Adjustable pin assembly and injection mold

Abstract

The present invention discloses an adjustable pin inserting assembly, comprising a pin inserting sleeve with threads, a pin inserting needle with threads, a headless screw and a headless screw with a convex end. The pin inserting sleeve with threads is provided with a mounting hole, and the pin inserting needle is provided in the pin inserting sleeve with threads. The pin inserting needle is fixedly connected in sequence by a needle body, a conical connecting portion and a needle seat. The end of the needle body extends out of the pin inserting sleeve with threads, and the needle seat is threadedly connected with the pin inserting sleeve with threads. The headless screw is located outside the pin inserting sleeve away from one end of the needle body, and a first through hole is provided inside the headless screw, and a first external thread is provided on the outer wall thereof. One end of the headless screw with a convex end has a second external thread, and one end thereof penetrates into the first through hole and extends to the end of the pin inserting needle with threads. The present invention also discloses an injection mold. The present invention provides an assembly hole on the mold, and the adjustable pin inserting assembly is installed in the mold through the assembly hole, so that the mold can be avoided from being disassembled, and the pin inserting assembly can be adjusted and replaced quickly, which saves time and effort, is simple to operate, and improves production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to an adjustable pin-inserting component and an injection mold. Background Art

[0002] Automobile interior panels are usually made of hard plastic injection molding, and fabric needs to be pasted on the surface of some interior panels. When pasting fabric, bubbles are easily generated between the fabric and the surface of the interior panel. It is necessary to open a plurality of evenly distributed micropores with a diameter of 1 mm on the interior panel so that the gas can be discharged and the fabric is tightly attached to the surface of the interior panel. In order to make the molded interior panel have a plurality of evenly distributed micropores, it is usually necessary to install a needle body with a diameter of 1 mm on the inner wall of the mold cavity. Since the needle body has a small diameter and is very easy to wear, after the mold has been used for a period of time, the end of the needle body is severely worn and cannot penetrate the inner wall of the injection molding cavity after the mold is closed, resulting in the micropores on the molded interior panel being blocked and unable to be exhausted. Therefore, after a period of use, it is necessary to adjust the length of the needle body extending into the injection molding cavity, or replace the needle body. Adjusting or replacing the needle body requires disassembling the mold, which is difficult to operate, time-consuming and labor-intensive, and affects production efficiency. Therefore, the prior art needs to be further improved. Summary of the invention

[0003] In view of the above-mentioned deficiencies of the prior art, one object of the present invention is to provide an adjustable needle insert assembly to solve the problem that the mold needs to be disassembled to adjust or replace the needle body, which is difficult to operate, time-consuming and labor-intensive, and affects production efficiency.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] An adjustable pin assembly comprises a threaded pin sleeve, a threaded pin, a headless screw and a convex-end headless screw. The threaded pin sleeve is provided with a mounting hole with two open ends, and the threaded pin is arranged in the threaded pin sleeve.

[0006] The toothed insert needle is a stepped shaft structure, and the toothed insert needle is composed of a needle body, a conical connecting part and a needle seat which are fixedly connected end to end in sequence.

[0007] The end of the needle body extends out of the threaded needle sleeve, and the needle seat is threadedly connected with the threaded needle sleeve.

[0008] The headless screw is located outside the end of the threaded needle sleeve away from the needle body. A first through hole is opened inside the headless screw, and a first external thread is provided on the outer side wall thereof.

[0009] One end of the convex-end headless screw has a second external thread, and one end of the convex-end headless screw penetrates into the first through hole and extends to the end of the threaded insert pin.

[0010] Furthermore, the needle seat and the needle body are both cylindrical structures with equal cross-sections, and the diameter of the needle body is smaller than the diameter of the needle seat.

[0011] The conical connecting part is a truncated cone structure, the diameter of one end of the conical connecting part is equal to the diameter of the needle body, and the axis of the needle body and the axis of the needle seat both coincide with the axis of the conical connecting part.

[0012] Furthermore, the inner wall of the mounting hole is provided with a first internal thread, and the outer wall of the needle seat is provided with a third external thread matched with the first internal thread.

[0013] A first hexagonal hole is provided on the end surface of the needle seat, and an end of the mounting hole away from the needle seat is matched with the needle body.

[0014] Furthermore, the headless screw is a cylindrical structure, and the axis of the first through hole inside the screw coincides with the axis of the needle seat.

[0015] The first through hole is a regular hexagonal through hole, and the end of the first through hole positively corresponds to the needle seat with the threaded needle.

[0016] Furthermore, the convex-end headless screw comprises a screw body and a convex-end part, both of which are cylindrical structures, and one end of the screw body is coaxially fixed with the corresponding end of the convex-end part to form an integral structure.

