Production technology of compound enamelled round aluminium wire with high heat resistance

Abstract

The invention relates to a production technology of an enamelled wire, in particular to a production technology of a compound enamelled round aluminium wire with high heat resistance. Compared with the prior art, aluminum conductor surface is sprayed with 142 solvent before being painted with primer and finish paint except being washed with water to rewash residual aluminum powder, carbon depositor oil stain on the aluminum conductor surface, thus ensuring the cleanliness of the aluminum conductor surface; after annealing, the aluminum conductor is directly discharged into air by a big idlerpulley for naturally cooling without being cooled by cooling water and dried by a drying air duct, which prevents the tiny porcelain eye of the drying air duct from scraping the aluminum conductor surface, ensures the fineness of the aluminum conductor surface, improves paint film adhesiveness after coating, improves thermal shock, cut-through resistance and wire diameter uniformity and greatly lowers wire disconnection ratio in the production process; in addition, the invention lowers painting times, increases yield of unit time, effectively improves production efficiency and lowers production cost.

Description

technical field [0001] The invention relates to a production process of an enameled wire, in particular to a production process of a high heat-resistant composite enamelled round aluminum wire (polyamide-imide composite polyesterimide enamelled round aluminum wire). Background technique [0002] In recent years, polyamide-imide composite polyesterimide enamelled aluminum round wire (composite enamelled aluminum round wire: 1EI / AIWCA for short) has been widely used in high-voltage transformers for microwave ovens, and its heat resistance class is usually 200 and 220 grade, but usually cannot reach the heat resistance grade of 240 grade. As customers put forward higher requirements for the high temperature and high voltage resistance of transformers and the economy of transformers, microwave oven transformers began to phase out old transformers. The new design requires reducing the amount of steel sheets used, and the thermal shock performance of enameled wires must meet the f...

AI Technical Summary

Problems solved by technology

This thermal shock test condition is almost higher than the thermal shock requirements of 240-grade single-coated polyimide enameled wire, and the existing production process for producing heat-resistant grade 200 and 220 enameled aluminum wire cannot meet the requirements Customer's enameled wire thermal shock performance requirements