A molding device for sand extrusion molding

Abstract

The application discloses a molding device adopting sand extrusion forming, relates to the technical field of foundry mold manufacturing, and specifically comprises an operation table, the operation table is a horizontally arranged rectangular straight plate, a sand dropping mechanism is arranged above the operation table, first linear motors are symmetrically arranged on the both sides of the bottom of the operation table along the length direction of the operation table, a rectangular groove is arranged on the middle of the operation table, U-shaped plates are arranged at the both ends of the lower portion of the rectangular groove, and the both ends of the top of the U-shaped plates are connected with the sliding blocks on the first linear motors on the both sides correspondingly. When the application is used, the installation plate is lifted on the rectangular groove, the sand box and the pushing mechanism are independently operated, the installation plate can be freely moved out of the sand box, the sand box can be mechanically docked and demolded, the precision of the docking is ensured through the linear operation of the multiple drives, and the whole molding process can be remotely operated by the workers, so that the labor intensity of the workers is reduced.

Description

Technical Field

[0001] This invention relates to the field of mold manufacturing technology for casting, specifically to a mold-making device using sand extrusion molding. Background Technology

[0002] In metal casting production, mold-making equipment is frequently used to manufacture the molds required for production. For steel, iron and most non-ferrous alloy castings, sand casting is often carried out by sand extrusion molding. Sand extrusion molding molds are made of inexpensive and readily available materials and can adapt to single-piece production, finished product production and mass production of castings. It has always been the preferred process in casting production.

[0003] Existing sand extrusion molding die-making devices, especially for manufacturing larger molds, often employ a split-half production process followed by assembly to form a complete mold. However, this often leads to alignment discrepancies during assembly, affecting mold quality. Furthermore, demolding and assembly still rely heavily on manual operation, resulting in excessive labor intensity for workers, low automation, and a lack of production convenience. Therefore, we propose a sand extrusion molding die-making device to address these issues. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this invention proposes a molding device that uses sand extrusion molding.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a molding device using sand extrusion molding, comprising an operating table, which is a horizontally arranged rectangular straight plate. A sand-dropping mechanism is provided above the operating table. First linear motors are symmetrically arranged on both sides of the bottom of the operating table along its length. A rectangular groove is provided in the middle of the operating table. U-shaped plates are provided at both ends of the lower part of the rectangular groove. The top ends of the U-shaped plates are connected to sliders on the first linear motors on both sides. A strip plate is provided above the U-shaped plates, parallel to the operating table. A first hydraulic cylinder is vertically mounted at the bottom of the strip plate, and an mounting plate is vertically mounted at the top of the strip plate. The two mounting plates are arranged parallel to each other, and a mold plate is mounted on the side of the two mounting plates that is relatively far apart. A second linear motor is symmetrically installed on both sides of the top of the platform along the length of the platform. A crossbeam is installed parallel to both ends of the platform. The two ends of the crossbeam are connected to the sliders on the second linear motors on both sides. A sand box is installed on the top of the crossbeam. The two sand boxes are open on opposite sides and correspond to the mounting plates. A pushing mechanism is installed inside the sand box. A first cylindrical block is vertically installed on the side of one mounting plate close to the other mounting plate. A second cylindrical block is coaxially installed on the other side of the first cylindrical block. A cylinder is vertically installed on the side of the other mounting plate close to the second cylindrical block. The cylinder corresponds to the second cylindrical block coaxially, and the diameter of the second cylindrical block corresponds to the inner diameter of the cylinder. The sum of the lengths of the cylinder and the first cylindrical block corresponds to the distance between the two first linear motors on the same side.

[0006] Preferably, each of the first hydraulic cylinders is provided with a first guide rod symmetrically on both sides. The top of the first guide rod passes through the U-shaped plate through a linear bearing and is fixedly connected to the strip plate. A limit plate is installed at the bottom of the first guide rod.

[0007] Preferably, each of the mounting plates has a bolt hole vertically located at the corner furthest from the bolt hole. The mold plate is fixed to the mounting plate by bolts corresponding to the bolt holes. A sleeve is located at the corner furthest from the bolt hole on the mounting plate. The sleeve is coaxial with the bolt hole, and the inner diameter of the sleeve is larger than the inner diameter of the bolt hole. The sum of the lengths of the sleeves on the two mounting plates corresponds to the distance between the two first linear motors on the same side.

