Shell breaking device for lost wax casting

Abstract

The utility model discloses a lost wax casting shell breaking device, which belongs to the technical field of casting demoulding and comprises a table, a workbench is fixedly arranged on the top surface of the table, baffles are symmetrically and fixedly arranged on the top surface of the workbench, sliding grooves are transversely formed in the upper half parts of the opposite side surfaces of the two baffles, and sliding plates are arranged in inner cavities of the two sliding grooves in a sliding manner. A connecting plate is fixedly arranged on the bottom faces of the two sliding plates and located between the two baffles, arc-shaped blocks used for pushing a shell are symmetrically and fixedly arranged on one side face of the connecting plate, the connecting plate and the two arc-shaped blocks are in friction contact with the top face of the workbench, and clamping plates used for fixing the automobile casting are symmetrically arranged between the two baffles. And one side faces of the two baffles are each provided with an empty groove allowing the corresponding clamping plate to penetrate through, and the top face of the workbench and the opposite sides of the two baffles are each provided with an inclined face used for conveying a shell. According to the lost wax casting shell breaking device, the problem that scattered and falling shells are difficult to clean is solved, and the subsequent influence on automobile casting breaking is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of casting demoulding, in particular to a shell-breaking device for investment casting. Background Technique

[0002] Investment casting, also known as precision casting, is a high-precision casting process. Its steps include: wax pattern forming, tree assembly, slurry dipping, shell hardening, wax melting for shell making, melting and pouring, and shell cleaning. In the casting process of auto parts, investment casting is used to make the auto parts present a delicate and translucent effect. At the end of processing, the finished casting needs to be shell-broken to remove the auto casting in the mold shell. However, when shell-breaking the auto casting, the broken shells will scatter and fall onto the surface of the workbench, and the current shell-breaking device lacks a structure for cleaning the crushed shells, resulting in difficulty for personnel to clean the scattered and fallen shells during the shell-breaking process of auto castings, which easily causes the shells to accumulate and thus affects the subsequent shell-breaking of auto castings.

[0003] For example, the existing Chinese patent publication number is: CN214108754U, a shell-breaking machine for investment casting, which: "comprises a frame, a workbench, a fixture, a lifting and sliding assembly, and a shell-breaking assembly. A fixture is fixed on the workbench, and the fixture positions and clamps the casting to be shell-broken. The fixture can adjust the rotation angle. The lifting and sliding assembly includes a vertical slide rail, a slider, a lifting plate, and a lifting cylinder."

[0004] It can be seen that the cited patent literature has the problem of difficult cleaning of the scattered and fallen shells. Content of the Utility Model

[0005] The purpose of the utility model is to provide a shell-breaking device for investment casting to solve the problems raised in the background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A shell-breaking device for investment casting, including a table, a workbench is fixedly arranged on the top surface of the table, baffles are symmetrically and fixedly arranged on the top surface of the workbench, a chute is transversely arranged on the upper half of the opposite side surfaces of the two baffles, sliding plates are slidably arranged in the inner cavities of the two chutes, a connecting plate is fixedly arranged on the bottom surface of the two sliding plates and between the two baffles, arc-shaped blocks for pushing the shells are symmetrically fixedly arranged on one side surface of the connecting plate, the connecting plate and the two arc-shaped blocks are in frictional contact with the top surface of the workbench, clamping plates for fixing the auto casting are symmetrically arranged between the two baffles, empty slots for the clamping plates to pass through are formed on one side surface of the two baffles, inclined surfaces for conveying the shells are arranged on the top surface of the workbench and on the opposite sides of the two baffles, and a driving structure for driving the clamping plates to move is arranged in the inner cavity of the workbench.

[0007] Preferably, the driving structure includes a bidirectional threaded rod and two moving brackets. The two ends of the bidirectional threaded rod are respectively rotatably connected to the inner side walls of the workbench.

