Production system for polyethylene glass fiber winding structured wall pipe products and production method

Abstract

The invention relates to a production system for polyethylene glass fiber winding structured wall pipe products. The production system comprises a flaky inner wall layer strip extrusion unit and a tubular outer wall layer strip extrusion unit; the flaky inner wall layer strip extrusion unit comprises a first double-screw extruder, a first single-screw extruder and a flaky strip extruder head; thefirst double-screw extruder is provided with a main feed port and a side feed port; discharge ports of the first double-screw extruder and the first single-screw extruder are connected to a first runner port and a second runner port of the flaky strip extruder head through runners; the tubular outer wall layer strip extrusion unit comprises a second double-screw extruder, a second single-screw extruder and a tubular strip extruder head; the second double-screw extruder is provided with a main feed port and a side feed port; and discharge ports of the second double-screw extruder and the secondsingle-screw extruder are connected to a first runner port and a second runner port of the tubular strip extruder head through runners. The production system can effectively improve the mixing uniformity of glass fiber materials, and improves the product rigidity.

Description

technical field [0001] The invention relates to the technical field of plastic pipe processing, in particular to a production system and a production method of polyethylene glass fiber winding structural wall pipes. Background technique [0002] In urban drainage projects, more and more plastic pipes are used. In order to improve the performance of resisting external pressure and impact, different forms of reinforcing ribs are arranged on the outer periphery of the pipe wall. There are two main types: one is double-wall corrugated pipe, the most representative of which is direct extrusion molding; the other is double-wall pipe and polyethylene winding structural wall pipe, which is represented by spiral winding. [0003] Polyethylene winding structural wall pipes are widely used for their excellent performance. The polyethylene winding structure wall pipe is a kind of thermal process winding pipe with high density polyethylene resin as the main raw material. Special struc...

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Problems solved by technology

[0004] When producing high-rigidity pipes, especially large-diameter pipes, the following methods must be adopted: one is to increase the number of layers of winding solid-wall pipes, that is, to increase the thickness of the flat material belt; the other is to increase the number of layers of winding skeleton pipes; the third is to increase the number of skeletons The diameter of the tube; the fourth is to increase the thickness of the material belt covering the skeleton tube to meet the requirements of the product design ring stiffness. The disadvantages are that the consumption of raw materials is large, the winding time is long, the product is heavy and the cost is high; the fifth is to use polyethylene glass fiber winding structural wall tubing

[0005] In the existing polyethylene winding structure wall pipe, the mixing method of the polyethylene raw material and the glass fiber material is a pre-mixing method. The two raw materials are stirred and mixed in the mixing device, and then fed to the extruder for extrusion. The problem of uneven mixing of glass fiber materials leads to local excessive glass fiber content and local insufficient glass fiber content in molten polyethylene material after extrusion, which affects the performance of the product

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