[0008] Preferably, each of the sand boxes is provided with an inlet and outlet at the top, and an opening and closing door is hinged to one side of the inlet and outlet. The other side of the opening and closing door is connected to the sand box by a latch. A filling block is installed on the side of the opening and closing door near the inside of the sand box, and the edge of the filling block corresponds to the inner wall of the sand box.

[0009] Preferably, each sand box has a strip groove on the side away from the rectangular groove, and the length direction of the strip groove is parallel to the operating table. Each pushing mechanism includes a push plate, the edge of which is tightly attached to the inner wall of the sand box by a sealing ring. A second hydraulic cylinder is vertically installed on the side of the push plate near the strip groove. The second hydraulic cylinder passes through the strip groove and extends to the outside of the sand box. The second hydraulic cylinder is fixed to the edge of the operating table by a fixing plate. Each of the second hydraulic cylinders has a symmetrical second guide rod on both sides. One end of the second guide rod passes through the fixed plate via a linear bearing and is fixedly connected to the push plate, while the other end is coaxially mounted with a limit plate.

[0010] Preferably, the sand-falling mechanism includes a third hydraulic cylinder, which is perpendicular to the operating platform and connected to the operating platform via an L-shaped plate. A sand bucket is installed at the bottom of the third hydraulic cylinder, with sand inlets on both sides of the top of the sand bucket and sand outlet pipes at both ends of the bottom of the sand bucket. The sand outlet pipes correspond to the sand box, and a valve is installed on each sand outlet pipe.

[0011] Preferably, a U-shaped bracket is provided below the operating table, the U-shaped bracket is arranged on both sides of the operating table, and the top two ends of the U-shaped bracket are fixedly connected to the two ends of the operating table. The two U-shaped brackets are connected by multiple connecting plates that are equidistantly arranged along the length of the operating table.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the molding device using sand extrusion molding, through the lifting and lowering of the mounting plate on the rectangular groove, combined with the independent operation of the sand box and the pushing mechanism, allows the mounting plate to be freely moved out of the sand box, and enables the sand box to complete mechanical docking and demolding operations. The multi-drive linear operation ensures the accuracy of docking. At the same time, the entire molding process can be operated remotely by humans, reducing the labor intensity of manual labor. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the top structure of the operating table of a molding device using sand extrusion molding according to the present invention; Figure 2 This is a schematic diagram of the bottom structure of the operating table of a molding device using sand extrusion molding according to the present invention; Figure 3 This is a schematic diagram of section A of a molding device using sand extrusion molding according to the present invention; Figure 4 This is a schematic diagram of section B of a molding device for sand extrusion molding according to the present invention.

