, namely the front of the sand molding machine as seen in FIG. In such positions The models 92 and 100 are ready to take sand from opposite sides Condense pages in accordance with the basic principles of condensing, as described in the aforementioned United States patent applications is described.

Optionally, bracket 2: i ^: -76 "can be rotated 90 degrees counterclockwise as seen in Figure 2, and bracket 78 can be rotated 90 degrees clockwise to place models 96 and 104 in the positions which were previously assumed by the models 92 and 100. Such positions of the supports 76 and 78 are suggested in FIG.

While models 92 and 96, similar to models 100 and 104, may be similar, it is clear that this is the case with the Invention has no particular meaning and that any combination of similar or different models of a '! of the arms 70a, 76b, 78a, 78b can be carried. In effect offers the arrangement of multiple compression cylinders 75 and 76 enlarged adaptable texts to the number of possible sand formations that you want to get to. Also, as is to be seen, the production of more than a kind of sand molds allows * Furthermore, it should be the expert it will be understood that although the supports 76, 78 have been described as having two support arms and a model on each one and the same, the number of carrier arms of each model carrier can be increased to improve maneuverability and adaptability.

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to increase the ability to make sand molds. For example one could use the carrier with additional, spaced-apart arms in a generally common One level, or one could provide additional, spaced support arms in more than one level, so that different models of the same in positions can be brought along the compression axis by moves the carrier in two or three dimensions.

Once the cover plate 44- is lowered onto the compaction chamber and sand has been blown into it through the sand outlet 50, the models facing the compaction chamber along the compaction axis can be moved inward towards each other and into the compaction chamber in order to close the sand condense. This is accomplished by appropriate actuation of hydraulic cylinders 86 and 90, thereby extending plungers 84 and 88 each with sufficient force to produce the desired compression pressure. The plunger 84- and 88 are shown in their extended states or positions in Figs. 3> 4, 5 ₅ 6 and 8. From this it should be seen that the multiple compression cylinders perform both linear and angular motions. The linear motions each of the compression cylinders makes correspond to the motions affected by the actuation of hydraulic cylinders 86 and 90 between their extended and compression positions will. On the other hand, the compression cylinders make angular movements _r around the respective support rods, so that different models attached to the beams can be brought into correspondence with the compression axis.

In addition to the ability to create more than one type of sand mold, the use of the multiple die compression cylinders 75 and 77 results in the production of the same type of sand mold at a much higher speed and efficiency, as will be seen below.

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Ale another important feature of the present Elf indun.j is a new compression chamber assembly 108 is provided, shown in FIG Figures 1-11 is shown. One sees best in Figs. 8,9, 10 and 11 that the compression chamber assembly 108 a Chamber support 109 contains, which / in the present case preferably Embodiment is of rectangular cross-section and has two pairs of opposing surfaces that are mutually stand mutually perpendicular.

7, one of the surfaces 109a of the chamber support 109 has two spaced parallel walls 110, 112 protruding therefrom. The feet 110 and 112 and the surface 109 together form an open compression chamber 113 with two open sides and an open top. In the same way, two spaced parallel walls 114-116 protrude from the surface 109b, which together with the surface 109 form an open compression chamber 118 which has two open sides and an open top. As previously described, the open sides can accommodate arms for the ~ models * while the ...... open top of the respective compression chamber can be closed by its cover plate 44.

The chamber bracket 109 is pivotally mounted on portion 62a of a shaft, but the compression chamber assembly is with respect to the shaft 62 and a relative displacement to it in a fixed position.

1, 3 and 7, an arm is provided on the chamber support 109 which is pivotably connected to a plunger or to the connecting piece 122 of a power or hydraulic cylinder by means of a bolt 126. The connecting piece 122 or the plunger is shown schematically in FIG Fig. 7 shown. Upon actuation -the hydraulic cylinder 124 causes the extension or the Einfahrendes plunger 122, that the chamber support 109 rotates the shaft 63b in the clockwise or counterclockwise to Uhrzeigex'sinn • the area.

In Figs. 1-5 and 7-10, the chamber support IO9 is in

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one of his positions. The chamber 113 is located directly above the shaft region 62b and is aligned to the compression axis. The Verdiclitungskammer is in such a position 108 to the side of the shaft area 62b. This position is with ejection position in the sense of the present Description and the claims. It should be noted that the compression chamber 113 is in its compression position is raised immediately above the wall 114 of the chamber 118. This means that there is no vertical overlap between the two chambers. This consideration is important, as will be discussed later is explained. The chamber support 109 is rotatable or pivotally mounted on the area 62b of the shaft, which is secured against any movement. Becoming plunger or connector 122 moved in the direction shown in Fig. 7 with 122 ', then the - chamber support 109 rotates around the Area 62b of the shaft and brings the chamber 113 into an opposing lateral ejection position with respect to the area 62b of the shaft to that of the chamber 118. Therefore, the chamber 118 moves from its ejection position to the compression position, as can be seen in FIGS. 6 and 11.

