Blanking and punching die for damper limiting cover plate material plate

By designing a segmented blanking channel and a blanking punching die with removable fixed die core, the problem of blanking channel blockage in the processing of shock absorber limit cover sheet sheet is solved, and processing efficiency and cleaning convenience are improved.

CN222842967UActive Publication Date: 2025-05-09WUXI BUNCH AUTO PARTS CO LTD
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Patent Information

Application Number
CN202421841434.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-31
Publication Date
2025-05-09
Estimated Expiration
2034-07-31

AI Technical Summary

Technical Problem

When processing shock absorber limit cover sheet material plates, the prior art is difficult to effectively avoid blockage of blanking channels, resulting in low processing efficiency and difficulty in cleaning.

Method used

A shock absorber limit cover sheet material plate blanking punching die is designed. By dividing the punching blanking channel in the fixed die core into three sections, combining the detachable fixed die core and moving module structure, it ensures that the waste can pass smoothly and reduces the phenomenon of clamping.

Benefits of technology

It effectively avoids blockage of the blanking channel, improves processing efficiency, and makes the cleaning process easier without dismantling the entire lower mold.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a blanking and punching die for a damper limiting cover plate material plate, which is characterized in that a fixed die mounting plate is arranged in the center of the top end of a bottom plate, and a fixed die positioning plate is arranged right above the fixed die mounting plate; the bottom of the fixed mold placing groove penetrates through the fixed mold positioning plate and enters the top of the fixed mold mounting plate; the bottom of the fixed mold core is located at the top end of the fixed mold mounting plate and placed at the bottom of the fixed mold containing groove. The top of the fixed mold core penetrates through the fixed mold containing groove and extends upwards. The movable die set is arranged at the top of the fixed die core and sequentially comprises a movable die plate, a movable die mounting plate, a movable die positioning plate and a top plate from bottom to top, and the die assembly positioning module is arranged between the bottom plate and the top plate and divides a groove punching hole blanking channel, prone to being clamped, in the fixed die core into three sections. The connector forming punch can cut off waste materials in the knife edge groove to enable the waste materials to enter the blanking transition groove, the occurrence rate of material blocking is reduced, the fixed die core is arranged to be detachable, and if the blanking channel is blocked, the fixed die core is easy to detach and clean.
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Description

Technical Field

[0001] The utility model relates to the field of mold design, in particular to the technical field of punching processing of a limit cover plate of a shock absorber, and specifically provides a blanking punching die for a limit cover plate of a shock absorber. Background Art

[0002] When processing a shock absorber limit cover plate, it is necessary to process the central interface groove and one side positioning hole of the shock absorber limit cover plate. However, due to the complex shape of the interface groove part, the milling efficiency of the milling machine is poor. It is necessary to design a blanking punching die for this. It should be noted that the shape of the punching required is relatively complex. During the blanking process, waste materials are very likely to be stuck due to tilting, which blocks the blanking channel. The lower die of the entire mold needs to be disassembled for cleaning, which affects the processing efficiency. It is necessary to design a blanking punching die that is not prone to blockage and is easy to clean if blocked. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a blanking and punching die for a shock absorber limit cover plate, so as to solve the difficulties of the prior art.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a blanking punching die for a limit cover plate of a shock absorber, comprising:

[0005] A bottom plate 1, wherein a fixed mold mounting plate 11 is disposed in the middle of the top of the bottom plate 1, and a fixed mold positioning plate 12 is disposed directly above the fixed mold mounting plate 11;

[0006] A fixed mold placement groove 13, wherein the fixed mold placement groove 13 is opened in the middle of the fixed mold positioning plate 12, and the bottom of the fixed mold placement groove 13 passes through the fixed mold positioning plate 12 and enters the top of the fixed mold mounting plate 11;

[0007] The fixed mold core 2, the bottom of the fixed mold core 2 is located at the top of the fixed mold mounting plate 11 and is placed at the bottom of the fixed mold placement groove 13, and the top of the fixed mold core 2 passes through the fixed mold placement groove 13 and extends upward;

[0008] A movable die set, the movable die set is arranged on the top of the fixed die core 2, and the movable die set comprises a movable die plate 3, a movable die mounting plate 4, a movable die positioning plate 5 and a top plate 6 from bottom to top, and the movable die plate 3, the movable die mounting plate 4, the movable die positioning plate 5 and the top plate 6 are connected by screws;

[0009] The mold closing and positioning module 7 is arranged between the bottom plate 1 and the top plate 6 .

