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Extruding forming method for inner lining type metal-plastic composite tube

A technology of extrusion molding and metal plastics, which is applied in the field of polymer material molding processing, can solve the problems of difficult control of process parameters and difficult implementation, and achieve the effects of convenient control, good product quality and high efficiency

Inactive Publication Date: 2005-02-02
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is difficult to implement, and the process parameters are not easy to control

Method used

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  • Extruding forming method for inner lining type metal-plastic composite tube
  • Extruding forming method for inner lining type metal-plastic composite tube
  • Extruding forming method for inner lining type metal-plastic composite tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 200mm outer diameter steel-plastic composite pipe

[0023] Steel pipe outer diameter 200mm, wall thickness 10mm, length 4m

[0024] The raw material of the lining pipe is polyethylene, the thickness is 2mm, and the melting temperature is 180-220°C.

[0025] The extrusion molding device of the lined metal-plastic composite pipe has a simple structure. It only needs to install an extended flow channel (8) on the general-purpose extruder, and use the machine head (7) and the metal pipe (3) to form a tubular die, and melt the material ( 9) Squeeze directly on the inner wall of the metal pipe (3). The machine head (7) is provided with a positioning device (5), the mobile workbench (6) is provided with an end cover (1) and a retaining ring (4), and the end cover is provided with a hot compressed air (steam) inlet (10). A cooling system is also provided on the platform to shape the composite pipe, and the liner (2) is closely attached to the inner wall of the metal pipe to f...

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Abstract

An extrusion moulding technology for lining-type composite metal-plastic pipe includes such steps as loading the particles of engineering plastics in an extruder, heating for fusing them, delivering the fused material to the extruding head positioned in a metal pipe, extruding from tubular die while applying hot compressed air or steam at 80-150 deg.c and 0.1-0.5 MPa, and externally cooling.

Description

1. Technical field [0001] The invention relates to an extrusion molding method for a lined metal-plastic composite pipe, which belongs to the field of polymer material molding processing. 2. Background technology [0002] Lined steel-plastic composite pipe combines the strength of steel pipe and the corrosion resistance and wear resistance of plastic, so it has been widely used in chemical, pharmaceutical, food and other industries. Existing manufacturing method has following three kinds. [0003] 1. Finished plastic pipe lining method The combination method of steel pipe and plastic pipe is to cold draw the steel pipe to make the steel pipe tightly wrap the plastic pipe (patent 99114014); the second is to melt the plastic pipe by heating to adhere to the inner wall of the steel pipe (patent 92100118) The 3rd, plastic pipe is heat-drawn, makes its deformation lining steel pipe, loosens tension then, plastic pipe elastic recovery, lining tight steel pipe (patent 01109004); 4...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/02
Inventor 王勇黄锐
Owner SICHUAN UNIV