CN116160627A

CN116160627A - Injection molding die

Info

Publication number: CN116160627A
Application number: CN202310425632.1A
Authority: CN
Inventors: 杜硕殷; 杜少友; 陈森悦
Original assignee: Shantou Chenghai Kaiyi Toy Co ltd
Current assignee: Shantou Chenghai Kaiyi Toy Co ltd
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-05-26
Anticipated expiration: 2043-04-20
Also published as: CN116160627B

Abstract

The invention belongs to the technical field of injection molds, and particularly relates to an injection molding mold, which comprises a C-shaped frame, wherein a driving mechanism matched with a movable mold is assembled on the C-shaped frame, sealing blocks are assembled in two sleeves in a sliding manner, a first spring sleeved on the surface of a sliding rod is arranged on the left side of each sealing block, a limiting mechanism is assembled between the end part of the sliding rod and each sealing block, a first magnet block is fixedly connected to the upper side of each second spring, an installation groove is arranged on one side of each sealing block, which faces the sliding rod, an unlocking mechanism matched with the two first magnets blocks is arranged between the two sleeves, a first water inlet pipe and a first water outlet pipe are respectively arranged on one side of each sleeve on the upper side, which is close to the C-shaped frame, of each sleeve, and a pressure mechanism communicated with a molding cavity is assembled at the end part of each first water inlet pipe and each second water outlet pipe.

Description

Injection molding die

Technical Field

The invention belongs to the technical field of injection molds, and particularly relates to an injection molding mold.

Background

Injection molding is also called injection molding, which is a molding method of injection and molding, wherein molten plastic material is injected into a molding cavity in a mold, after plastic entering the molding cavity is cooled, the plastic is formed into a required plastic shape according to the shape of the molding cavity, so that the injection mold is deeply favored by plastic toy processing factories or some plastic part processing factories, a transfer mold and a fixed mold of the injection mold are buckled with the fixed mold under the action of a driving mechanism, the middle parts of the movable mold and the fixed mold form the molding cavity, a plurality of exhaust grooves communicated with the molding cavity are further arranged on the upper side of the inner part of the injection mold, the exhaust grooves can keep the air pressure balance in the molding cavity, the exhaust grooves can enable the molding cavity to be communicated with external air, the plastic can be fully filled into the molding cavity, and the gap between the exhaust grooves is smaller than the plastic overflow value when the mold is designed, so that no material enters into exhaust holes in the processing;

in order to ensure that plastics can be conveniently taken out from a forming cavity after the plastic is formed in the working process of the injection mold, the surface of the forming cavity is required to be sprayed with a release agent, however, some injection molds with complex forming cavity shapes, such as injection molds of plastic particle building block toys, are complex in forming cavity inner wall shape, and cannot be uniformly sprayed on all inner walls of the forming cavity when the release agent is sprayed, parts with complex shapes are required to be manually cleaned by a brush or wiping cloth, so that the working efficiency is seriously influenced, and meanwhile, the plastic cannot be easily demoulded in places where the release agent is not uniformly sprayed, so that the plastic is damaged.

Disclosure of Invention

The purpose of the invention is that: aims to provide an injection molding die which is used for solving the problems existing in the background technology.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