[0010] According to a preferred embodiment, a buffer block 14 is provided around the fixed mold core 2 between the fixed mold mounting plate 11 and the fixed mold positioning plate 12 .

[0011] According to the preferred embodiment, an interface groove punching and blanking channel 21 is provided on the top of the fixed mold core 2, and the interface groove punching and blanking channel 21 is divided into three sections from top to bottom, namely a knife edge groove 211, a blanking transition groove 212 and a blanking trough 213. The knife edge groove 211 is located at the top of the fixed mold core 2, and the inner wall shape and inner diameter of the knife edge groove 211 are the same as those of the interface groove required for stamping, the top of the blanking transition groove 212 is communicated with the knife edge groove 211, and the inner wall shape of the blanking transition groove 212 is communicated with the knife edge groove 211, and the inner diameter of the blanking transition groove 212 is larger than the inner diameter of the knife edge groove 211, and the blanking trough 213 is a square groove, and the top of the blanking transition groove 213 is communicated with the blanking transition groove 212, and the bottom of the blanking trough 213 extends downward through the fixed mold core 2, the fixed mold mounting plate 11 and the bottom plate 1 in sequence, and the groove width and groove length of the blanking transition groove 213 are both larger than the maximum inner diameter of the blanking transition groove 212.

[0012] According to a preferred solution, the depth of the blanking transition groove 212 is less than the depth of the knife edge groove 211 and less than the depth of the blanking groove 213 .

[0013] According to the preferred embodiment, a positioning and mounting hole 22 is opened on the diagonal side of the fixed mold core 2, and the top hole diameter of the positioning and mounting hole 22 is larger than the bottom hole diameter. The top of the fixed mold mounting plate 11 is located at the diagonal side of the bottom of the fixed mold placement groove 13 and an installation threaded hole is opened. The top of the installation threaded hole is communicated with the positioning and mounting hole 22, and a mounting screw 23 is passed through the positioning and mounting hole 22. The bottom of the mounting screw 23 passes through the positioning and mounting hole 22 and is stuck in the mounting threaded hole through threaded cooperation.

[0014] According to the preferred embodiment, a positioning hole forming groove 24 is opened on the top corner of one side of the fixed mold core 2, and the bottom of the positioning hole forming groove 24 extends downward through the fixed mold core 2, the fixed mold mounting plate 11 and the bottom plate 1 in sequence, and the inner diameter of the bottom of the positioning hole forming groove 24 is larger than the inner diameter of the top.

[0015] According to the preferred embodiment, a mold closing limit groove 31 is opened in the middle of the bottom of the movable mold plate 3, the inner wall shape of the mold closing limit groove 31 is the same as the outer shape of the fixed mold core 2, the inner diameter of the mold closing limit groove 31 is larger than the outer diameter of the fixed mold core 2, and an interface forming punch 32 is penetrated in the middle of the mold closing limit groove 31. The top of the interface forming punch 32 passes through the movable mold plate 3 and the movable mold mounting plate 4 and is connected to the movable mold positioning plate 5 through a screw. A positioning hole forming punch 33 is penetrated on the side of the mold closing limit groove 31 close to the top corner, and the positioning hole forming punch 33 is located directly above the positioning hole forming groove 24.

