Stepped combined winding and socket fitting type structure wall pipe and machining method thereof

Abstract

The invention relates to a composite coiling insert structural wall tube material, which comprises plastic band and large tube molded with steel band, wherein the invention is characterized in that: A, the plastic band is used as base layer to be coiled on the core tube of mould to be adhered and molded; B, one layer of V-shaped steel band is coiled outside the plastic band; C, the steel band is coiled with one layer of plastic band, then online coiling mould core tube which rotates and axially translates, to form large tube. The invention only utilizes present plastic band extruder, with reduced cost, to form the large tube whose two ends are arranged with insert holes.

Description

technical field [0001] The invention relates to a step-by-step compound winding socket-type structural wall pipe, a processing method and a mold, and belongs to the technical field of plastic pipe processing technology and equipment. Background technique [0002] At present, large-diameter plastic pipes belong to chemical building materials. They are replacement products of plastics for steel and plastics for cement. They are used in municipal drainage, long-distance low-pressure water delivery, mine and chemical drainage, farmland water conservancy irrigation and ventilation pipes and chemical containers. It is of great significance to save energy, reduce pollution and protect the environment. At present, the production of this kind of plastic pipe generally adopts a single machine (one extruder) production method, and the plastic pipe used as a winding skeleton is produced by extruding a U-shaped arc belt from a mold and wrapping a polypropylene plastic pipe (referred to a...

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Problems solved by technology

At present, the production of this kind of plastic pipe generally adopts a single machine (one extruder) production method, and the plastic pipe used as a winding skeleton is produced by extruding a U-shaped arc belt from a mold and wrapping a polypropylene plastic pipe (referred to as pp pipe). , through online winding on the polyethylene flat belt as the base pipe as a reinforcing rib, the pipe produced in this way has the following defects: 1. In order to ensure the quality of its products, the flat belt winding base is often designed to be very thick; 2. The diameter of the pp pipe should not be too large, and the size of the skeleton is limited; in order to improve the ring stiffness of the product, foreign countries have used the technology of co-extruding plastic belts and steel belts to process large-diameter pipes. The disadvantages of using this processing method are: 1. Equipment and The molds need to be specially made, and the production equipment is relatively high; 2. The continuous production of large-diameter pipes cannot be equipped with sockets. And reduce manufacturing cost, become the main problem that plagues enterprises

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