Plastic pipe fitting with plastic-steel composite reinforced threaded insert and its production process

Abstract

The invention belongs to the technical field of plastic fittings, and particularly relates to a plastic fitting with a plastic-steel composite reinforced thread insert and a production process of the plastic fitting. The plastic fitting comprises an internal thread bushing or an external thread bushing, a plastic-coated reinforced bushing is formed outside the internal thread sleeve to form a composite reinforced internal thread insert, or a plastic-filled reinforced bushing is formed in the external thread bushing to form a composite reinforced external thread insert, and a fitting connecting portion is arranged on one side of the internal thread insert or the external thread insert by injection molding to form the plastic fitting. The plastic fitting is long in service life, environment friendly, safe and reliable, and production cost is reduced.

Description

Technical field: [0001] The invention belongs to the technical field of plastic pipe fittings, in particular to a plastic pipe fitting with a plastic-steel composite reinforced thread insert and a production process thereof. Background technique: [0002] There are different connection methods between plastic pipe networks. In order to adapt to the connection occasions of different purposes, different specifications and different interfaces, a large number of screw connection methods that are convenient for assembly, disassembly, replacement and inspection and maintenance are used. At present, in order to achieve the strength, precision, sealing and life of the thread of the threaded plastic pipe fittings, instead of directly molding the plastic thread on the plastic pipe fittings, the copper thread with higher strength, precision, sealing and life than plastic is used. The material is processed into a threaded insert, and the threaded plastic pipe fitting is manufactured by...

AI Technical Summary

Problems solved by technology

[0003] 1. The forging process (commonly known as red punching) has high energy consumption, high operating environment temperature, high labor intensity of workers, continuous production of each single piece, and low efficiency

[0004] 2. Machining copper materials will produce cutting dust particles, which are harmful to the human body, and the continuous production of each single piece is low in efficiency

However, the electroplating process consumes a lot of energy and causes serious environmental pollution.

[0006] 4. The linear expansion coefficient and thermal conductivity of the polymer material at the connection between the copper material insert and the pipe fittings are very different. Due to the change of the ambient temperature, there will be slack and gaps in the tightly coated bonding interface, resulting in Pressure and high temperature fluid leakage, although the sealing structure and seals are added, there are still hidden dangers of unsafety and short life, and at the same time increase the cost of maintenance and replacement

[0007] 5. Copper material is used as the insert, its strength-to-weight ratio is small, material consumption is large, resources are not saved, and material costs and sorting and recycling costs are high

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