MXPA06008199A - Frame for molding machine and method of molding using the frame - Google Patents

Abstract

Frames for a molding machine for holding foundry sand therein and preventing the deformation and mismatch of molds. Each of the upper frame (104) and the lower frame (105) comprises a body having at least one supply port (101) specifying an opening for molding the molds and supplying the foundry sand into the opening. A pair of flanges (102) positioned oppositely to each other through the opening and having through holes are extended from the body to the outside. A frame member comprises an engagement member engageable with an actuator so that a force from the actuator on the outside of the frame can be transmitted to the frame. The upper frame (104) and the lower frame (105) positioned oppositely to each other through a pattern base board (107) are integrally connected to each other by fitting a pair of connection levers (106) into these through holes to form a frame unit.

Description

WO 2005/068107 Al 1 lllll llilllll 11 Mul Itlll lili lllll lllll 1 II III IIIII joined mu [lili mti my my IIII order IÍIflíi ©? A2AX / -G-J £ # ü " STRUCTURE FOR MOLDING MACHINE AND MOLDING METHOD USING THE STRUCTURE FIELD OF THE INVENTION This invention relates to a molding box of a molding machine for molding a mold with molding sand, and a method for molding a mold using the invented molding box.

BACKGROUND OF THE INVENTION Molding machines without mold boxes are known as described in such Japanese Prior Application Publication No. 7-16705, filed July 2, 1993, assigned to the present applicant. Molding machines without molding boxes employ a molding process without molding boxes, where a molded mold is removed from a pair of molding boxes (an upper molding box and a lower molding box), and its sides They are covered by molding jackets, if needed, so that this is then poured. In the conventional molding boxes of the molding machine, as shown in the previous application, the upper and lower matching molding boxes are supported in cantilever, such that they are connected to each other only on one of their sides. For this reason, an undesirable separation may occur between the upper molding box and the lower molding box on the side that is opposite the connection side when caused to overlap, while a gap may appear between them on the connection side when a model is induced. This results in that the mold face can not be arranged in parallel with the mating face of the mold box, and thus, this causes a mold change. The change of mold prevents the mold from being extracted vertically from a model and in this way, cause problems such as a mold fall. Although the cope flask and the lower mold box with a mold in this overlap, especially using any aligning device for the mold, indeed, it can be difficult to achieve the accuracy for overlap.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a mold box which prevents a mold from changing and a mold from falling. The present invention also provides a molding process using the molding box. The present invention provides a molding box for containing foundry sand. The molding box comprises: a body defining an opening in which a sand mold is molded, the body has an inlet for introducing said foundry sand into the opening; and a mounting element attached to the body for mounting said molding box into a plurality of connecting arms that are adapted to integrally connect a molding box with another molding box, such that the two molding boxes are opposite to, and spaced apart from each other, while they are supported by the connecting arms. In accordance with the present invention, a pair of molding boxes is formed as a single molding box unit. A molding unit mold box, has a shape that is the same, or may differ from that of the other flask of the flask unit. The flask unit that is comprised of the flasks of the present invention may, if the pattern plate has patterns on both surfaces, be incorporated in a molding machine without molding boxes. Accordingly, the present invention also provides a method for molding a mold with the molding machine without mold boxes, using the molding boxes described above. The method comprises the steps of: defining a pair of molding spaces by inserting each pressure medium at each opening of the pair of molding boxes forming the molding box unit; introduce said foundry sand into the pair of molding spaces through the inlets; and molding two mold halves by pressing said casting sand introduced with the pressure elements. Preferably, the method further comprises a step of moving the molding box unit between a position where the definition step is carried out and a position where the introduction step is carried out. In this case, the pressure stage can be carried out in a path in which the mobile molding box unit moves. The method further comprises a step of moving the pair of mold halves in the mold box to a position where a center is fitted into the mold cast after the pressing step. The molding machine without molding boxes which can use the method of the present invention, preferably includes a rotation structure for moving the molding box unit between a position where the definition step is carried out and a position where the introduction step is carried out, and a pair of actuation means for driving the pair of pressure elements, respectively. In this case, the drive means can be moved with the rotation structure at the same time. Alternatively, the driving means may be in a fixed position. In the latter case, the rigidity of the rotation structure can be minimized. Alternatively, one of the pairs of the driving means moves with the rotating structure at the same time, while the other pair of driving means is in a fixed position. In this case, the rigidity of the rotation structure can be reduced. The definition stage can simultaneously define the pair of molding spaces. This is suitable for a case where the height of the upper molding box is the same as that of the lower molding box. Alternatively, the definition step can define a molding space and another molding space at different times. This is suitable for a case where the height of the upper molding boxes differs from that of the lower molding box. The definition step can be completed before the introduction step, so that the molding speed can be increased.