The compression chamber assembly 108 can be explained as being capable of oscillating angular movements about the area 62b the shaft is mounted. As already described above, the supports 76 and 78 are attached so that they are roughly linear reciprocating motion as well as an angular oscillating motion around a respective support rod 72 and 7 ^ - perform can. The actuation of the hydraulic cylinders 86, 90, 124 and the means not shown for oscillating Angular drive of the carriers 76 and 78 are advantageously synchronized, just like the movements of the pair of lever groups 30, which continuously and effectively compacts and ejects sand molds.

It becomes a complete operation of the sand molding machine 10, wherein two sand molds are made

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The sand molding machine according to FIGS. 1 and 2 is in the starting position, where the chamber 113 is in the upper compression position and the chamber 118 are in the lower lateral starting position. Correspondingly, the arms 76a and 76b of the wearer of the Model along the compaction axis with arms 76b and 78b in their idle position. The work schedule starts with reducing the overall length of the hydraulic cylinders 42, with which the cover plate 44 for contacting the upper edges the chamber walls 110 and 112 is lowered. Grooves or slots 44a and 44b are preferably provided in the cover plate 44, which are designed to insert into the open top of chamber 113 and to fit sealingly therein. Now will be the hydraulic cylinders 86 and 90 operated so that the arms 76a and 76b of the model carrier enter the open sides of the compression chamber 113. This is a completely closed one Compaction chamber was created and the sand can pass through the sand r. outlet 50 are blown in via lines 52 and 54. Is enough sand is blown into the chamber, then the hydraulic cylinders 86 and 90, in turn, are actuated and run through "a working path, whereby they 'a high compression or high compression Put forces on the sand in the compaction chamber using the 92 and 100 models.

When the compression is complete, the two Hyraulikzy cylinders are left 86 and 90 retract their respective plunger rods 84 and 88 to re-insert the supports 76 and 78 for the molds to return to the positions shown in FIGS are. The process of compaction is best seen in FIGS. 3, 4, 5 and 8.

Obtained in the preferred embodiment of the invention now the carriers 76 and 78 as well as the compression chamber 108 an angular movement about their respective axis. In order to means are provided (not shown) with which one can use the Carrier arms of each carrier can transfer from the initial position to the n-new position, which is shown in Fig. 5 with dashed lines

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nien and reference numerals 76a 'and 78a' indicated, ip-c. Pamis the carrier 76 rotates 90 clockwise when viewed from above and the carrier 78 moves 90 clockwise in FIG the positions shown in FIG.

At the same time with the angular movements of the model carriers 76 and 78 also includes compression chamber assembly 108 itself in Angularly moved or pivoted about their respective shaft range 62b. In detail, the chamber carrier 109 rotates counterclockwise by 90 °, as can be seen in FIG. 7. As well as the starting position as well as the following position are arranged in the sealing chamber in Figs shown. In each figure, the change position is shown in dashed lines and the reference lines are marked with a corresponding one Index line provided.

Are the angular positions of both the model carrier arms and of the chamber carrier 109 comes to an end, then the hydraulic cylinders 86 and 90 can again be actuated at the same time as the hydraulic cylinders 42 to form an enclosed compaction chamber 118 into which sand can be injected. The hydraulic cylinders then operate 86 and 90, in turn, as in the case of chamber 113, one Power stroke to compact the newly filled sand.

Simultaneously with the process of compacting the sand in the compacting chamber 118, suitable means, which will be described below, can be used are used to eject the previously formed sand mold, which is now in the compression chamber 113 is located.

The further angular movements of the model carriers 76 and 78 both as well as the compression chamber arrangement 108 in the starting positions, as just described, form a complete cycle of the oscillating parts. With the production of a third Sand mold in the Heihe can be the second sand mold in the compaction chamber 118 can be ejected with compaction means similar to those used to remove the sand mold from the

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Chamber 113 to eject.

It should be noted that a complete cycle of the overall molding machine 10 also, a complete oscillatory cycle of the Eodellträger76 and 78 and of the carrier 109 "conditional. Each oscillatory The cycle of the last part is determined by two "90 °" movements, one in a first angular direction and the other in an opposite angular direction.

The purpose of the multiple compression cylinder is clear from what follows and multiple compression chamber arrangements can be provided.

