Punching device of die and die

Abstract

The utility model discloses a punching device of a die and the die, and relates to the technical field of punching tools, the punching device comprises a mounting plate, a driving piece, a transmission mechanism and a punching needle; the mounting plate is connected with a mold; the driving part is mounted on the mounting plate; the transmission mechanism comprises a transmission piece and a movable block, the two ends of the movable block are the first end and the second end respectively, and the first end of the movable block is connected with an output shaft of the driving piece through the transmission piece. One end, far away from the movable block, of the punching needle is provided with a needle head; the driving piece is used for driving the transmission piece and the movable block to move close to or away from the needle hole through the output shaft so as to correspondingly drive the needle head on the punching needle to penetrate through the needle hole to enter and exit from the cavity. The punching device is better in hole forming effect and capable of directly punching a workpiece on the die, and production cost is reduced.

Description

Punching device for molds and molds Technical Field

[0001] This utility model relates to the field of punching tool technology, and in particular to a punching device and a mold. Background Technology

[0002] In existing workpiece manufacturing processes, one method involves using mold manufacturing. The mold contains a cavity, which is used for injection molding (including plastics, molten resin, etc., with molten resin as an example below) to obtain the workpiece. The shape and size of the cavity are set according to the shape and size of the workpiece to be prepared. Currently, some workpieces require drilling, such as when the workpiece is a bumper, the holes are needed to install specific logos.

[0003] Currently, there are two methods for forming holes in workpieces. One method is to directly form the hole on the mold. This involves setting up structures such as clearance pillars on the mold corresponding to the positions on the workpiece where the hole needs to be formed. When injection molding into the cavity, the molten resin flows directly around the clearance pillars, thus forming the hole directly at the clearance pillar position. However, this method can easily lead to different flow directions of the molten resin when passing through the clearance pillars, resulting in weld lines at the hole position and causing appearance defects in the workpiece, resulting in poor performance. The other method involves injection molding the workpiece in the mold, then removing the workpiece from the mold and drilling it using specific drilling equipment. This requires manual operation of the drilling equipment, which adds the process of workpiece transfer and manual drilling, resulting in lower overall production efficiency and higher production costs. Summary of the Invention

[0004] The main purpose of this utility model is to propose three themes, namely, Theme 1, Theme 2, and Theme 3, which aim to solve the technical problems of poor performance and high production cost of existing methods for forming holes in workpieces.

[0005] To achieve the above objectives, this utility model proposes a punching device for a mold. The mold has a cavity for injection molding into a workpiece, and the mold has pinholes communicating with the cavity. The punching device is disposed outside the mold corresponding to the pinholes. The punching device includes:

[0006] Mounting plate, the mounting plate being used to connect to the mold;

[0007] A driving component, which is mounted on the mounting plate;

[0008] A transmission mechanism, comprising a transmission component and a movable block, wherein the two ends of the movable block are a first end and a second end, and the first end of the movable block is connected to the output shaft of the driving component through the transmission component;

[0009] A punch is disposed at the second end of the movable block, and a needle tip is provided at the end of the punch away from the movable block;

[0010] The drive unit is used to drive the transmission unit and the movable block to move toward or away from the pin hole via the output shaft, so as to drive the needle on the punch to pass through the pin hole and enter and exit the cavity.

[0011] In one embodiment, the driving member and the transmission mechanism are respectively disposed on opposite sides of the mounting plate. The mounting plate has a clearance through hole. One end of the output shaft extends into the clearance through hole. The transmission member is disposed between the movable block and the mounting plate. One end of the transmission member extends into the clearance through hole and is connected to the output shaft. The other end of the transmission member is limited and connected to the first end.

[0012] In one embodiment, the transmission component includes a transmission rod and a transmission block connected to each other, wherein one end of the transmission rod away from the transmission block extends into the clearance through hole and is connected to the output shaft;

[0013] The movable block has a limiting groove, and the first end has a slot that communicates with the limiting groove. The transmission block is limitedly connected to the limiting groove, and the transmission rod passes through the slot.