[0014] In the diagram: 1. Operating platform; 2. Rectangular groove; 3. First linear motor; 4. U-shaped plate; 5. Mounting plate; 6. Strip plate; 7. First hydraulic cylinder; 8. Second linear motor; 9. Crossbeam; 10. Sand box; 11. Opening and closing door; 12. Filling block; 13. Strip groove; 14. Push plate; 15. Second hydraulic cylinder; 16. Third hydraulic cylinder; 17. L-shaped plate; 18. Sand bucket; 19. Sand inlet; 20. Sand outlet pipe; 21. Valve; 22. First guide rod; 23. Sleeve; 24. Bolt hole; 25. First cylindrical block; 26. Second cylindrical block; 27. Cylinder; 28. Second guide rod; 29. ​​Sealing ring; 30. Fixing plate; 31. U-shaped bracket; 32. Connecting plate. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figures 1 to 4 This invention provides a technical solution: a molding device using sand extrusion molding, comprising an operating table 1, which is a horizontally arranged rectangular straight plate. A sand-dropping mechanism is provided above the operating table 1. First linear motors 3 are symmetrically arranged on both sides of the bottom of the operating table 1 along its length. A rectangular groove 2 is provided in the middle of the operating table 1. U-shaped plates 4 are provided at both ends of the lower part of the rectangular groove 2. The top ends of the U-shaped plates 4 are correspondingly connected to the sliders on the first linear motors 3 on both sides. A strip plate 6 is provided above the U-shaped plates 4, parallel to the operating table 1. A first hydraulic cylinder 7 is vertically installed at the bottom of the strip plate 6, and an mounting plate 5 is vertically installed at the top of the strip plate 6. The two mounting plates 5 are arranged in parallel. A mold plate is installed on the side of the two mounting plates 5 that are relatively far apart. When in use, the two mounting plates 5 can be brought close together and raised up so that they are level with the sand boxes 10 at both ends above, so that the sand boxes 10 can be merged with the mold plate on the mounting plate 5, so that the sand in the sand bucket 18 can fall into it. After extrusion, the mounting plate 5 moves to both sides through the synchronous operation of the first linear motor 3 and the second linear motor 8 to separate the two sand boxes 10 until the two mounting plates 5 are separated. During this process, the pushing mechanism operates synchronously with the second linear motor 8, and does not cause any scratching to the sand mold in the sand box 10 when it is taken out. Then the mounting plate 5 moves in the opposite direction and protrudes out of the sand box 10. Then the first hydraulic cylinder 7 lowers the mounting plate 5 through the rectangular groove 2 and falls into the bottom of the operating table 1, waiting for the two sand boxes 10 to dock and merge. The top two sides of the operating platform 1 are symmetrically equipped with second linear motors 8 along the length of the operating platform 1. The upper two ends of the operating platform 1 are equipped with parallel crossbeams 9, and the two ends of the crossbeams 9 are connected to the sliders on the second linear motors 8 on both sides. A sand box 10 is installed on the top of the crossbeams 9. The opposite side of the two sand boxes 10 is open, and the sand box 10 corresponds to the mounting plate 5. The inside of the sand box 10 is equipped with a pushing mechanism. After the mounting plate 5 moves back to below the operating platform 1, the second linear motor 8 pushes the two sand boxes 10 closer together to dock and merge. During this process, the pushing mechanism operates synchronously with the second linear motor 8. After the two sand boxes 10 merge, the pushing mechanism stops, and the second linear motor 8 operates in the opposite direction to remove the sand box 10 from the formed sand mold to complete the demolding operation, thereby retaining the completed and precisely docked sand mold. Then, the pushing mechanism retracts into the sand box 10 on both sides as the final material is taken out.

[0017] Furthermore, each of the first hydraulic cylinders 7 is symmetrically provided with a first guide rod 22 on both sides. The top of the first guide rod 22 passes through the U-shaped plate 4 through a linear bearing and is fixedly connected to the strip plate 6. A limit plate is installed at the bottom of the first guide rod 22 to guide the operation of the first hydraulic cylinder 7, thereby ensuring the stability of the lifting and lowering of the mounting plate 5 in the rectangular groove 2.

[0018] Furthermore, each mounting plate 5 has a bolt hole 24 vertically provided at the relatively far side corner. The mold plate is fixed to the mounting plate 5 by bolts corresponding to the bolt holes 24. A sleeve 23 is provided at the side corner of the mounting plate 5 away from the bolt holes 24. The sleeve 23 is coaxial with the bolt holes 24, and the inner diameter of the sleeve 23 is larger than the inner diameter of the bolt holes 24. The sum of the lengths of the sleeves 23 on the two mounting plates 5 corresponds to the distance between the two first linear motors 3 on the same side. By tightening the bolts, the mold plate is installed on the mounting plate 5, which facilitates the installation and removal of the mold plate on the mounting plate 5 for the replacement of different mold plates. At the same time, the sleeves 23 cover the bolts. After the sleeves 23 on the two mounting plates 5 come into contact, they provide a certain support for the two mounting plates 5. When pushed and squeezed by the push plate 14, it can protect the support of the mounting plate 5 on the strip plate 6 to prevent the mounting plate 5 from breaking on the strip plate 6.

[0019] Furthermore, a first cylindrical block 25 is vertically mounted on one side of the mounting plate 5 near the other mounting plate 5, and a second cylindrical block 26 is coaxially mounted on the other side of the first cylindrical block 25. A cylinder 27 is vertically mounted on the other mounting plate 5 near the second cylindrical block 26. The cylinder 27 and the second cylindrical block 26 are coaxially corresponding, and the diameter of the second cylindrical block 26 corresponds to the inner diameter of the cylinder 27. The sum of the lengths of the cylinder 27 and the first cylindrical block 25 corresponds to the distance between the two first linear motors 3 on the same side. When the two mounting plates 5 are close together, the second cylindrical block 26 extends into the cylinder 27, and the first cylindrical block 25 contacts the end face of the cylinder 27, thereby providing support for the mounting plates 5 on both sides and further strengthening the support strength of the mounting plates 5 when pushed and squeezed by the push plate 14.

