CN219294641U

CN219294641U - Injection mold for producing auto parts

Info

Publication number: CN219294641U
Application number: CN202320275650.1U
Authority: CN
Inventors: 周爱军
Original assignee: Hangzhou Beide Plastic Mould Co ltd
Current assignee: Hangzhou Beide Plastic Mould Co ltd
Priority date: 2023-02-22
Filing date: 2023-02-22
Publication date: 2023-07-04
Anticipated expiration: 2033-02-22

Abstract

The utility model discloses an injection mold for producing automobile parts, and relates to the field of injection molds. According to the injection mold, through the cooperation of the pouring groove, the wedge block and the return device, the workpiece is separated from the cavity simply, conveniently and reliably after the injection molding part is molded, the surface damage of the workpiece caused by the fact that the workpiece is peeled off forcibly under the action of vacuum adsorption is avoided, meanwhile, the heat conducting water pipe is arranged in the lower mold, and the heat conducting water pipe is communicated with the water pump and the cooling water circulation box through the water inlet pipe and the water outlet pipe, so that the cooling speed of the injection mold is accelerated, the quality of the workpiece is guaranteed, and the working efficiency is improved.

Description

Injection mold for producing auto parts

Technical Field

The utility model relates to the field of injection molds, in particular to an injection mold for producing automobile parts.

Background

The injection mold is a tool for producing plastic products, and gives the plastic products complete structure and precise dimensions. Meanwhile, injection molding is a processing method used for mass production of parts with complex shapes, and the specific process comprises the steps of injecting heated and melted plastic into a mold cavity through an injection molding machine under high pressure, and obtaining a formed product after cooling and solidifying.

In the production process of automobile parts, a large number of injection molding parts are used for replacing metal parts, so that the overall light weight of an automobile is realized, but because the shapes of the automobile parts are complex, the automobile parts are easy to adsorb on the surface of a die after cooling and molding, manual disassembly is needed, and the production efficiency is reduced.

Disclosure of Invention

The utility model provides an injection mold for producing automobile parts, which aims at the defects in the background technology, and the injection mold can be easily taken down from the mold, so that the production efficiency is improved.

In order to achieve the above purpose, the present utility model provides the following technical solutions: an injection mold for producing an automotive part, comprising:

a bottom plate;

the bottom end of the support is connected with one side of the bottom plate;

the top plate is connected with the top end of the pillar;

the upper die is movably connected with the lower end face of the top plate and can move up and down relative to the top plate;

the lower die is connected with the upper end face of the bottom plate, and a pouring groove is formed in the upper part of the lower die and is in a round table shape with a large upper part and a small lower part;

the two wedge-shaped blocks are symmetrically distributed in the pouring groove and mutually abutted to form a cavity, a first reset spring is arranged at the bottom of each wedge-shaped block and connected with one end of the corresponding first reset spring, and the other end of the corresponding first reset spring is arranged in the lower die;

the two return devices comprise a return device head and a return device tail, through holes are symmetrically formed in the side wall of the pouring groove, blind holes with outward openings are formed in corresponding positions of the wedge-shaped blocks, and the return device head and the return device tail are respectively located in the through holes and the blind holes; the head part of the return device can completely press the tail part of the return device into the blind hole and then return to the original position; when the first return spring is compressed, the tail part of the return device can enable the bottom of the wedge-shaped block to be in contact with the bottom of the pouring groove.

By adopting the technical scheme, the mold core is arranged in the pouring groove, the two wedge blocks are placed in the pouring groove of the lower mold after being abutted, the upper mold is pressed down through the hydraulic rod, the wedge blocks are contacted with the bottom surface of the pouring groove, and at the moment, the tail parts of the return devices are blocked at the joint of the through holes in the side wall of the pouring groove and the blind holes of the wedge blocks, so that the wedge blocks are symmetrically distributed in the pouring groove and are mutually abutted to form a cavity; injecting the injection nozzle of the injection molding machine into the gate to start injection, filling molten plastic into the cavity, and lifting the upper die by the hydraulic rod after injection molding is completed, wherein an automobile part with a complex shape is molded in the cavity; meanwhile, the heads of return devices on two sides of the pouring groove are pressed, the tails of the return devices are completely pressed into the blind holes, at the moment, the blocking of the connection part of the side wall through holes of the pouring groove and the blind holes of the wedge-shaped blocks is eliminated, the two wedge-shaped blocks move upwards along the inner wall of the pouring groove in the resetting process of the first return spring, the distance between the two wedge-shaped blocks is continuously increased, and the injection molding piece and the cavity are taken out after being separated.