If only one definition still causes insufficient introduction of the foundry sand, the introduction step may include at least one additional definition step to improve the introduction of the foundry sand. The present invention also provides a method for molding a mold with the molding box molding machine, using the above molding box unit. The method comprises the steps of: defining an upper molding space and a lower molding space by holding the model plate between an upper molding box unit and a lower molding box unit, and inserting said upper and lower pressing elements into each opening, which are opposite to the model plate, of the upper and lower molding boxes, respectively, in the molding machine; position the upper and lower molding boxes, and the model plate in their vertical positions, and move the entrances upward; introduce the smelting sand of the inlets in each molding space; reposition the upper and lower molding boxes, and the model plate to its horizontal positions, while also inserting the upper and lower pressure elements in each opening, to press the foundry sand in each molding space; unloading the model plate of the upper and lower molding boxes to carry said model plate of the molding machine; overlapping said upper mold box with the lower mold box to define a product cavity; transferring said upper mold box unit and the lower mold box unit to shedding means for pouring, and for transferring the upper and lower casting box units discharged, to disassembly means for dismantling them, where they are disassembled; and send in the upper and lower assembly units disassembled to the mold box molding machine. In the embodiments of the invention, the desirable smelting sand is green smelting sand using bentonite as a binder. The aforementioned and remaining parts of the scope and spirit of the present invention will be more apparent from the review of the following descriptions of the preferred embodiments given below, together with the accompanying drawings.

BRIEF DESCRIPTION OF THE FIGURES Figure 1 shows a plan view of a molding box of the present invention. Figure 2 shows a schematic side view of a molding box unit composed of a pair of molding boxes of the present invention, partially in transverse view. Figure 3 shows a view similar to that of Figure 2, wherein an adaptation plate is perforated between an upper molding box and a lower molding box. Figure 4 shows a front view of an example of a molding machine that is applicable for the method of the present invention, partially in cross-sectional view. Figure 5 shows a view taken along the arrows A-A of Figure 1, wherein the adaptation plate is perforated between the upper molding box and the lower molding box of the molding box unit. Figure 6 shows a plan view of the molding machine of Figure 4. Figure 7 is an illustrative sequence of the molding machine of Figure 4 with a step for introducing the foundry sand into the molding box units. . Figure 8 is a flow chart schematically illustrating a method for molding a mold of the present invention in a molding line involving a molding machine without mold boxes. Figure 9 is a flow chart schematically illustrating an alternative method of molding a mold of the present invention in the molding line involving the molding machine without mold boxes. Figure 10 shows a schematic block diagram of a molding line involving a molding box molding machine, which is applicable for the molding method of the present invention. Figure 11 shows a front view of the molding box molding machine of the molding line of Figure 10. Figure 12 shows a front view of a molding box unit used in the molding box molding machine. of Figure 11. Figure 13 shows a left-side front view of the molding box unit of Figure 12. Figure 14 shows a right-side front view of the molding box unit of Figure 12. Figure 15 is an illustrative sequence of the molding machine of Figure 11 with a step for introducing casting sands into the molding box units.

DETAILED DESCRIPTION OF THE INVENTION Figure 1 shows a mold box F of the present invention. In Figure 1, two mold boxes F are caused to overlap. The upper mold box F is provided with coupling elements 2a, while the mold box F is provided with coupling elements 3a. The other arrangements of the upper molding box are the same as those of the lower molding box. Each mold box F includes integral peripheral walls (or a body), which defines an opening. One side of the peripheral walls has at least one inlet 101 for introducing foundry sand into the opening. Flanges (mounting elements) 102 are attached to the external surfaces of a pair of opposite walls of the peripheral walls of the mold box F. A through hole is punched through each flange 102 such that the two perforations are contrary each other through the opening of the molding box. The flanges 102 can be integrally molded into the body of the mold box F. Alternatively, the ridges 102 can be manufactured separately from the body, so that they can be mechanically attached to the body. For example, the mold box F of the present invention can be made from an existing mold box, to act as the body and flanges 102 so as to be attached to the body. In this case, the coupling elements 2a, 3a, of the mold box F, are preferably integrally molded with the flanges 102. The functions of the coupling elements 2a, 3a, will be described later. As shown in Figures 2 and 3, a molding box unit includes an upper molding box 104 and a lower molding box 105. Each molding box has arrangements that are the same as those of the molding box F of the present invention. Because the profile of the upper molding case 104 need not be the same as that of the lower molding case 105, they may differ. Connecting rods 106 are integrally connected to the upper molding box 104 to the lower molding box 105. The connecting rods 106 are slidably inserted into the perforations 103 of the paired upper and lower molding boxes 104 and 105. During the In the current molding process, the upper and lower matched molding boxes 104 and 105 move up and down along the connecting rods 106 to pierce an adapter plate 107 therebetween in preparation for molding. The molding box and thus the molding box unit of the present invention can be used with a molding machine without molding boxes, since the molding boxes are removed after the mold is molded. Alternatively, they can also be used with a molding box molding machine since the molding boxes do not need to be removed even after a mold is molded and thus, the mold boxes containing the mold are transported to the mold line. molding Figures 4, 5 and 6 show an example of a molding machine without mold boxes, for which the molding box unit as shown in Figures 2 and 3, can be used. In the molding machine without molding boxes, a definition station P for defining a molding space, a sand introduction station S, and a mold center / extraction adjustment station, are integrally installed within the internal space of a rectangular base 1. The molding box unit can be transferred to each station, that is, it is not mechanically fixed on the fixed portion in the molding machine. In the definition station P, two pairs of the upper and lower paired molding boxes 2 and 3 are replaced, each molding box having an inlet for introducing the casting sand of its side wall. The definition station P includes a conveyor 4 for transporting in and out an adaptation plate 5 between the upper and lower paired molding boxes 2 and 3 of the two pairs of these, and a pressing machine 9. Each upper molding box 2, each lower molding box 3 and the matching plate 5, are the same as the upper molding box 104, the lower molding box 105 and the matching plate 107, described above, respectively. They are formed as a molding box unit. The pressing machine 9 is provided with an upper and lower pressing plate 6 and a lower pressing plate 7 which are inserted into and removable from the corresponding openings of an upper molding box 2 and its lower molding box paired 3.