[0014] In one embodiment, a limiting block is provided on the side wall of the limiting groove near the first end, the limiting block surrounds the groove opening, the side wall of the limiting groove opposite to the groove opening is the bottom groove wall, and the transmission block is limited between the limiting block and the bottom groove wall.

[0015] The movable block is also provided with a clearance opening on one side that communicates with the limiting groove, and the clearance opening is connected to the limiting groove and the groove opening, so that the transmission block can enter the limiting groove from the clearance opening.

[0016] In one embodiment, along the extension and retraction direction of the output shaft, the thickness of the transmission block is less than the distance between the bottom groove wall and the limiting block, and the outer peripheral side of the transmission rod slides in conjunction with the groove opening.

[0017] In one embodiment, a mounting cavity is formed within the movable block, and an opening communicating with the mounting cavity is provided at the first end. The movable block has a plug-in portion, and the plug-in portion is located at the end of the mounting cavity away from the opening. The end of the punch away from the needle head is plugged into the plug-in portion.

[0018] In one embodiment, the insertion part has an insertion hole that communicates with the mounting cavity, the end of the punch away from the needle tip forms a first limiting step, and the hole wall of the insertion hole and the position close to the mounting cavity forms a second limiting step that abuts against the first limiting step.

[0019] In one embodiment, a stop is connected inside the mounting cavity and near the insertion portion, and the end of the first limiting step away from the needle abuts against the stop.

[0020] In one embodiment, one of the movable block and the mold is provided with a guide post, and the other is provided with a guide hole corresponding to the position of the guide post. The guide post can extend into the guide hole and slide in cooperation with the guide hole.

[0021] This utility model also proposes a mold, wherein the mold is provided with a cavity for injection molding into a workpiece, and the mold is provided with a pinhole communicating with the cavity. A punching device as described above is installed on the outside of the mold corresponding to the position of the pinhole, and the mounting plate of the punching device is connected to the mold.

[0022] The punching device for molds provided by this utility model improves the relative stability between the punching device and the mold by using a mounting plate connected to the mold. The driving component is set on the mounting plate to ensure the stability of the driving component during operation. The transmission mechanism includes a transmission component and a movable block. The first end of the movable component is connected to the output shaft of the driving component through the transmission component. The output shaft of the driving component can drive the transmission component to move, thereby moving the movable block closer to or away from the pin hole, and then driving the punch set on the movable block to move so that the needle on the punch can pass through the pin hole and enter and exit the cavity. Therefore, after the molten resin for molding the workpiece is injected into the cavity, the needle can be directly driven to enter and exit the cavity through the driving component to form a hole on the workpiece, which has a better effect and higher efficiency.

[0023] Compared to existing technologies that use structures like clearance posts on the mold to form holes, the punching device in this invention can drive the needle into the cavity to punch holes after the plastic has been injected into the cavity. This avoids the problem of weld lines caused by different flow directions when injecting molten resin into the cavity, resulting in better hole formation. In addition, compared to existing technologies that use additional drilling equipment, the punching device in this invention is installed on the mold and can directly punch holes in the workpiece on the mold. This reduces the need for additional steps of transferring the workpiece and manually drilling with drilling equipment, improving production efficiency and reducing production costs.

[0024] Furthermore, the output shaft drives the movable block through a transmission component. This transmission component not only accurately transmits the power of the output shaft to the movable block to move it, but also provides a certain guiding function, ensuring the precision of the power transmission of the output shaft and ensuring consistent punching force and punching effect of the needle. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 is a schematic diagram of the structure of a mold provided in an embodiment of the present invention;

[0027] Figure 2 is an exploded view of a mold provided in an embodiment of the present invention;

[0028] Figure 3 is a partial exploded view of a mold provided in an embodiment of the present invention;

[0029] Figure 4 is a magnified view of part A in Figure 3;