[0020] Furthermore, each of the sand boxes 10 is provided with an inlet and outlet at the top. One side of the inlet and outlet is hinged with an opening and closing door 11, and the other side of the opening and closing door 11 is connected to the sand box 10 by a latch. A filling block 12 is installed on the side of the opening and closing door 11 near the inside of the sand box 10. The edge of the filling block 12 corresponds to the inner wall of the sand box 10 so that the top of the sand box 10 can be opened to facilitate sand falling into the sand box 10.

[0021] Furthermore, each of the sand boxes 10 is provided with a strip groove 13 on the side away from the rectangular groove 2. The length direction of the strip groove 13 is parallel to the operating table 1. Each of the pushing mechanisms includes a push plate 14. The edge of the push plate 14 is tightly attached to the inner wall of the sand box 10 by a sealing ring 29. A second hydraulic cylinder 15 is vertically installed on the side of the push plate 14 near the strip groove 13. The second hydraulic cylinder 15 passes through the strip groove 13 and extends to the outside of the sand box 10. The second hydraulic cylinder 15 is fixed to the edge of the operating table 1 by a fixing plate 30. When the two sand boxes 10 are pressed against the mounting plate 5, the push plate 14 is pushed by the second hydraulic cylinder 15 to move horizontally in the sand box 10, thereby extruding and molding the sand in the sand box 10 to form the required mold. Each of the second hydraulic cylinders 15 has a symmetrical second guide rod 28 on both sides. One end of the second guide rod 28 passes through the fixed plate 30 through a linear bearing and is fixedly connected to the push plate 14, while the other end is coaxially mounted with a limit plate to ensure the stable movement of the push plate 14 in the sand box 10.

[0022] Furthermore, the sand-dropping mechanism includes a third hydraulic cylinder 16, which is perpendicular to the operating platform 1 and connected to the operating platform 1 via an L-shaped plate 17. A sand bucket 18 is installed at the bottom of the third hydraulic cylinder 16. Sand inlets 19 are provided on both sides of the top of the sand bucket 18, and sand outlet pipes 20 are provided at both ends of the bottom of the sand bucket 18. The sand outlet pipes 20 correspond to the sand box 10, and a valve 21 is installed on each sand outlet pipe 20. By driving the sand bucket 18 to rise and fall above the sand box 10 through the third hydraulic cylinder 16, the sand bucket 18 can be brought close to the sand box 10 for sand-dropping operations, so as to prevent sand from splashing when falling into the sand box 10 and falling into the second linear motor 8 and other places, which would affect the operation of the machinery.

[0023] Furthermore, a U-shaped bracket 31 is provided below the operating table 1. The U-shaped bracket 31 is set on both sides of the operating table 1, and the top two ends of the U-shaped bracket 31 are fixedly connected to the two ends of the operating table 1. The two U-shaped brackets 31 are connected by multiple connecting plates 32 arranged at equal intervals along the length of the operating table 1, so as to provide complete planar support for the bottom of the operating table 1 and improve the support effect of the entire device on the ground.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A molding device using sand extrusion molding, comprising an operating table (1), wherein the operating table (1) is a horizontally arranged rectangular straight plate, characterized in that: A sand-falling mechanism is provided above the operating table (1). A first linear motor (3) is symmetrically provided on both sides of the bottom of the operating table (1) along the length direction of the operating table (1). A rectangular groove (2) is provided in the middle of the operating table (1). A U-shaped plate (4) is provided at both ends of the rectangular groove (2). The top of both ends of the U-shaped plate (4) is connected to the slider on the first linear motor (3) on both sides. A strip plate (6) is provided above the U-shaped plate (4). The strip plate (6) is parallel to the operating table (1). A first hydraulic cylinder (7) is vertically installed at the bottom of the strip plate (6). An installation plate (5) is vertically installed at the top of the strip plate (6). The two installation plates (5) are arranged in parallel. A mold plate is installed on the side of the two installation plates (5) that are relatively far apart. The top two sides of the operating table (1) are symmetrically provided with second linear motors (8) along the length direction of the operating table (1). The two ends of the operating table (1) are provided with parallel crossbeams (9). The two ends of the crossbeams (9) are connected to the sliders on the second linear motors (8) on both sides. A sand box (10) is installed on the top of the crossbeam (9). The two sand boxes (10) are open on the opposite side. The sand box (10) corresponds to the mounting plate (5). The inside of the sand box (10) is provided with a pushing mechanism. One mounting plate (5) has a first cylindrical block (25) vertically mounted on one side near the other mounting plate (5), and a second cylindrical block (26) is coaxially mounted on the other side of the first cylindrical block (25). Another mounting plate (5) has a cylinder (27) vertically mounted on one side near the second cylindrical block (26). The cylinder (27) and the second cylindrical block (26) are coaxially corresponding, and the diameter of the second cylindrical block (26) corresponds to the inner diameter of the cylinder (27). The sum of the lengths of the cylinder (27) and the first cylindrical block (25) corresponds to the distance between the two first linear motors (3) on the same side.