the injection molding mold comprises a C-shaped frame, wherein a fixed mold is assembled on one side of the C-shaped frame, a movable mold is assembled on the other side of the C-shaped frame, a driving mechanism matched with the movable mold is assembled on the C-shaped frame, a molding cavity is assembled on one side of the fixed mold opposite to the movable mold, sleeves are symmetrically arranged on the side face of the C-shaped frame up and down, sealing blocks are slidably assembled in the two sleeves, sliding rods are arranged on the upper side and the lower side of the movable mold, a first spring sleeved on the surface of the sliding rods is arranged on the left side of each sealing block, the two sliding rods respectively slide into the two sleeves, a limiting mechanism is assembled between the end part of each sliding rod and each sealing block, each limiting mechanism comprises a step hole arranged in each sliding rod, a second spring is assembled in each step hole, a first magnet block is fixedly connected to the upper side of each second spring, an arc-shaped locking block is fixedly connected to the upper side of each first magnet block, the sealing block is provided with a mounting groove facing to one side of the sliding rod, the upper side of the mounting groove is provided with a lock hole matched with the arc-shaped locking block, an unlocking mechanism matched with the two first magnet blocks is arranged between the two sleeves, one side of the sleeve on the upper side, which is far away from the C-shaped frame, is provided with a vent hole, one side of the sleeve on the upper side, which is near to the C-shaped frame, is respectively provided with a first water inlet pipe and a first water outlet pipe, the first water inlet pipe and the first water outlet pipe are respectively provided with a first water inlet check valve and a first water outlet check valve, one side of the sleeve on the lower side, which is far away from the C-shaped frame, is respectively communicated with a second water inlet pipe and a second water outlet pipe, the second water inlet pipe and the second water outlet pipe are respectively provided with a second water inlet check valve and a second water outlet check valve, the end parts of the first water inlet pipe and the second water outlet pipe are jointly provided with a pressure mechanism communicated with the forming cavity, the side of the C-shaped frame is provided with a storage mechanism matched with the first water outlet pipe and the second water inlet pipe.

The unlocking mechanism comprises a mounting plate, a second magnet block which is repulsed with a first magnet block is assembled on one side, close to the C-shaped frame, of the lower surface of the mounting plate, a sliding groove is formed in the upper side of the mounting plate, a third magnet block which is repulsed with the first magnet block is assembled in the sliding groove in a sliding manner, a rebound component which is matched with the third magnet block is arranged in the sliding groove, a sliding hole is formed in one side, far away from the C-shaped frame, of the lower surface of the mounting plate, a fourth magnet block which is repulsed with the first magnet block is arranged in the sliding hole, an iron block which is repulsed with the fourth magnet block is arranged on the upper surface of the sealing block on the lower side, the attractive force between the iron block and the first magnet block is smaller than the repulsive force between the second magnet block and the first magnet block, a third spring is assembled on the lower side of the fourth magnet block, and a linkage component is assembled between the fourth magnet block and the third magnet block.

The rebound assembly comprises a limiting rod arranged in the chute, the third magnet block is sleeved on the outer surface of the limiting rod, and a fourth spring abutted against the third magnet block is sleeved on the right side of the limiting rod.

The linkage assembly comprises a connecting hole communicated with the sliding hole and the sliding groove, a connecting wire is assembled in the connecting hole, and two ends of the connecting wire are fixedly connected with the third magnet block and the fourth magnet block respectively.

The pressure mechanism comprises a cavity arranged at the lower side of a movable die, grooves are formed in the inner walls of the left side and the right side of the cavity, fixing rods are arranged in the grooves, connecting rods are sleeved on the fixing rods in a sliding mode, a fifth spring is sleeved on the outer surface of the upper side of each fixing rod, the upper end and the lower end of each fifth spring are respectively fixedly connected with the inner wall of the upper side of the corresponding groove and the connecting rod, supporting rods are arranged on the upper side of each connecting rod, communicating holes communicated with the cavities are formed in the inner wall of the lower side of each forming cavity, sealing blocks matched with the communicating holes are arranged on the upper side of each supporting rod, and each first water inlet pipe and each second water outlet pipe are communicated with the corresponding cavity.

The storage mechanism comprises a storage frame arranged on the outer side of the C-shaped frame, and the lower ends of the first water outlet pipe and the second water inlet pipe extend into the storage frame.

The four corners of the fixed die are provided with positioning holes, the four corners of one side of the movable die, which is opposite to the fixed die, are provided with positioning rods, and the four positioning rods are respectively matched with the four positioning holes.

The driving mechanism comprises two hydraulic rods fixedly connected with the C-shaped frame, and an output shaft of the hydraulic rods penetrates through the C-shaped frame to be fixedly connected with the movable die.