[0030] Figure 5 is a partial structural cross-sectional view of a mold provided in an embodiment of the present invention;

[0031] Figure 6 is a magnified view of part B in Figure 5;

[0032] Figure 7 is a magnified view of part C in Figure 6;

[0033] Figure 8 is a schematic diagram of the punching device provided in an embodiment of the present invention;

[0034] Figure 9 is a front view schematic diagram of a punching device provided in an embodiment of the present invention;

[0035] Figure 10 is a schematic diagram of the structure of the movable block in a punching device provided in an embodiment of the present invention;

[0036] Figure 11 is a front view of the movable block in a punching device provided in an embodiment of the present invention;

[0037] Figure 12 is a schematic diagram of the punch and abutment block in a punching device provided in an embodiment of the present invention.

[0038] Explanation of icon numbers:

[0039] 100. Punching device; 1. Mounting plate; 11. Clearance through hole; 2. Driving component; 21. Output shaft; 3. Transmission mechanism; 31. Transmission component; 311. Transmission rod; 312. Transmission block; 32. Movable block; 321. First end; 322. Second end; 323. Limiting groove; 3231. Limiting block; 3232. Groove opening; 3233. Bottom groove wall; 324. Mounting cavity; 3241. Opening; 3242. Stop block; 325. Insertion part; 3251. Insertion hole; 3252. Second limiting step; 326. Guide hole; 327. Abutment block; 328. Clearance opening; 4. Punch; 41. Needle head; 42. First limiting step;

[0040] 200. Mold; 201. Fixed mold plate; 202. Moving mold plate; 203. Cavity; 204. Pinhole; 205. First slide rail; 206. Second slide rail; 207. Guide pillar;

[0041] 300. Workpiece.

[0042] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0044] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0045] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0046] This utility model proposes a punching device 100 for a mold 200.

[0047] Please refer to Figures 1, 3-6, and 8. In one embodiment of this utility model, a cavity 203 for injection molding into a workpiece 300 is provided inside the mold 200, and a pin hole 204 communicating with the cavity 203 is provided in the mold 200. A punching device 100 is provided outside the mold 200 corresponding to the pin hole 204. The punching device 100 includes a mounting plate 1, a driving component 2, a transmission mechanism 3, and a punch 4. The mounting plate 1 is used to connect with the mold 200. The driving component 2 is mounted on the mounting plate 1. The transmission mechanism 3 includes a transmission component 31 and a... The movable block 32 has a first end 321 and a second end 322 at its two ends. The first end 321 of the movable block 32 is connected to the output shaft 21 of the drive member 2 through the transmission member 31. The punch 4 is disposed at the second end 322 of the movable block 32, and the end of the punch 4 away from the movable block 32 is provided with a needle 41. The drive member 2 is used to drive the transmission member 31 and the movable block 32 to move towards or away from the needle hole 204 through the output shaft 21, so as to drive the needle 41 on the punch 4 to pass through the needle hole 204 and enter and exit the cavity 203.

[0048] The punching device 100 of the mold 200 provided by this utility model is connected to the mold 200 by a mounting plate 1 to improve the relative stability between the punching device 100 and the mold 200. The driving component 2 is set on the mounting plate 1 to ensure the stability of the driving component 2 during operation. The transmission mechanism 3 includes a transmission component 31 and a movable block 32. The first end 321 of the movable component is connected to the output shaft 21 of the driving component 2 through the transmission component 31. The output shaft 21 of the driving component 2 can drive the transmission component 31 to move, thereby driving the movable block 32 to move closer to or away from the pin hole 204, and then driving the punch 4 set on the movable block 32 to move so that the needle 41 on the punch 4 can pass through the pin hole 204 and enter and exit the cavity 203. Therefore, after the molten resin for molding the workpiece 300 is injected into the cavity 203, the needle 41 is directly driven to enter and exit the cavity 203 by the driving component 2, thereby forming a hole on the workpiece 300, which has a better effect and higher efficiency.