The utility model is further provided with: the head part of the return device comprises a return pin and a third return spring, one end of the return pin is inserted into the through hole, and the third return spring connects the other end of the return pin with the outer wall of the pouring groove; the tail part of the return device comprises a second return spring and an inserting block, and two ends of the second return spring are connected with the bottom of the blind hole and the tail part of the inserting block; when the third reset spring is loosened, the length of the reset pin inserted into the through hole is smaller than the length of the through hole; when the second reset spring is loosened, the head of the plug block extends out of the blind hole.

The utility model is further provided with: the middle part of die cavity is equipped with the core, the bottom of core is connected with the bottom surface of pouring spout.

The utility model is further provided with: the hydraulic rods are arranged between the top plate and the upper die and are connected through the hydraulic rods, and at least two hydraulic rods are arranged.

The utility model is further provided with: the upper die and the geometric center of the die cavity are provided with a main runner, and the lower end of the main runner is also provided with a sub-runner.

Preferably, the upper end of the main runner is also provided with a pouring gate.

The utility model is further provided with: four guide rods are uniformly distributed on the lower surface of the upper die, and four guide holes matched with the guide rods are formed in the upper surface of the lower die.

The utility model is further provided with: the lower die is internally provided with a communicated heat-conducting water pipe, and two ends of the heat-conducting water pipe are respectively provided with a water inlet pipe and a water outlet pipe.

Preferably, the water inlet pipe and the water outlet pipe are provided with a water pump and a cooling water circulation box, and the water inlet pipe and the water outlet pipe are communicated with the cooling water circulation box through the water pump.

In general, the above technical solutions conceived by the present utility model, compared with the prior art, enable the following beneficial effects to be obtained:

1. through the cooperation of pouring spout, wedge and return device, simple and reliable with work piece and die cavity separation after the injection molding shaping of shape complicacy, avoided the work piece surface damage that leads to with the work piece stripping by force under the vacuum adsorption effect, improved work efficiency simultaneously.

2. The heat conducting water pipe is arranged in the lower die and is communicated with the water pump and the cooling water circulation box through the water inlet pipe and the water outlet pipe, so that the cooling speed of the injection mold is accelerated, the quality of workpieces is ensured, and the working efficiency is improved.

Drawings

FIG. 1 is a sectional view showing the whole structure of the present embodiment 1;

FIG. 2 is a cross-sectional view of the whole structure A-A of the present embodiment 1;

FIG. 3 is a detailed view of the partial a structure of the present embodiment 1;

the meaning of each reference numeral in the drawings: 1. a bottom plate; 2. a support post; 3. a top plate; 4. a hydraulic rod; 5. an upper die; 501. a gate; 502. a main flow passage; 503. a sub-runner; 6. a guide rod; 7. a guide hole; 8. a lower die; 9. wedge blocks; 10. a cavity; 11. a core; 12. a heat conducting water pipe; 13. a first return spring; 14. a water inlet pipe; 15. a water outlet pipe; 16. a water pump; 17. a cooling water circulation tank; 18. a second return spring; 19. inserting blocks; 20. a third return spring; 21. a return pin; 22. a pouring tank; 23. a return device head; 24. the tail part of the return device.

Description of the embodiments

The following detailed description of the utility model, taken in conjunction with the accompanying drawings, will provide those skilled in the art with a more readily understood understanding of how the utility model may be practiced. While the present utility model has been described in connection with the preferred embodiments thereof, these embodiments are set forth only and are not intended to limit the scope of the utility model.

As shown in fig. 1 to 3, an injection mold for producing an automobile part includes:

a base plate 1;

the bottom end of the support column 2 is connected with one side of the bottom plate 1;

a top plate 3, wherein the top plate 3 is connected with the top end of the pillar 2;

the same sides of the bottom plate 1 and the top plate 3 are connected through the support posts 2, and the connection mode can adopt a permanent welding mode or a detachable bolt connection mode, etc.

The upper die 5 is movably connected with the lower end face of the top plate 3, and the upper die 5 can move up and down relative to the top plate 3;

the lower die 8 is connected with the upper end face of the bottom plate 1, a pouring groove 22 is formed in the upper portion of the lower die 8, and the pouring groove 22 is in a round table shape with a large upper part and a small lower part;

the two wedge blocks 9 are symmetrically distributed in the pouring groove 22 and mutually abutted to form a cavity 10, a first reset spring 13 is arranged at the bottom of the wedge block 9 and connected with one end of the first reset spring 13, and the other end of the first reset spring 13 is arranged in the lower die 8;

when the upper die 5 and the lower die 8 are in the die-closing state, the wedge 9 is attached to the bottom of the pouring groove 22, and the first return spring 13 is in the compressed state.

