A composite insulator manufacturing process

Abstract

The invention relates to a manufacturing process of a composite insulator, which uses an injection molding mold, the injection molding mold includes a base frame, a mounting frame, an upper mold, a lower mold, a lifting cylinder and a vibration mechanism, and the above-mentioned injection molding mold is used to make a composite insulator. The specific process flow of the type insulator is as follows: mandrel forming, mandrel grinding, injection assembly, ejection and demoulding, and shape trimming. The upper mold includes the main body of the upper mold, the upper shaping block and the upper driven gear. The lower mold includes the main body of the lower mold, Lower shaping block, lower driven gear, telescopic cylinder and fixed ring. The invention can drive the rubber material to shake within a certain range during the injection process, ensure the uniform distribution of the rubber material in the mold, avoid defects such as air holes caused by uneven distribution of the rubber material, and can drive the mold through the vibration mechanism to carry out the injection process during demoulding. Vibration achieves the purpose of accelerating the separation speed of the mold and the silicone rubber shed.

Description

technical field [0001] The invention relates to the technical field of electric power accessories, in particular to a manufacturing process of a composite insulator. Background technique [0002] Composite insulators are different from porcelain and glass insulators. They are a new type of insulator with a composite structure, mainly composed of core rods, sheds, sheaths, metal accessories and other parts. Its characteristic is that the mechanical strength and internal and external insulation properties that the insulator should have are allocated to different insulating materials. [0003] In the process of making composite insulators, it is necessary to use the injection molding method to cooperate with the mold to manufacture the insulator shed, but there are still some problems in the process of using the injection molding method to manufacture the insulator shed: [0004] (1) During the injection process, due to the high viscosity and poor flow properties of the rubber...

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Problems solved by technology

[0004] (1) During the injection process, due to the high viscosity and poor flow properties of the rubber material, it is impossible to ensure that the rubber material can be evenly distributed in the mold cavity, and the parts with insufficient distribution of the rubber material will have defects of lack of glue or insufficient strength. Affect the performance of force insulators

[0005] (2) In the demoulding process, the ejector mechanism is often used to directly separate the upper and lower molds. If the ejection force is too large, the silicone rubber umbrella skirt will be torn due to excessive tension. If the ejection force is insufficient, the It is impossible to separate the silicone rubber shed from the mold quickly, and it is difficult to demould

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