[0049] Compared to the existing technology of forming holes by setting avoidance pillars or other structures on the mold 200, the punching device 100 in this embodiment can control the needle 41 to enter the cavity 203 for punching after the plastic has been injected into the cavity 203. This avoids the problem of weld lines caused by different flow directions when injecting molten resin into the cavity 203, resulting in better hole formation. In addition, compared to the existing technology of drilling through additional drilling equipment, the punching device 100 in this embodiment is installed on the mold 200 and can directly punch the workpiece 300 on the mold 200. This reduces the step of manually drilling the workpiece 300 using drilling equipment, improves production efficiency, and reduces production costs.

[0050] Furthermore, the output shaft 21 drives the movable block 32 through the transmission component 31. The transmission component 31 can not only accurately transmit the power of the output shaft 21 to the movable block 32 to drive the movable block 32 to move, but also has a certain guiding function, ensuring the accuracy of the power transmission of the output shaft 21 and providing the movable block 32 with power in the same direction, ensuring that the punching force of the needle 41 is consistent and the punching effect is consistent, which is more reliable.

[0051] In one specific embodiment, after the molten resin is injected into the cavity 203, the drive member 2 drives the transmission mechanism 3 to move toward the cavity 203 via the drive shaft, thereby driving the punch 4 to move toward the cavity 203 so that the needle 41 passes through the needle hole 204 and extends into the cavity 203. After the molten resin solidifies and forms the workpiece 300 in the cavity 203, the drive member 2 drives the transmission mechanism 3 to move away from the cavity 203 via the drive shaft, so that the punch 4 moves away from the cavity 203 so that the needle 41 is withdrawn from the cavity 203.

[0052] Understandably, the above method ensures that when molten resin is injected into the cavity 203, the needle 41 without punch 4 in the cavity 203 does not affect the flow direction of the molten resin and thus cause weld lines. After the molten resin fills the cavity 203 and before it solidifies, the unsolidified molten resin allows the needle 41 to penetrate the cavity 203 more easily, and the unsolidified molten resin can automatically fill the area around the needle 41, thereby forming a hole with better aesthetics, better punching effect, and better overall quality of the workpiece 300.

[0053] It should be noted that the pinhole corresponds to the position of the workpiece 300 to be punched. The position of the pinhole and the position of the punching device are set according to the different positions of the workpiece 300 to be punched.

[0054] In one specific embodiment, the driving member 2 may be a telescopic driving member 2 in the prior art, which extends and retracts relative to the telescopic driving member 2 via the drive output shaft 21, thereby driving the transmission member 31 and the movable block 32 to move toward or away from the pinhole 204.

[0055] As shown in Figures 1, 2, and 6, the mold 200 further includes a fixed template 201 and a movable template 202. The movable template 202 is detachably connected to the fixed template 201 and forms a cavity 203. The fixed template 201 has pinholes 204 communicating with the cavity 203. The mounting plate 1 is connected to the fixed template 201. The fixed template 201 has a first slide 205 and a second slide 206 that communicate with each other. The end of the second slide 206 away from the first slide 205 has pinholes 204 communicating with the cavity 203. The fixed template 201 is located away from the cavity 203. The outer side of the 3 has an entrance that communicates with the first slide 205. The transmission mechanism 3 is located in the first slide 205 and slides in cooperation with the first slide 205. The punch 4 is located in the second slide 206 and cooperates with the second slide 206. The drive member 2 is used to drive the transmission mechanism 3 to slide in the first slide 205 toward or away from the second slide 206 through the output shaft 21, and drive the punch 4 to slide in the first slide 205 toward or away from the needle hole 204, so as to drive the needle 41 on the punch 4 to pass through the needle hole 204 and enter and exit the cavity 203.