The two return devices comprise a return device head 23 and a return device tail 24, through holes are symmetrically formed in the side wall of the pouring groove 22, blind holes with outward openings are formed in corresponding positions of the wedge-shaped blocks 9, and the return device head 23 and the return device tail 24 are respectively located in the through holes and the blind holes; the head part 23 of the return device can completely press the tail part 24 of the return device into the blind hole and then return to the original position; the return means tail 24 enables the bottom of the wedge 9 to remain in contact with the bottom of the pouring spout 22 when the first return spring 13 is under compression.

The return device head 23 and the return device tail 24 are in a relaxed state when the first return spring 13 is in compression (when the mold is closed and injection molding is waited), namely the return device head 23 is positioned in a through hole on the side wall of the pouring slot 22, no interference is generated on the wedge-shaped block 9, and the return device tail 24 forms interference at the communication position of the through hole and the blind hole, so that the bottom of the wedge-shaped block 9 is kept in contact with the bottom of the pouring slot 22; the return device head 23 and the return device tail 24 may or may not contact each other at this time, so long as it is ensured that after the return device head 23 is forced against the return device tail 24 (during the process of taking out the workpiece), the return device tail 24 can be completely pressed into the blind hole to eliminate the interference of the return device tail 24 on the connection position between the through hole and the blind hole, and at the same time, the return device head 23 can return to the original position after the return device head 23 no longer applies a force to the return device tail 24.

Preferably, the return device head 23 includes a return pin 21 and a third return spring 20, one end of the return pin 21 is inserted into the through hole, and the third return spring 20 connects the other end of the return pin 21 with the outer wall of the pouring slot 22; the tail 24 of the return device comprises a second return spring 18 and an insert block 19, and two ends of the second return spring 18 are connected with the bottom of the blind hole and the tail of the insert block 19; when the third return spring 20 is relaxed, the length of the return pin 21 inserted into the through hole is smaller than the length of the through hole; when the second return spring 18 is relaxed, the head of the insert 19 protrudes out of the blind hole.

The return device head 23 can adopt a simple pressing mode of the return pin 21 and the third return spring 20, a knob mode of matching a threaded rod with an internal threaded hole, or an automatic structure of a hydraulic column in a pneumatic mode.

Preferably, a core 11 is provided in the middle of the cavity 10, and the bottom of the core 11 is connected to the bottom of the pouring slot 22.

The upper end of the core 11 is also provided with a chamfer.

Preferably, a hydraulic rod 4 is arranged between the top plate 3 and the upper die 5 and is connected with the upper die through the hydraulic rod 4, and at least two hydraulic rods 4 are arranged.

The stability of the upper die 5 and the lower die 8 during die opening and closing can be improved by adopting a plurality of hydraulic rods 4 for driving.

Preferably, a main runner 502 is provided at a position where the geometric center of the upper mold 5 and the cavity 10 overlap, and a sub runner 503 is further provided at the lower end of the main runner 502.

And the main runner 502 is matched with the sub-runners 503 to improve the filling speed of the melt during injection molding, so that the quality of the workpiece is improved.

Further, a gate 501 is further disposed at the upper end of the main runner 502.

As a preferable scheme, four guide rods 6 are uniformly distributed on the lower surface of the upper die 5, and four guide holes 7 matched with the guide rods 6 are formed on the upper surface of the lower die 8.

A plurality of guide rods 6 are matched with the guide holes 7, so that alignment during die assembly is facilitated.

As a preferable scheme, a heat conducting water pipe 12 is arranged in the lower die 8, and two ends of the heat conducting water pipe 12 are respectively provided with a water inlet pipe 14 and a water outlet pipe 15.

The heat conducting water pipe is arranged in the lower die, and the cooling water is circulated through the water inlet pipe and the water outlet pipe, so that the cooling speed of the injection die is increased, and the quality of the workpiece is ensured.

Further, a water pump 16 and a cooling water circulation tank 17 are arranged outside the water inlet pipe 14 and the water outlet pipe 15, and the water inlet pipe 14 and the water outlet pipe 15 are communicated with the cooling water circulation tank 17 through the water pump 16.

The water pump 16 continuously sends cooling water with increased temperature into the cooling water circulation tank 17, low-temperature cooling water in the cooling water circulation tank 17 is sent into the heat conducting water pipe 12 again through the other water pump 16, and the circulation is performed, so that the best heat absorption effect of the heat conducting water pipe 12 is ensured, and the cooling speed of the injection mold is increased.