A variation of the compression cylinder previously described " is shown in Fig. 10. Here are model carriers and 140 are provided which support models 136 with protrusions 138 for forming risers. Supports 132 and 140 are fastened on © lunge rods that support the plunger rods 84 and 88 are similar. Even if only one set of models 136 is provided, the models can be rotated 180 ° in their plane rotate by sliding the rods or shafts 134 and 142 around their Axis rotates. Otherwise, the compression arrangement is similar to that previously described, and the rods or shafts 134, 142 the beams 132 and 140 can be arranged in a linear fashion along the Move the compaction axis back and forth to compact the sand as described above. This arrangement looks in the end effect two different forms. For reasons which will be set out, it is more important that this arrangement, like the previously described multiple compression cylinder adjusting the projections to form the risers on each other opposite walls of the compression chambers with subsequent compression processes.

From Figs. 2, 4 and 5 it can be seen that the projections 94 and 102 for forming the risers on walls 112 of FIG Chamber 113 lie. As a result, after the sand mold has been compacted, the riser holes are close to the wall 112. Anhand

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10 and 11 it can be seen that when the chamber 113 is in its ejected position, the wall 112 becomes the overhang of the chamber and that the mold 150 which has been made in the chamber is a model 154- on Side and a riser hole portion 156 at its top. If, on the other hand, the model ^{supports 76 and} 78 and Q.6I "chamber supports 109 are rotated at an angle, as described above, then the projections 98 and 106 forming the riser come to the wall 114 of the chamber 118. It follows that that the riser hole in the compacted sand mold is on the wall 114.

During the next molding process, which takes place in the compression chamber 113, the chamber 118 is brought into the ejection position (FIGS. 1-5 and 7-10). In the discharge position of the chamber 118, the wall 114 so that the risers holes of the mold which is formed therein \ to the upper wall of the chamber: ■ ... reach the upper surfaces.

In Fig. 10, an ejector 144 is shown schematically. It consists of an ejector 146 on a reciprocating Wave 148. The action or pacing of the VJeIle 148 is coordinated with the other operations of the sand molding machine or synchronized. The ejector 146, which will be described in more detail later, has surface portions which are dimensioned to be to apply the compacted mold within a compaction chamber and slide the mold out of the chamber on a conveyor or sliding a platform 128 or 130 as shown in Figs. Similar sponsors or platforms are on either side of the compaction axis or on either side of shaft 62. Referring to Figure 8, it can be seen that the conveyors 128 and 130 have parts 128a, 128b and 130 a and 130 b. The conveyors 128 and 130 have parts 128a and 128b and 130a and 130b. A gap 128 is provided between the parts 128a and 128b, as is a corresponding gap 130c between the parts 130a and 130b. The gap 128c is positioned and sized to properly receive the wall 110 when the chamber 113 is in the

409881/0351

Ejection position is. Similarly, a gap 130c is also formed and sized to receive wall 116 when the chamber 118 is in the eject position. It is advantageous if the walls 110 and 116 the corresponding gaps 128b and 130c fill in full, creating an approximately continuous Conveyor or an approximately continuous platform is created on which compacted forms are slidably transported can.

In FIG. 10, only individual conveyors 128d and 130d are provided, each of which corresponds to the parts 128a and 130a of a conveyor .

In either case, an appropriate ejector 144 forces one compacted form in a corresponding chamber on a conveyor, the free end of which with the bottom wall of the corresponding Chamber is in contact or is in close contact with it when it is in the eject position. With the constellation described above it is possible to have two compacted molds 150 spaced apart for each full cycle of operation of the sand molding machine Eject conveyor. Since the conveyance takes place on a stationary conveyor, the ejectors do not only bump a last compacted sand mold, but force this mold against the previously completed molds with the ejection, standing on the conveyor. With continuous operation of the machine, a series of shapes I50 is formed, the are placed close together (Fig. 10), with the pouring funnel or risers lie in the upper surface, which makes it easier to fill with metal.

It should be appreciated that the new sand molding machine is equipped with parts that are simple in construction and highly efficient in operation. It emerged from the description that while one sand mold is being compacted, another sand mold is being ejected xdrd _? and it is not necessary to wait until one operation has ended before the next one begins, as has so far often been the case with corresponding machines

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- 26 who was EaIl. '

A quiet and even operation of the machine is also made possible by a new design within the scope of the invention, in which the ejector 144 and the compression cylinder on two different vertically one above the other work and not disturb each other. This is the reason why the compression and the ejection at the same time is possible. It can be seen in particular in Fig. 10 that the model carrier 132 is at a first height level above the Shaft area 62b and located above the top surface of the chamber 118, as indicated by the top surface of the wall 114 Fig. 10 is determined. On the other hand, the ejector 144 operates at a low level on the side of the shaft region 62b below the level of the wall 114. As a result, the compression cylinders and the ejectors are independent can work from each other and without mutual interference.