[0017] The second external thread is located on the annular side wall of the screw body, and the convex end portion is located in the headless screw.

[0018] Furthermore, the convex-end headless screw has a second through hole inside, and the second through hole corresponds to the first hexagon socket hole.

[0019] One end of the convex headless screw away from the threaded insert pin is provided with a second hexagonal inner hole, and the center of the second hexagonal inner hole is located on the axis of the second through hole.

[0020] Furthermore, the end of the threaded pin sleeve close to the headless screw has a limiting portion.

[0021] Another object of the present invention is to provide an injection mold.

[0022] An injection mold is provided with the above-mentioned adjustable pin assembly. An assembly hole is opened on one side of the injection mold, the assembly hole connects the injection cavity of the injection mold with the outside, and the adjustable pin assembly is arranged in the assembly hole.

[0023] The inner wall of the assembly hole is provided with a second inner thread matched with the first outer thread, and the inner wall thereof is provided with a third inner thread matched with the second outer thread.

[0024] Furthermore, the threaded pin sleeve is fixedly embedded in one end of the assembly hole close to the injection cavity, the assembly hole has a step matching the limiting portion, and the end surface of the threaded pin sleeve is a part of the inner wall of the injection cavity.

[0025] Furthermore, the end of the needle body extends into the interior of the injection molding cavity and penetrates the inner wall of the injection molding cavity.

[0026] By adopting the above technical scheme, the beneficial technical effect of the present invention is: the present invention opens an assembly hole on the mold, and installs the adjustable pin assembly into the mold through the assembly hole, thereby avoiding disassembly of the mold, and the pin is quickly adjusted and replaced, which saves time and labor, is simple to operate, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic exploded view of the structure of an adjustable pin inserting assembly of the present invention.

[0028] Figure 2 yes Figure 1 A schematic diagram of the axial structure of a part of the present invention shows a threaded needle sleeve.

[0029] Figure 3 yes Figure 1 Another part of the axial structure schematic diagram of the present invention shows a threaded insert pin.

[0030] Figure 4 yes Figure 1 A schematic diagram of the axial structure of another part of the present invention shows a headless screw.

[0031] Figure 5 yes Figure 1 This is a schematic diagram of the axial structure of another part, showing a convex end headless screw.

[0032] Figure 6 It is a structural schematic diagram of an injection mold of the present invention.

[0033] Figure 7 yes Figure 6 A partial enlarged view of part A. DETAILED DESCRIPTION

[0034] The present invention is described in detail below in conjunction with the accompanying drawings:

[0035] Embodiment 1, combination Figures 1 to 5 , an adjustable pin assembly, the adjustable pin assembly is installed in an assembly hole of a mold, and the end of the assembly hole is located on the side wall of the mold.

[0036] The adjustable pin insert assembly includes a threaded pin insert sleeve 1, a threaded pin 2, a headless screw 3 and a convex headless screw 4. The threaded pin insert sleeve 1 is provided with a mounting hole 11 with both ends open. The threaded pin 2 is arranged in the threaded pin insert sleeve 1. The rear end of the threaded pin 2 is threadedly connected with the threaded pin insert sleeve 1, and the front end of the threaded pin 2 extends out of the threaded pin insert sleeve 1. The headless screw 3 is located at the rear side of the threaded pin 2, and the convex headless screw 4 is located at the rear side of the headless screw 3. Its front end extends into the interior of the headless screw 3 and supports the rear end of the threaded pin 2 to prevent it from loosening. The threaded pin insert sleeve 1 has a limiting portion 12 at one end close to the headless screw 3. The limiting portion 12 cooperates with the shoulder of the mold assembly hole to limit the rotation of the threaded pin insert sleeve 1.

[0037] The threaded needle 2 is a stepped shaft structure. The threaded needle 2 includes a needle body 21, a conical connecting portion 22 and a needle seat 23 arranged in sequence from front to back. The needle body 21, the conical connecting portion 22 and the needle seat 23 are fixedly connected end to end to form an integrated structure. The needle seat 23 and the needle body 21 are both cylindrical structures with equal cross-sections. The diameter of the needle body 21 is smaller than the diameter of the needle seat 23, and the diameter of the needle body 21 is 1 mm. The conical connecting portion 22 is a truncated cone structure. The diameter of one end of the conical connecting portion 22 is equal to the diameter of the needle body 21. The axis of the needle body 21 and the axis of the needle seat 23 both coincide with the axis of the conical connecting portion 22.

