Forming technology for steel-plastic composite high-pressure-resistant type PE electric melting pipe fitting of secondary injection moulding forming

Abstract

The invention discloses a forming technology for a steel-plastic composite high- pressure-resistant type PE (Poly Ethylene) electric melting pipe fitting of secondary injection moulding forming. The forming technology has the specific procedures: 1, allowing the surface of a stainless steel sleeve to be subjected to degreasing processing, and then putting into a die I, after the sleeve is heated to the temperature of 100 DEG C, pouring PE hot melt adhesive into the die I by an injection machine to completely cover the stainless steel sleeve; 2, putting a combined unit into a drying oven of the temperature of 105 DEG C for preheating, taking out, putting into a die II, and performing injection moulding forming of a PE main body part; 3, allowing the processed combined unit to be subjected to state adjustment for at least half moth under the nature state; 4, forming an opening on the inner surface of the combined unit in a spiral line manner, embedding resistance wires in the opening, and flattening the inner surface; 5, mounting copper electrodes in electrode holes at two ends of the qualified product. The forming technology greatly improves the bearing capacity of the plastic pipe and realizes favorable welding performance of the pipe.

Description

Technical field [0001] The invention relates to a pipe fitting, in particular to a connection of polyethylene (PE) pipes mainly used in the field of 2.5MPa high pressure oil, gas, water supply and other fluid transportation, and a new type of polyethylene and steel processed by two injection molding Set of composite electric fusion pipe fittings. Background technique [0002] With the rapid progress of urbanization in my country and the continuous improvement of energy and environmental protection requirements, polyethylene (PE) and other plastic pipes have replaced traditional plastic pipes due to their excellent anti-corrosion, environmental protection, easy construction, and reliable performance. The metal pipes are widely used in the fields of water supply, drainage, gas and other fluid transportation pipelines. However, because the overall strength of plastic pipes is not as good as that of metal pipes, metal pipes are usually still used in medium and high pressure fluid del...

AI Technical Summary

Problems solved by technology

However, due to the limitations of the structure and molding methods, the matching plastic pipe fittings are difficult to achieve the same pressure level as the pipe, which has become a bottleneck in the popularization and application of plastic high-pressure pipes.

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