[0016] According to the preferred embodiment, the mold closing and positioning module 7 includes:

[0017] The movable mold stopper column 71 is connected to the bottom end of the top plate 6 and is located on the left and right sides of the movable mold positioning plate 5 through a screw rod;

[0018] A guide sleeve 72, wherein the guide sleeve 72 is connected by bolts and is arranged at the bottom of the top plate 6 and is located on one side of the movable mold stop column 71;

[0019] Guide pillars 73, which are connected by bolts and arranged at the top of the bottom plate 1 on the left and right sides of the fixed mold positioning plate 12, and the tops of the guide pillars 73 are stuck in the guide sleeves 72;

[0020] The fixed mold stop column 74 is connected by a screw and is arranged on the top of the bottom plate 1 and on one side of the guide column 73 . The top of the fixed mold stop column 74 contacts the movable mold stop column 71 .

[0021] The utility model adopts a bottom plate, a fixed mold positioning plate, a fixed mold placement groove, a fixed mold core, a movable mold group and a mold positioning module, and divides the slot punching and blanking channel in the fixed mold core that is easily stuck into three sections. When punching and closing the mold, the interface forming punch punches down on the material plate, and the interface forming punch cuts off the waste material in the knife groove so that the waste material enters the blanking transition groove. The inner diameter of the blanking transition groove is larger than the inner diameter of the knife groove, and the section of the blanking transition groove is shorter. The waste material is not easy to flip over and cause jamming when passing through the blanking transition groove. The waste material enters the material discharge trough, and the material discharge trough is a square groove. The width and depth of the groove are larger than the outer diameter of the waste material, which makes it less likely to get stuck. The fixed mold core is set to be detachable. If the blanking channel is blocked, it is easier to clean up without disassembling the entire lower mold.

[0022] The best embodiment of the present invention will be described in more detail below in conjunction with the accompanying drawings so that the features and advantages of the present invention can be easily understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The display is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 Shown is an enlarged schematic diagram of the three-dimensional structure of the fixed mold core in the utility model;

[0025] Figure 3 It shows an enlarged schematic diagram of the three-dimensional structure of the punching and blanking channel of the interface slot in the present utility model;

[0026] Figure 4 The display is an enlarged schematic diagram of the three-dimensional structure of the fixed mold placement groove in the utility model;

[0027] Figure 5 The display is an enlarged schematic diagram of the three-dimensional structure of the movable mold assembly in the present utility model;

[0028] Description of symbols

[0029] 1. Bottom plate; 11. Fixed mold mounting plate; 12. Fixed mold positioning plate; 13. Fixed mold placement groove; 14. Buffer block;

[0030] 2. Fixed mold core; 21. Interface slot punching and blanking channel; 211. Knife edge slot; 212. Blanking transition slot; 213. Feeding slot; 22. Positioning and mounting hole; 23. Mounting screw; 24. Positioning hole forming slot;

[0031] 3. Moving plate; 31. Mould closing limit groove; 32. Interface forming punch; 33. Positioning hole forming punch;

[0032] 4. Moving mold mounting plate;

[0033] 5. Moving mold positioning plate;

[0034] 6. Top plate;

[0035] 7. Mould closing and positioning module; 71. Moving mould stop column; 72. Guide sleeve; 73. Guide column; 74. Fixed mould stop column; DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the technical solution of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in conjunction with the drawings of the specific embodiments of the utility model. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] Compared with the embodiments shown in the drawings, feasible implementations within the scope of protection of the present invention may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0038] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate quantity restrictions. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] The utility model proposes a punching die for blanking a shock absorber limit cover plate, which is used in the punching process of plate parts. The structure of the bottom plate 1, the fixed die positioning plate 12, the fixed die placement groove 13, the fixed die core 2, the movable die group and the clamping die positioning module 7 in the utility model is particularly suitable for the punching of the shock absorber limit cover plate.

[0040] In general, the shock absorber limit cover plate blanking punching die proposed in the utility model mainly includes: a bottom plate 1, a fixed die positioning plate 12, a fixed die placement groove 13, a fixed die core 2, a movable die group and a mold positioning module 7, among which, you can refer to Figure 1 , which shows the arrangement relationship of the base plate 1, the fixed mold positioning plate 12, the fixed mold placement groove 13, the fixed mold core 2, the movable mold assembly and the mold positioning module 7.

