Extrusion forming and diameter-setting equipment of steel-plastics composite pipe using perforated steel pipe as skeleton

A steel-plastic composite pipe, extrusion molding technology, applied in the field of sizing devices, can solve the problems of steel-plastic separation, rough inner wall of pipes, etc., achieve the effect of increasing molding speed, improving smoothness, and avoiding sticking

Inactive Publication Date: 2003-04-23
汪兆钧 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, what often happens is: either the inner wall of the formed pipe and the outer wall of the mandrel are not completely fitted, resulting in the separation of steel and plastic; Bonding, so that the inner wall of the pipe is rough
So far, there is no sizing device that can meet the production needs of this kind of pipes and produce qualified high-quality extruded steel-plastic composite pipes.

Method used

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  • Extrusion forming and diameter-setting equipment of steel-plastics composite pipe using perforated steel pipe as skeleton
  • Extrusion forming and diameter-setting equipment of steel-plastics composite pipe using perforated steel pipe as skeleton

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Embodiment Construction

[0016] Referring to the accompanying drawings, this embodiment is composed of an inner sizing mandrel 1 and an outer sizing sleeve 2 . The inner sizing mandrel 1 extends from the extruder head 3 . The outer sizing sleeve 2 is set separately from the extruder head 3 ; the outer sizing sleeve 2 is set on the end of the inner sizing mandrel 1 .

[0017] As shown in the figure, the inner sizing mandrel 1 is a hollow tubular structure.

[0018] The inner cavity of the tubular mandrel 1 has a cooling water circulation channel. In this embodiment, the inlet and outlet nozzles of the cooling water are located at the entry end side of the mandrel 1 , and the inner pipe 7 is arranged in the cavity of the mandrel 1 . The cooling water is introduced from the inner pipe 7 and drawn out along the inner side wall of the hollow mold core 1, and heat exchange is carried out while being drawn out, and the pipe material attached to the outer side wall of the core mold 1 is forced to cool.

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Abstract

The extruding-forming-size equipment of steel-plastics composite pipe using perforated stal pipe as skeleton is formed from internal sizing core die and external sizing sleeve, and it is characterized by that internal sizing core die is extended from extruding machine head, the external sizing sleeve and extruding machine head are separately arranged, and cover-mounted on the end portion of internal sizing coer die, the internal sizing core die is made into a hollow tubular structure, the inner cavity of the tubular core die is a cooling water circulating channel, and its end portion is equipped with a negative pressure cavity whose sid wall is equipped with an air hole.

Description

Technical field: [0001] The invention relates to a sizing device in extrusion molding. Background technique: [0002] The steel-plastic composite pipe with perforated steel pipe as the skeleton has attracted more and more attention due to its advantages such as high strength, good corrosion resistance, light weight, and complete composite of steel and plastic without separation. The production process of this kind of pipe mainly includes three parts, namely, the forming of steel pipe, the compounding of steel pipe and plastic, and the sizing forming after compounding. Among them, the forming of the steel pipe is to make the perforated steel plate into a tubular shape after passing through the pressure rollers with gradually changing diameters, and the steel pipe is formed after welding. Steel-plastic compounding is to pass the steel pipe continuously through the plastic extruder, and use the rotating movement of the screw to pressurize, and continuously extrude the plastici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/02
Inventor 汪兆钧王其凤唐美洁
Owner 汪兆钧
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