Injection mold with in-mold shearing function

Abstract

The present application relates to injection molding technical field, especially injection mold with in-mold shearing function, the technical problem of the present application is: the traditional injection mold needs to cut off the connecting place of plastic parts after production, which leads to poor production efficiency, and it is not convenient to lock after closing mold, which leads to unstable follow-up work, the traditional ejector pin system needs to use ejector cylinder and ejector pin parts to demould, and such design leads to complicated structure, easy to make mistakes, and poor efficiency. Injection mold with in-mold shearing function, including: outer frame with opening in side wall; two supporting blocks are respectively fixed to the bottom of the outer frame on both sides. The outer gas pump is in vacuum state by the gap, so that the injected plastic liquid can be uniformly and fully distributed in the gap, avoid the existence of bubbles affecting the quality of plastic parts, improve the injection effect, the shearing mechanism can cut the plastic parts before discharging, improve the production efficiency of plastic parts.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, and more particularly to injection molds with in-mold shearing function. Background Technology

[0002] Injection molds are used for the mass production of plastic parts. The design of injection molds is crucial, directly affecting product quality, production efficiency, and cost. Most existing injection molds use an upper and lower mold assembly for injection molding. During the injection process, the two mold assemblies are closed, and then the plastic is injected into the gap between them. After cooling and solidification, the plastic part is formed. Finally, the part is removed by mold opening and demolding. Some injection molds create a vacuum in the gap after mold closing and before injection to improve the injection effect. The molded plastic part is then demolded using an ejector system, achieving highly efficient production.

[0003] Traditional injection molds have connecting grooves on the punch and die to produce multiple plastic parts in a single injection, improving production efficiency. However, this method still requires cutting off the connecting parts after production, resulting in poor production efficiency. Furthermore, it is not convenient to lock the two molds after mold closing, leading to instability in subsequent operations. Traditional ejector systems require ejector cylinders and ejector pins for demolding, which results in a cumbersome structure, is prone to errors, and is inefficient. Summary of the Invention

[0004] To overcome the above-mentioned shortcomings, the present invention provides an injection mold with in-mold shearing function, which can shear the molded plastic parts before ejection, and can use an external vacuum pump to demold the plastic parts at the same time when the mold is opened, making the structure and operation simpler and more convenient, improving production efficiency, and locking the upper and lower modules when the mold is closed, improving the stability of plastic part production and enhancing the injection molding effect.

[0005] The technical implementation scheme of the present invention is as follows: an injection mold with in-mold shearing function, comprising:

[0006] The side wall has an open outer frame;

[0007] Two support blocks are fixed to the bottom sides of the outer frame, respectively;

[0008] The mold closing mechanism is located on the outer frame;

[0009] The upper module is mounted on the mold closing mechanism;

[0010] The lower module is mounted on the outer frame;

[0011] The shearing mechanism is located on the lower module.

[0012] Furthermore, the mold closing mechanism includes: two electric slides respectively installed on the inner sides of the top of the outer frame; a movable frame is installed on the slider of each of the two electric slides; four guide pillars respectively fixed to the bottom sides of the two movable frames, each guide pillar having a guide groove; a pressure spring is connected to both sides of the two movable frames, and the four pressure springs are respectively sleeved on the outside of the four guide pillars.

[0013] Furthermore, the upper module includes: an upper module that is slidably connected between four guide slots, with the four corners of the upper module respectively fitted onto four guide posts and connected to the bottom ends of four pressure springs, and an injection molding groove passing through the middle of the upper module; a valve is installed in the upper middle part of the upper module and communicates with the injection molding groove.

[0014] Furthermore, the lower module includes: a lower module mounted on the outer frame; a main groove connecting the upper middle part and the side part of the lower module; a threaded groove on the side of the main groove; positioning grooves at all four corners of the lower module; limit grooves 1 inside each of the four corners of the lower module; the four limit grooves 1 respectively communicating with one side of the four positioning grooves; shearing grooves on both sides of the interior of the lower module; the two shearing grooves 2 respectively communicating with the four limit grooves 1; and a one-way valve 1 mounted on the top of the main groove.