The ejector 144, which will be described with reference to FIG. 10, is a schematic representation of a new ejector construction, which is another important feature of the invention. With reference to FIGS. 12-14, a detailed detailed description of an ejector 144 and at the same time given its mode of operation. Even if the ejector 144 * is described as both an ejector device and a core insert device, it becomes clear from the description it will be clear that you can use the ejector on its own as an ejector without them is also used to insert cores in sand molds. The device 144 »for ejecting a sand mold and for inserting a core has a pan-shaped ejection part 146, along the circumference of which a band, a strip or a Delimitation 146a runs. In connection with FIG. 10, it was described that the ejection part 146 is mounted on a shaft 148 sits, which at the same time plunger of a power cylinder or hydraulic

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■■ -.-. 27 - "■

see cylinder 160 is. With suitable actuation of the cylinder 160, the ejection part 146 can move in a horizontal direction from a retracted position as shown in FIG. 12 into an extended and ejection position, as in S ¹ Ig. 13 and 14 shown, move back and forth. The device 144 'for ejecting the sand mold and for inserting cores consists of a frame 158 which is preferably rigidly connected to the frame 11 in a suitable manner. Although only one device for ejecting sand molds and for inserting cores is shown in FIGS similar devices for ejecting sand molds and inserting cores can be provided. The ejector and the core inserting device. direction are associated with a conveyor or platform 162, the upper surface of which extends in the same position with the upper surface of a bottom wall of a compression chamber when the latter has been transferred to its lateral discharge position. This is made clear with reference to FIGS. 8 and 10.

A significant improvement to the ejector 144 that 10 is the arrangement of a pivot pin 164 around which the ejector 146 is pivotable a shaft 148 is mounted. In other words, the ejection member 146 is about a pivot 164 or about a horizontal one Axis mounted rotatably.

On the conveyor platform 162 there is a tilting roller 166 which engages in the lower area of the ejector part 146, when the shaft 148 is moved fully to its retracted position. This position of the discharge part 146 becomes here marked with core insertion position. Under the action of the roller 166, the ejector 146 inclines into the angular position for inserting the cores. The reason for this inclination of the discharge part 146 will be explained below.

409881/0351

As previously stated, angular movement about pivot pin 164 is provided by the relative linear movement between the Ejection part 146 and the skew roller 166 restricted. When the ejector 146 advances from the position for inserting the cores to a position for ejecting a sand mold, then the angular movement about pivot pin 164 is through a spring 163 influences. The spring 168 is connected to the ejector 146 and to a holder 17O that is attached to the shaft 148 is attached. The ejection member 146 is resiliently urged by the spring 168 so that it is around the pivot pin 164 rotates clockwise (Fig. 12). An extension 170a as part of the holder 170 prevents excessive rotation of the ejector part 145 clockwise. The rotation ;;: of the ejector part 146 in the clockwise direction comes to an end in the construction shown when the ejection part is in an exactly vertical position or in an ejection angle position, as shown in the fig » 13 and 14 can be seen.

The extension 170a and the roller 166 must be in the transverse direction = be at a distance from one another as seen from the platform 162, so that the extension 170a does not get in the way of the roller 166, when the shaft 148 extends and the extension 170a moves behind the roller 166.

Hit the pan-shaped ejection part 146 is a pan-shaped carrier 172 for the cores connected in a similar manner with a peripheral projection or edge 172a is provided. While If the height of the peripheral edge 172a is less than the height of the strip 146a, then the strip 146a and edge 172a come along Preferably in contact with one another and form a seal against pressure medium or compressed air with one another. However, the carrier is 172 for the cores with preferential sliding on the bar 146a assembled. Even if one has any preferred for the core carrier 172 or generally used material, so in the preferred embodiment more the

409881/0351

Turning of elastomeric plastics into consideration.

Between the support 172 of the cores and the ejector 14-7 are Springs 174 · provided so that the core support 172 is opposite can yield to the ejection part. Pedem 174- strive to a movement of the core support 172 over a center position addition (Fig. 12) in Kiclrtrung towards the ejection part • prevent. In this position there is some repulsion between the peripheral edge 172a and the flat rear side of the ejection part 14-6, as in the IPig. 12 and 13 can be seen.