These openings are opposite to the adaptation plate which is perforated between the upper and lower matching molding boxes 2 and 3. The pressing machine 9 is rotatably supported by a support shaft 8, which rests on the base 1. The machine pressure 9 is thus reversibly rotatable about the support axis 8 in the normal plane. The pressing machine has a range of change between a position where the upper and lower molding boxes 2, 3 and the perforated matching plate 5 between them, are in their vertical positions, and a position where they are in their positions horizontal The definition station P also includes a horizontal cylinder 10 for reversibly changing the pressing machine 9. The sand introduction station S includes a sand introducer 11 for introducing the foundry sand into the upper and lower matching molding boxes 2 and 3, which are already positioned in their vertical positions by the extended stroke of the cylinder 10 through its inputs. The mold center / extraction adjustment station W includes a mold extractor 12 for extracting an upper mold half and a lower mold half from the upper and lower matching mold boxes 2 and 3, which are already positioned in their molds. horizontal positions and which overlap each other, so that they contain half of the upper mold and half of the lower mold. The mold center / extraction adjustment station W, also includes a shift conveyor 13 for alternately and intermittently rotating two pairs of the upper and lower horizontal mold boxes 2 and 3 (each pair is composed of a horizontal upper mold box 2 and a lower horizontal mold box), one at a time. The shift conveyor 13 has a shift interval between the pressing machine 9 which is in its horizontal position and the mold extractor 12. During this movement, a pair of upper and lower horizontal mold boxes and another pair of molding boxes upper and lower, are arranged in parallel in relation to a vertical line. The mold extractor 12 can also be coupled with each upper mold box 2 to move up and down. In each pair of the upper and lower mold boxes 2 and 3 of the two pairs, as shown in Figure 4, a pair of connecting rods 14 are vertically positioned and slidably inserted in the front side and the rear side of the upper mold box 2. The lower mold box 3 is vertically and slidably supported on and through the connecting rods 3. The lower ends of the connecting rods 14, can be coupled with the mold box 3. Each pair of upper and lower mold boxes 2 and 3, is taken as a molding box unit together with an adaptation plate to be perforated therebetween in a molding process. The coupling elements 2a and 3a, described above, can be supported by the shift conveyor 13. For example, the coupling elements 2a, are attached to the central positions of the opposite sides of the upper mold boxes 2, while the coupling elements 3a are attached to the ends of opposite sides of the molding box 3 when it is in the pressing machine 9. In this embodiment, as shown in the figures, each coupling element 2a and 3a has a shape convex with a hole for receiving a pin (not shown), to be connected to an upper matching coupling element 37 or a lower mating coupling element 39 (described below), of the shift conveyor 13. The shape of each element 2a or 3a, can take any shape that is suitable to be connected or attached to the upper mating coupling element 37 or the lower coupling element. or of mating 39 of the change conveyor 9. For example, it can take a convex shape. Each coupling element 2a and 3a can be attached to the flanges 102 (Figure 1) or can be attached to the body of the mold box. As shown in Figure 4, the conveyor 4 for transporting the adaptation plate includes a ring element 15 which is fixed on the support shaft 8 of the pressing machine 9, and a cylinder 16, which is pivotally attached to the sand introducer 11. The end of a piston rod of the cylinder 16 is pivotally connected to a portion of the ring element 15. The conveyor 4 may also include a pair of cantilevered arms 17, the base ends of which are attached to the element of the piston rod. 15. The extension and contraction courses of the cylinder 16, cause the paired cantilever arms 17 to be rotatably moved up and down, to transport the adaptation plate in and out between the upper horizontal mold box 2 and the box Lower horizontal molding 3 in the pressure machine. In the pressing machine 9, as shown in Figure 4, a rotation structure 18 is rotatably fitted to the approximate central portion of the support shaft 8, which is mounted in the center of the upper surface of the base 1. The rotation structure 18 can thus be reversibly rotated in the vertical plane. The right side of the rotation structure 18 is provided with a pair of elongated, vertical guide arms 19. The guide arms 19 are positioned in a rearward and frontal relationship with each other, to form a predetermined distance therebetween. A vertically upper-reversed L-shaped structure 20 and a vertically moving and L-shaped structure 21 are vertically and slidably mounted on and through the upper portions and the lower portions, respectively, of two rods guides 19, via fasteners, each of which is integrally provided with the corresponding structure 20 or 21. The upper vertically moving structure 20 and the vertically lower moving structure 21, can be moved near and far to each other, by the extension and contraction paths of an upwardly facing cylinder 22 and a downwardly facing cylinder 23, respectively. These cylinders 22, 23 are mounted on the rotating structure. The upper vertically moving structure 20 is provided, with a plurality of cylinders 24 to advance and retract the upper pressure plate 6, while the structure moving vertically lower 21, is provided with a plurality of cylinders 25 for advancing and retracting the lower pressure plate 7. The horizontal surface of each pressure plate 6 or 7, has a cross section that is sufficient to press the corresponding upper and lower mold box 2 or 3. In this embodiment, the cylinders (driving means) for actuating the pressure plate (pressure means), cooperate to move with the rotation structure 18 at the same time. Alternatively, the cylinders can be fixed on the fixed portions. In addition, a group of cylinders of the pressure plate 6 or 7 can cooperatively move with the rotating structure at the same time, and the other group of cylinders of the corresponding pressure plate can be fixed on the fixed portion. The sand introducer 11, which is mounted on the surface of the base 1 (near the left side in the figure), includes two aeration mold boxes 27, for separately introducing the foundry sand into the upper mold box 2. and the upper molding box 3, while the introduction of the foundry sand is floated or fluidized ("introduction and fluidized sand"), by compressed air with a low pressure. The introduction and fluidizing sand for flotation or fluidizing the foundry sand using the compressed air with low pressure, are described in such Patent Application No. 6,749,003 B2, assigned to the applicant of the present application. It was found that the desirable pressures of the low pressure air are in the range from 0.05 MPa to 0.18 MPa. However, a suitable introduction process that can be used for the present invention is not limited to the fluidizing and introduction process.