[0038] The front end of the needle body 21 extends out of the front end of the threaded needle sleeve 1, and the needle seat 23 is threadedly connected to the threaded needle sleeve 1. Specifically, the mounting hole 11 is a stepped hole, the front section of the mounting hole 11 is adapted to the needle body 21, the middle section of the mounting hole 11 is matched with the tapered connecting portion 22, and the rear section of the mounting hole 11 is matched with the needle seat 23. The inner wall of the rear section of the mounting hole 11 has a first internal thread, the outer wall of the needle seat 23 has a third external thread adapted to the first internal thread, and a first hexagonal hole 24 is provided on the end surface of the needle seat 23. When it is necessary to adjust the length of the front end of the needle body 21 extending out of the front end of the threaded needle sleeve 1, use an internal hexagonal wrench with an extension rod to insert the internal hexagonal hole of the needle seat 23 and rotate the needle seat 23.

[0039] The headless screw 3 is located outside the end of the threaded needle sleeve 1 away from the needle body 21. The headless screw 3 has a first through hole 31 inside. The first through hole 31 is a regular hexagonal through hole. The hexagonal wrench that can rotate the needle seat 23 is inserted through the first through hole 31. The headless screw 3 is a cylindrical structure. The axis of the first through hole 31 inside it coincides with the axis of the needle seat 23. The end of the first through hole 31 corresponds to the needle seat 23 of the threaded needle 2. The outer wall of the headless screw 3 has a first external thread. The headless screw 3 is threadedly connected to the inner wall of the assembly hole of the mold through the first external thread. The headless screw 3 is inserted into the first through hole 31 of the headless screw 3. The headless screw 3 can be rotated to lock the threaded needle sleeve 1 to prevent it from moving axially.

[0040] The convex headless screw 4 includes a screw body 41 and a convex end portion 42. Both the screw body 41 and the convex end portion 42 are cylindrical structures. One end of the screw body 41 is coaxially fixed with the corresponding end of the convex end portion 42 to form an integral structure. The outer wall of the screw body 41 of the convex headless screw 4 has a second external thread. The convex headless screw 4 is threadedly connected to the inner wall of the assembly hole of the mold through the second external thread. The convex end portion 42 of the convex headless screw 4 penetrates the first through hole 31 and extends to the end of the threaded insert pin 2, locking the threaded insert pin 2 to prevent it from moving axially. The second external thread is located on the annular side wall of the screw body 41, and the convex end portion 42 is located inside the headless screw 3.

[0041] The convex headless screw 4 has a second through hole 43 inside, which is a circular hole with equal cross section. The front end of the second through hole 43 corresponds to the first hexagon socket hole 24. The hexagon socket wrench for rotating the needle seat 23 can be inserted through the second through hole 43. The hexagon socket wrench for rotating the headless screw 3 can also be inserted through the second through hole 43. The end of the convex headless screw 4 away from the threaded pin 2 has a second hexagon socket hole 44. The second hexagon socket hole 44 is a countersunk hole located on the rear end surface of the screw body 41. The center of the second hexagon socket hole 44 is located on the axis of the second through hole 43. The convex headless screw 4 can be rotated using a hexagon socket wrench matching the second hexagon socket hole 44. After the threaded pin 2 is adjusted, the front end of the convex end portion 42 of the screw can lock the threaded pin 2.

[0042] Embodiment 2, combined Figures 1 to 7An injection mold is provided with the above-mentioned adjustable pin assembly. An assembly hole 5 is provided on one side of the injection mold. The assembly hole 5 connects the injection cavity of the injection mold with the outside, and the adjustable pin assembly is arranged in the assembly hole 5. A second internal thread matching the first external thread is provided on the inner wall of the assembly hole 5, and a third internal thread matching the second external thread is provided on the inner wall. The threaded pin sleeve 1 is fixedly embedded in one end of the assembly hole 5 close to the injection cavity. The assembly hole 5 has a step matching the limiting part 12, and the end face of the threaded pin sleeve 1 is a part of the inner wall of the injection cavity. The end of the needle body 21 extends into the injection cavity and penetrates the inner wall of the injection cavity.

[0043] The threaded needle sleeve 1 is installed into the assembly hole 5 of the injection mold. The limiting part 12 of the threaded needle sleeve 1 cooperates with the step of the assembly hole 5 to limit the rotation and axial movement of the threaded needle sleeve 1 in the assembly hole 5. The front end surface of the threaded needle sleeve 1 becomes a part of the injection cavity. The headless screw 3 is screwed into the assembly hole 5, and the headless screw 3 locks the threaded needle sleeve 1. The threaded needle 2 is screwed into the mounting hole 11 of the threaded needle sleeve 1. The front end of the needle body 21 of the threaded needle 2 extends out of the outside of the threaded needle sleeve 1, enters the injection cavity and hits the inner wall of the injection cavity. The first hexagonal hole 24 is opened on the end surface of the needle seat 23 to adjust the extension length of the needle body 21. The convex-end headless screw 4 is screwed into the assembly hole 5, and the convex end part 42 of the convex-end headless screw 4 locks the threaded insert pin 2. The threaded insert pin 2 can be adjusted by inserting an Allen wrench with an extended handle into the assembly hole 5 from the outside of the mold, and the operation is simple and fast.