The invention has simple structure and wonderful design, can quickly fill the release agent into the molding cavity before injection molding after the movable die is buckled with the fixed die without additionally adding electric equipment, reduces the labor burden while improving the release effect, can quickly extract the release agent in the molding cavity after filling the molding cavity, does not depend on electric equipment in the whole process, and is ingenious and reasonable by means of mutual matching of mechanical structures.

Drawings

The invention may be further illustrated by means of non-limiting examples given in the accompanying drawings.

FIG. 1 is a schematic diagram of a front structure of an injection mold according to an embodiment of the present invention;

FIG. 2 is a schematic side view of an embodiment of an injection mold according to the present invention;

FIG. 3 is a schematic view of another embodiment of an injection mold according to the present invention;

FIG. 4 is a schematic cross-sectional view of an embodiment of an injection mold according to the present invention;

FIG. 5 is an enlarged schematic view of the structure shown at A in FIG. 4;

FIG. 6 is an enlarged schematic view of the structure shown at B in FIG. 4;

FIG. 7 is an enlarged schematic view of FIG. 4 at C;

fig. 8 is a schematic cross-sectional view of a movable mold of an injection mold according to an embodiment of the present invention.

The main reference numerals are as follows:

the C-shaped frame 1, the fixed mold 11, the movable mold 12, the forming cavity 13, the sleeve 14, the sealing block 2, the slide rod 21, the first spring 211, the step hole 22, the second spring 23, the first magnet block 24, the arc-shaped locking block 25, the mounting groove 26, the lock hole 27, the vent hole 3, the first water inlet pipe 31, the first water outlet pipe 32, the first water inlet check valve 33, the first water outlet check valve 34, the second water inlet pipe 35, the second water outlet pipe 351, the second water inlet check valve 36, the second water outlet check valve 37, the mounting plate 4, the second magnet block 41, the slide groove 42, the third magnet block 43, the slide hole 44, the fourth magnet block 45, the magnet block 451, the third spring 46, the limit rod 47, the fourth spring 48, the connecting hole 49, the connecting wire 491, the cavity 5, the groove 51, the fixing rod 52, the connecting rod 53, the fifth spring 54, the support rod 55, the communication hole 56, the seal block 57, the storage frame 6, the positioning hole 61, the positioning rod 62, and the hydraulic rod 63.

Detailed Description

In order that those skilled in the art will better understand the present invention, the following technical scheme of the present invention will be further described with reference to the accompanying drawings and examples.

As shown in fig. 1 to 8, an injection molding mold of the present invention comprises a C-shaped frame 1, a fixed mold 11 is assembled on one side of the C-shaped frame 1, a movable mold 12 is assembled on the other side of the C-shaped frame 1, a driving mechanism matched with the movable mold 12 is assembled on the C-shaped frame 1, a molding cavity 13 is assembled on the opposite side of the fixed mold 11 and the movable mold 12, sleeves 14 are symmetrically arranged on the side surface of the C-shaped frame 1, a sealing block 2 is assembled in each of the two sleeves 14 in a sliding manner, sliding rods 21 are respectively arranged on the upper side and the lower side of the movable mold 12, a first spring 211 sleeved on the surface of the sliding rod 21 is arranged on the left side of the sealing block 2, the two sliding rods 21 respectively extend into the two sleeves 14 in a sliding manner, a limiting mechanism is assembled between the end part of the sliding rod 21 and the sealing block 2, the limiting mechanism comprises a step hole 22 arranged in the sliding rod 21, a second spring 23 is assembled in the step hole 22, a first magnet 24 is fixedly connected on the upper side of the second spring 23, the upper side of the first magnet block 24 is fixedly connected with an arc-shaped locking block 25, one side of the sealing block 2 facing the sliding rod 21 is provided with a mounting groove 26, the upper side of the mounting groove 26 is provided with a locking hole 27 matched with the arc-shaped locking block 25, an unlocking mechanism matched with the two first magnet blocks 24 is arranged between the two sleeves 14, one side of the upper sleeve 14 far away from the C-shaped frame 1 is provided with a vent hole 3, one side of the upper sleeve 14 near the C-shaped frame 1 is respectively provided with a first water inlet pipe 31 and a first water outlet pipe 32, the first water inlet pipe 31 and the first water outlet pipe 32 are respectively provided with a first water inlet check valve 33 and a first water outlet check valve 34, one side of the lower sleeve 14 far away from the C-shaped frame 1 is respectively communicated with a second water inlet pipe 35 and a second water outlet pipe 351, the second water inlet pipe 35 and the second water outlet pipe 351 are respectively provided with a second water inlet check valve 36 and a second water outlet check valve 37, the ends of the first water inlet pipe 31 and the second water outlet pipe 351 are jointly provided with a pressure mechanism communicated with the forming cavity 13, and the side surface of the C-shaped frame 1 is provided with a storage mechanism matched with the first water outlet pipe 32 and the second water inlet pipe 35.