[0008] Preferably, the two moving brackets are respectively sleeved on the periphery of the bidirectional threaded rod in a threaded manner, and the ends of the two moving brackets far away from the bidirectional threaded rod are respectively fixedly connected to the two clamping plates.

[0009] Preferably, an electric push rod is fixedly arranged on one side of the top surface of the workbench through a bracket, and the output end of the electric push rod penetrates through the bracket and is fixedly provided with a protective box.

[0010] Preferably, a lifting plate is transversely arranged in the inner cavity of the protective box. A plurality of springs are connected to the bottom surface of the lifting plate, and the free ends of each spring are connected to the inner bottom surface of the protective box.

[0011] Preferably, a plurality of hammer heads for shell breaking are symmetrically fixedly arranged on the bottom surface of the lifting plate, and the bottom end of each hammer head penetrates below the protective box.

[0012] Preferably, a motor is fixedly arranged on one side surface of the protective box, and the output shaft of the motor penetrates through the protective box and is connected with a cam.

[0013] Compared with the prior art, the technical effects and advantages of the present utility model are as follows:

[0014] In this shell breaking device for investment casting, through the arrangement of the connecting plate and the arc-shaped block, the shell falling on the top surface of the workbench can be pushed, and the arrangement of the chute and the sliding plate can assist the connecting plate and the arc-shaped block to move.

[0015] Through the arrangement of the driving structure, the clamping plate can clamp and fix the automobile casting. When the clamping plate moves, it is inevitable that some shells will be pushed by the clamping plate and move into the inner cavity of the empty groove. Then, through the arrangement of the inclined surface, the shells pushed into the inner cavity of the empty groove by the clamping plate will fall onto the inclined surface, and then part of the shell body will be conveyed to the through groove through the inclined surface for centralized collection, reducing the situation that it is difficult to clean the shells falling dispersedly and easily causing accumulation, and reducing the impact on the subsequent shell breaking of the automobile casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a structural schematic diagram of the present utility model;

[0018] Figure 2 Structural schematic diagram of the chute and the empty slot of the present utility model;

[0019] Figure 3 Structural schematic diagram of the connecting plate and the arc-shaped block of the present utility model;

[0020] Figure 4 Cross-sectional view of the workbench of the present utility model;

[0021] Figure 5 Of the present utility model Figure 1 Structural schematic diagram at position A;

[0022] Figure 6 Cross-sectional view of the protective box of the present utility model.

[0023] Explanation of reference numerals:

[0024] In the figure: 1, tabletop; 2, workbench; 3, baffle; 4, chute; 5, sliding plate; 6, connecting plate; 7, arc-shaped block; 8, clamping plate; 9, empty slot; 10, inclined surface; 11, through slot; 12, bidirectional threaded rod; 13, moving frame; 14, limiting rod; 15, electric push rod; 16, protective box; 17, lifting plate; 18, hammer head; 19, spring; 20, cam; 21, motor. Specific embodiments

[0025] In the following description, a large number of specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details. In other examples, some well-known technical features are not described to avoid confusion with the present utility model.

[0026] Unless otherwise defined, the up, down, left, right, front, back, inside and outside directions involved in this article are based on the up, down, left, right, front, back, inside and outside directions in the figures shown by the present utility model, and are hereby explained together.

[0027] The connection method can adopt existing methods such as bonding, welding, bolt connection, etc., depending on actual needs.

[0028] Such as Figures 1 to 6A lost-wax casting shell-breaking device shown in the figure includes a table 1. Support legs are fixedly installed on the bottom surface of the table 1, and a workbench 2 is fixedly installed on the top surface of the table 1. The automotive casting that needs to have its shell broken can be placed on the top surface of the workbench 2, so that the broken shell can fall onto the top surface of the workbench 2. A through groove 11 is formed on the top surface of the table 1 and is located on one side of the workbench 2. A collection box is connected to the bottom surface of the table 1 and is located below the through groove 11. The collection box and the through groove 11 are in through communication. In this way, the shell on the top surface of the workbench 2 can move to one side of the workbench 2 and fall into the through groove 11, so that the shell can pass through the through groove 11 and fall into the collection box for collection.

