CN-224214535-U - Fastener for cold forming injection molding

CN224214535UCN 224214535 UCN224214535 UCN 224214535UCN-224214535-U

Abstract

The utility model discloses a fastener for cold forming injection molding, which is provided with a first end and a second end which are opposite along the axial direction of the fastener, and comprises an insert head, a conical part, a flanging part, a plurality of concave parts, a connecting part and a connecting part, wherein the peripheral wall of the insert head is provided with a plurality of planes, the planes form a regular polygon in a plane perpendicular to the axial direction, one end of the conical part is connected with the second end of the insert head, the flanging part is connected with the other end of the conical part, the flanging part is inclined from the first end to the second end from inside to outside, the concave parts are inwards sunken and are connected with the insert head and the conical part, and the connecting part is used for fixedly connecting the fastener with an external part. The fastener for cold forming injection molding disclosed by the utility model is simple in processing and easy to form, and meanwhile, the risk of falling off of the fastener from an injection molding piece can be effectively reduced, and the connection reliability between the fastener and the injection molding piece is obviously improved.

Inventors

DUAN DAPENG
YU LUJUN
LAN Runyu

Assignees

宾科精密部件(中国)有限公司

Dates

Publication Date: 20260508
Application Date: 20250519

Claims (8)

1. A fastener for cold-forming injection molding, said fastener having axially opposite first and second ends thereof, comprising: The insert comprises an insert head, wherein the peripheral wall of the insert head is provided with a plurality of planes, and the planes form a regular polygon in a plane perpendicular to the axial direction; A tapered portion, one end of which is connected to the second end of the insert head; The flanging part is connected with the other end of the conical part, and inclines from the first end to the second end from inside to outside; The concave parts are recessed inwards and connect the insert head and the conical part; And the connecting part is used for fixedly connecting the fastener with an external part.
2. The cold-forming injection molding fastener of claim 1, wherein said recesses are the same number as said flat surfaces, any one of said recesses being aligned with a central portion of one of said flat surfaces.
3. The cold-forming injection molding fastener of claim 1, wherein the diameter of the first end of the tapered portion is greater than the diameter of the second end.
4. The fastener for cold forming injection molding according to claim 1, wherein the connecting portion is a threaded hole penetrating the fastener in an axial direction.
5. The cold-forming injection molding fastener of claim 1, wherein the connecting portion is a connecting member connected to the first end of the insert head.
6. The fastener for cold forming injection molding of claim 1, wherein the fastener is made of carbon steel.
7. The fastener for cold-forming injection molding according to claim 1, wherein the burring has a circular cross section perpendicular to the axial direction.
8. The fastener for cold-forming injection molding according to claim 1, wherein a cross section of the burring portion perpendicular to the axial direction is polygonal.

Description

Fastener for cold forming injection molding Technical Field The utility model relates to the technical field of fasteners for injection molding, in particular to a fastener for cold forming injection molding. Background The fastener for injection molding generally refers to a fastening element, such as a nut, a screw, a positioning column, a connector, etc., which is pre-embedded or embedded in the injection molding process of a plastic product, and the main material is metal. With the wide application of plastic products in various industrial fields, especially in the industries of automobiles, electronics, household appliances, medical appliances, communication equipment and the like, the requirements on connection, assembly and structural strength of plastic parts are continuously improved, and the injection molding fastener is used as an important part for enhancing the connection performance of the plastic parts, improving the mechanical strength and prolonging the service life of the plastic parts, so that the plastic parts are widely and widely applied. However, most of the existing injection molding fasteners adopt turning, so that the utilization rate of fastener materials suitable for the turning process is low, the processing speed is low, the production cost is relatively high, and the injection molding fasteners are not suitable for mass low-cost production. The fastener for cold forming injection molding provided by the utility model has a simple structure, is not easy to deviate from plastic compared with a fastener formed by turning, and has a wide application prospect. Disclosure of utility model In order to overcome the defects, the utility model aims to provide the fastener for cold forming injection molding, which is simple to process and easy to form, and can effectively reduce the risk of falling off the fastener from the injection molding piece, and remarkably improve the connection reliability between the fastener and the injection molding piece. The utility model discloses a fastener for cold forming injection molding, which is provided with a first end and a second end which are opposite along the axial direction, and comprises the following components: The insert comprises an insert head, wherein the peripheral wall of the insert head is provided with a plurality of planes, and the planes form a regular polygon in a plane perpendicular to the axial direction; A tapered portion, one end of which is connected to the second end of the insert head; The flanging part is connected with the other end of the conical part, and inclines from the first end to the second end from inside to outside; The concave parts are recessed inwards and connect the insert head and the conical part; And the connecting part is used for fixedly connecting the fastener with an external part. Further, the number of the concave portions is the same as the number of the flat surfaces, and any one of the concave portions is aligned with a middle portion of one of the flat surfaces. Further, the diameter of the first end of the tapered portion is greater than the diameter of the second end. Further, the connecting portion is a threaded hole penetrating through the fastener in the axial direction. Further, the connecting part is a connecting piece connected to the first end of the head of the insert. Further, the fastener is made of carbon steel. Further, the cross section of the flanging part vertical to the axial direction is circular. Further, the cross section of the flanging part vertical to the axial direction is polygonal. The beneficial effects of the utility model are as follows: (1) According to the utility model, the planes are arranged on the head of the insert, so that the rotation of the fastener can be effectively prevented in the injection molding process, and the binding force between the fastener and the injection molding piece is improved; (2) By arranging the conical part and the concave parts, the fastening piece can further enhance the biting force with the plastic material in the process of injection molding the insert, and the pulling resistance is improved; (3) The flanging part can be deformed by the pressure of the injection upper die and the lower die during injection, so that the overflow is prevented from entering the fastener. Drawings The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present utility model, and are not particularly limited. Those skilled in the art with access to the teachings of the present utility model can select a variety of possible shapes and scale sizes to practice the present utility model as the case may be. In the drawings: FIG. 1 is a schematic view of a fastener according to embodiment 1 of the present utilit