The mold release agent can be put into the storage mechanism, when injection molding is not performed, the movable mold 12 and the fixed mold 11 are mutually separated and are respectively positioned at the left side and the right side of the C-shaped frame 1, when injection molding is required, under the action of the driving mechanism, the movable mold 12 is driven to move towards the fixed mold 11 side, the movable mold 12 drives the two slide bars 21 to move towards the fixed mold 11 side, the two slide bars 21 respectively drive the two sealing blocks 2 to move towards the side close to the C-shaped frame 1 in the sleeve 14, the first spring 211 starts to compress, the sealing blocks 2 in the sleeve 14 at the lower side form negative pressure at the right side in the sleeve 14 at the lower side when moving towards the C-shaped frame 1 side, so that the mold release agent in the storage mechanism is sucked into the sleeve 14 at the lower side through the second water inlet pipe 35, after the movable mold 12 and the fixed mold 11 are completely buckled, the molding cavities 13 of the movable mold 12 and the fixed mold 11 are buckled together, at this time, the unlocking mechanism acts on the limiting mechanism in the lower sleeve 14 to drive the first magnet block 24 in the lower slide rod 21 to move downwards in the step hole 22, the second spring 23 compresses until the first magnet block 24 drives the arc-shaped locking block 25 to move downwards to move out of the lock hole 27, the limiting between the lower slide rod 21 and the sealing block 2 is canceled at this time, so that under the action of the extension of the first spring 211, the sealing block 2 in the lower sleeve 14 moves rapidly to the right, the release agent in the lower sleeve 14 is flushed into the pressure mechanism through the second water outlet pipe 351 to overcome the pressure in the pressure mechanism, the cavity 13 is filled fully, after the sealing block 2 in the lower sleeve 14 is positioned at the rightmost end, the unlocking mechanism cancels the limiting of the sealing block 2 in the upper sleeve 14, and similarly, the first magnet block 24 in the step hole 22 of the upper slide rod 21 moves downwards, the second spring 23 compresses, the arc-shaped locking piece 25 is retracted into the step hole 22 and moves out of the locking hole 27 so as to release the limit of the sealing piece 21, then the first spring 211 stretches to drive the sealing piece 2 to move rightwards quickly, negative pressure is formed in the left side of the upper sleeve 14 at the moment, suction force is transmitted to the pressure mechanism through the first water inlet pipe 31, the action of the pressure mechanism is overcome, the release agent in the forming cavity 13 is sucked into the upper sleeve 14 through the first water inlet pipe 31, the release agent is filled in the forming cavity 13 quickly through the design, then the release agent in the forming cavity 13 is discharged quickly, each corner of the forming cavity 13 can be guaranteed to be fully paved with the release agent, the burden of manual spraying of the release agent is reduced, the release efficiency is increased, the manual burden is reduced, and after the release agent is sucked into the upper sleeve 14, plastics can be injected into the forming cavity 13 for injection molding;

