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Method for manufacturing electrothermal smelting tube with reinforcing structure

A technology that enhances the structure and manufacturing method, and is applied in the direction of pipes/pipe joints/fittings, pipe connection layout, mechanical equipment, etc., and can solve problems such as waste products, non-porous metal plates that cannot be used, and problems that affect the quality and appearance of pipe fittings

Inactive Publication Date: 2003-01-15
蒯一希
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice, it is found that the problem with this manufacturing method is that since the injection molding is completed at one time, during the injection molding process, the skeleton that has been placed in the cavity is easily impacted by the high-pressure and high-speed flowing molten fluid. Displace or deform it, and even expose part of the skeleton, resulting in waste
At the same time, since the fixing nails of the metal skeleton are in direct contact with the cavity of the mold, after the pipe fittings are formed, the fixing nails are exposed on the outer surface of the pipe fittings, which also affects the quality and appearance of the pipe fittings
In addition, when the one-time injection molding method is used at present, the reinforcement used can only be a monolithic metal skeleton with holes, and non-porous metal plates and various forms such as steel wire, glass fiber wire, glass fiber cloth, and metal strips cannot be used. Reinforcement Tape and Wire

Method used

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  • Method for manufacturing electrothermal smelting tube with reinforcing structure
  • Method for manufacturing electrothermal smelting tube with reinforcing structure
  • Method for manufacturing electrothermal smelting tube with reinforcing structure

Examples

Experimental program
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Effect test

Embodiment 1

[0016] First of all, adopt a mold core with a tapering half angle of 1° to 3° at both ends along the axis of the pipe fitting. According to the conventional method, the inner diameter is equal to the inner diameter of the finished product after the first injection molding, but the outer diameter and length are respectively smaller than the finished product. The outer diameter and length of the pipe fitting semi-finished structure 1. On the inner wall surface of the semi-finished pipe structure 1, there is a heating wire 3 that is electrically connected to the two terminals 2, and the two terminals 2 pass through the terminal holes 6 at the corresponding positions and are fixed; the semi-finished structure 1 of the pipe is also equipped with Two inspection holes 4 with larger diameters are reserved. During this process, the mandrel of the pipe fitting mold that forms the pipe fitting inner wall wound with the heating wire 3 is not drawn out until the finished pipe fitting is co...

Embodiment 2

[0018] Firstly, the metal plate is made into an integral cylindrical reinforced skeleton layer 5 whose surface has been pre-coated with a polymer binding interface layer, and is directly clamped in the mold cavity with the current conventional support structure and method, so that the whole The outer wall of the metal cylindrical skeleton layer 5 is close to the inner cavity of the mould, so that after the integral metal cylindrical skeleton is positioned reliably, the first injection molding is carried out to produce a pipe fitting semi-finished structure 1 in the form of the above example. The difference is that after the first injection molding is completed, an integral reinforcing layer 5 of the metal cylindrical skeleton is embedded and fixed at the outer wall of the semi-finished pipe structure 1 at the same time. Then, perform the second injection molding in the same manner as the previous example to form an outer injection layer 7 structure that is wrapped in the outer ...

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Abstract

A technology for making the electrosmelting pipe with reinforcing structure includes such steps as injecting moulding with mould to obtain a semifinished pipe with the electrothermal resistance wire in the inner surface and connected to binding posts and the smaller external diameter and length, arranging the reinforcing structure layer on its external surface, and injecting moulding again to obtain finished protect. Its advantages are high rate of finished products (more than 95%) and long service life.

Description

technical field [0001] The invention relates to a manufacturing method of an electric heating fusion pipe fitting with a reinforced structure used for connecting plastic pipes. Background technique [0002] With the increasingly widespread use of plastic pipes based on polyethylene, polypropylene, etc., the electrothermal fusion pipe connectors used to connect such pipes or pipes are also continuously developed. The basic structure of this type of electric heating pipe connector is that the inner wall surface has a thermal fusion structure such as an electric heating wire that maintains electrical connection with the terminal and can be connected with an external power supply. and other auxiliary structures. In order to solve the problem of low impact resistance and compressive strength of such electric melting pipe fittings made of a single plastic material, and improve its compressive and tensile strength, a reinforced structure such as organic fiber silk layer or mesh la...

Claims

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Application Information

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IPC IPC(8): B29C45/14B29C63/34F16L47/03
Inventor 蒯一希
Owner 蒯一希