[0015] Furthermore, the shearing mechanism includes: four pressure-bearing frames that are slidably connected to four limiting grooves, the pressure-bearing ends of the pressure-bearing frames being triangular structures protruding from the limiting grooves and located in the positioning grooves; a return spring connected between each of the four pressure-bearing frames and the four limiting grooves; an extrusion frame that is fixedly connected to each of the four pressure-bearing frames and slidably connected to each of the four limiting grooves, each of the four extrusion frames having an inclined groove; and two shearing plates that are slidably connected to the two shearing grooves, the two sides of the two shearing plates being slidably connected to the four inclined grooves respectively.

[0016] Furthermore, it also includes a locking mechanism located inside the outer frame. The locking mechanism includes: two locking frames that are slidably connected to the two sides of the middle part of the outer frame; two guide frames that are fixed to the bottom of the two locking frames, and both sides of the two guide frames are provided with inclined surfaces located at the bottom of the four positioning slots; and tension springs are connected between the two guide frames and the two sides of the inner wall of the outer frame, respectively, on the side that is far apart from each other.

[0017] Furthermore, the lower module also has a ball groove, an auxiliary groove, and a second limiting groove. The ball groove is connected to the upper part of one side of the main groove; the auxiliary groove is connected to the upper part of the ball groove, and the auxiliary groove is evenly spaced and connected to the surface of the lower module in six places; the two second limiting grooves are symmetrically distributed on both sides of the main groove and are connected to the side of the lower module.

[0018] Furthermore, it also includes an ejection mechanism located between the locking frame and the lower module. The ejection mechanism includes: two toothed blocks fixed to both sides of one of the locking frames, the two toothed blocks being slidably connected to two limiting grooves; a ball valve rotatably connected to the ball groove and having a through hole, the two sides of the ball valve extending out of the ball groove and located in the two limiting grooves; two toothed columns fixed to both sides of the ball valve; and one-way valves installed at the six connecting points between the auxiliary groove and the surface of the lower module.

[0019] Furthermore, it also includes rollers, with three rollers rotatably connected to each of the two locking brackets.

[0020] The beneficial effects are as follows: 1. The present invention uses a mold-closing mechanism to close the upper and lower modules. A pressure spring applies downward pressure to the upper module, making subsequent work more stable. After the mold is closed, a gap of the required plastic part shape is formed between the upper and lower modules. An external air pump evacuates the gap to a vacuum state, and the valve is opened to inject liquid plastic into the gap, so that the injected liquid plastic can be evenly and fully distributed in the gap, avoiding the presence of air bubbles that affect the quality of the plastic part and improving the injection molding effect. The shearing mechanism can shear the plastic part formed before discharge, improving the production efficiency of plastic parts. Then, the upper mold group opens the mold with the lower mold group through the mold-closing mechanism, and finally completes the injection molding.

[0021] 2. As the guide post moves downward and passes through the positioning groove, it will press against the inclined surface of the guide frame, causing the two guide frames to move towards each other. The movement of the two locking frames will abut against the upper sides of the upper module, thereby locking the upper module to the upper part of the lower module, making injection molding and shearing more stable, improving the stability of plastic part production, and significantly enhancing the injection molding effect.

[0022] 3. During mold closing, the locking frame moves, causing the toothed block plate to move. The movement of the toothed block plate drives the ball valve to rotate via the toothed column, blocking the connection between the main groove and the auxiliary groove, preventing the high-pressure gas in the main groove from entering the auxiliary groove. During mold opening, the locking frame resets, causing the toothed block plate to reset, which in turn drives the ball valve to rotate and reset. The high-pressure gas in the main groove is ejected through the through hole, the auxiliary groove, and the one-way valve, thereby separating the plastic part from the lower module. This design can save the ejection cylinder used in traditional injection mold ejection, thereby improving the production efficiency of plastic parts. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0024] Figure 2 This is a cross-sectional three-dimensional structural diagram of the present invention.

[0025] Figure 3 This is a partial cross-sectional three-dimensional structural schematic diagram of the present invention.