[0041] In the blanking punching die for the shock absorber limit cover plate proposed by the utility model, the interface slot punching blanking channel 21 that is easy to get stuck in the fixed mold core 2 is divided into three sections. When the punching die is closed, the interface forming punch 32 punches down on the material plate. The punch will cut off the waste material in the knife groove 211 so that the waste material enters the blanking transition groove 212. The inner diameter of the blanking transition groove 212 is larger than the inner diameter of the knife groove 211, and the section of the blanking transition groove 212 is shorter. The waste material is not easy to flip over and cause jamming when passing through the blanking transition groove 212. The waste material enters the lower material groove 213. The lower material groove 213 is a square groove. The width and depth of the groove are larger than the outer diameter of the waste material, which is less likely to get stuck. In addition, the fixed mold core 2 is set to be detachable. If the blanking channel is blocked, it is easier to clean without disassembling the entire lower mold.

[0042] A fixed mold mounting plate 11 is arranged in the middle of the top of the bottom plate 1, a fixed mold positioning plate 12 is arranged above the fixed mold mounting plate 11, a fixed mold placement groove 13 is opened in the middle of the fixed mold positioning plate 12, the bottom of the fixed mold placement groove 13 passes through the fixed mold positioning plate 12 and enters the top of the fixed mold mounting plate 11 to form an installation space for the fixed mold core 2, and a buffer block 14 is arranged around the fixed mold core 2 between the fixed mold mounting plate 11 and the fixed mold positioning plate 12 to reduce stamping vibration and improve stability. The bottom of the fixed mold core 2 is located at the top of the fixed mold mounting plate 11 and is placed at the bottom of the fixed mold placement groove 13, and the top of the fixed mold core 2 passes through the fixed mold placement groove 13 and extends upward The top of the fixed mold core 2 is provided with an interface slot punching blanking channel 21, which is divided into three sections from top to bottom: a knife edge slot 211, a blanking transition slot 212 and a blanking slot 213. The depth of the blanking transition slot 212 is less than the depth of the knife edge slot 211 and less than the depth of the blanking slot 213. The knife edge slot 211 is located at the top of the fixed mold core 2. The inner wall shape and inner diameter of the knife edge slot 211 are the same as those of the interface slot to be stamped. The top of the blanking transition slot 212 is connected to the knife edge slot 211, the inner wall shape of the blanking transition slot 212 is connected to the knife edge slot 211, and the inner diameter of the blanking transition slot 212 is larger than that of the knife edge slot 211. The top of the material discharge trough 213 is connected to the blanking transition groove 212, and the bottom of the material discharge trough 213 sequentially passes through the fixed mold core 2, the fixed mold mounting plate 11 and the bottom plate 1 and extends downward. The groove width and groove length of the material discharge trough 213 are both larger than the maximum inner diameter of the blanking transition groove 212. A positioning mounting hole 22 is provided at a diagonal on one side of the fixed mold core 2. The top aperture of the positioning mounting hole 22 is larger than the bottom aperture. The top of the fixed mold mounting plate 11 is located at a diagonal on one side of the bottom of the fixed mold placement groove 13 and a mounting threaded hole is provided. The top of the mounting threaded hole is connected to the positioning mounting hole 22. A mounting screw 23 is passed through the positioning mounting hole 22. The mounting screw 2 The bottom of the fixed mold core 2 passes through the positioning installation hole 22 and is stuck in the installation threaded hole through threaded cooperation, so that the fixed mold core 2 becomes detachable, which is convenient for cleaning and maintenance. A positioning hole forming groove 24 is opened on the top corner of one side of the fixed mold core 2. The bottom of the positioning hole forming groove 24 passes through the fixed mold core 2, the fixed mold installation plate 11 and the bottom plate 1 in sequence and extends downward. The inner diameter of the bottom of the positioning hole forming groove 24 is larger than the inner diameter of the top. The waste material punched out of the positioning hole forming groove 24 is a round piece, and it is not easy to get stuck even if it turns over during the falling process. Therefore, it is not easy to have problems if it is simply set to be small at the top and large at the bottom. If the design is complicated, it will increase the processing cost of the core.