Alternatively, a process of introducing blowing using compressed air with the upper pressure and with or without lowering the pressure, can be used in the present invention. The mold extractor 12 includes an extraction plate 28, which is insertable into and retractable from the upper and lower 2 and 3 horizontal, overlapping molding boxes. Such extraction plate 28 is attached to the lower end of the piston rod of a downwardly facing cylinder 29 which is mounted on the cover of the base 1. The extraction plate 28 can be moved vertically by the extension and contraction paths. of the cylinder 29. Positioned immediately below the extraction plate 28 is a receiving table 30 for receiving an upper mold half and a lower mold half to be extracted from the upper mold box 2 and the lower mold box 3 , respectively. The receiving table 30 can be moved vertically by a pantograph 32, which can be extended and contracted by the extension and contraction paths of a cylinder 31 (see Figure 5). In the shift conveyor 13, a vertically elongated rotating shaft 33 is mounted horizontally and rotatably in the base 1. The upper end of the rotating shaft 33 is connected to the output of a motor 34, which is mounted on the top of the base 1. The rotary axis 33 can be reversibly changed in a change interval of 180 ° C by driving the motor 34.

The 180 ° change interval is only one example of the change intervals of the rotary axis 33 for transferring the molded mold from the position of a site, wherein the mold is molded to the extractor 12 by the rotation mechanism 13. Due to that this change interval is defined and based on the site where the extractor 12 is installed, is not limited to 180 ° C. The extractor 12 can be installed anywhere based on the desirable change interval of the shaft. The upper portion of the rotating shaft 33 is provided with a support member 35 from which two pairs of guide rods 36 are suspended downwardly. The guide rods 36 are coupled in a rear and front relationship to form a predetermined distance between these, so that they are opposite each other through the rotary axis 33 that is centered between them. An upper coupling element 37 is vertically and slidably fitted in each pair of the guide rods 36 for coupling the coupling elements 2a. The upper coupling element 37 is attached to the distal end of the piston rod of the cylinder 38 which is mounted on the rotary shaft 33. The upper coupling element 37 can thus be vertically moved by the extension and contraction paths of the cylinder 38. The lower ends of the two pairs of the guide rods 36 are joined to an upper coupling element 39 which can be coupled to the coupling elements 3a of the two lower mold boxes 3. One of the functions of a The mold ejector 40 is to push the upper and lower mold halves, which are extracted from the upper and lower molding boxes 2 and 3, of the receiving table 30. The molding method of the present invention will now be described. First, a pair of molding spaces is defined by inserting a pair of pressure elements (the pressure plates 6 and 7 in the embodiment of Figure 4), in the openings of a molding box unit. The foundry sand is then introduced into the molding spaces. The pressure elements are pressed into the foundry sand to mold two halves of molds (see Figure 8). In the molding method of the present invention, the molding box unit can be transferred between a location where the molding spaces are defined and a location where the foundry sand is introduced into the molding spaces. In this case, the foundry sand introduced into the molding spaces can be pressed into the path in which the molding box unit is transferred (see Figure 9). The molding method illustrated as in Figure 9, will be in more detail described below, using the above molding box unit and the molding machine without molding box, from this state as shown in Figure 4, to molding the upper and lower mold halves, each of which does not have a molding box. First, in the definition station P, the adaptation plate 5 is carried between the upper and lower horizontal and upper molding boxes 2, paired, via the paired arms 17 by the extension path of the cylinder 16 of the conveyor 4. The box upper molding 2 and lower molding box 3, are then moved close together via the upper and lower vertical movement structures 20 and 21, by the contraction paths of the upwardly moving cylinder 22 and the cylinder moving downwardly 23, respectively, of the pressure machine. In this state, the upper and lower mold boxes 2 and 3, with the matching plate 5, are formed as a mold box unit which is integrally mounted by the connecting rods 14. The plurality of cylinders 24, 25 of the pressure machine, extend by the predetermined length, while the adaptation plate 5 is maintained between the upper and lower molding boxes 2 and 3 paired. An upper molding space and a lower molding space are then defined by inserting the upper pressure plate 6 and the lower pressure plate 7 into the upper molding box 2 and the lower molding box 3, respectively, by the lengths predetermined, while the cylinder 10 is extended. The pressing machine 9 is rotated about the support axis in a clockwise direction, so that the upper and lower matching molding boxes 2, 3, and the matching plate 5, are positioned in their vertical positions, and the sand entries originate (see Figure 4). If the height of the upper molding box 2 is the same as that of the lower molding box 3, the matched molding spaces can be simultaneously defined. Alternatively, if the height of the upper molding box 2 differs from that of the lower molding box, two molding spaces can be separately defined in different synchronizations. At the sand introduction station S, the sand introducer 11 then introduces the foundry sand into the upper and lower molding spaces paired through the inlets, using any suitable introduction method, such as introducing aeration with compressed air that It has a low pressure (below atmospheric pressure). In the definition station P, the upper and lower matching molding boxes 2, 3 and the matching plate 5 are returned to their horizontal positions. During this movement, the upper pressure plate 6 and the lower pressure plate 7, which are inserted into the upper molding box 2 and the lower molding box 3, are further inserted into the corresponding molding boxes to press the sand of casting within the upper molding space and the lower molding space. The upwardly moving cylinder 22 and the downwardly moving cylinder 23 are extended such that the upper vertically moving structure 20 and the vertically lower moving structure 21 are spaced apart from one another. If only one definition of each molding space causes any insufficient introduction of the foundry sand, at least one additional definition of each molding space can be carried out in the introduction step to improve the introduction of the foundry sand. Of course, the definition of the molding spaces is preferably completed before the introduction step, to accelerate the molding speed.