after injection molding, the movable mold 12 is separated from the fixed mold 11 under the action of the driving mechanism, the molded plastic part can be taken out after the molding cavity 13 is exposed, the movable mold 12 drives the two slide bars 21 to move rightwards in the sleeve 14 until the end parts of the slide bars 21 extend into the mounting grooves 26 of the sealing blocks 2, the inner walls of the mounting grooves 26 squeeze the upper side inner walls of the arc-shaped locking pieces 25 to drive the arc-shaped locking pieces 25 to move downwards into the stepped holes 22 in the process of extending the slide bars 21 into the mounting grooves 26, the second springs 23 compress, after the end surfaces of the slide bars 21 contact the inner walls of the mounting grooves 26, the first magnet blocks 24 are driven to move upwards under the action of the extension of the second springs 23, so that the arc-shaped locking pieces 25 are driven to extend into the locking holes 27, the connection between the slide bars 21 and the sealing blocks 2 can be effectively realized, the next work is facilitated, and when the slide bars 21 drive the sealing blocks 2 in the upper side sleeve 14 to move leftwards next time, the release agent is sprayed out through the first water outlet pipe 32 and sprayed into the storage mechanism.

The unlocking mechanism comprises a mounting plate 4, a second magnet 41 which is repulsed with a first magnet 24 is arranged on the lower surface of the mounting plate 4 near one side of the C-shaped frame 1, a sliding groove 42 is arranged on the upper side of the mounting plate 4, a third magnet 43 which is repulsed with the first magnet 24 is arranged in the sliding groove 42 in a sliding manner, a rebound component matched with the third magnet 43 is arranged in the sliding groove 42, a sliding hole 44 is arranged on the lower surface of the mounting plate 4 far away from one side of the C-shaped frame 1, a fourth magnet 45 which is repulsed with the first magnet 24 is arranged in the sliding hole 44, a magnet 451 which is repulsed with the fourth magnet 45 is arranged on the upper surface of the sealing block 2 on the lower side, the attractive force between the magnet 451 and the first magnet 24 is smaller than the repulsed force between the second magnet 41 and the first magnet 24, a third spring 46 is arranged on the lower side of the fourth magnet 45, and a linkage component is arranged between the fourth magnet 45 and the third magnet 43.

After the sealing block 2 in the lower sleeve 14 is positioned at the leftmost position of the lower sleeve 14, the second magnet block 41 and the first magnet block 24 repel, so that the attraction of the second magnet block 41 to the magnet block 451 is overcome, the first magnet block 24 at the lower side is driven to move away from one side, the first magnet block 24 is driven to move downwards in the stepped hole 22, the second spring 23 is compressed, the arc-shaped locking block 25 is moved out of the locking hole 27, then the connection between the sliding rod 21 and the sealing block 2 can be effectively canceled, then the sealing block 2 in the lower sleeve 14 moves to the right side of the sleeve 14 quickly, the iron block 451 at the lower side is adsorbed to the fourth magnet block 45 after the sealing block 2 at the lower side of the sleeve 14 moves to the right limit position, and the fourth magnet block 45 is driven to move downwards, the third spring 46 starts to compress, the third magnet 43 is driven to move in the sliding groove 42 through the linkage assembly until the position of the third magnet 43 is matched with that of the upper first magnet 24, the third magnet 43 drives the upper first magnet 24 to move downwards, the upper first magnet 24 moves downwards, the arc-shaped locking piece 25 is driven to move downwards to move out of the locking hole 27, the upper sealing block 2 is disconnected with the sliding rod 21, the upper sealing block 2 is driven to move rightwards in the sleeve 14 under the action of the extension of the first spring 211, and the limit of the upper sealing block 2 is automatically released after only the sealing block in the lower sleeve 14 slides rightwards to the limit position in the design.

The rebound assembly comprises a limiting rod 47 arranged in the chute 42, a third magnet block 43 is sleeved on the outer surface of the limiting rod 47, and a fourth spring 48 which is abutted against the third magnet block 43 is sleeved on the right side of the limiting rod 47.

When the third magnet block 43 moves rightwards under the action of the linkage assembly, the fourth spring 48 is compressed, and after the linkage mechanism is not pulled, the third magnet block 43 is driven to reset under the action of the extension of the fourth spring 48.