[0026] Figure 4 This is a three-dimensional structural diagram of the mold closing mechanism and the upper module of the present invention.

[0027] Figure 5 This is a cross-sectional three-dimensional structural diagram of the upper module of the present invention.

[0028] Figure 6 This is a partial cross-sectional three-dimensional structural diagram of the module and guide post of the present invention.

[0029] Figure 7 This is a three-dimensional structural diagram of the disassembled module and mold closing mechanism of the present invention.

[0030] Figure 8 This is a partial three-dimensional structural schematic diagram of the present invention.

[0031] Figure 9 This is a schematic diagram of the first partial cross-sectional three-dimensional structure of the module of the present invention.

[0032] Figure 10 This is a schematic diagram of the second partial cross-sectional three-dimensional structure of the lower module of the present invention.

[0033] Figure 11 This is a partial cross-sectional three-dimensional structural diagram of the lower module and ejection mechanism of the present invention.

[0034] Figure 12 This is a partial cross-sectional three-dimensional structural diagram of the lower module and shearing mechanism of the present invention.

[0035] Figure 13 This is a second partial cross-sectional three-dimensional structural diagram of the lower module and shearing mechanism of the present invention.

[0036] Figure 14 This is a schematic diagram of the third type of cross-sectional three-dimensional structure of the lower module of the present invention.

[0037] Figure 15 This is a three-dimensional structural diagram of the shearing mechanism of the present invention.

[0038] Figure 16 This is a schematic diagram of the split three-dimensional structure of the shearing mechanism of the present invention.

[0039] Figure 17 This is a three-dimensional structural diagram of the locking mechanism, lower module, and roller of the present invention.

[0040] Figure 18 This is a three-dimensional structural diagram showing the disassembled locking mechanism and roller of the present invention.

[0041] Figure 19 This is a partial cross-sectional three-dimensional structural diagram of the lower module and ejection mechanism of the present invention.

[0042] Figure 20 This is a partial cross-sectional three-dimensional structural diagram of the lower module and the ball valve of the present invention.

[0043] Figure 21 This is a schematic diagram of the split three-dimensional structure of the ejection mechanism of the present invention.

[0044] In the attached diagram, the following labels are used: 11-outer frame, 111-opening, 12-support block, 21-electric slide, 22-moving frame, 23-guide post, 231-guide groove, 24-pressure spring, 31-upper module, 311-injection groove, 32-valve, 41-lower module, 411-main groove, 412-threaded groove, 413-ball groove, 414-auxiliary groove, 415-positioning groove, 416-limiting groove one, 417-shearing groove, 418-limiting groove two, 42-one-way valve one, 51-pressure frame, 52-reset spring, 53-extrusion frame, 531-slanted groove, 54-shearing plate, 61-locking frame, 62-guide frame, 63-tension spring, 71-toothed plate, 72-ball valve, 721-through hole, 73-toothed post, 74-one-way valve two, 8-roller. Detailed Implementation

[0045] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0046] Example 1: An injection mold with in-mold shearing function, such as Figures 1-20 As shown, it includes:

[0047] An outer frame 11 with an opening 111 is provided on the side wall;

[0048] Two support blocks 12 are welded to the bottom sides of the outer frame 11, respectively;

[0049] The mold closing mechanism is located on the outer frame 11;

[0050] The upper module, which can be injected with liquid plastic, is mounted on the mold closing mechanism, which is used to move the upper module.

[0051] The lower module, which can extract the air from the gap after the mold is closed, is located on the outer frame 11.

[0052] The shearing mechanism, located on the lower module, is used to remove excess material from the joints of the molded plastic parts.

[0053] The upper mold assembly is closed with the lower mold assembly via a mold closing mechanism. After the mold closure, a gap is formed between the upper and lower mold assemblies to form the desired shape of the plastic part. The lower mold assembly removes the air from the gap, and the upper mold assembly injects liquid plastic into the gap. After the liquid plastic cools and solidifies, the shearing mechanism cuts the solidified plastic part. Then, the upper mold assembly is opened with the lower mold assembly via the mold closing mechanism, thus completing the injection molding process.

