Short Fiber Reinforced Plastic Electrofusion Pipe Fitting with Optimized Injection Position and Its Injection Mold

Abstract

The invention relates to the field of thermoplastic electric melting pipes, and aims to provide a short fiber reinforced plastic electric melting pipe with an optimized injection position and an injection mold thereof. The pipe comprises an electric melting pipe body embedded with a resistance wire, wherein two binding posts which are respectively connected to the two ends of the resistance wire are arranged on the electric melting pipe body; the electric melting pipe body is made of thermoplastic plastic filled with short fibers; and the injection position is arranged on any end face of the electric melting pipe, so that the injection molding direction is parallel to the axial direction of the pipe. According to the short fiber reinforced plastic electric melting pipe, the axial orientation degree of the fibers in the electric melting pipe is improved, the problem that the fiber orientation is not ideal in the short fiber reinforced thermoplastic plastic electric melting pipe which isinjected by the electric melting pipe injection mold is solved, and the axial strength of the short fiber reinforced plastic electric melting pipe is improved. The pipe is formed in one step by an injection molding method, and an additional steel plate or a fiber reinforced layer is not needed, so that the manufacturing process is simple, the stability is good, the process cost is reduced, and the defects of bonding in the prior art, ring-only enhancement and the like are overcome.

Description

technical field [0001] The invention relates to the field of thermoplastic electric fusion pipe fittings, in particular to a short fiber reinforced plastic electric fusion pipe fitting with optimized injection position and an injection mold thereof. Background technique [0002] Non-metallic pipes have the advantages of high flexibility, good toughness, corrosion resistance, and long service life, and the energy consumption of the same volume of production is only 1 / 3 to 1 / 4 of that of steel, which is recognized as a "green" pipe. With the adjustment of my country's energy structure and the acceleration of urbanization, non-metallic pipes are widely used in major national projects. In the field of gas, more than 90% of my country's newly laid medium and low-voltage urban gas pipes use polyethylene pipes; in nuclear power plants In the field of non-metallic pipes, non-metallic pipes have begun to be used for cooling water circulation pipes. At present, the peripheral cooling w...

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Problems solved by technology

[0006] The injection position of the injection mold for traditional electrofusion pipe fittings is located on the side of the electrofusion pipe fittings. In the electrofusion pipe fittings obtained by injection molding with traditional molds, the fibers in the electrofusion pipe fittings are mainly oriented in the hoop direction, so that the short fibers can only enhance the hoop strength in the electrofusion pipe fittings. The effect on the axial strength of the electrofusion pipe fittings is not obvious, which is inconsistent with the loading conditions of the electrofusion pipe fittings that mainly bear axial tensile loads in the actual application process

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