[0056] In this embodiment, by setting a first slide rail 205 and a second slide rail 206 on the template 201, the transmission mechanism 3 is placed in the first slide rail 205 and slides in cooperation with it. At the same time, the punch 4 is located in the second slide rail 206 and slides in cooperation with it. This not only reduces the influence of external factors on the sliding of the transmission mechanism 3 and the punch 4, but also enables precise control of the movement path of the punch 4, avoids the punch 4 from deviating, ensures that the position of each punch is extremely accurate, improves the reliability of punching, and ensures consistent punching effect.

[0057] Specifically, the movable block 32 is located within the first slide rail 205 and slides in cooperation with the first slide rail 205, ensuring that the movable block 32 slides more flexibly and smoothly, thereby ensuring that the needle 41 of the punch 4 can accurately enter and exit the cavity 203 for drilling operations, while reducing vibration or offset due to the movement of the movable block 32 and improving drilling accuracy.

[0058] As shown in Figures 8 and 9, in one embodiment, the driving component 2 and the transmission mechanism 3 are respectively disposed on opposite sides of the mounting plate 1. The mounting plate 1 has a clearance through hole 11. One end of the output shaft 21 extends into the clearance through hole 11. The transmission component 31 is disposed between the movable block 32 and the mounting plate 1. One end of the transmission component 31 extends into the clearance through hole 11 and is connected to the output shaft 21. The other end of the transmission component 31 is limited and connected to the first end 321.

[0059] In this embodiment, the drive component 2 and the transmission mechanism 3 are respectively disposed on opposite sides of the mounting plate 1, and the output shaft 21 and the transmission component 31 are connected through the clearance through hole 11. This design makes full use of space, making the structure of the punching device 100 more compact and reducing the volume of the punching device 100. The transmission component 31 is disposed between the movable block 32 and the mounting plate 1, and one end of it is extended into the clearance through hole 11 and connected to the output shaft 21, while the other end is limitedly connected to the first end 321 of the movable block 32. The clearance through hole 11 can also provide a more stable force transmission direction, improving the stability and reliability of the power transmission.

[0060] In addition, the clearance through hole 11 also facilitates the assembly and connection of the transmission component 31 and the output shaft 21.

[0061] As shown in Figures 8 and 9, in one embodiment, the transmission component 31 includes a transmission rod 311 and a transmission block 312 connected to each other. The end of the transmission rod 311 away from the transmission block 312 extends into the clearance through hole 11 and is connected to the output shaft 21. A limiting groove 323 is provided on the movable block 32. A slot 3232 communicating with the limiting groove 323 is provided on the first end 321. The transmission block 312 is limitedly connected in the limiting groove 323, and the transmission rod 311 passes through the slot 3232.

[0062] In this embodiment, by dividing the transmission component 31 into two interconnected parts, a transmission rod 311 and a transmission block 312, and by positioning the transmission block 312 within the limiting groove 323 of the movable block 32, this design increases the connection stability between the transmission component 31 and the movable block 32, ensures the effective transmission of power from the output shaft 21, reduces the misalignment between the transmission component 31 and the movable block 32 caused by vibration or impact, and facilitates assembly by providing a slot 3232 through which the transmission rod 311 passes, further preventing mutual offset between the transmission component 31 and the movable block 32.

[0063] As shown in Figures 8 and 9, in one embodiment, a limiting block 3231 is provided on the side wall of the limiting groove near the first end 321 323, and the limiting block 3231 forms a groove opening 3232. The side wall of the limiting groove 323 opposite to the groove opening 3232 is a bottom groove wall 3233. The transmission block 312 is limited between the limiting block 3231 and the bottom groove wall 3233. A clearance opening 328 communicating with the limiting groove 323 is also provided on one side of the movable block 32, and the clearance opening 328 is connected with the limiting groove 323 and the groove opening 3232. The transmission block 312 can enter the limiting groove 323 from the clearance opening 328.

