High-speed continuous large-capacity take-up production process for small-sized enameled wire

Abstract

The invention relates to a high-speed continuous large-capacity take-up production process for a small-sized enameled wire. The process comprises the following steps: step S1: coarse wire drawing; step S2: intermediate wire drawing and annealing; step S3: coating wire drawing; step S4: coating; in the step S4, the core of a painting mold used for applying the insulating varnish by the painting mold is made of a polycrystalline material; in the step S4, the taper of the leading-out terminal of the painting mold is 7.5 degrees; in the step S4, a baking traction wheel used for baking and a pre-painting branching large guide wheel corresponding to the baking traction wheel are cones, and the cones have a taper of 3.39 degrees. The high-speed continuous large-capacity take-up production processhas the advantage that the mold core of the paint mold is made of the polycrystalline material, so that wear resistance is realized; the taper of the leading-out terminal of the painting mold is 7.5degrees, 3.75-degree swinging is formed between a mold base and the leading-out terminal, which is favorable for an enameled wire to self-center, and reduces the probability of wire disconnection; andthe taper of the baking traction wheel and the pre-painting branching large guide wheel is 3.39 degrees, so that the tension of the enameled wire is constant in the oven, and the doubling and chaoticwires are avoided.

Description

Technical field [0001] The invention relates to the technical field of enameled wires, in particular to a high-speed continuous large-capacity take-up process for small-size enameled wires. Background technique [0002] Small-size enameled wire is an enameled wire with a guide body size of Φ0.10mm~Φ0.30mm. In order to improve production efficiency, customers often use more automated production equipment, requiring enameled wire: 1) Large capacity for take-up and unwinding, and the weight of single-axis enameled wire must be at least 60~90kg; 2) High product performance consistency, so enameled wire production enterprises must It is produced by continuous drawing and coating equipment, and the mold coating process is adopted to achieve the requirements of uniform paint film thickness of the enameled wire and good uniformity of conductor and outer diameter dimensions. At the same time, as the environmental protection pressure increases, the requirements Use paint with low solvent ...

AI Technical Summary

Problems solved by technology

[0003] Due to the thin conductor wire diameter (Φ0.10mm~Φ0.30mm) and high product performance requirements, it is produced by a high-speed continuous drawing and coating machine, using high-solid paint (solid content 45%-51%), and the paint has a high viscosity. (viscosity 4000mpas ~ 9000mpas), under such production process conditions, on the one hand, during the process of mold painting, the line resistance is large when passing through the mold; There is tension control in the wire take-up link. The enameled wire bears a large tensile force and is unstable. The wire breakage phenomenon is very easy to occur during the painting process. Frequent wire breakage cannot continue production, resulting in the weight of the single axis not meeting the customer's requirements. Very high scrap rate

[0004] Due to the limitation of pay-off and take-up machines, the traditional felt production process cannot achieve large-capacity take-up, and the uniformity of paint film thickness cannot be guaranteed. At the same time, only low-viscosity paint can be used

However, the ordinary continuous wire drawing and mold painting production process uses high-solid paint. Due to the high viscosity of the paint, the production of small-sized enameled wires is very easy to break.

The published patent of "New Paint Mold for Enamelling Machine" (publication number CN201562497U) achieves decompression by enlarging the outer diameter of the overflow port of the mold and adding a pressure relief hole, but it is used for high-speed production of small-sized enameled wires Due to the fast line speed, high-speed pressure and running inertia, the paint at the outlet of the pressure relief hole is easy to splash, causing the die to be stuck and broken. It still cannot adapt to the high-speed production of small-sized wires, and cannot meet the requirements of continuous large-capacity and high-speed winding of small-sized enameled wires. need

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