[0029] Baffles 3 are symmetrically and fixedly installed on the top surface of the workbench 2. A sliding groove 4 is horizontally arranged on the upper half of the opposite side surfaces of the two baffles 3. The inner side walls of the two sliding grooves 4 are both connected with sliding rods. Sliding plates 5 are slidably arranged in the inner cavities of the two sliding grooves 4. The two sliding plates 5 are respectively slidably sleeved on the circumferences of the sliding rods, so that the sliding rods can limit the positions of the sliding plates 5. A connecting plate 6 is fixedly installed on the bottom surface of the two sliding plates 5 and is located between the two baffles 3. Arc-shaped blocks 7 for pushing the shell are symmetrically and fixedly installed on one side surface of the connecting plate 6. The connecting plate 6 and the two arc-shaped blocks 7 are both in frictional contact with the top surface of the workbench 2. After the automotive casting placed on the top surface of the workbench 2 is broken, the broken shell will fall onto the top surface of the workbench 2. At this time, the operator pushes the connecting plate 6, and the connecting plate 6 will drive the arc-shaped blocks 7 to move synchronously, so that the connecting plate 6 and the arc-shaped blocks 7 can push the shell that has fallen onto the top surface of the workbench 2, so that the shell can be pushed to one side of the workbench 2 and fall into the through groove 11, and the shell can pass through the through groove 11 and fall into the collection box for collection. When the connecting plate 6 moves, it will drive the two sliding plates 5 to move in the inner cavities of the sliding grooves 4 synchronously, so that the sliding plates 5, the sliding grooves 4 and the sliding rods on the inner walls of the sliding grooves 4 can limit the position of the connecting plate 6.

[0030] A clamping plate 8 for fixing automotive castings is symmetrically arranged between two baffles 3. An empty groove 9 for the clamping plate 8 to pass through is provided on one side surface of each of the two baffles 3. A driving structure for driving the clamping plate 8 to move is arranged in the inner cavity of the workbench 2. The driving structure includes a bidirectional threaded rod 12 and two moving frames 13. The two ends of the bidirectional threaded rod 12 are respectively rotatably connected to the inner side wall of the workbench 2. A motor is fixedly arranged on one side surface of the workbench 2, and the motor can rotate forward and backward. The output end of the motor penetrates through the workbench 2 and is fixedly connected to one end of the bidirectional threaded rod 12. The two moving frames 13 are respectively threadedly sleeved on the periphery of the bidirectional threaded rod 12. The ends of the two moving frames 13 far from the bidirectional threaded rod 12 respectively penetrate to both sides of the workbench 2 and are located above the workbench 2, and the two moving frames 13 respectively pass through the two empty grooves 9. The ends of the two moving frames 13 far from the bidirectional threaded rod 12 are respectively fixedly connected to the two clamping plates 8. After placing the automotive casting on the top surface of the workbench 2, the operator turns on the motor, and the motor drives the bidirectional threaded rod 12 to rotate, so that the bidirectional threaded rod 12 can drive the two moving frames 13 to move in opposite or relative directions, so that the two moving frames 13 can pass through the empty grooves 9 and respectively drive the two clamping plates 8 to move in opposite or relative directions above the workbench 2, so that the two clamping plates 8 can clamp and fix the automotive casting. The size of the clamping plate 8 is the same as that of the empty groove 9, so that after the clamping plate 8 moves into the inner cavity of the empty groove 9, the connecting plate 6 is moved, avoiding the clamping plate 8 affecting the movement of the connecting plate 6. A limiting rod 14 is fixedly arranged on the inner side wall of the workbench 2 and below the bidirectional threaded rod 12, and the two moving frames 13 are both slidably sleeved on the periphery of the limiting rod 14, so as to limit the movement of the two moving frames 13.