[0043] The above-mentioned movable mold group is arranged on the top of the fixed mold core 2, and the movable mold group is composed of a movable mold plate 3, a movable mold mounting plate 4, a movable mold positioning plate 5 and a top plate 6 from bottom to top. The movable mold plate 3, the movable mold mounting plate 4, the movable mold positioning plate 5 and the top plate 6 are connected by screws. A mold closing limit groove 31 is opened in the middle of the bottom of the movable mold plate 3. The inner wall shape of the mold closing limit groove 31 is the same as the outer side shape of the fixed mold core 2. The inner diameter of the mold closing limit groove 31 is larger than the outer diameter of the fixed mold core 2. An interface forming punch 32 is penetrated in the middle of the mold closing limit groove 31. The top of the interface forming punch 32 passes through the movable mold plate 3, the movable mold mounting plate 4 is connected to the movable mold positioning plate 5 by a screw, and a positioning hole forming punch 33 is penetrated on the side of the mold closing limit groove 31 close to the top corner, and the positioning hole forming punch 33 is located directly above the positioning hole forming groove 24.

[0044] The above-mentioned mold closing and positioning module 7 is arranged between the bottom plate 1 and the top plate 6, and the mold closing and positioning module 7 includes: a movable mold stop column 71, a guide sleeve 72, a guide column 73, and a fixed mold stop column 74, wherein the movable mold stop column 71 is arranged at the bottom end of the top plate 6 through a screw connection and is located on the left and right sides of the movable mold positioning plate 5, the guide sleeve 72 is arranged at the bottom of the top plate 6 through a bolt connection and is located on one side of the movable mold stop column 71, the guide column 73 is arranged at the top end of the bottom plate 1 through a bolt connection and is located on the left and right sides of the fixed mold positioning plate 12, the top end of the guide column 73 is stuck in the guide sleeve 72, the fixed mold stop column 74 is arranged at the top end of the bottom plate 1 through a screw connection and is located on one side of the guide column 73, the top end of the fixed mold stop column 74 is in contact with the movable mold stop column 71, the guide column 73 and the guide sleeve 72 play a positioning role when the fixed mold core 2 and the movable mold plate 3 are closed, and the movable mold stop column 71 and the fixed mold stop column 74 prevent overshoot.

[0045] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A blanking punching die for a shock absorber limit cover plate, characterized in that: include: A bottom plate (1), wherein a fixed mold mounting plate (11) is arranged in the middle of the top of the bottom plate (1), and a fixed mold positioning plate (12) is arranged directly above the fixed mold mounting plate (11); A fixed mold placement groove (13), wherein the fixed mold placement groove (13) is arranged in the middle of the fixed mold positioning plate (12), and the bottom of the fixed mold placement groove (13) passes through the fixed mold positioning plate (12) and enters the top of the fixed mold mounting plate (11); A fixed mold core (2), the bottom of the fixed mold core (2) is located at the top of the fixed mold mounting plate (11) and is placed at the bottom of the fixed mold placement groove (13), and the top of the fixed mold core (2) passes through the fixed mold placement groove (13) and extends upward; A movable die assembly, wherein the movable die assembly is arranged on the top of the fixed die core (2), and the movable die assembly comprises, from bottom to top, a movable die plate (3), a movable die mounting plate (4), a movable die positioning plate (5) and a top plate (6), wherein the movable die plate (3), the movable die mounting plate (4), the movable die positioning plate (5) and the top plate (6) are connected by screws; A mold closing and positioning module (7), wherein the mold closing and positioning module (7) is arranged between the bottom plate (1) and the top plate (6).

2. The blanking punching die for the shock absorber limit cover sheet according to claim 1, characterized in that: A buffer block (14) is arranged between the fixed mold mounting plate (11) and the fixed mold positioning plate (12) and around the fixed mold core (2).

