Glue pouring prevention structure of injection product
By combining the nut insert and cap structure, and utilizing the dual fixation of the mold insert and the body, the problem of glue filling of the nut insert during injection molding is solved, thereby improving product yield and mold durability.
Patent Information
- Application Number
- CN202520444944.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-14
AI Technical Summary
During the injection molding process, failure to secure the nut insert can lead to glue injection, resulting in a high product defect rate. Furthermore, the threads at the mold insert opening are prone to damage.
The design employs a combination structure of a nut insert and a cap. The cap and nut insert are integrally injection molded. The nut insert is fixed by mold pins and combined with the top and bottom surfaces of the main body to ensure stable positioning of the nut insert within the mold.
It effectively prevented glue filling problems, reduced product defect rates, protected mold insert openings, and improved production efficiency.
Smart Images
Figure CN223918485U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an injection molded product, and more particularly to an anti-gumming structure for injection molded products. Background Technology
[0002] like Figure 1 As shown, in the injection molding of a plastic product 100 with a nut insert 101, since the Z-direction of the nut insert 101 is not fixed, when the injection pressure is from bottom to top, the nut insert 101 will move upward, causing glue to be injected at position B. Furthermore, since the mold insert opening A needs to be sealed with glue, it is impossible to make C-corner guidance. During demolding, the sharp corner is easy to damage the thread, resulting in a high defect rate of the plastic product 100, which cannot meet normal production requirements. Utility Model Content
[0003] The purpose of this utility model is to provide an anti-gumming structure for injection molded products to prevent glue filling problems during the injection molding process.
[0004] To achieve the above objectives, the technical solution of this utility model is:
[0005] This utility model is an anti-gumming structure for injection molded products, including a body, a nut insert, and a cap; the nut insert has a through hole into which a mold insert pin is inserted, the cap is fixedly fitted on the top of the nut insert, and the middle of the body has a through hole that runs through the entire length. The nut insert and the cap are together fixedly fitted into the through hole of the body.
[0006] The top of the nut insert is a stepped column, and the lower part of the cap has a ring that fits onto the stepped column of the nut insert.
[0007] After adopting the above solution, since the material of the cap is the same as that of the main body, the cap is assembled with the nut insert before injection molding. The cap is fixedly sleeved on the top of the nut insert. Then, the nut insert and the cap are put into the injection mold together. During injection molding, the mold insert pin is inserted into the through hole of the nut insert to position the nut insert. The nut insert is fixed horizontally in the mold by the mold insert pin, and vertically fixed by the top and bottom surfaces of the main body by the injection mold, so that the nut insert is completely fixed, which solves the product defect problem caused by glue filling of the nut insert.
[0008] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description
[0009] Figure 1 This is a structural diagram of a traditional plastic product;
[0010] Figure 2 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0011] like Figure 2 As shown, this utility model is an anti-gumming structure for injection molded products, including a body 1, a nut insert 2, and a cap 3.
[0012] The nut insert 2 has a through hole 21 into which the mold insert pin 100 is inserted. The cap 3 is fixedly sleeved on the top of the nut insert 2. The middle part of the body 1 has a through hole 11 that runs through the entire length. The nut insert 2 and the cap 3 are fixedly sleeved in the through hole 11 of the body 1.
[0013] The top of the nut insert 2 is a stepped column 22, and the lower part of the cap 3 has a ring 31, which is fitted onto the stepped column 22 of the nut insert 2.
[0014] The working principle of this utility model:
[0015] Because of this utility model, the material of the cap 3 is the same as that of the body 1. Before injection molding, the cap 3 is first assembled with the nut insert 2 as a whole. The cap 3 is fixedly sleeved on the top of the nut insert 2. Then, the nut insert 2 and the cap 3 are put into the injection mold together. During injection molding, the mold insert pin 100 is inserted into the through hole of the nut insert 2 to position the nut insert 2. The nut insert 2 is fixed horizontally in the mold by the mold insert pin 100, and vertically fixed by the injection mold on the top surface A and bottom surface B of the body 1, so that the nut insert 2 is completely fixed.
[0016] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present utility model should still fall within the scope of the patent of the present utility model.
Claims
1. A glue injection prevention structure for an injection molded product, characterized by: It comprises a body, a nut insert and a cap, the nut insert has a through hole for a mold pin to be inserted into, the cap is fixedly sleeved on the top of the nut insert, the middle part of the body has a through hole penetrating the whole length, and the nut insert and the cap are fixedly sleeved in the through hole of the body.
2. The anti-siphoning structure of the injection-molded product according to claim 1, characterized in that: The top of the nut insert is a stepped column, and the lower part of the cap has a circular ring which is sleeved on the stepped column of the nut insert.