There are numerous openings or on the core support 172 Holes 176 paseend to receive parts of the cores 178 are. The arrangement of such holes 176 is for the The purpose of the present invention is of little importance and one can use any other suitable means by which a core is held reliably and releasably on the core carrier 172, wherein there are of course differences in the expediency. Man sees how cores 178 are plugged onto core carrier 172, after the latter has been replenished with kernels. The use of the kernels is well known and the training of the shapes by means of suitable models, which also leave recesses for receiving cores, is known. In Fig. 13 you can see two forms I50 on a conveyor or platform 162c, which has a common separating surface 152 and guiding funnel or have riser hole I5.6. Recesses 172 can be seen for receiving cores on the form 154 · ', the furthest is on the right. The cores 178 bridge the interface 152 and sit in recesses of two adjoining sand molds. The area on the far left of the shape I50 on the Platform or conveyor 162c is shown receiving portions of cores 178 in correspondingly shaped recesses 172, while other core parts are exposed outside and extend outside to the left in positions where they enter the recesses the subsequent form to be used are (Fig. 13). It has already been mentioned that between

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Ejection part 146 and the pan-shaped core carrier 172 Cavity is provided. The interior of the cavity is externally exposed to a vacuum or to a pressure through a line 180 connected. Line 180 is from a conventional source of vacuum or pressure.

The operation of an apparatus will now be described 174- 'for ejecting sand molds and inserting cores. Following the ejection of a mold and insertion of cores> -wave 14-8, as shown in Fig. 12, becomes voluminous withdrawn. It has already been written that the roller-.166 engages at the bottom of the ejection part 146 and this inclines counterclockwise against the action of a spring 168, as in FIG Fig. 12 shown. This pivoting or winking movement about pivot pin 164 also tilts core support 172 into one position between a vertical or horizontal. This position is called the core deployment position. At this time you can Cores 178 are inserted into the holes 176. The purpose, too to which the core support 172 is inclined is twofold. First the inclination makes it easier to insert or refill the cores because it makes the core carrier more accessible. To the second, the insertion is also made easier because the kernels with their own weight or under the action of gravity can fall into the holes 176. The possibility, that the often very delicate kernels 178 fall out of the core support, has moved into the distance.

When all cores 178 are inserted, line 180 and thus also in the cavity which is enclosed by the ejection part 146 and the core carrier 172, a vacuum is formed Pressure drop helps hold cores 178 in the holes once the core support is generally perpendicular Alignment is obtained as shown in FIG.

When a mold 150 is made in the compression chamber 118

Chamber by 90 °,>

409881/0351

has been, the chamber is turned 90 °, as described above, into the

Positions after. Fig. 13 pivoted, wherein the wall 116 is extends in the same position with the conveyor part 162a and 162c. In this position there is a gap 162b originally between the two conveyor parts 162a and 162c, completely filled by the wall 116.

Once the chamber 118 has reached its ejection position according to FIG has reached, the shaft 148 is extended. An intermediate position of the shaft 148 is shown in FIG. When the wave extends to the right, the ejection member 14-6 begins to "ink clockwise" under the action of the force of the spring 168 Pivot pin · 164- to rotate. This rotation continues until the lower part of the ejection part abuts the extension 170a, where the ejection part is fixed in a perpendicular upright angular position.

13 and 14 it can be seen that another Action of the ejector 146 has the consequence that it is in an open Side of the chamber 118 enters and allows the aligned cores 178 to retract into the recesses 172. At the initial Retraction of the cores 178 into the recesses 172 is in the A vacuum is still maintained in the cavity between the parts 146 and 172. However, it is advantageous if, as soon as the parts of the cores 178 are inserted into the recesses 172, from which they can no longer accidentally fall out, the vacuum originally applied with the line 180 with suitable Means is converted into a pressure. When the cores 178 are more or less completely seated in the recesses 172, the ledge 176a pushes the ejector portion 146 against the mold 150 or engages and slidably pushes the mold out of the chamber 118, the mold from the wall 116 onto the portion 162c of the conveyor is pushed over. About ejecting the form to relieve and prevent damage to it, if only raw Forces exerted against the band of the mold via the ledges "146" distribute the forces necessary to eject the mold are necessary over the entire - ^ surface of the form by placing the

/ 409881/0351

Brings core support 172 to rest on the mold. However, xiregen the generally soft nature of the pan-shaped core support 172 gives the pressure inside the cavity or behind the core support 172 is built up, sufficient support, which does not result in the core carrier being deformed by bulging or in any other way.

The reason why you have the core support 172 within the peripheral edge 172a of the ejection part 146 is resiliently and slidably mounted, can be seen that slight movements of the core support 172 and consequently also the cores 178 are possible if these look for the recesses 172 intended for receiving the cores and align yourself with it. During the ejection stroke, however, the core carrier 172 is completely accommodated in the circumferential flange 172a, wherein the peripheral edge 172a engages the rear surface of the ejection member 146, as shown in Fig. 14-.