[0054] The mold closing mechanism includes: two electric slides 21 respectively installed on the inner sides of the top of the outer frame 11, the two electric slides 21 being symmetrically distributed; a movable frame 22 is installed on the slider of each of the two electric slides 21; four guide pillars 23 respectively welded to the bottom sides of the two movable frames 22, each guide pillar 23 having a guide groove 231; a pressure spring 24 is connected to both sides of the two movable frames 22, and the four pressure springs 24 are respectively sleeved on the outside of the four guide pillars 23.

[0055] The upper module includes: an upper module 31 that is slidably connected between four guide grooves 231; the four corners of the upper module 31 are respectively fitted onto four guide posts 23 and respectively connected to the bottom ends of four pressure springs 24; an injection groove 311 passes through the middle of the upper module 31; and a valve 32 is installed in the upper middle part of the upper module 31 and communicates with the injection groove 311.

[0056] Initially, the liquid plastic is connected to the valve 32 via a hose. The slider of the electric slide table 21 drives the moving frame 22 and guide post 23 to move the upper mold assembly. The pressure spring 24 can apply pressure to the upper mold assembly after the mold is closed. When it is necessary to inject the liquid plastic, the valve 32 can be opened to allow the liquid plastic to enter the gap formed between the upper and lower mold assemblies through the injection tank 311.

[0057] The lower module includes: a lower module 41 mounted on the outer frame 11 and located directly below the upper module 31; a main groove 411 connecting the upper middle and side of the lower module 41; a threaded groove 412 on the side of the main groove 411; positioning grooves 415 at the four corners of the lower module 41 and directly below the four guide posts 23, allowing the guide posts 23 to be precisely inserted into the positioning grooves 415; limiting grooves 416 inside the four corners of the lower module 41, with each limiting groove 416 communicating with one side of the four positioning grooves 415; shearing grooves 417 on both sides inside the lower module 41, with each shearing groove 417 communicating with one side of each of the four limiting grooves 416; and a one-way valve 42 mounted on the top of the main groove 411.

[0058] An external air pump is connected to the threaded groove 412 via a hose and opening 111. After the mold is closed, the external air pump draws a vacuum into the gap between the upper and lower molds through the main groove 411 and the one-way valve 42. Then, the external air pump fills the main groove 411 with gas to block the outlet of the one-way valve 42, so that the injected plastic liquid can be evenly distributed in the gap and is not easy to flow out through the one-way valve 42.

[0059] The shearing mechanism includes: four pressure-bearing frames 51 that are slidably connected to four limiting grooves 416 respectively. The pressure-bearing ends of the pressure-bearing frames 51 are triangular structures that protrude from the limiting grooves 416 and are located in the positioning grooves 415. The guide post 23 can press the pressure-bearing frames 51 to move, and the pressure-bearing frames 51 can enter the guide grooves 231. The four pressure-bearing frames 51 are respectively connected to the four limiting grooves 416 with return springs 52. The four pressure-bearing frames 53 are respectively welded to the four pressure-bearing frames 51 and slidably connected to the four limiting grooves 416 respectively. Each of the four extrusion frames 53 has an inclined groove 531. The two shearing plates 54 are slidably connected to the two shearing grooves 417 respectively. The two sides of the two shearing plates 54 are slidably connected to the four inclined grooves 531 respectively.

[0060] The guide post 23 moves downward to enter the positioning groove 415 to compress the pressure frame 51. Then the guide post 23 continues to move, and the pressure frame 51 enters the guide groove 231. When the guide post 23 moves upward, it compresses the pressure frame 51, causing the extrusion frame 53 to move. The inclined groove 531 compresses the shearing plate 54 to move upward to remove the excess part at the joint of the molded plastic part, thereby improving the production efficiency of the plastic part.