In the mold centering / removing station, the upper mold box 2, which contains a mold half, which is produced by pressing the casting sand, is left via the upper coupling element 37 to separate from the mold. adaptation plate 5 by extending the cylinder 38 of the shift conveyor 13. The lower mold box 3 is arranged in the lower coupling element 39 of the shift carrier 39. The matching plate 5 is then carried out from between the upper mold box 2 and the lower mold box 3 via the paired arms 17 by contracting the cylinder 16. The motor 34 of the shift conveyor 13 is driven to change the rotary axis 33 in a predetermined interval, such that the upper mold boxes lower paired 2, 3 which contain the mold, are transferred to the molding puller 12. A center is then adjusted in each mold, if necessary. The cylinder 38 is then contracted to decrease the upper molding box 2 containing the mold via the coupling element 37, such that the upper molding box 2 overlaps the lower molding box 3. The cylinder 31 of the mold extractor 12 is then extended to rise on the receiving table 42, so that the lower mold box 2 is disposed on the receiving table 42. The cylinder 41 extends in such a way that the upper and lower matching mold boxes 2, 3, which contain the mold halves, are arranged on the receiving table 42. The cylinder 29 of the extractor 12 is then extended, such that the extraction plate 28 contacts the mold half in the upper molding box 2. The cylinder 31 is then contracted to decrease the plate of extraction 28 and the receiving table 30 in a cooperative relationship to extract the mold halves of the lower and upper molding boxes 2, 3. The cylinder 31 is then contracted to the level at which the mold halves are ejected, from such that the ejector 40 is pushed from the upper and lower mold halves of the receiving table. In the processes described above, it is desirable that a center be fixed in each half of the molded mold, if necessary. In that case, a center is fixed in each half of the mold molded before the upper mold box 2 and the lower mold box 3, each containing the molded mold half, rotated and thus transferred to the extractor 12. Upper and lower molding boxes 2, 3 paired, are then caused to mate with each other to push half of the molds, as described above. Although this embodiment uses two pairs of upper and lower molding boxes 2, 3, only a pair of the upper and lower boxes can be used. If the paired upper and lower boxes are used, the first (upper) and second (lower) press the plates by the upper molding box 2 and the lower molding box 3 are separately moved close to, and away from, the molding boxes corresponding in a trajectory. The trajectory acts as such when the paired molding boxes are transferred from a position where the foundry sand is introduced into the molding space and a position where the molding spaces are completed. The melting sand can thus be compressed to reduce the time needed in the molding processes. In this path, the first pressure plate for the upper mold box 2 and the second pressure plate for the lower mold box 3 are separately extracted from the corresponding mold boxes. Due to this, it is caused that the molding speed is increased, you can obtain enough time to fix the centers. If the adaptation plate 5 or 107 has models on both surfaces, any process suitable for the manufacture of the adaptation plate can be used. For example, a model plate that has a pattern on its corresponding side for the upper molding box and a model plate that has a pattern on its corresponding side for the lower molding box could be assembled or recycled and used on the plate resulting adaptation by combining them in such a way that their posterior sides are opposite each other. Now, the mode for which the molding method of the present invention is applied to a molding box molding machine will be described. As schematically illustrated as in Fig. 10, a molded base line in the molding box molding machine includes the molding box molding machine 51, a pour line 52, a mold stripping device 53 for disassembled molds, and a recycling device 54 for recycled mold boxes. The molding box molding machine 51 molds an upper mold with a mold box and a lower mold with a mold box. The pour line 52 flows to produce cavities in the molded upper and lower molds. Dismantling device 53 pushes the molded molds of the upper and lower mold boxes. The recycling device 54 transfers upper and lower molding box units 46 (see, Figs 11 and 12, but described below) from the disassembling device 53 to the molding machine 51. As shown in Figs. 11 to 14, the molding machine 51 includes a rectangular base having an inert space. In the inert space, a plurality of pairs of the upper and lower mold box units 46 are housed. In each molding box unit, the upper molding cove 2 and the lower molding box 3, each molding box has an entrance to enter the casting sand of its side wall, connect to each other to move close to, and far from each other. The upper molding box 2, the lower molding box 3, and each molding box unit 46 are the same as those of the above embodiments. A pattern plate such as the matching plate 5, which has patterns on both surfaces, is pressed between the upper mold box 2 and the lower mold box 3 of a molding box unit 46 of the plurality of the mold units. upper and lower molding box. The model plate or the adapter plate 5 can be transported in and out of a position between the corresponding molding boxes by a conveyor 4a. Because the model plate, however, is not limited to the matching plate 5, it can be a model plate having a pattern on only one surface on its upper and lower surfaces. A pressure machine 9 which is housed within the inert space of the base 1, includes an upper pressure plate 6 and a lower pressure plate 7. Both are inserted in, and extracted from the corresponding openings in the molding boxes corresponding. These openings are opposite the adaptation plate which is supported between the upper mold box 2 and the lower mold box 3. The same as in the above-mentioned embodiments, the pressing machine 9 includes a support shaft 8 in the base 1. The pressing machine 9 also rotatably supports the upper molding box 2, the lower molding box 3 and the matching plate 5 with each other. They can thus be changed reversibly around the support axis 8 in the normal plane between a position where they can be in their vertical position, and a position where they are in their horizontal positions. The inert space of the base 1, said space is the same as in the previous embodiments, houses a horizontal cylinder 10 (a rotary drying mechanism) to rotate or rotate the pressure machine 9 reversibly, and a sand introducer 11 for introducing the foundry sand into the upper and lower molding boxes 2, 3 paired, which are placed in their vertical positions by the extension path of the cylinder 10 through their inlets. The inert space of the base 1 also houses a shift conveyor 13 for alternating and intermittently rotating two pairs of the upper and lower horizontal mold box units 46, and for vertically engaging and moving the upper mold box 2. adjacent located right side of the shift conveyor 13 is alternative to the extractor 12 as in the above embodiments, i.e., a transfer mechanism 12a, for transferring the upper and lower mold box units 46. The essential arrangements of the shift conveyor 13 are substantially the same as those in the above embodiments. However, the shift conveyor 13 has a range of change between the pressing machine 9 in which the upper and lower paired molding boxes are placed in their horizontal positions and the transfer mechanism 12a. In each pair of the upper and lower mold boxes 2 and 3 of the plurality of pairs of the upper and lower mold box units, as shown in FIG.