There you can see that the shaft 148 extends further and passes through the chamber 118 and the last one formed Mold 150 standing in chamber 118 pushes out. This side Movement of the mold 150 causes other shapes 150, which are on the part 162c of the conveyor, in the same In the same way as in the ejection direction. When the last formed shape I50 is fully on the part 162c of the conveyor is, the shaft 14-8 is withdrawn again, passes through the chamber 118 in the direction of the position generally shown in Fig. 12 is shown. It has already been described that when entering in this position the lower part of the ejection part comes into engagement with the roller 166 and this the core carrier 172 in brings its inclined position for filling with seeds. Here is a description of the complete process of ejection and inserting the cores and also the core refill operation. Even if the device for ejecting a sand mold and related to the insertion of cores with the use / compression chamber 118 of the above Compression chamber assembly 108 has been illustrated, it should be evident that device 174 '

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- 33 -

useful in other known fori machines as well can be.

Changes and deviations from the Imposing the constructions described here, but the description applies only to a preferred exemplary embodiment and serves only to explain the invention and not to limit it.

Patent to sayings

4098 81/0351

Claims (31)

.Patent claims: 1) Sand forming machine with a compaction chamber, a carrier for a mold or a core and a compression cylinder, characterized by a ge pivotably arranged chamber carrier (109), which can be moved in an oscillating manner in two angular positions, by a first and at least one second sand mold compaction chamber (113,118) carried by the chamber bearer and the one at the angle are arranged at a distance around the pivot axis of the chamber support, so that the compression chambers oscillate in a sand filling position and a sand compaction position moved in an angular position of the chamber support and then in a sand mold installation in the other Angular position of the chamber carrier can be moved. 2) Sand molding machine according to claim 1, denote d'a by g e et that the chamber support (1O§) is a block through which a fixed shaft (62) extends, on which it is rotatably arranged. 3) sand molding machine according to claim 1, characterized geke nnzeieh.net, that the chamber support (109) is a block and that it is fixedly arranged on a rotatable shaft (62) is. 4) sand molding machine according to claims 1-3, characterized gekennzeichn et that the chamber support (109) is a block with a plurality of surfaces (109a, b) which around its shaft "(62) are arranged around and its first and further chambers (113,118) of standing at a distance Walls (110,112,114,116) are formed, which protrude from the surfaces and the chambers (113, 118) with open sides and an open top, of which the open sides for receiving the compression cylinders (75,77) and the open top is sized to accommodate the sand that 409881/0351 is to be compacted and provided for closing with a cover plate (44) in the sand molding machine (10) is. 5) sand molding machine according to claim 4, characterized in that that the walls (110, 112, 114, 116) protrude from two surfaces (109a, b) of the block (109), which are in pairs at an angle of 90 to each other. 6) Sand molding machine according to claim 1, characterized by an oscillating drive (120-126). which moves the compression chamber (113, 118) between the first and second positions, and a chamber bracket (109), which is rotatable about a horizontal axis (62), so that the one angular position above the axis and the other angular position is provided below the axis. 7) sand molding machine according to claim 1, characterized in that that each of the two compression chambers (113 »118) in the one angular position on upper end is open, and that a cover plate £ 44) in the machine is vertically adjustable, which is the upper opening of the respective compression chamber during compression s concludes. 8) sand molding machine according to claim 1, characterized in that that each compression chamber (113 »118) has two opposite open sides has that two compression cylinders (75 ^ 77) are opposite each other on one side of the chamber support (IO9) and on the open side of the compression chambers are extendable, for which purpose the compression cylinders are arranged and dimensioned so that they pass through one of the open The sides of the compression chimneys can pass through, if this is in an angular position for compaction 409881/0351 from Sana "is located previously in the compression chamber has been filled. 9) Sand molding machine according to claim 8, characterized in that each of the compression cylinders (75, 77) carries more than one model (92,96,100,104). 10) Sand molding machine according to claim 9i, characterized in that a Hodellträger (76, 78) is attached to each compression cylinder (75i77) and can be pivoted between two angular positions about an axis (72, 74) which is perpendicular to the axis (72 ) stands about which the chamber carrier (109) is rotatable, that first and second models (92, 96, 100, 104) are distributed at angles around the pivot axis of the model carrier, that a model on a model carrier in a sand compaction position in one of the angular positions of the model carrier is adjustable and the other pattern can be moved into the compression position in the other angular position of the model carrier, and that a drive (84, 86,88, 90) for the reciprocating angular adjustment of each model carrier (76,78) between the two angular positions each sand molding process is provided, and that there is a gate direction for linearly reciprocating the model carriers, which the models (92, 96, -100, 104) in the overall compression position of the model carrier through the open side of the compression chamber (i13, 118), which is in the one angular position, and withdraw the models from the compression chamber after compression. 