Insert injection molding hardware positioning structure

Abstract

The utility model discloses a kind of positioning structure of insert injection molding hardware, including rear mould insert and positioning insert needle, rear mould insert is equipped with rear forming groove, it is characterized by: the insert needle hole that is communicated with rear forming groove is equipped in rear mould insert, the positioning insert needle is located in insert needle hole and can slide in insert needle hole, limiting structure and elastic piece are equipped between insert needle hole and positioning insert needle, the end of positioning insert needle can be ejected insert needle hole by elastic piece, the length of positioning insert needle is limited by limiting structure and projects on the length of groove bottom of rear forming groove. The above structure not only guarantees normal injection molding, but also can be placed hardware and positioned hardware before injection molding, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to an injection mold, and more particularly to a positioning structure for insert injection molded hardware. Background Technology

[0002] In plastic products, some require the embedding of metal parts, which necessitate positioning of these parts before injection molding. Previously, the structure consisted of a positioning pin fixed in the rear mold insert. The end of the positioning pin was located in the rear molding groove of the rear mold insert, and its thickness was the same as the corresponding part of the metal part. Therefore, when the metal part was manually placed into the rear molding groove, the positioning hole of the metal part mates with the positioning end, thus positioning the metal part. Because the area around the positioning hole is not covered with glue, the end face of the pin needs to be flush with the surface where the positioning hole is located. This ensures that the contact surface of the front mold insert contacts the surface around the positioning hole and the end face, creating a glue-free area in that region.

[0003] However, because the corresponding part of the hardware is very thin, less than 1 mm thick, the positioning hole of the hardware is too shallow and the length of the end in contact with the positioning hole is not enough. When the hardware is slightly skewed, the end is easy to come out of the positioning hole. Therefore, workers must be very careful when placing the hardware, which reduces work efficiency.

[0004] To solve the above problems, the applicant has designed an insert injection molding hardware positioning structure. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides a positioning structure for insert injection molded hardware parts.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A positioning structure for an insert injection molded hardware part includes a rear mold insert and a positioning pin. The rear mold insert is provided with a rear forming groove. The rear mold insert is characterized in that: the rear mold insert is provided with a pin hole that communicates with the rear forming groove; the positioning pin is located in the pin hole and can slide in the pin hole; a limiting structure and an elastic element are provided between the pin hole and the positioning pin; the elastic element can push the end of the positioning pin out of the pin hole; the limiting structure limits the length of the end of the positioning pin protruding from the bottom of the rear forming groove.

[0008] The limiting structure includes a stepped surface disposed in the pin hole and an end cap disposed on the positioning pin. The end cap can abut against the stepped surface to limit the length of the end of the positioning pin protruding from the bottom of the groove after forming.

[0009] The pin hole includes a first hole and a second hole. The diameter of the second hole is larger than the diameter of the first hole. The intersection of the first hole and the second hole forms the stepped surface. The positioning pin slides in the first hole and the end cap is located in the second hole. The length of the second hole is greater than the thickness of the end cap.

[0010] The rear mold has a mounting hole, and the elastic element is a spring located in the mounting hole. One end of the spring abuts against the bottom of the mounting hole, and the other end of the spring abuts against the positioning pin.

[0011] The beneficial effects of this utility model are as follows: This utility model provides a limiting structure and an elastic element between the insert hole and the positioning insert. The elastic element can push the end of the positioning insert out of the insert hole, and the limiting structure restricts the length of the positioning insert's end protruding from the bottom of the post-forming groove. Therefore, this application allows for a longer positioning insert, resulting in a longer length of the end protruding from the bottom of the post-forming groove, which is also much greater than the depth of the positioning hole. When the worker places the hardware in the post-forming groove, the end can pass through the positioning hole, so that even if the hardware is slightly misaligned, the end will not separate from the positioning hole. During mold closing, the contact surface of the front mold insert will press against the end face of the positioning insert, compressing the elastic element and causing the positioning insert to retract, making the end face of the positioning insert flush with the surface where the positioning hole of the hardware is located. This ensures normal injection molding and facilitates the placement and positioning of the hardware before injection molding, improving work efficiency. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 It is a cross-sectional view of the rear mold insert and positioning pins after the old structure was injection molded, and the product.

[0014] Figure 2 This is a cross-sectional view of the rear mold, rear mold insert, and positioning pin after injection molding of this utility model, and the product.

[0015] Figure 3 This is a structural diagram of the injection-molded rear mold insert and positioning pins of this utility model in relation to the product;

[0016] Figure 4 This is a structural diagram of the positioning insert and the product after injection molding of this utility model;

[0017] Figure 5 This is a structural diagram of the pre-mold positioning pin and hardware components of this utility model. Detailed Implementation

[0018] The advantages and features of this disclosure, as well as its implementation methods, will be illustrated by the following embodiments described with reference to the accompanying drawings. However, this disclosure may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of this disclosure to those skilled in the art. Furthermore, this disclosure is limited only by the scope of the claims.

[0019] The shapes, dimensions, scales, angles, and numbers disclosed in the accompanying drawings used to describe embodiments of this disclosure are merely examples, and therefore this disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, detailed descriptions of relevant known functions or configurations will be omitted where it is determined that such detailed descriptions would unnecessarily obscure the focus of this disclosure. Where the terms “comprising,” “having,” and “including” are used in this specification, additional components may be added unless “only” is used. Unless otherwise indicated, singular terms may include plural forms.

