Production method of fuel pump plastic part with metal insert

Abstract

The invention provides a production method of a fuel pump plastic part with a metal insert. The production method comprises the following steps: (1) degreasing a to-be-inserted metal insert; (2) respectively preheating the metal insert, a utilized injection mold and utilized plastic particles; (3) putting the metal insert into the injection mold after the preheating processes, injecting the plastic particles, and carrying out injection molding to form an injection molding member containing the metal insert; (4) tempering the injection molding member; (5) after the tempering process, carrying out turning and milling machining so as to finally form the plastic part with the metal insert. The plastic part produced by the production method cannot crack and lose the efficacy after being subjected to high and low temperature cycling shock tests and an endurance test.

Description

technical field [0001] The invention relates to the technical field of production of plastic parts of an oil pump, in particular to a method for producing plastic parts of an oil pump with metal inserts. Background technique [0002] When producing automotive oil pumps, many plastic parts with metal inserts are required, and these plastic parts are generally used as moving function parts. The plastic materials used for these plastic parts are: polyethersulfone KR4113, PESU-(CF10+C10+PTFE10) from BASF in Germany and polyethersulfone LUVOCOM1100-8549 from LEHVOSS in Germany, PES mit62% (CF, C, PTFE) , which is characterized by high rigidity, good wear resistance, high temperature resistance, and corrosion resistance, but the manufacturing process is complicated, especially when steel parts are used as inserts, and two materials with different properties are combined for injection molding and gold processing, which is quite difficult. . If not properly controlled, injection m...

AI Technical Summary

Problems solved by technology

The plastic materials used for these plastic parts are: polyethersulfone KR4113, PESU-(CF10+C10+PTFE10) from BASF in Germany and polyethersulfone LUVOCOM1100-8549 from LEHVOSS in Germany, PES mit62% (CF, C, PTFE) , which is characterized by high rigidity, good wear resistance, high temperature resistance, and corrosion resistance, but the manufacturing process is complicated, especially when steel parts are used as inserts, and two materials with different properties are combined for injection molding and gold processing, which is quite difficult.

If not properly controlled, injection molded parts with inserts are prone to shrinkage and air bubbles on the inner wall, and even cracks in durability tests and high and low temperature impact tests

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