11) compression chamber according to claim 10, characterized in that that the model carriers (76, 78) and the compression chamber carrier (109) are reciprocated synchronously so that each set of models 409881/0351 (92, 96, 100, 104) on similarly oriented model supports one of the compression chambers (113, 118) is assigned. 12) Sand molding machine according to. Claim 11, characterized in that g e ■ * · denote that the first and second models (92, 96, 100, 104) with before jumps to shape of risers and pouring hoppers (94, 98, 102, 106) are equipped that the first and second models around 180 ° offset so that the Yorsjünge are close to each other opposite walls (110, 112, 114, 116) come, the two compression chambers (113, 118) form, so that one ejected on each side of the chamber support (109) Form has riser holes or spouts (156) on their upper surfaces. 13) sand molding machine according to claim 1, marked t d u r c h · a mold ejection and ke my setting device (144, 144 ') with an ejection part (146) which can be pivoted generally in one plane, with a core carrier (172), the resilient on the ejection part (146) on a its sides is fixed and against the one to be ejected Form (150) abuts, and thereby the core support holes (176) for. releasable support from at least one Core (178) and for releasing the core when the ejector member (146) is pressed against a sand mold that ejects is to be and contains the holes (176) for receiving cores and by a device (164, 166, 168) for pivoting the ejector part (146) into an inclined position as a core filling angle position which has been assumed when the discharge part (146) is completely removed from the sand compacting chamber (113, 118) in its other angular position is withdrawn by a return element (168); with which the ejector about a pivot pin (164) 409881/0351 the core insertion position is pivoted into a mold ejection position when the ejector (146) is in sight of a sand compaction chamber in the other angular position is moved past, finally, by a drive (148) for linearly reciprocating the ejection part (146) between the positions for inserting the cores and compacting the sand. 14) Sand molding machine according to claim 1, marked by compression cylinders (75 ₅ 77) ₅ which are on this side of the compression _{karamer (113 5} 118) in one angular position of the chamber support (109) and which can be moved back and forth to enter and exit a compression chamber in its sand compression position and through an ejection part (146) to each side of the chamber support, each ejection part being moved alternately through a different associated compression chamber and one compression position at a different height compared to the other ejection angle position so that the compression cylinder and the ejection parts can be moved to and fro independently of one another without any mutual hindrance. 15) sand molding machine according to claim 14, characterized in that that an angular position for compacting the sand of the chambers (113,118) is at one level above the axis (62) of the chamber support (109) and the other discharge angle position of the compression chambers at a lower level to the side of the axis of the chamber support are located. 16) Four-axle compacting cylinder for use in a sand mold compacting machine according to claim. 1, marked by a swivel-mounted model carrier (76,78) that goes back and forth between two Angular positions is adjustable, first and second models 409881/0351 (92, 96, 100, 104) on the model carrier, the angle around the pivot axis (62) of the chamber support (109) are distributed, of which a model in a sand compaction position in one of the angular positions of the model carrier and the other model in the sand compaction position in the other angular position of the model carrier is adjustable, a drive to move back and forth of the model carrier in angular positions between the angular positions after each sand molding process and by a Drive for linear forward movement of the model carrier in a direction transverse to its axis on a compression chamber (113, 118) in the wake of each angular movement of the model carrier, so that each model is used alternately to create a sand mold in a compacting line mer to condense. 17) Compression cylinder according to claim 16, characterized in that that with the arrangement of two compaction chimneys (113, 118), "which alternate in a sand compaction position and pass into a sand mold ejection position, the mold carriers (76, 78) synchronous with the movements the compression chambers (113, 118) reciprocate so that the first and second models (92, 96, 100, 104) all come into another compaction chamber to compact sand. 18) Compression cylinder according to claim 17, characterized in that upon compression of the form (1507 in the compression chambers (113, 118) and the discharge each on a different side in the sand compaction position and after turning the mold by 90 ° from the sand compaction to the mold ejection position, each of the first and second models having protrusions (94,98, 102,106) for forming a funnel or Steigers is provided that the models (92,96,100,104) are offset from one another by 180 to the projection in the 409881/0351 Sew opposite corresponding walls (110, 112, 114, 116) that form the compaction chamber, so that sand molds that come out of compaction positions ejected on both sides, the riser holes and funnel holes (156) on the surface wear. 19) sand molding machine according to claim 1, characterized by a model carrier (76,78) which back and forth between two angular divisions around an axis (72,74) is