[0064] In this embodiment, by setting a limiting block 3231 on the groove wall of the limiting groove 323 near the first end 321, and making the limiting block 3231 form a groove 3232, and simultaneously limiting and connecting the transmission block 312 between the limiting block 3231 and the bottom wall 3233, it can be ensured that the transmission block 312 always stays in the limiting groove 323 during the movement, which improves stability. In addition, the design of the clearance opening 328 allows the transmission block 312 to enter the limiting groove 323 from one side of the movable block 32, which greatly simplifies the installation process of the transmission block 312.

[0065] As shown in Figure 9, in one embodiment, along the extension and retraction direction of the output shaft 21, the thickness of the transmission block 312 is less than the distance between the bottom groove wall 3233 and the limiting block 3231, and the outer peripheral side of the transmission rod 311 slides in conjunction with the groove 3232.

[0066] Understandably, by designing the thickness of the transmission block 312 to be less than the distance between the bottom wall 3233 and the limiting block 3231, sufficient movement space is ensured for the transmission block 312 in the extension and retraction direction along the output shaft 21. After the transmission component 31 moves a certain distance, it abuts against the movable block 32, thereby driving the movable block 32 to move a shorter distance. Thus, the output shaft 21 can drive the movable block 32 to move slightly, thereby improving the stability and accuracy of the needle 41 when it moves. Furthermore, according to specific punching requirements, such as the depth of the hole, the thickness of the transmission block 312 and / or the distance between the bottom wall 3233 and the limiting block 3231 can be appropriately adjusted, or the movement distance of the movable block 32 can be adjusted by directly replacing the transmission component 31 with a different thickness of the transmission block 312, which has strong flexibility.

[0067] In specific use, when the output shaft 21 extends toward the cavity 203, it drives the transmission block 312 to move within the limiting groove 323 until it abuts against the bottom wall 3233, and then drives the movable block 32 to move toward the cavity 203. When the output shaft 21 retracts, it drives the transmission block 312 to move within the limiting groove 323 until it abuts against the limiting block 3231, and then drives the movable block 32 to move away from the cavity 203.

[0068] Please refer to Figures 7, 10-12. In one embodiment, a mounting cavity 324 is formed in the movable block 32, and an opening 3241 communicating with the mounting cavity 324 is provided at the first end 321. The movable block 32 has a plug-in portion 325, and the plug-in portion 325 is located at the end of the mounting cavity 324 away from the opening 3241. One end of the punch 4 away from the needle tip 41 is plugged into the plug-in portion 325.

[0069] In this embodiment, by forming a mounting cavity 324 within the movable block 32 and opening 3241 at the first end 321 communicating with the mounting cavity 324, the punch 4 can easily enter the mounting cavity 324 through the opening 3241, then pass through the insertion part 325 and extend from the second end 322 of the movable block 32, where it is inserted into the insertion part 325. This greatly facilitates the installation and replacement of the punch 4, making disassembly and installation more convenient, and also ensures a more stable connection between the punch 4 and the movable block 32.

[0070] As shown in Figures 11 and 12, in one embodiment, the insertion part 325 has an insertion hole 3251 that communicates with the mounting cavity 324. The end of the punch 4 away from the needle 41 forms a first limiting step 42. The hole wall of the insertion hole 3251 and the position close to the mounting cavity 324 forms a second limiting step 3252 that abuts against the first limiting step 42.

[0071] Understandably, by creating a socket 3251 in the insertion part 325 and forming a first limiting step 42 at the end of the punch 4 away from the needle tip 41, while simultaneously forming a second limiting step 3252 on the wall of the socket 3251 near the mounting cavity 324, the two can abut against each other. This design ensures a secure connection between the punch 4 and the movable block 32, preventing the punch 4 from loosening or shifting during operation and enhancing the stability of the overall structure.

[0072] In one embodiment, a stop 3242 is connected inside the mounting cavity 324 and near the insertion part 325, and the end of the first limiting step 42 away from the needle 41 abuts against the stop 3242.

[0073] Understandably, the stop block 3242 provides an additional support point for the punch 4, making the punch 4 more stable during punching operations. Especially under high pressure or high impact conditions, the stop block 3242 can effectively prevent the punch 4 from shifting relative to the movable block 32, ensuring the accuracy of the punching position and guaranteeing consistent punching results.