2. The molding device for sand extrusion molding according to claim 1, characterized in that: Each of the first hydraulic cylinders (7) is provided with a first guide rod (22) symmetrically on both sides. The top of the first guide rod (22) passes through the U-shaped plate (4) through a linear bearing and is fixedly connected to the strip plate (6). A limit plate is installed at the bottom of the first guide rod (22).

3. The molding device for sand extrusion molding according to claim 1, characterized in that: Each mounting plate (5) has a bolt hole (24) vertically provided at the corner of its relatively far side. The mold plate is fixed to the mounting plate (5) by bolts corresponding to the bolt holes (24). A sleeve (23) is provided at the corner of the mounting plate (5) away from the bolt holes (24). The sleeve (23) is coaxial with the bolt holes (24), and the inner diameter of the sleeve (23) is larger than the inner diameter of the bolt holes (24). The sum of the lengths of the sleeves (23) on the two mounting plates (5) corresponds to the distance between the two first linear motors (3) on the same side.

4. The molding device for sand extrusion molding according to claim 1, characterized in that: Each of the sand boxes (10) has an inlet and outlet at the top. One side of the inlet and outlet is hinged with an opening and closing door (11). The other side of the opening and closing door (11) is connected to the sand box (10) by a latch. A filling block (12) is installed on the side of the opening and closing door (11) near the inside of the sand box (10). The edge of the filling block (12) corresponds to the inner wall of the sand box (10).

5. A molding device for sand extrusion molding according to claim 1, characterized in that: Each of the sand boxes (10) is provided with a strip groove (13) on the side away from the rectangular groove (2). The length direction of the strip groove (13) is parallel to the operating table (1). Each of the pushing mechanisms includes a push plate (14). The edge of the push plate (14) is tightly attached to the inner wall of the sand box (10) by a sealing ring (29). A second hydraulic cylinder (15) is vertically installed on the side of the push plate (14) near the strip groove (13). The second hydraulic cylinder (15) passes through the strip groove (13) and extends to the outside of the sand box (10). The second hydraulic cylinder (15) is fixed to the edge of the operating table (1) by a fixing plate (30). Each of the second hydraulic cylinders (15) is provided with a second guide rod (28) on both sides. One end of the second guide rod (28) passes through the fixed plate (30) through a linear bearing and is fixedly connected to the push plate (14), and the other end is coaxially mounted with a limit plate.

6. The molding device for sand extrusion molding according to claim 1, characterized in that: The sand removal mechanism includes a third hydraulic cylinder (16), which is perpendicular to the operating table (1) and connected to the operating table (1) via an L-shaped plate (17). A sand bucket (18) is installed at the bottom of the third hydraulic cylinder (16). Sand inlets (19) are provided on both sides of the top of the sand bucket (18). Sand outlet pipes (20) are provided at both ends of the bottom of the sand bucket (18). The sand outlet pipes (20) correspond to the sand box (10). A valve (21) is installed on each sand outlet pipe (20).

7. A molding device for sand extrusion molding according to claim 1, characterized in that: The operating table (1) is provided with a U-shaped bracket (31) below it. The U-shaped bracket (31) is set on both sides of the operating table (1), and the top two ends of the U-shaped bracket (31) are fixedly connected to the two ends of the operating table (1). The two U-shaped brackets (31) are connected by multiple connecting plates (32) arranged at equal intervals along the length of the operating table (1).

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