The linkage assembly comprises a connecting hole 49 communicated with the sliding hole 44 and the sliding groove 42, a connecting wire 491 is assembled in the connecting hole 49, and two ends of the connecting wire 491 are fixedly connected with the third magnet block 43 and the fourth magnet block 45 respectively. When the fourth magnet 45 moves downward, the third magnet 43 is driven to move by the connecting wire 491.

The pressure mechanism comprises a cavity 5 arranged at the lower side of a movable die 12, grooves 51 are formed in the inner walls of the left side and the right side of the cavity 5, fixed rods 52 are arranged in the two grooves 51, connecting rods 53 are sleeved on the two fixed rods 52 in a sliding mode, fifth springs 54 are sleeved on the outer surfaces of the upper sides of the two fixed rods 52, the upper end and the lower end of each fifth spring 54 are fixedly connected with the inner wall of the upper side of the corresponding groove 51 and the connecting rod 53 respectively, supporting rods 55 are arranged on the upper side of each connecting rod 53, communication holes 56 communicated with the cavity 5 are formed in the inner wall of the lower side of a forming cavity 13, sealing blocks 57 matched with the communication holes 56 are arranged on the upper side of the supporting rods 55, and the first water inlet pipe 31 and the second water outlet pipe 351 are communicated with the cavity 5.

After the first water outlet pipe 32 injects the release agent into the cavity 5, the pressure in the cavity 5 is gradually increased to drive the sealing block 57 to move upwards, the fifth spring 54 compresses, after the sealing block 57 moves out of the communication hole 56, the release agent enters the forming cavity 13 from the communication hole 56, after the release agent stops being injected into the cavity 5, the sealing block 57 is driven to reset through the connecting rod 53 and the supporting rod 55 under the action of stretching of the fifth spring 54, the sealing block 57 is positioned in the communication hole 56 to be sealed, when the second water inlet pipe 35 generates the suction force, the suction force is transmitted into the cavity 5 to drive the sealing block 57 to move downwards to be retracted into the cavity 5, the fifth spring 54 starts to stretch, at the moment, the release agent in the forming cavity 13 is sucked into the cavity 5 downwards, then is sucked into the sleeve 14 on the upper side through the second water inlet pipe 35, and after the suction force is not generated, the sealing block 57 is driven to reset under the action of compressing of the fifth spring 54.

The storage mechanism comprises a storage frame 6 arranged outside the C-shaped frame 1, and the lower ends of the first water outlet pipe 32 and the second water inlet pipe 35 extend into the storage frame 6. The storage frame 6 is used for storing a release agent.

Four corners of the fixed die 11 are provided with positioning holes 61, four corners of the side, opposite to the fixed die 11, of the movable die 12 are provided with positioning rods 62, and the four positioning rods 62 are respectively matched with the four positioning holes 61. By the design, the buckling precision of the fixed die 11 and the movable die 12 can be improved.

The driving mechanism comprises two hydraulic rods 63 fixedly connected with the C-shaped frame 1, and an output shaft of each hydraulic rod 63 penetrates through the C-shaped frame 1 to be fixedly connected with the movable die 12. The hydraulic rod 63 expands and contracts to drive the movable mold 12 to move closer to the fixed mold 11 or away from the fixed mold 11.

The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims of this invention, which are within the skill of those skilled in the art, can be made without departing from the spirit and scope of the invention disclosed herein.