[0074] Specifically, the stop block 3242 is installed in the mounting cavity 324 by bolts.

[0075] Please continue to refer to Figure 7. In one embodiment, one of the movable block 32 and the mold 200 is provided with a guide post 207, and the other is provided with a guide hole 326 corresponding to the position of the guide post 207. The guide post 207 can extend into the guide hole 326 and slide in cooperation with the guide hole 326.

[0076] Understandably, the cooperation between the guide post 207 and the guide hole 326 ensures that the movable block 32 can move accurately along the preset path during movement. This helps reduce positional errors caused by the movable block 32 deviating from the movement path, ensuring that the punch 4 can accurately enter and exit the cavity 203 each time, thus improving the accuracy of the drilling operation.

[0077] In one specific embodiment, the guide post 207 is disposed in the first slide 205 and close to one side wall of the second slide 206, and the second end 322 of the movable block 32 is provided with a guide hole 326.

[0078] Please refer to Figure 8. In one embodiment, the first end 321 of the movable block 32 is further provided with a plurality of abutment blocks 327. The plurality of abutment blocks 327 are used to abut against the side wall of the first slide 205 near the second slide 206, thereby buffering the movable block 32, reducing the collision force between the movable block 32 and the side wall of the first slide 205 near the second slide 206, and preventing damage to the movable block 32.

[0079] Furthermore, the first end 321 is provided with connecting holes corresponding to the positions of each abutment block 327. A spring is installed in the connecting hole. One end of the abutment block 327 extends into the connecting hole and abuts against one end of the spring. The other end of the spring abuts against the bottom wall 3233 of the connecting hole away from the first end 321. Thus, the spring can achieve a better buffering effect.

[0080] This utility model also proposes a mold 200, which has a cavity 203 for injection molding into a workpiece 300, and a pinhole 204 communicating with the cavity 203. A punching device 100 as described above is installed on the outside of the mold 200 at the position corresponding to the pinhole 204, and the mounting plate 1 of the punching device 100 is connected to the mold 200.

[0081] Specifically, the mold 200 includes a fixed template 201 and a movable template 202. The movable template 202 is detachably connected to the fixed template 201 and forms a cavity 203. The fixed template 201 has pinholes 204 communicating with the cavity 203. The mounting plate 1 is connected to the fixed template 201. The fixed template 201 has a first slide 205 and a second slide 206 that communicate with each other. The end of the second slide 206 away from the first slide 205 has pinholes 204 communicating with the cavity 203. The outer side of the fixed template 201 away from the cavity 203 has... The inlet is connected to the first slide 205. The transmission mechanism 3 is located in the first slide 205 and slides in cooperation with the first slide 205. The punch 4 is located in the second slide 206 and cooperates with the second slide 206. The drive member 2 is used to drive the transmission mechanism 3 to slide in the first slide 205 toward or away from the second slide 206 through the output shaft 21, and drive the punch 4 to slide in the first slide 205 toward or away from the needle hole 204, so as to drive the needle 41 on the punch 4 to pass through the needle hole 204 and enter and exit the cavity 203.

[0082] In this embodiment, by setting a first slide rail 205 and a second slide rail 206 on the template 201, the transmission mechanism 3 is placed in the first slide rail 205 and slides in cooperation with it. At the same time, the punch 4 is located in the second slide rail 206 and slides in cooperation with it. This not only reduces the influence of external factors on the sliding of the transmission mechanism 3 and the punch 4, but also enables precise control of the movement path of the punch 4, avoids the punch 4 from deviating, ensures that the position of each punch is extremely accurate, improves the reliability of punching, and ensures consistent punching effect.

[0083] Specifically, the movable block 32 is located within the first slide rail 205 and slides in cooperation with the first slide rail 205, ensuring that the movable block 32 slides more flexibly and smoothly, thereby ensuring that the needle 41 of the punch 4 can accurately enter and exit the cavity 203 for drilling operations, while reducing vibration or offset due to the movement of the movable block 32 and improving drilling accuracy.