In summary, the working principle of the utility model is that an upper die 5 and a lower die 8 are installed between a bottom plate 1 and a top plate 3, a core 11 is installed in a pouring slot 22 of the lower die 8, two wedge blocks 9 are abutted and then placed in the pouring slot 22 of the lower die 8, the upper die 5 is pressed down by a hydraulic rod 4, the wedge blocks 9 are contacted with the bottom surface of the pouring slot 22, at the moment, the tail 24 of a return device is blocked at the joint of a side wall through hole of the pouring slot 22 and a blind hole of the wedge block 9, so that the wedge blocks 9 are symmetrically distributed in the pouring slot 22 and mutually abutted to form a cavity 10; the injection nozzle of the injection molding machine is inserted into the gate 501 to start injection molding, molten plastic is filled into the cavity 10, and after injection molding is completed, the hydraulic rod 4 is lifted to lift the upper die 5, and at the moment, automobile parts with complex shapes are molded in the cavity 10; simultaneously, the return device heads 23 on two sides of the pouring groove 22 are pressed, the return device tail 24 is completely pressed into the blind hole, at the moment, the blocking of the connection part of the side wall through hole of the pouring groove 22 and the blind hole of the wedge-shaped block 9 is eliminated, the two wedge-shaped blocks 9 move upwards along the inner wall of the pouring groove 22 in the resetting process of the first return spring 13, the distance between the two wedge-shaped blocks is continuously increased, and the injection molding piece is taken out after being separated from the cavity 10.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and various modifications and variations may be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An injection mold for producing auto parts, characterized in that: comprising the following steps:

a bottom plate (1);

the bottom end of the support column (2) is connected with one side of the bottom plate (1);

the top plate (3), the top plate (3) is connected with the top end of the pillar (2);

the upper die (5) is movably connected with the lower end face of the top plate (3), and the upper die (5) can move up and down relative to the top plate (3);

the lower die (8) is connected with the upper end face of the bottom plate (1), a pouring groove (22) is formed in the upper portion of the lower die (8), and the pouring groove (22) is in a round table shape with a large upper portion and a small lower portion;

the two wedge blocks (9) are symmetrically distributed in the pouring groove (22) and are mutually abutted to form a cavity (10), a first reset spring (13) is arranged at the bottom of the wedge block (9) and is connected with one end of the first reset spring (13), and the other end of the first reset spring (13) is arranged in the lower die (8);

the two return devices comprise a return device head (23) and a return device tail (24), through holes are symmetrically formed in the side wall of the pouring groove (22), blind holes with outward openings are formed in corresponding positions of the wedge-shaped blocks (9), and the return device head (23) and the return device tail (24) are respectively located in the through holes and the blind holes; the head part (23) of the return device can completely press the tail part (24) of the return device into the blind hole and then return to the original position; when the first return spring (13) is compressed, the return device tail (24) can keep the bottom of the wedge-shaped block (9) in contact with the bottom of the pouring groove (22).

2. The injection mold for producing an automobile part according to claim 1, wherein: the return device head (23) comprises a return pin (21) and a third return spring (20), one end of the return pin (21) is inserted into the through hole, and the third return spring (20) is used for connecting the other end of the return pin (21) with the outer wall of the pouring groove (22); the tail part (24) of the return device comprises a second return spring (18) and an insert block (19), and two ends of the second return spring (18) are connected with the bottom of the blind hole and the tail part of the insert block (19); when the third return spring (20) is loosened, the length of the return pin (21) inserted into the through hole is smaller than the length of the through hole; when the second return spring (18) is relaxed, the head of the insert block (19) extends out of the blind hole.

3. The injection mold for producing an automobile part according to claim 1, wherein: the middle part of the die cavity (10) is provided with a core (11), and the bottom of the core (11) is connected with the bottom surface of the pouring groove (22).

4. The injection mold for producing an automobile part according to claim 1, wherein: a hydraulic rod (4) is arranged between the top plate (3) and the upper die (5) and is connected through the hydraulic rod (4), and at least two hydraulic rods (4) are arranged.

5. The injection mold for producing an automobile part according to claim 1, wherein: the geometric center coincidence position of the upper die (5) and the die cavity (10) is provided with a main runner (502), and the lower end of the main runner (502) is also provided with a sub runner (503).

6. The injection mold for producing an automobile part according to claim 5, wherein: the upper end of the main runner (502) is also provided with a pouring gate (501).

7. The injection mold for producing an automobile part according to claim 1, wherein: four guide rods (6) are uniformly distributed on the lower surface of the upper die (5), and four guide holes (7) matched with the guide rods (6) are formed in the upper surface of the lower die (8).

8. The injection mold for producing an automobile part according to claim 1, wherein: the lower die (8) is internally provided with a communicated heat conduction water pipe (12), and two ends of the heat conduction water pipe (12) are respectively provided with a water inlet pipe (14) and a water outlet pipe (15).

9. The injection mold for producing an automobile part according to claim 8, wherein: the water inlet pipe (14) and the water outlet pipe (15) are provided with a water pump (16) and a cooling water circulation tank (17), and the water inlet pipe (14) and the water outlet pipe (15) are communicated with the cooling water circulation tank (17) through the water pump (16).