Claims

1. The utility model provides an injection moulding mould, includes C shape frame, C shape frame one side is equipped with the cover half, C shape frame other side is equipped with the movable mould, C shape frame is equipped with movable mould assorted actuating mechanism, cover half and movable mould opposite side all are equipped with the shaping die cavity, its characterized in that: the side up-down symmetry of C shape frame is equipped with the sleeve, two equal sliding fit is equipped with the sealing block in the sleeve, both sides all are equipped with the slide bar about the movable mould, the sealing block left side is equipped with the cover and establishes the first spring on slide bar surface, two the slide bar slides respectively and stretches into in two sleeves, be equipped with stop gear between slide bar tip and the sealing block, stop gear is including setting up the step hole in the slide bar, be equipped with the second spring in the step hole, the first magnet piece of second spring upside fixedly connected with, first magnet piece upside fixedly connected with arc locking piece, the sealing block is equipped with the mounting groove towards slide bar one side, the mounting groove upside is equipped with the lockhole with arc locking piece assorted, two be equipped with between the sleeve with two first magnet piece assorted release mechanism, the upside the sleeve is kept away from C shape frame one side and is equipped with the air vent, and is close to C shape frame one side respectively to the sleeve is equipped with first inlet tube and first outlet pipe, first inlet tube and first outlet pipe and first side are equipped with first inlet tube and first outlet pipe valve and first outlet pipe side and first inlet tube and second outlet pipe and first outlet pipe side are equipped with first inlet tube and second outlet pipe and first outlet pipe and one-way valve, the one-way valve is equipped with the one-way inlet tube and second inlet tube and one-way valve is equipped with the one-way.

2. An injection molding die as claimed in claim 1, wherein: the unlocking mechanism comprises a mounting plate, a second magnet block which is repulsed with a first magnet block is assembled on one side, close to the C-shaped frame, of the lower surface of the mounting plate, a sliding groove is formed in the upper side of the mounting plate, a third magnet block which is repulsed with the first magnet block is assembled in the sliding groove in a sliding manner, a rebound component which is matched with the third magnet block is arranged in the sliding groove, a sliding hole is formed in one side, far away from the C-shaped frame, of the lower surface of the mounting plate, a fourth magnet block which is repulsed with the first magnet block is arranged in the sliding hole, an iron block which is repulsed with the fourth magnet block is arranged on the upper surface of the sealing block on the lower side, the attractive force between the iron block and the first magnet block is smaller than the repulsive force between the second magnet block and the first magnet block, a third spring is assembled on the lower side of the fourth magnet block, and a linkage component is assembled between the fourth magnet block and the third magnet block.

3. An injection molding die according to claim 2, wherein: the rebound assembly comprises a limiting rod arranged in the chute, the third magnet block is sleeved on the outer surface of the limiting rod, and a fourth spring abutted against the third magnet block is sleeved on the right side of the limiting rod.

4. An injection mold according to claim 3, wherein: the linkage assembly comprises a connecting hole communicated with the sliding hole and the sliding groove, a connecting wire is assembled in the connecting hole, and two ends of the connecting wire are fixedly connected with the third magnet block and the fourth magnet block respectively.

5. An injection molding die as claimed in claim 1, wherein: the pressure mechanism comprises a cavity arranged at the lower side of a movable die, grooves are formed in the inner walls of the left side and the right side of the cavity, fixing rods are arranged in the grooves, connecting rods are sleeved on the fixing rods in a sliding mode, a fifth spring is sleeved on the outer surface of the upper side of each fixing rod, the upper end and the lower end of each fifth spring are respectively fixedly connected with the inner wall of the upper side of the corresponding groove and the connecting rod, supporting rods are arranged on the upper side of each connecting rod, communicating holes communicated with the cavities are formed in the inner wall of the lower side of each forming cavity, sealing blocks matched with the communicating holes are arranged on the upper side of each supporting rod, and each first water inlet pipe and each second water outlet pipe are communicated with the corresponding cavity.

6. An injection molding die as claimed in claim 1, wherein: the storage mechanism comprises a storage frame arranged on the outer side of the C-shaped frame, and the lower ends of the first water outlet pipe and the second water inlet pipe extend into the storage frame.

7. An injection molding die as claimed in claim 1, wherein: the four corners of the fixed die are provided with positioning holes, the four corners of one side of the movable die, which is opposite to the fixed die, are provided with positioning rods, and the four positioning rods are respectively matched with the four positioning holes.

8. An injection molding die as claimed in claim 1, wherein: the driving mechanism comprises two hydraulic rods fixedly connected with the C-shaped frame, and an output shaft of the hydraulic rods penetrates through the C-shaped frame to be fixedly connected with the movable die.