CN209943775U

CN209943775U - Secondary forming full plastic three-way joint

Info

Publication number: CN209943775U
Application number: CN201822091890.8U
Authority: CN
Inventors: 印振同; 胡宗义; 宋建清; 王天金
Original assignee: Luyu Plastic Industry Co ltd
Current assignee: Shandong Luyu Plastic Co ltd
Priority date: 2018-12-13
Filing date: 2018-12-13
Publication date: 2020-01-14
Anticipated expiration: 2028-12-13

Abstract

The utility model provides a secondary forming plastic tee joint, wherein the inner surface and the outer surface of an insert 1 are provided with textures 2, the textures 2 are concave-convex textures, a melt is formed in the concave-convex textures through one-time injection molding, and a body is formed outside the textures 2 through secondary injection molding; has the advantages that: the insert of the utility model eliminates the defects of the tee joint at the injection sprue part and the melt fusion part, and the pressure-bearing capacity is greatly increased; the surface of the insert is designed with textures, the textures are adapted to the flow condition of a melt during injection molding, rapid filling can be realized, gas in a mold cavity can be discharged conveniently, and after secondary injection molding, the insert is tightly combined with the body to form a product with a compact structure and reliable quality.

Description

Secondary forming full plastic three-way joint

Technical Field

The utility model belongs to the technical field of the tee bend and specifically relates to an all-plastic tee bend of post forming.

Background

Plastic tees are an important part in pipe connections, which are often used in pipeline branch connections. The stress concentration phenomenon exists at the corner of the intersection line of the tee joint due to the discontinuity of the geometric shape of the tee joint.

The plastic tee joint is generally produced by adopting an injection molding process, and the flow characteristic of molten plastic greatly influences the mechanical property of the tee joint during injection molding. In order to obtain a tee joint with a required structural size, an injection molding sprue is generally arranged at a junction of intersecting lines of the tee joint, so that molten plastic can be uniformly injected to three pipe ends of the tee joint, the three pipe ends can easily reach the expected structural size, but the sprue forms a junction of molten materials at another junction of intersecting lines of the tee joint to form a weak point, and the weak point can cause the reduction of the pressure bearing capacity of the tee joint. The injection gate site also creates a defect point due to stress concentration caused by the injection process.

Disclosure of Invention

The utility model aims to solve the defects of the prior art and provide a secondary forming full-plastic tee joint.

The utility model discloses new technical scheme is: the secondary forming all-plastic tee joint comprises an insert, textures and a body, the inner surface and the outer surface of the insert are provided with the textures, the textures are concave-convex textures, a melt is formed in the concave-convex textures through one-time injection molding, and the body is formed outside the textures through secondary injection molding.

The insert is a smooth transition surface.

The insert is a right-angle transition surface.

The insert and the body are made of plastic.

The utility model has the advantages that: the insert of the utility model eliminates the defects of the tee joint at the injection sprue part and the melt fusion part, and the pressure-bearing capacity is greatly increased; the surface of the insert is designed with textures, the textures are adapted to the flow condition of a melt during injection molding, rapid filling can be realized, gas in a mold cavity can be discharged conveniently, and after secondary injection molding, the insert is tightly combined with the body to form a product with a compact structure and reliable quality.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Wherein: insert 1 and texture 2.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The secondary forming all-plastic tee joint comprises an insert 1, textures 2 and a body, wherein the textures 2 are arranged on the inner surface and the outer surface of the insert 1, the textures 2 are concave-convex textures, a melt is formed in the concave-convex textures through one-time injection molding, and the body is formed outside the textures 2 through secondary injection molding.

The insert 1 is a smooth transition surface.

The insert 1 is a right-angle transition surface.

The insert 1 and the body are made of plastic.

Firstly, producing an insert 1 by one-time injection molding, and then installing the insert 1 on a mold core of a mold; and performing secondary injection molding, and completely wrapping the insert 1 in the body to form a tee joint with a compact structure, wherein the intersecting line region has no melting material combined weak point and an injection molding pressure maintaining stress concentration point.

Claims

1. The all-plastic tee joint of secondary molding includes inserts (1), texture (2) and body, its characterized in that: the insert is characterized in that the inner surface and the outer surface of the insert (1) are provided with textures (2), the textures (2) are concave-convex textures, a melt is formed in the concave-convex textures through one-time injection molding, and a body is formed outside the textures (2) through two-time injection molding.

2. The overmolded all-plastic tee of claim 1, wherein: the insert (1) is a smooth transition surface.

3. The secondary forming all-plastic tee joint of claim 1 or 2, wherein: the insert (1) is a right-angle transition surface.

4. The overmolded all-plastic tee of claim 1, wherein: the insert (1) and the body are made of plastic.