[0061] Initially, valve 32 is closed. First, the operator connects the liquid plastic to valve 32 via a hose, and simultaneously connects an external air pump to threaded groove 412 via a hose and opening 111. When mold closing is required, the operator controls the slider of electric slide table 21 to drive moving frame 22 and guide post 23, causing the upper mold assembly to move downwards. As the guide post 23 moves downwards, it passes under positioning groove 415. The upper module 31 moves downwards and contacts the lower module 41 to close the mold. After mold closing, a gap is formed between the upper module 31 and the lower module 41 to form the desired shape of the plastic part. Moving frame 22 continues to move downwards to compress the plastic. The pressure spring 24 applies downward pressure to the upper module 31, stabilizing subsequent operations and thus completing mold closing. When molten plastic needs to be injected, the operator first controls an external air pump to create a vacuum between the upper and lower modules 31 through the main tank 411 and one-way valve 42. Then, the operator controls the external air pump to fill the main tank 411 with gas to block the outlet of one-way valve 42, preventing the injected molten plastic from flowing out through one-way valve 42. Simultaneously, valve 32 is opened, and the vacuum gap between the upper and lower modules 31 draws the molten plastic into the injection tank 311 to complete the process. Injection, this operation ensures that the injected molten plastic is evenly and fully distributed within the gaps, preventing air bubbles from affecting the quality of the plastic parts and improving the injection molding effect. During mold closing, the guide post 23 moves downward, first squeezing the pressure frame 51, compressing the return spring 52. Then, the guide post 23 continues to move downward, and the return spring 52 returns, causing the pressure frame 51 to return and enter the guide groove 231. After the molten plastic cools and forms the plastic part, the operator controls the slider of the electric slide table 21 to return, causing the moving frame 22 and guide post 23 to return the upper mold assembly upward. During this process, the pressure spring 24 will first... The reset mechanism causes the upper module 31 to remain on the lower module 41 for a period of time. When the guide post 23 moves upward, it first squeezes the pressure frame 51 to move, and the compression spring is squeezed again. The movement of the pressure frame 51 drives the extrusion frame 53 to move, causing the inclined groove 531 to squeeze the shearing plate 54 to move upward and cut off the excess part at the connection of the molded plastic part. Then the guide post 23 disengages from the positioning groove 415 and no longer squeezes the pressure frame 51. The shearing mechanism resets. This allows the plastic part to be sheared before discharge, thereby improving the production efficiency of the plastic part. After the mold is opened, the workers can take out the molded plastic part and the cut-off excess part.

[0062] Example 2: Based on Example 1, such as Figures 1-3 , Figure 8 and Figures 17-19As shown, it also includes a locking mechanism for locking the upper module 31 after mold closing. It is located inside the outer frame 11. The locking mechanism includes: two locking frames 61 that are slidably connected to the two sides of the middle part of the outer frame 11; two guide frames 62 that are welded to the bottom of the two locking frames 61 respectively. Both sides of the two guide frames 62 are provided with inclined surfaces located at the lower part of the four positioning grooves 415; tension springs 63 are connected between the two guide frames 62 and the two sides of the inner wall of the outer frame 11 respectively.

[0063] As the guide post 23 moves downward and passes through the positioning groove 415, it will press against the inclined surface of the guide frame 62, causing the two guide frames 62 to drive the two locking frames 61 to move closer to each other. The movement of the two locking frames 61 will abut against the upper sides of the upper module 31 respectively, thereby locking the upper module 31 to the upper part of the lower module 41, making the injection molding and shearing more stable.

[0064] It also includes rollers 8. Three rollers 8 are rotatably connected to each of the two locking brackets 61. The rollers 8 can effectively reduce wear when locking the upper module 31.

[0065] During the mold closing process, the guide post 23 has completed the mold closing when it passes through the positioning groove 415. When the guide post 23 moves downward and passes through the positioning groove 415, it will squeeze the inclined surface of the guide frame 62, causing the two guide frames 62 to move towards each other. This, in turn, drives the two locking frames 61 to move towards each other, and the tension spring 63 is stretched. The movement of the two locking frames 61 will respectively abut against the upper sides of the upper module 31 through the roller 8. Under the action of the roller 8, the wear on the upper module 31 during locking can be effectively reduced. At the same time, the upper module 31 can be firmly locked to the upper part of the lower module 41, making the subsequent injection of plastic liquid and cutting of plastic parts more stable, improving the stability of plastic part production, and significantly enhancing the injection molding effect. During the mold opening process, the guide post 23 returns to its original position and no longer squeezes the inclined surface of the guide frame 62. The tension spring 63 returns to its original position and drives the guide frame 62, locking frame 61 and roller 8 to return to their original position and no longer lock the upper module 31.