Fig. 12, a pair of connecting rods 14 of vertical shape, extend downwardly of the front side and the rear side of the upper mold box 2. The lower mold box 3 is supported vertically and slidable in, and through the connecting rods 14. The lower ends of the connecting rods 14 can be coupled with the lower mold box 3. The coupling elements (not shown in Fig. 12, but are the same as the coupling elements 2a and 3a of Fig. 1, for example, each coupling element has a convex shape with a perforation) adhere to the central positions of the opposite sides of the upper molding box 2, and are joined to the ends of the opposite sides of the lower molding box 3 when they are in the pressing machine 9. As shown in Fig. 11, the transport mechanism 4 for transporting the adaptation plate includes an element of the ring 15, which is fixed on the support shaft 8 of the pressure machine 9, and a cylinder (not shown in Fig. 11, but is substantially the same as the cylinder 16 in the embodiments for the molding machine without molding box) whose piston rod at its end is pivotally connected to a portion of the ring element 15. The transport mechanism also includes a pair of arms in cantilever 17 that are rotated laterally by the extended and contracted stroke of the cylinder, and a suspended rail 45 that is movably lateral with the matching plate 5 being placed therein. In the pressing machine 9, the rotation structure 18 is rotatably attached to the approximate center portion of the support shaft 8 which is mounted in the center of the upper surface of the base 1. The rotation structure 18 can thus, it can be reversibly rotated in the vertical plane. The right side of the rotation structure 18 is supplied with a pair of elongated guide arms 19, vertical. The guide arms 19 are positioned in respective front and rear positions to form a predetermined distance from each other. The upper vertical moving structure in the form of an inverse L shape 20 and the vertical moving structure in the form of an inverse L shape 21, are mounted on, and through, the upper portions and the lower portions, respectively, of the two guide bars 19, via the fasteners, each of which is integrally provided with the corresponding structure 20 or 21. The structures that move vertically upper and lower 20 and 21, can be moved close to, and far from each other by the extension and contraction paths of a cylinder that moves in an ascending manner and a cylinder that moves downwardly (none shown in Fig. 11. However, they are substantially the same as the cylinder 22 moving upwardly and the cylinder 23 moving downwardly in the modalities for the molding machine without mold box) they are mounted on the rotation structure. The vertically moving upper structure 20 is provided with a plurality of cylinders 24 for advancing and retracting the upper pressure plate 6, while the vertical moving structure 21 is provided with a plurality of cylinders 25 for advancing and retracting the lower pressure plate 7. The horizontal surface of each vertically moving structure 20 or 21 has a cross section that is sufficient to press the corresponding upper or lower mold box 2 or 3. Preferably, the sand introducer 11 is a pair of aeration introducers that separately introduce the foundry sand into the upper mold box 2 and the lower mold box 3, while floating or being fluidized ("fluidized introduction") the foundry sand can compress air with a low pressure (preferably, 0.05 Mpa to 0.18 Mpa). The two aeration canals can be independently controlled and operated, operated at the same time, or controlled in the same way. As shown in Figure 11, the shift conveyor 13 has a vertical rotating shaft 33 that is horizontally and rotatably mounted in the base 1. The upper end of the rotary shaft 33 is connected to the output of a motor 34 which is mounted in the cover of the base 1 in such a way that the rotating shaft 33 can be reversibly changed in the change interval of 180 ° C by driving the motor 34. The upper portion of the rotary shaft 33 is provided with a support element 35 from the which two pairs of guide rods 36 are suspended in a downward and forward relationship to form a predetermined distance between them, so that they are opposite each other through the rotary axis 33 which is centered between them. Fixed on each pair of the guide rods 36 is an upper coupling element 37 which can be vertically slid therein for coupling the coupling elements 2a. Each upper coupling element 37 is attached to the corresponding distal end of the rod by the piston by a cylinder (not shown), which is mounted on the rotary shaft 33. The upper coupling element 37 can thus be vertically moved by the extension and contraction