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

A production process and high heat-resistant technology, applied in the direction of electrical components, circuits, conductor/cable insulation, etc., can solve the problems of high thermal shock requirements and inability to meet the thermal shock performance of enameled wires, so as to improve thermal shock performance and improve thermal performance. Impact, smooth finish effect

Active Publication Date: 2010-03-10
广州万宝漆包线有限公司
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  • Abstract
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  • Application Information

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

Method used

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Embodiment Construction

[0017] Specific embodiments of the present invention will be further described in detail below.

[0018] In the present invention, a round aluminum rod with a nominal diameter of 9.500 mm is selected, the insulating paint solvent is 142 solvent, its main components are cresol and xylene, the primer is polyesterimide or heat-resistant polyester, and the top coat is polyamide imide paint. Production technique of the present invention comprises the steps:

[0019] 1) After stretching a 9.500 mm round aluminum rod on a wire drawing machine for several times, it is drawn into an aluminum round conductor with a nominal diameter of 2.500 to 0.150 mm. In this embodiment, the wire drawing lubricant used in the wire drawing process is based on A wire drawing lubricant made of 50-60% edible rapeseed oil and 40-50% diesel oil. The surface of the aluminum conductor drawn by this wire-drawing lubricant is smooth and clean, and there is less oil and aluminum powder adhesion; the upper and l...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B13/16
Inventor 李会文
Owner 广州万宝漆包线有限公司
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