[0066] Example 3: Based on Example 2, such as Figures 1-3 , Figures 8-14 and Figures 19-21 As shown, the lower module 41 also has a ball groove 413, an auxiliary groove 414, and a second limiting groove 418. The ball groove 413 is connected to the upper part of one side of the main groove 411; the auxiliary groove 414 is connected to the upper part of the ball groove 413, and the auxiliary groove 414 is evenly spaced and connected to the surface of the lower module 41 in six places; the two second limiting grooves 418 are symmetrically distributed on both sides of the main groove 411 and are connected to the side of the lower module 41.

[0067] It also includes an ejection mechanism, used to separate the molded plastic part from the lower module 41 by air pressure during mold opening. It is located between the locking frame 61 and the lower module 41. The ejection mechanism includes: two toothed plates 71 respectively welded to both sides of one of the locking frames 61, and the two toothed plates 71 are slidably connected to two limiting grooves 418 respectively; a ball valve 72 rotatably connected in the ball groove 413 and having a through hole 721, the two sides of the ball valve 72 protruding from the ball groove 413 and located in the two limiting grooves 418 respectively, and the through hole 721 connecting the main groove 411 and the auxiliary groove 414; two toothed columns 73 respectively connected to both sides of the ball valve 72 by keyways, and the two toothed plates 71 mesh with the two toothed columns 73 respectively; and one-way valves 74 are installed at the six connecting points between the auxiliary groove 414 and the surface of the lower module 41.

[0068] During the mold closing process, the locking frame 61 moves, causing the toothed block plate 71 to move. The movement of the toothed block plate 71 drives the ball valve 72 to rotate via the toothed column 73, blocking the connection between the main groove 411 and the auxiliary groove 414, preventing the high-pressure gas in the main groove 411 from entering the auxiliary groove 414. During the mold opening process, the locking frame 61 resets, causing the toothed block plate 71 to reset, which in turn drives the ball valve 72 to rotate and reset via the toothed column 73. The high-pressure gas in the main groove 411 is ejected through the through hole 721, the auxiliary groove 414, and the one-way valve 74, thereby separating the plastic part from the lower module 41 and improving the production efficiency of the plastic part.

[0069] When locking the upper module 31, the movement of one of the locking brackets 61 will cause the two toothed plates 71 to move together towards the interior of the lower module 41. The toothed plates 71 will first engage with the toothed column 73, and then the continued movement of the toothed plates 71 will drive the ball valve 72 to rotate through the toothed column 73, thereby blocking the connection between the main tank 411 and the auxiliary tank 414. This prevents the high-pressure gas in the main tank 411 from entering the auxiliary tank 414 when the external air pump fills the main tank 411. Furthermore, under the action of the six one-way valves 74, the injected plastic liquid is not... The gas enters the auxiliary groove 414. During the mold opening process, the locking frame 61 resets and drives the two toothed blocks 71 to reset. Through the toothed column 73, the ball valve 72 rotates and resets. At this time, the high-pressure gas in the main groove 411 will be ejected through the through hole 721, the auxiliary groove 414 and the one-way valve 74 in sequence. The ejected gas will separate the plastic part from the lower module 41 and then eject the plastic part from the lower module 41. Through this design, the ejection cylinder used in traditional injection mold ejection can be saved, thereby improving the production efficiency of plastic parts.

