Method for manufacturing upper outlet insert of solid-sealed pole

The solid-sealed pole is a solid-sealed vacuum interrupter. The vacuum interrupter and the upper and lower outlets are integrally cast with epoxy resin and packaged as a whole piece, which is a major advancement in the insulation technology of vacuum circuit breakers.

Epoxy resin composite for encapsulation is a kind of thermosetting polymer material, which will produce great destructive internal stress during the thermosetting and molding process. The existence of internal stress will cause the solid-sealed pole to appear during storage and use. Cases such as warpage, deformation, cracking, etc. of the solid-sealed pole outsourcing insulation layer, and the solid-sealed pole has occasionally caused failures during more than ten years of fixed operation. Moreover, the proportion of failures in the outlet of the solid-sealed pole is relatively high, so it is necessary to improve this problem.

The outlet wire of the solid-sealed pole metal insert is buried in the epoxy material, and the internal stress generated during solidification and cooling has not been released. What is more prominent is that the upper outlet wire buried in it is of relatively large quality. , And the outer encapsulation epoxy material is not very thick. The thermal expansion coefficients of metals and insulating materials are different, and the internal stress caused by inconsistent shrinkage is more prominent.

Taizhou Tongren Electric Co., Ltd. (a manufacturer of conductive parts) was established in February 2008 and is located in Yanpan Industrial Zone, Qianjiang Town, Yuhuan City, Zhejiang Province. It is a private enterprise that produces and sells switches, electronic components, and electrical accessories. The company covers an area of 8,620 square meters and currently has more than 110 employees, including 4 technicians and 8 quality inspectors.

The company currently has a registered capital of 5 million yuan. Under the leadership of the company’s legal representative Lin Renyun, the company continues to introduce advanced production and testing equipment (CNC machining centers, CNC lathes, CNC drilling centers, milling machines, punching machines, pipe bending machines, etc.). Product quality is strictly controlled. The current product quality has passed the ISO9001: 2015 quality management system, and has been well received by Shanghai Leibosi Electric Co., Ltd., China Zhenhua Electronics Group Yuguang Electric Co., Ltd. (state-owned factory 771), and Beijing ABB , Xiamen ABB, McAudi (Xiamen) Electric Co., Ltd. and other well-known companies.