[0044] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. An adjustable pin assembly, comprising a pin sleeve with threads, a pin with threads, a headless screw and a convex headless screw, characterized in that: The threaded pin sleeve is provided with a mounting hole with two open ends, and the threaded pin is arranged in the threaded pin sleeve; The threaded insert needle is a stepped shaft structure, and the threaded insert needle is composed of a needle body, a tapered connecting part and a needle seat, which are fixedly connected end to end in sequence; The inner wall of the mounting hole is provided with a first internal thread, and the outer wall of the needle seat is provided with a third external thread matching the first internal thread; A first hexagonal hole is provided on the end surface of the needle seat, and an end of the mounting hole away from the needle seat is adapted to the needle body; The end of the needle body extends out of the threaded needle sleeve, and the needle seat is threadedly connected to the threaded needle sleeve; when it is necessary to adjust the length of the front end of the needle body extending out of the front end of the threaded needle sleeve, an inner hexagonal wrench with an extension rod is inserted into the inner hexagonal hole of the needle seat to rotate the needle seat; The headless screw is located outside the end of the threaded needle sleeve away from the needle body, a first through hole is formed inside the headless screw, and a first external thread is formed on the outer side wall thereof; The headless screw is a cylindrical structure, and the axis of the first through hole inside it coincides with the axis of the needle seat; The first through hole is a regular hexagonal through hole, and the end of the first through hole positively corresponds to the needle seat with the threaded needle; Insert a matching hexagonal wrench into the first through hole of the headless screw, so that the headless screw can be rotated to lock the threaded needle sleeve to prevent it from moving axially; One end of the convex headless screw has a second external thread, and one end thereof penetrates into the first through hole and extends to the end of the threaded pin; The convex end headless screw has a second through hole inside, the second through hole is a circular hole of equal cross section, the front end of the second through hole corresponds to the first inner hexagonal hole, and the inner hexagonal wrench for rotating the needle seat can be inserted through the second through hole, and the inner hexagonal wrench for rotating the headless screw can also be inserted through the second through hole; The end of the convex headless screw away from the threaded insert pin has a second hexagonal hole, the second hexagonal hole is a countersunk hole located on the rear end surface of the screw body, the center of the second hexagonal hole is located on the axis of the second through hole, and the convex headless screw can be rotated by using a hexagonal wrench matching the second hexagonal hole, so that the front end of the convex end part locks the threaded insert pin after the threaded insert pin is adjusted; The end of the threaded pin sleeve close to the headless screw is provided with a limiting portion, and the limiting portion cooperates with the shoulder of the mold assembly hole to limit the rotation of the threaded pin sleeve.

2. The adjustable pin assembly according to claim 1, characterized in that: The needle seat and the needle body are both cylindrical structures with equal cross-sections, and the diameter of the needle body is smaller than the diameter of the needle seat; The conical connecting part is a truncated cone structure, the diameter of one end of the conical connecting part is equal to the diameter of the needle body, and the axis of the needle body and the axis of the needle seat both coincide with the axis of the conical connecting part.

3. The adjustable pin assembly according to claim 1, characterized in that: The convex end headless screw comprises a screw body and a convex end portion, both of which are cylindrical structures, and one end of the screw body is coaxially fixed with the corresponding end of the convex end portion to form an integral structure; The second external thread is located on the annular side wall of the screw body, and the convex end portion is located in the headless screw.

4. An injection mold, equipped with the adjustable pin assembly according to any one of claims 1 to 3, characterized in that: An assembly hole is provided on one side of the injection mold, the assembly hole connects the injection cavity of the injection mold with the outside, and the adjustable pin assembly is arranged in the assembly hole; The inner wall of the assembly hole is provided with a second inner thread matched with the first outer thread, and the inner wall thereof is provided with a third inner thread matched with the second outer thread.

5. An injection mold according to claim 4, characterized in that: The threaded pin sleeve is fixedly embedded in one end of the assembly hole close to the injection cavity, the assembly hole is provided with a step matched with the limiting part, and the end surface of the threaded pin sleeve is a part of the inner wall of the injection cavity.

6. An injection mold according to claim 4, characterized in that: The end of the needle body extends into the interior of the injection molding cavity and penetrates the inner wall of the injection molding cavity.

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