[0070] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection mold with in-mold shearing function, characterized in that: include: An outer frame (11) with an opening (111) is provided on the side wall; Two support blocks (12) are fixed to the bottom sides of the outer frame (11), respectively; The mold closing mechanism is located on the outer frame (11); The upper module is mounted on the mold closing mechanism; The lower module is mounted on the outer frame (11); The shearing mechanism is located on the lower module; The mold closing mechanism includes: two electric slides (21) respectively installed on the inner sides of the top of the outer frame (11); a movable frame (22) is installed on the slider of each of the two electric slides (21); four guide pillars (23) respectively fixed to the bottom sides of the two movable frames (22), each guide pillar (23) having a guide groove (231); a pressure spring (24) is connected to both sides of the two movable frames (22), and the four pressure springs (24) are respectively sleeved on the outside of the four guide pillars (23); The upper module includes: an upper module (31) that is slidably connected between four guide grooves (231), with the four corners of the upper module (31) respectively fitted onto four guide posts (23) and respectively connected to the bottom ends of four pressure springs (24), and an injection groove (311) passing through the middle of the upper module (31); a valve (32) connected to the injection groove (311) is installed in the upper middle part of the upper module (31). The lower module includes: a lower module (41) installed on the outer frame (11), a main groove (411) connecting the upper middle part and the side part of the lower module (41), a threaded groove (412) opened on the side of the main groove (411), positioning grooves (415) opened at the four corners of the lower module (41), a limit groove (416) opened inside the four corners of the lower module (41), the four limit grooves (416) are respectively connected to one side of the four positioning grooves (415), shearing grooves (417) are opened on both sides of the interior of the lower module (41), the two shearing grooves (417) are respectively connected to the four limit grooves (416) on both sides; and a one-way valve (42) installed on the top of the main groove (411).

2. The injection mold with in-mold shearing function according to claim 1, characterized in that: The shearing mechanism includes: four pressure-bearing frames (51) that are slidably connected to four limiting grooves (416), the pressure-bearing ends of the pressure-bearing frames (51) being triangular and exposed in the limiting grooves (416) and located in the positioning grooves (415); a return spring (52) is connected between the four pressure-bearing frames (51) and the four limiting grooves (416); an extrusion frame (53) that is fixed to the four pressure-bearing frames (51) and slidably connected to the four limiting grooves (416), and a slanted groove (531) is opened on each of the four extrusion frames (53); and two shearing plates (54) that are slidably connected to the two shearing grooves (417), the two sides of the two shearing plates (54) being slidably connected to the four slanted grooves (531).

3. The injection mold with in-mold shearing function according to claim 2, characterized in that: It also includes a locking mechanism located inside the outer frame (11). The locking mechanism includes: two locking frames (61) that are slidably connected to the two sides of the middle part of the outer frame (11); two guide frames (62) that are fixed to the bottom of the two locking frames (61); both sides of the two guide frames (62) are provided with inclined surfaces located at the bottom of the four positioning grooves (415); and tension springs (63) are connected between the two guide frames (62) that are far apart from each other and the two sides of the inner wall of the outer frame (11).

4. The injection mold with in-mold shearing function according to claim 3, characterized in that: The lower module (41) also has a ball groove (413), an auxiliary groove (414) and a second limiting groove (418). The ball groove (413) is connected to the upper part of one side of the main groove (411); the auxiliary groove (414) is connected to the upper part of the ball groove (413), and the auxiliary groove (414) is evenly connected to the surface of the lower module (41) in six places; the two second limiting grooves (418) are symmetrically distributed on both sides of the main groove (411) and are connected to the side of the lower module (41).

5. The injection mold with in-mold shearing function according to claim 4, characterized in that: It also includes an ejection mechanism, located between the locking frame (61) and the lower module (41). The ejection mechanism includes: two toothed plates (71) respectively fixed to both sides of one of the locking frames (61), the two toothed plates (71) being slidably connected to two limiting grooves (418); a ball valve (72) rotatably connected to the ball groove (413) and having a through hole (721), the two sides of the ball valve (72) extending out of the ball groove (413) and located in the two limiting grooves (418); two toothed columns (73) respectively fixed to both sides of the ball valve (72); and one-way valves (74) installed at the six connecting points between the auxiliary groove (414) and the surface of the lower module (41).

6. The injection mold with in-mold shearing function according to claim 5, characterized in that: It also includes rollers (8), and three rollers (8) are rotatably connected to both locking frames (61).

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