[0031] On the top surface of the workbench 2 and on the opposite sides of the two baffles 3, inclined surfaces 10 for conveying the shells are provided. After the automotive casting is gradually broken, the motor drives the bidirectional threaded rod 12 to rotate in the reverse direction, so that the two moving frames 13 can drive the two clamping plates 8 to move in opposite directions, canceling the clamping of the automotive casting. Some of the dropped shells will fall to one side of the clamping plate 8. When the moving frame 13 drives the clamping plate 8 to move, the clamping plate 8 will push the shell to move, so that the shell can move into the inner cavity of the empty groove 9. When the clamping plate 8 moves into the inner cavity of the empty groove 9, the shell will be squeezed to one side of the empty groove 9 and fall onto the inclined surface 10, so that the shell can fall along the inclined surface 10 into the through groove 11 and then into the collection box. The inclined surface 10, the connecting plate 6 and the arc-shaped block 7 cooperate to clean the shells falling on the surface of the workbench 2, so that the operator only needs to push the connecting plate 6 to clean the scattered shells, which is convenient for operation, reduces the situation that it is difficult to clean the scattered shells and easy to cause accumulation, and reduces the impact on the subsequent shell breaking of the automotive casting.

[0032] On one side of the top surface of the workbench 2, an electric push rod 15 is fixedly installed through a bracket. The electric push rod 15 is arranged directly above the workbench 2. The output end of the electric push rod 15 penetrates through the bracket and is fixedly installed with a protective box 16. A lifting plate 17 is horizontally arranged in the inner cavity of the protective box 16. The bottom surface of the lifting plate 17 is connected with a plurality of springs 19. The free end of each spring 19 is connected to the inner bottom surface of the protective box 16. A plurality of hammers 18 for shell breaking are symmetrically and fixedly installed on the bottom surface of the lifting plate 17. The bottom end of each hammer 18 penetrates below the protective box 16. A transverse groove for the hammer 18 to pass through is opened on the top surface of the protective box 16. A motor 21 is fixedly installed on one side surface of the protective box 16. The output shaft of the motor 21 penetrates through the protective box 16 and is connected with a cam 20. When it is necessary to gradually break the car, the electric push rod 15 is turned on, and the protective box 16 can drive a plurality of hammers 18 to move above the car casting. At this time, the motor 21 is turned on to drive the cam 20 to rotate. Since the output shaft of the motor 21 is connected to the eccentric position of the cam 20, after the cam 20 rotates one week, the lifting plate 17 will be pushed downward once, so that the lifting plate 17 can squeeze a plurality of springs 19, thereby driving a plurality of hammers 18 to move downward. When the springs 19 are squeezed, they will drive the lifting plate 17 to return to its position through their own resilience, thereby driving the lifting plate 17 and a plurality of hammers 18 to move upward. By repeating the operation, the longitudinal reciprocating motion of the hammers 18 can be driven, and the hammers 18 can continuously strike the car casting to break it.

[0033] Vertically and symmetrically fixed vertical rods are installed on the inner bottom surface of the protective box 16. The top ends of the vertical rods penetrate through the protective box 16 and extend above the bracket. The lifting plate 17 is also slidably sleeved on the periphery of the vertical rods, so that the vertical rods can limit the longitudinal reciprocating motion of the lifting plate 17 and also limit the position of the protective box 16, reducing the influence of the vibration during the operation of the motor 21 on the protective box 16.

[0034] Working principle:

[0035] For the lost-wax casting shell-breaking device, the automotive casting to be shell-broken is placed on the top surface of the workbench 2, and the driving structure drives two clamping plates 8 to move in opposite directions to clamp and fix the automotive casting, and then subsequent shell-breaking can be carried out. After the shell-breaking of the automotive casting is completed, the broken shells will be scattered and fall onto the top surface of the workbench 2, and the driving structure drives two clamping plates 8 to move in opposite directions, and then the automotive casting can be taken out. When the shells are scattered and fall, some of the shells will fall to one side of the clamping plate 8. When the two clamping plates 8 move in opposite directions, the two clamping plates 8 will respectively push some of the shells on one side of the clamping plate 8, so that the shells can move into the inner cavity of the empty slot 9. After the clamping plate 8 moves into the inner cavity of the empty slot 9, the shells will be squeezed onto the inclined surface 10 and fall along the inclined surface 10 into the through slot 11 for centralized collection. After the clamping plate 8 enters the inner cavity of the empty slot 9, the operator pushes the connecting plate 6, so that the connecting plate 6 drives two sliding plates 5 to move in the inner cavity of the sliding slot 4, and then the connecting plate 6 can move between the two baffles 3, and then the connecting plate 6 and the arc-shaped block 7 push the shells on the top surface of the workbench 2, and the pushed shells will fall into the through slot 11 for centralized collection. This enables the operator to simply push the connecting plate 6 to clean the scattered and fallen shells, which is convenient for operation, reduces the situation where it is difficult to clean the scattered and fallen shells and easily causes accumulation, and reduces the impact on the subsequent shell-breaking of automotive castings.

[0036] It should be noted that in this article, relational terms such as "one" and "two" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lost wax casting shell-breaking device, comprising a table (1), characterized in that: On the top surface of the table (1), a workbench (2) is fixedly arranged. On the top surface of the workbench (2), baffles (3) are symmetrically and fixedly arranged. On the upper half of the opposite side surfaces of the two baffles (3), chutes (4) are horizontally arranged. In the inner cavities of the two chutes (4), sliding plates (5) are slidably arranged. On the bottom surfaces of the two sliding plates (5) and between the two baffles (3), a connecting plate (6) is fixedly arranged. On one side surface of the connecting plate (6), arc-shaped blocks (7) for pushing the shell are symmetrically and fixedly arranged. The connecting plate (6) and the two arc-shaped blocks (7) are both in frictional contact with the top surface of the workbench (2). Between the two baffles (3), clamping plates (8) for fixing the automotive casting are symmetrically arranged. On one side surface of each of the two baffles (3), an empty slot (9) for the clamping plate (8) to pass through is formed. On the top surface of the workbench (2) and on the opposite sides of the two baffles (3), inclined surfaces (10) for conveying the shell are arranged. In the inner cavity of the workbench (2), a driving structure for driving the clamping plate (8) to move is arranged.

2. The investment casting shell-breaking device according to claim 1, characterized in that: The driving structure includes a bidirectional threaded rod (12) and two moving frames (13). The two ends of the bidirectional threaded rod (12) are respectively rotatably connected to the inner side walls of the workbench (2).

3. The shell-breaking device for investment casting according to claim 2, characterized in that: The two moving frames (13) are respectively threadedly sleeved on the periphery of the bidirectional threaded rod (12). The ends of the two moving frames (13) far from the bidirectional threaded rod (12) are respectively fixedly connected to the two clamping plates (8).

4. A lost wax casting shell-breaking device according to claim 1, characterized in that: On one side of the top surface of the workbench (2), an electric push rod (15) is fixedly arranged through a bracket. The output end of the electric push rod (15) penetrates through the bracket and is fixedly provided with a protective box (16).

5. The shell-breaking device for investment casting according to claim 4, wherein: In the inner cavity of the protective box (16), a lifting plate (17) is horizontally arranged. The bottom surface of the lifting plate (17) is connected with a plurality of springs (19). The free end of each spring (19) is connected to the inner bottom surface of the protective box (16).

6. The shell-breaking device for investment casting according to claim 5, wherein: On the bottom surface of the lifting plate (17), a plurality of hammer heads (18) for breaking the shell are symmetrically and fixedly arranged. The bottom end of each hammer head (18) penetrates to the lower part of the protective box (16).

7. A lost-wax casting shell-breaking device according to claim 4, characterized in that: On one side surface of the protective box (16), a motor (21) is fixedly arranged. The output shaft of the motor (21) penetrates through the protective box (16) and is connected with a cam (20).

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