3. The blanking punching die for the shock absorber limit cover sheet according to claim 2, characterized in that: The top of the fixed mold core (2) is provided with an interface slot punching blanking channel (21), and the interface slot punching blanking channel (21) is divided into three sections from top to bottom, namely, a knife edge slot (211), a blanking transition slot (212), and a blanking slot (213). The knife edge slot (211) is located at the top of the fixed mold core (2), and the inner wall shape and inner diameter of the knife edge slot (211) are the same as those of the interface slot to be punched, and the top of the blanking transition slot (212) is communicated with the knife edge slot (211). 12) The inner wall shape is connected to the knife edge groove (211), the inner diameter of the blanking transition groove (212) is larger than the inner diameter of the knife edge groove (211), the lower material groove (213) is a square groove, the top of the lower material groove (213) is connected to the blanking transition groove (212), the bottom of the lower material groove (213) passes through the fixed mold core (2), the fixed mold mounting plate (11) and the bottom plate (1) in sequence and extends downward, and the groove width and groove length of the lower material groove (213) are both larger than the maximum inner diameter of the blanking transition groove (212).

4. The blanking punching die for the shock absorber limit cover sheet according to claim 3, characterized in that: The depth of the blanking transition groove (212) is smaller than the depth of the knife edge groove (211) and smaller than the depth of the blanking groove (213).

5. The blanking punching die for the shock absorber limit cover sheet according to claim 4, characterized in that: A positioning installation hole (22) is provided at a diagonal position on one side of the fixed mold core (2), the top diameter of the positioning installation hole (22) is larger than the bottom diameter, and a mounting threaded hole is provided at a diagonal position on one side of the bottom of the fixed mold placement groove (13) at the top of the fixed mold installation plate (11), the top of the mounting threaded hole is communicated with the positioning installation hole (22), a mounting screw (23) is inserted into the positioning installation hole (22), and the bottom of the mounting screw (23) passes through the positioning installation hole (22) and is clamped in the mounting threaded hole through threaded engagement.

6. The blanking punching die for the shock absorber limit cover sheet according to claim 5, characterized in that: A positioning hole forming groove (24) is provided at a top corner of one side of the fixed mold core (2), the bottom of the positioning hole forming groove (24) sequentially passes through the fixed mold core (2), the fixed mold mounting plate (11) and the bottom plate (1) and extends downward, and the inner diameter of the bottom of the positioning hole forming groove (24) is greater than the inner diameter of the top.

7. The blanking punching die for the shock absorber limit cover sheet according to claim 6, characterized in that: A mold closing limit groove (31) is provided in the middle of the bottom of the movable mold plate (3), the inner wall shape of the mold closing limit groove (31) is the same as the outer shape of the fixed mold core (2), the inner diameter of the mold closing limit groove (31) is larger than the outer diameter of the fixed mold core (2), an interface forming punch (32) is passed through the middle of the mold closing limit groove (31), the top of the interface forming punch (32) passes through the movable mold plate (3) and the movable mold mounting plate (4) and is connected to the movable mold positioning plate (5) through a screw, and a positioning hole forming punch (33) is passed through the side of the mold closing limit groove (31) close to the top corner, and the positioning hole forming punch (33) is located directly above the positioning hole forming groove (24).

8. The blanking punching die for the shock absorber limit cover sheet according to claim 7, characterized in that: The mold closing and positioning module (7) comprises: A movable mold stop column (71), wherein the movable mold stop column (71) is connected to the bottom end of the top plate (6) and is located on the left and right sides of the movable mold positioning plate (5) through a screw rod; A guide sleeve (72), the guide sleeve (72) being arranged at the bottom of the top plate (6) and located on one side of the movable mold stop column (71) through bolt connection; Guide pillars (73), the guide pillars (73) are arranged on the top of the bottom plate (1) and located on the left and right sides of the fixed mold positioning plate (12) through bolt connection, and the top of the guide pillars (73) is clamped in the guide sleeve (72); A fixed mold stop column (74) is connected to the bottom plate (1) via a screw and arranged on the top of the bottom plate (1) on one side of the guide column (73). The top of the fixed mold stop column (74) contacts the movable mold stop column (71).