of the cylinder. The lower ends of the two pairs of the guide rods 36 are attached to the lower coupling elements 39, so that they can be coupled to the coupling elements of the two lower mold boxes 3. The molding method will now be described, using the above molding box unit and molding box molding machine, of the state as shown in Figure 10, for molding upper and lower mold halves and thus, molding a mold. First, the conveyor 4 is transported on the adapter plate 5 at a position between the upper horizontal mold box 2 and the horizontal lower mold box 3 of the upper and lower mold box units 46 by the rail 45. The box The upper mold 2 and the lower mold box 3 are then moved close together via the upper and lower vertical movement structures 20 and 21 by the contraction paths of the upwardly moving cylinder and the downwardly moving cylinder, respectively , of the pressing machine 9. The plurality of the cylinders 24, 25 of the pressing machine is extended by a predetermined length, while the matching plate 5 is maintained between the upper and lower mold boxes 2 and 3. A space The upper molding and a lower molding space are then defined by inserting the upper pressure plate 6 and the lower pressure plate 7 into the upper molding box 7. and the lower mold box 3, respectively, by the predetermined lengths. The pressure machine 9 is changed around the support axis 8 in the clockwise direction by extension and contraction paths of the cylinder 10, so that the upper and lower molding boxes 2, 3 and the plate adaptation 5, are positioned in their vertical positions. At the same time, the sand inlets are originated in such a way that they contact the lower end of the sand introducer 11 (see Figure 15). The sand introducer 11 then introduces the foundry sand into the lower and upper molding spaces paired through the inlets. The upper and lower molding boxes 2, 3 and the matching plate 5 are then returned to their horizontal positions. During this movement, the upper pressure plate 6 and the lower pressure plate 7 are further inserted into the corresponding molding boxes to press the foundry sand into the upper molding space and the lower molding space. The cylinder that moves up and the cylinder that moves down, they are extended in such a way that the upper vertically moving structure 20 and the vertically lower moving structure 21 are separated from each other. The upper mold box 2, which contains a mold half, which is produced by pressing the casting sand, is left via the upper coupling element 37 to separate it from the adaptation plate 5 by extending the cylinder of the shift conveyor 13. The lower molding box 3 is arranged in the lower coupling element 39 of the shift conveyor 39. The matching plate 5 is then brought between the upper molding box 2 and the lower molding box 3 via the rail 45 by contracting the cylinder 16 (followed by a center being adjusted in each molded mold half, if needed). The cylinder is then contracted to decrease the upper mold box 2 containing the mold half via the coupling element 37, such that the upper mold box 2 overlaps the lower mold box 3. The motor 34 of the conveyor of change 13 is operated to change or rotate the rotary axis 33 in the predetermined change interval, such that the upper and lower molding boxes 2 and 3, each containing the mold half, are transferred to the mechanism of transfer 12a. The receiving device 54 feeds the upper and lower mold box units 46 to the molding machine 51, the pour line 52 and the mold remover 53, instead, by means of the transfer mechanism 12a. Then, the mold box units 46 are recycled through the molding machine. The above embodiments are for illustrative purposes only, but are not intended to be any limitation. Accordingly, several changes could be made in the above embodiments without departing from the scope of the invention defined by the appended claims. Although the present invention may be applicable to either molding machines without molding boxes or a molding box molding machine, its design is not limited to that shown in the accompanying figures. Although the press means of the molding machines are shown as the pressure plates 6 and 7 in the embodiments, they can be replaced with upper and lower pressure columns that can be moved vertically by means of a plurality of drive sources. The hydraulic cylinders are suitable for the drive sources of the pressure medium, if high power is required. If not, the air cylinders can be desirably used. The electric motors can also be preferably used, since they do not need a hydraulic pipe system and thus, the freedom in the selection of the site for the installation of the molding machine can be increased.