pivotable, which differ from each other by 180 °, by a model (92, 96, 100, 104), the one Projection (94, 98, 102, 106) for forming a funnel or Steigers and which is carried by the model carrier, the projection with the oscillating Movement of the model carrier alternately on both sides reaches the axis, a drive (80, 82, 84, 88) for the reciprocating pivoting movement of the model carrier (76, 78) between the angular positions after each Sand molding process and by a drive for linearly moving the model carrier along the axis (62) in the direction on a compression chamber (113, 118) of the sand molding machine following an angular movement of the model carrier, whereby successively compacted forms create a riser or funnel on another side of the axis to have. 20) Sfer seal cylinder according to claim 19, characterized marked that in the presence of two compression chambers (113, 118), which alternate in a sand compaction position and then a lOrm ejection position arrive, the mold carrier (76, 78) goes back and forth synchronously with the movements of the compression chambers, so that the first and second models (92, 96, 100, 104) all for compacting sand in another the compression chambers become active. 409881/0351 21) compression cylinder according to claim 20, characterized in that that when in the sand molding machine the shapes compacted in each suspect chamber (113-118) have been ejected from the compression position on another side by moving the molds around Rotated 90 degrees from the sand compacting position to the mold ejecting position, each of the first and second models (92, 96, 100, 104) protrusions (94, 98, 102, 106) for forming a funnel or riser that the first Patterns are offset from one another by 180 ° in order to close the projection close to opposing walls (110,112, 114, 116) bring the compression chambers so that those in the sand compaction positions on two. Pages ejected Sand compaction molds have funnel and riser holes on their upper surface. 22) Ejection and core insertion device for sand molds in one Molding machine according to Claim 1, characterized in that it is a generally pivotably mounted in a plane Ejection part (146) in the device (144), a core carrier (172), which is resiliently on the ejection part on one Side is mounted that is attached to the form to be ejected (I50) aii- ' pushes through holes (1? 6) in the core carrier for releasable insertion of at least one core (17 $) and for loosening the Core, when the ejection member is pressed against a sand mold for ejection, the recesses for receiving Contains cores, by means (164 », 166, 168,170) for pivoting inclination of the ejection part in a Angular position for inserting cores, the ejection part from the position for compression in the compression chamber (113, 118) is withdrawn by a restoring element (168) for rotating the ejection part about a pivot pin (164) from the angular position for the insertion of cores into an angular position for ejection when the ejection member moves forward toward the compression chamber 09881/0351 becomes Γ Jind through, a drive to the linear back and forth displacement of the ejection part between a position for inserting the cores and a position for * compacting the sand. 23) Gate direction for inserting cores and ejecting molds after. Claim 22, characterized in that that the ejection part (172) has the shape of a pan and that it has a circumferential strip (I46a) with which it is circumferentially the form to be ejected. 2Pt) device for inserting cores and for ejecting molds according to claim 22, characterized in that the core carrier (172) has openings (176) which are designed to receive cores (178) and the means for easy removal contain the kernels, 25) Device for inserting cores and ejecting Shapes according to. Claim 22, d a d u r eh. Marked eichn e t that the core carrier (172) is made of plastic and at least one opening (176) for receiving one Part of a core (178) contains) 26) Device for inserting cores and ejecting Molds according to claim 22, characterized in that they are e t that the restoring means is a spring (168) which Ejection part (146) urged in the direction of the angular position during ejection and that an extension (170a) is present which prevents the ejection part (146) from moving beyond the ejection angle position under the action of the spring turns out. 27) Device for inserting cores and ejecting Shapes, marked by a mark 40988t / 035t ORIGINAL INSPECTED connection (180) to a source of pressure acting on the core support (172) is exercised if it adheres to a form (I50) that is to be ejected. 28) Device for inserting cores and ejecting Molds according to Claim 27, characterized in that the core carrier (172) and the ejection part (146) come together include a pressure medium-tight chamber and that a line (180) is connected to the chamber, which the chamber connects to a pressure medium source. 29) device for inserting cores and for ejecting molds according to claim 28, characterized by, that through the connection (180) the chamber is connected to a pressure medium source, the pressure of which drops when the cores (178) are inserted before the ejection process, and their bridging increases during the ejection process. 30) device for inserting cores and for ejecting forms, characterized in that the Core carrier (172) on the ejection part (144; 146) is supported by springs and that the relative movement of the two parts to one another against the action of the springs (174) is limited. 31) Vorx'ichtung for inserting, of cores and for ejection of Molds according to claim 22, characterized in that that the ejector is movable to and fro along a horizontal platform (162), and that the device for inclination is a roller (166) on the platform is arranged between the ejection point and the position for inserting the cores. 409881/0351