Manufacturing method of copper-plastic pipe

Abstract

The invention discloses a manufacturing method of a copper plastic pipe. The copper plastic pipe comprises a copper pipe; the copper pipe is coated with a fiberglass mesh; the outside of the fiberglass mesh is sprayed with high-temperature-resistant epoxy glue; a layer of aluminum tube is arranged outside the copper pipe sprayed with the high-temperature-resistant epoxy glue; a PPR material is formed outside the aluminum tube by injection molding. Thus, the manufacturing method of the copper plastic pipe, which has the advantages of smooth circumferential surface, complete smooth weld joints, heat preservation, large bearing capacity and high injection efficiency, is provided.

Description

technical field [0001] The invention relates to a method for manufacturing a metal composite pipe, in particular to a method for manufacturing a copper-plastic pipe. Background technique [0002] At present, with the advancement of science and technology, the application of copper-plastic pipes has become more and more popular. Copper-plastic pipes are used in both manufacturing and households. Therefore, the demand for copper-plastic pipes in today's market is increasing. [0003] At present, the manufacturing methods adopted by a large number of pipe manufacturing enterprises are: feeding copper strips; forming copper pipes on copper strips by stainless steel automatic pipe making machines; welding the weld seams of formed copper pipes with welding machines; Heat; injecting PPR to the outer wall of the copper pipe, wherein the forming of the copper pipe and the injection molding of PPR on the outer wall of the copper pipe are carried out simultaneously on the same produc...

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Problems solved by technology

[0004] However, during the forming process of the copper pipe, the edge of the copper strip will overlap, which will not only increase the welding thickness, but also cause the outer peripheral surface of the circular copper pipe to be uneven after the welding is completed; at the same time, the copper-plastic pipe used The strip is generally a thin copper strip with a thickness of less than 1mm. Such a thickness makes it difficult to control the parameters of the welding process at an optimal value, which will easily lead to excessive temperature during welding, and further cause the weld formed by the copper strip to be broken down; moreover, the thin copper strip The heat conductivity of the pipe is good, and it will quickly transfer heat to the PPR parts around the copper pipe, which will cause heat loss in the copper pipe, and cause the PPR parts to fail due to thermal expansion and contraction; and, in large quantities During the production process, the molding speed of the copper tube is the same as the speed of the outer layer of the copper tube injection molding PPR, because the defect in the adjustment of the copper tube welding process parameters will cause the speed of the copper tube welding to be slower than the speed of the copper tube injection PPR molding, and then occur The phenomenon that copper tube welding lags behind copper tube injection PPR molding makes the speed of injection PPR unable to reach the maximum value, which reduces the overall efficiency of copper-plastic tube manufacturing; in addition, the thickness of copper strip used in the manufacturing process of copper-plastic tubes is relatively thin , so the hardness of the copper-plastic pipe composed of copper pipe and plastic is relatively weak, resulting in a weak bearing capacity of the copper-plastic pipe

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