Claims (31)

NOVELTY OF THE INVENTION Having described the present is considered as a novelty, and therefore, it is claimed as property contained in the following: CLAIMS

1. A molding box for containing foundry sands, characterized in that it comprises: a body defining an opening in which a sand mold is molded, the body has an inlet for introducing said foundry sand into the opening; and a mounting element attached to the body for mounting said molding box in a plurality of connecting arms that are adapted to integrally connect a molding box with another molding box, such that one molding box and the other box molding are opposite to, and spaced apart from each other, while they are supported by the connecting arms.

A molding box according to claim 1, characterized in that said body or said mounting element has a coupling element for coupling an actuator outside said molding box so that a force or forces of said actuator can be transmitted. to said molding box.

3. A molding box according to claim 1 or 2, characterized in that said mounting element is integrally molded to said body.

4. A molding box according to claim 1 or 2, characterized in that said mounting element is formed to separate said body and is mechanically attached to the body.

5. A molding box according to claim 3 or 4, characterized in that a pair of molding boxes is formed as a molding box unit.

6. A molding box according to claim 5, characterized in that a molding box of said molding box unit has a shape that is the same as that of the other molding box of said molding box unit.

7. A molding box according to claim 5, characterized in that a molding box of said molding box unit has a shape that differs from that of the other molding box of said molding box unit.

8. A molding box according to claim 6, characterized in that the molding box unit has a pair of said connecting arms that are connected to said pair of molding boxes by said mounting elements.

9. A molding box according to claim 8, characterized in that the molding box unit has a model plate that can be gripped between said pair of molding boxes, wherein said model plate has a pattern on at least one surface .

A molding box according to claim 9, characterized in that each molding box includes a pair of mounting elements that are opposed to each other through said opening and are projected externally of each molding box, wherein each element Assembly has an opening to be positioned where one opening of a molding box is aligned with the corresponding opening of the other molding box, when a molding box and another molding box overlap and are aligned with each other.

11. A molding box according to claim 10, characterized in that each connection arm of the molding box unit is slidably fitted in the corresponding openings.

A molding box according to claim 11, characterized in that said model plate is an adaptation plate having patterns on both of its surfaces, and wherein said molding box unit is incorporated in a molding machine without boxes of molding having a pair of pressing elements for pressing said casting sand.

A method for molding a mold with said molding machine without molding boxes using the molding box according to claim 12, characterized in that the method comprises the steps of: defining a pair of molding spaces by inserting each pressure medium at each opening of said pair of molding boxes that are formed from said molding box unit; introducing said foundry sand into said pair of molding spaces through inlets; and molding two halves of molds by pressing said casting sand introduced with the pressure elements.

A method according to claim 13, characterized in that it further comprises a step of moving said molding box unit between a position where said definition step is carried out and a position where said introduction step is carried out. cape.

15. A method according to claim 14, characterized in that the step of pressing is carried out in a path in which said mobile molding box unit moves.

16. A method according to claim 15, characterized in that said pressure that is carried out in the path is carried out before the molding box unit moves.

A method according to any of claims 13 to 16, characterized in that it further comprises a step of moving said pair of mold halves in the molding box unit to a position wherein a center is fitted within each half of the mold box unit. mold after the pressure stage.

18. A method according to any of claims 14 to 16, characterized in that it further comprises a step of moving said pair of mold halves in the molding box unit to a position where said mold is removed.

19. A method according to any of claims 14 to 18, characterized in that said molding machine without mold boxes includes a rotation structure for moving the molding box unit between a position where said definition step is carried out. out and a position wherein said step of introduction is carried out and a pair of driving means for driving said pair of pressing elements, respectively.

20. A method according to claim 19, characterized in that said drive means move with said rotation structure at the same time.

21. A method according to claim 19, characterized in that said drive means are in fixed positions.

22. A method according to claim 19, characterized in that one pair of the driving means is moved with said rotating structure at the same time, while the other driving means is in a fixed position.

23. A method according to any of claims 13 to 22, characterized in that said defining step simultaneously defines said pair of molding spaces.

24. A method according to any of claims 13 to 22, characterized in that said defining step defines a molding space and another molding space at different times.

25. A method according to any of claims 13 to 22, characterized in that said definition step is completed before said step of introduction.

26. A method according to any of claims 13 to 22, characterized in that said step of introduction includes at least one additional definition step.

27. A method according to any of claims 13 to 22, characterized in that said mold halves are poured before said mold halves are removed from the mold box.

28. A molding box according to claim 11, characterized in that said molding box unit is incorporated in a molding box molding machine having a top processing element and a bottom processing element for pressing said molding sand. foundry.

29. A method for molding a mold with the molding box molding machine, using the molding box unit according to claim 28, characterized in that the method comprises the steps of: defining an upper molding space and a space of lower molding holding the model plate between an upper molding box unit and a lower molding box unit, and inserting said upper and lower pressing elements at each opening, which are opposite the model plate, from the boxes of upper and lower molding, respectively, in the molding machine; position the upper and lower molding boxes, and the model plate in their vertical positions, and move the entrances upward; introduce the smelting sand of the inlets in each molding space; reposition the upper and lower molding boxes, and the model plate to its horizontal positions, while also inserting the upper and lower pressure elements in each opening, to press the foundry sand in each molding space; unloading the model plate of the upper and lower molding boxes to carry said model plate of the molding machine; overlapping said upper mold box with the lower mold box to define a product cavity; transferring said upper mold box unit and the lower mold box unit to shedding means for pouring, and to transfer the upper and lower casting box units discharged, to disassembly means for dismantling them, where they are disassembled; and send in the upper and lower assembly units disassembled to the mold box molding machine.

30. A method according to claim 29, characterized in that said molding box molding machine comprises: a first transfer means for carrying said and said model plate between said upper molding box and lower molding box; pressure means having upper and lower pressure elements, to rotatably support reversibly, said upper and lower mold boxes, and said model plate between a position where they are in vertical positions and a position where they are in horizontal positions, in a normal plane; drive means for reversibly rotating said pressure means; insertion means for introducing said casting sand into the upper and lower mold boxes which are brought to their vertical positions by actuatingly rotating said actuation means; and a second transfer means for bringing said upper and lower mold box units in and out of said pressing means, and for lifting and moving said upper mold box.

31. A method as claimed in claim 30, characterized in that said upper and lower pressure elements are insertable into the corresponding openings, which are opposite said model plate, of said upper and lower mold boxes, while said Model plate is perforated between said upper and lower mold box units.