[0020] When interpreting components, even if not explicitly described, the components are understood to include a range of tolerances.

[0021] When describing positional relationships, such as "on," "above," "below," and "adjacent to," one or more parts may be arranged between two other parts unless "immediately following" or "directly" is used.

[0022] When describing temporal relationships, such as when time sequence is described as “after,” “following,” “next,” and “before,” discontinuous cases may be included unless “exactly” or “directly” is used.

[0023] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this disclosure.

[0024] As will be fully understood by those skilled in the art, the features of the different embodiments of this disclosure may be coupled or combined with each other in part or in whole, and may cooperate with each other and be technically driven in various ways. The embodiments of this disclosure may be implemented independently of each other, or may be implemented together in an interdependent relationship.

[0025] Reference Figures 2 to 5This utility model discloses a positioning structure for an insert injection molded hardware part, including a rear mold insert 1 and a positioning pin 2. The rear mold insert 1 is provided with a rear molding groove, and the rear mold insert 1 has a pin hole 3 that communicates with the rear molding groove. The positioning pin 2 is located in the pin hole 3 and can slide in the pin hole 3. A limiting structure and an elastic member 4 are provided between the pin hole 3 and the positioning pin 2. The elastic member 4 can push the end 5 of the positioning pin 2 out of the pin hole 3. The limiting structure limits the length of the end 5 of the positioning pin 2 protruding from the bottom of the rear molding groove. Through the above structure, the length of the positioning pin 2 can be increased to ensure that the length of the end 5 protruding from the bottom of the rear molding groove is longer than before. The length of the end pin 2 is much greater than the depth of the positioning hole 6. For example, if the depth of the positioning hole 6 was 0.5mm, the length of the end pin 5 protruding from the bottom of the post-forming groove would also be 0.5mm. After the hardware part 13 is placed into the post-forming groove, the end face of the end pin 5 will be flush with the surface where the positioning hole 6 of the hardware part 13 is located. However, in the above structure, the length of the end pin 5 in contact with the positioning hole 6 is not enough. When the hardware part 13 is slightly misaligned, the end pin 5 is easy to come out of the positioning hole 6. Therefore, the length of the positioning pin 2 has been increased, and the length of the end pin 5 protruding from the bottom of the post-forming groove is 5mm. In this way, when the end pin 5 is inserted into the positioning hole 6, even if the hardware part 13 is misaligned, the end pin 5 will not come out of the positioning hole 6.

[0026] As shown in the figure, the limiting structure includes a stepped surface 8 disposed in the pin hole 3 and an end cap 7 disposed on the positioning pin 2. The end cap 7 can abut against the stepped surface 8 to limit the length of the end 5 of the positioning pin 2 protruding from the bottom of the groove. When the positioning pin 2 moves under the action of the elastic member 4, the end cap 7 can abut against the stepped surface 8 to limit the positioning pin 2 from continuing to move. This position is also the position where the end 5 protrudes to the bottom of the groove by the maximum length.

[0027] Specifically, the pin hole 3 includes a first hole 9 and a second hole 10 that penetrates the first hole 9. Both the first hole 9 and the second hole 10 are round holes. The diameter of the second hole 10 is larger than the diameter of the first hole 9. Therefore, the intersection of the first hole 9 and the second hole 10 forms the stepped surface 8. The positioning pin 2 is slidably engaged with the first hole 9, and the end cap 7 is located in the second hole 10. The length of the second hole 10 is greater than the thickness of the end cap 7. Therefore, the end cap 7 can move a certain distance in the second hole 10. This distance is also equal to the maximum length of the end 5 protruding from the bottom of the post-forming groove.

[0028] In this application, the rear mold 11 is provided with a mounting hole 12, the elastic element 4 is a spring and is located in the mounting hole 12, one end of the spring abuts against the bottom of the mounting hole 12 and the other end of the spring abuts against the positioning pin 2. Through the design of the above structure, and with the processing and installation of the spring.

[0029] The above provides a detailed description of the positioning structure for an insert injection-molded hardware component provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A positioning structure for an insert injection molded hardware part, comprising a rear mold insert and a positioning pin, wherein the rear mold insert is provided with a rear forming groove, characterized in that: The rear mold insert has a pin hole that communicates with the rear forming groove. The positioning pin is located in the pin hole and can slide in the pin hole. A limiting structure and an elastic element are provided between the pin hole and the positioning pin. The elastic element can push the end of the positioning pin out of the pin hole. The limiting structure limits the length of the end of the positioning pin that protrudes from the bottom of the rear forming groove.

2. The positioning structure for an insert injection-molded hardware component according to claim 1, characterized in that: The limiting structure includes a stepped surface disposed in the pin hole and an end cap disposed on the positioning pin. The end cap can abut against the stepped surface to limit the length of the end of the positioning pin protruding from the bottom of the groove after forming.

3. The positioning structure for an insert injection-molded hardware component according to claim 2, characterized in that: The pin hole includes a first hole and a second hole. The diameter of the second hole is larger than the diameter of the first hole. The intersection of the first hole and the second hole forms the stepped surface. The positioning pin slides in the first hole and the end cap is located in the second hole. The length of the second hole is greater than the thickness of the end cap.

4. The positioning structure for an insert injection-molded hardware part according to claim 1, characterized in that: The rear mold has a mounting hole, and the elastic element is a spring located in the mounting hole. One end of the spring abuts against the bottom of the mounting hole, and the other end of the spring abuts against the positioning pin.

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