[0084] The specific structure of the punching device 100 of the mold 200 is as described in the above embodiments. Since the mold 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0085] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A punching device for a mold, characterized in that, The mold has a cavity for injection molding into a workpiece, and the mold has a pinhole communicating with the cavity. The punching device is disposed outside the mold corresponding to the pinhole. The punching device includes: a mounting plate for connecting to the mold; a driving component mounted on the mounting plate; a transmission mechanism including a transmission element and a movable block, the two ends of the movable block being a first end and a second end, the first end of the movable block being connected to the output shaft of the driving component through the transmission element; and a punch disposed at the second end of the movable block, with a needle tip at the end of the punch away from the movable block. The driving component drives the transmission element and the movable block to move towards or away from the pinhole through the output shaft, so as to correspondingly drive the needle tip on the punch to pass through the pinhole and enter and exit the cavity.

2. The punching device for the mold as described in claim 1, characterized in that, The driving component and the transmission mechanism are respectively disposed on opposite sides of the mounting plate. The mounting plate has a clearance through hole. One end of the output shaft extends into the clearance through hole. The transmission component is disposed between the movable block and the mounting plate. One end of the transmission component extends into the clearance through hole and is connected to the output shaft. The other end of the transmission component is limited and connected to the first end.

3. The punching device for the mold as described in claim 2, characterized in that, The transmission component includes a transmission rod and a transmission block connected to each other. The end of the transmission rod away from the transmission block extends into the clearance through hole and is connected to the output shaft. A limiting groove is formed on the movable block. A slot communicating with the limiting groove is formed at the first end. The transmission block is limitedly connected in the limiting groove, and the transmission rod passes through the slot.

4. The punching device for the mold as described in claim 3, characterized in that, A limiting block is provided on the side wall of the limiting groove near the first end, and the limiting block forms the groove opening. The side wall of the limiting groove opposite to the groove opening is the bottom groove wall. The transmission block is located between the limiting block and the bottom groove wall. A clearance opening is also provided on one side of the movable block, which communicates with the limiting groove. The clearance opening communicates with both the limiting groove and the groove opening, and the transmission block can enter the limiting groove from the clearance opening.

5. The punching device for the mold as described in claim 4, characterized in that, Along the extension and retraction direction of the output shaft, the thickness of the transmission block is less than the distance between the bottom groove wall and the limiting block, and the outer peripheral side of the transmission rod slides in conjunction with the groove opening.

6. The punching device for the mold as described in any one of claims 1 to 5, characterized in that, The movable block has an installation cavity, and the first end has an opening communicating with the installation cavity. The movable block has a plug-in part, and the plug-in part is located at the end of the installation cavity away from the opening. The end of the punch away from the needle head is plugged into the plug-in part.

7. The punching device for the mold as described in claim 6, characterized in that, The insertion part has an insertion hole that communicates with the mounting cavity. The end of the punch away from the needle head forms a first limiting step. The hole wall of the insertion hole and the position close to the mounting cavity forms a second limiting step that abuts against the first limiting step.

8. The punching device for the mold as described in claim 7, characterized in that, A stop is connected inside the mounting cavity and near the insertion part, and the end of the first limiting step away from the needle abuts against the stop.

9. The punching device for a mold as described in any one of claims 1 to 5, characterized in that, One of the movable block and the mold is provided with a guide post, and the other is provided with a guide hole corresponding to the position of the guide post. The guide post can extend into the guide hole and slide in cooperation with the guide hole.

10. A mold, characterized in that, The mold has a cavity for injection molding into a workpiece, and the mold has a pinhole communicating with the cavity. A punching device for the mold as described in any one of claims 1 to 9 is installed on the outside of the mold corresponding to the pinhole, and the mounting plate of the punching device is connected to the mold.

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