CN-224210382-U - Injection molding assembly and injection mold comprising a metal insert with a positioning cap

Abstract

An injection molding assembly comprising a metal insert with a positioning cap, the injection molding assembly further comprising an injection molding material, the metal insert being encased in the injection molding material, wherein the positioning cap is made of a plastic material, the positioning cap is fixed at one end of the metal insert, at least a portion of the positioning cap is encased in the injection molding material, and the positioning cap has a shape that matches the shape of the injection molding assembly. The present disclosure also relates to an injection mold.

Inventors

• WU YUHENG
• HU DONGXU
• Cheng Huaishun
• DING LIHUI

Assignees

• 舒尔电子(苏州)有限公司

Dates

Publication Date

20260508

Application Date

20250429

Claims (11)

1. 1. An injection molding assembly comprising a metal insert having a positioning cap, said injection molding assembly further comprising an injection molding material, said metal insert being encased in said injection molding material, characterized in that, The positioning cap is made of plastic materials; The positioning cap is fixed at one end of the metal insert; At least a portion of the positioning cap is encased in an injection molded material, the positioning cap having a profile that matches the profile of the injection molded component.
2. 2. An injection molding assembly as claimed in claim 1, wherein, The positioning cap comprises an integrally formed positioning cap base and a positioning cap protruding part; The positioning cap protrusion extending from the positioning cap base; The positioning cap protrusion is fixed at the one end of the metal insert.
3. 3. An injection molding assembly as claimed in claim 2, wherein, The positioning cap protruding portion is coated in an injection molding material, and the positioning cap base portion is exposed from the injection molding material.
4. 4. An injection molding assembly as claimed in claim 2 or 3, wherein, The positioning cap protruding part comprises a protruding part positioning hole and a protruding part dispensing hole which are communicated with each other; The one end of the metal insert is inserted into the protrusion positioning hole; The injection molding material extends into the tab dispensing aperture and engages the one end of the metal insert, thereby securing the one end of the metal insert in the tab positioning aperture.
5. 5. An injection molding assembly as claimed in claim 1, wherein, The metal insert has a circular cross section.
6. 6. An injection molding assembly as claimed in claim 1, wherein, The positioning cap is fixed at one end of the metal insert through a dispensing process or through a fastener.
7. 7. An injection mold configured for forming a metal insert with a positioning cap as defined in one of claims 1 to 6; the injection mold has a runner for setting the metal insert; The mold further comprises a positioning piece arranged at the other end of the metal insert, and the positioning piece is used for positioning the other end of the metal insert in the injection mold.
8. 8. The injection mold of claim 7, wherein the mold comprises a plurality of mold cavities, The positioning member includes lateral positioning members provided on both sides near the other end of the metal insert, thereby restricting lateral movement of the other end of the metal insert in a lateral direction.
9. 9. The injection mold of claim 8, wherein the mold comprises a plurality of mold cavities, The positioning member further includes a longitudinal positioning member provided on the upper surface near the other end of the metal insert, so as to restrict longitudinal movement of the other end of the metal insert in the longitudinal direction; The longitudinal direction is perpendicular to the transverse direction.
10. 10. The injection mold of claim 7, wherein the mold comprises a plurality of mold cavities, Injection gates are symmetrically arranged on two sides of the other end of the metal insert respectively, so that injection balance is realized; The injection molding pouring gate is close to the positioning piece; the injection molding gate is in fluid communication with the runner.
11. 11. The injection mold of claim 7, wherein the mold comprises a plurality of mold cavities, The injection mold has a mold receiving portion for receiving the positioning cap base, thereby securing the positioning cap base in the injection mold.

Description

Injection molding assembly and injection mold comprising a metal insert with a positioning cap Technical Field The present disclosure relates to an injection molding assembly, and more particularly, to an injection molding assembly including a metal insert having a locating cap. The present disclosure also relates to an injection mold. Background Insert molding is a common injection molding process for precisely coating the metal insert 3 inside the injection molding assembly 1 to meet the requirements of the product for structural strength or other functions. In the conventional insert molding process, as shown in fig. 1 to 3, in order to ensure that the metal insert 3 is not positionally shifted or exposed during the injection molding process, it is generally necessary to introduce an auxiliary opening structure 2 (e.g., a positioning hole, etc.) during the injection mold or product design stage. The opening structure provides positioning support for the insert through mechanical limiting or clamping action, so that stability of the insert in the injection filling stage is guaranteed. The prior art means: In the prior art, typical solutions include the following two approaches: And the positioning structure is that a clamping groove or a positioning pin matched with the shape of the insert is arranged in the injection mold, and the position of the insert is fixed through physical constraint. The auxiliary opening design of the product is to reserve an opening or a protruding structure matched with the insert on the plastic part, and realize positioning by utilizing the mechanical matching of the insert and the opening, for example, design a flange or a groove at the tail end of the insert so as to form interlocking with the injection mold or the opening of the plastic part. Defects of the prior art: Although the above technical means can solve the problem of positioning the insert to a certain extent, they have the following significant drawbacks: Appearance defects are that the surface of a product is complicated due to the fact that an auxiliary opening structure (such as holes, bosses and the like) is required to be arranged, aesthetic requirements of a market on compact and integrated design are difficult to meet, and the design is easy to exclude by customers and market staff especially in the fields of household appliances, consumer electronics and the like. The process complexity is that the design of the auxiliary opening requires additional processing steps, such as adding a positioning mechanism in the injection mold or processing the complex structure of the insert, thereby increasing the development cost and the production period of the injection mold. And the molding quality risk is that if the design of the opening structure is improper, uneven flow of molten plastic in the injection molding process can be caused, stress concentration is generated, so that the problems of insert deflection, incomplete plastic package, product deformation and the like are caused, and the yield is reduced. Functional limitations-the design of the opening may impair the tightness or mechanical strength of the product, for example in waterproof products or in high-load scenarios, the opening is prone to structural weakness. In summary, the conventional insert molding technology relies on auxiliary opening positioning, so that there is a significant contradiction among process feasibility, appearance aesthetics and product functionality, and an innovative solution is needed to ensure the positioning accuracy of the insert and realize the appearance traceless. Disclosure of utility model As described in the background art, the prior art suffers from the following drawbacks: Traditional schemes generally rely on reserving auxiliary openings (such as positioning holes, bosses and grooves) in plastic parts to position metal inserts. The design inevitably leaves marks on the appearance of the product, which results in complex appearance and is unfavorable for the product design in the fields of household appliances, consumer electronics and the like pursuing integrated aesthetic feeling. In order to realize the positioning function, a special mechanism (such as a clamping groove and a positioning pin) is often required to be additionally arranged in the injection mold or the insert body is subjected to complex structural processing, so that the manufacturing process and the production period of the mold are increased, and the cost is increased along with the increase. The auxiliary opening design may cause uneven melt flow of the plastic during injection molding, and local stress concentration occurs, so that insert deflection, incomplete cladding or local deformation of the product is caused, and the overall molding yield of the product is further affected. The secondary opening structure has an adverse effect on the sealability and mechanical strength of the product, especially in applications requiring waterproofin