Polycrystalline painting die with function of automatic center calibration

Abstract

The invention relates to a polycrystalline painting die with the function of automatic center calibration. The die is composed of a sintering body and a die sleeve. A pipe cavity connecting openings at the two sides of the die sleeve is arranged in the die sleeve; an annular positioning slot is formed in the lower-side pipe body of the die sleeve; and an empty part for accommodating and fixing thesintering body is formed in the upper side of the pipe cavity of the die sleeve. The sintering body consists of a polycrystalline die core and sintered powder; the sintered powder is embedded and fixed in the empty part; a painting hole that penetrates the die core vertically and is communicated with the pipe cavity is formed in the polycrystalline die core; and a through hole cooperating with the painting hole is formed in the sintered powder. The painting hole includes a sizing area; and the apertures of the parts, except the sizing area, of the painting hole are different along the centralaxis direction. The painting die is concentric with an enamelled wire all the time when working to ensure painting film uniformity of the enamelled wire; the die has advantages of good coating effectand smooth film surface; the consistency and stability of the electrical and mechanical performances of the enamelled wire are ensured effectively; and the product quality is improved.

Description

technical field [0001] The invention belongs to the technical field of preparing paint moulds, in particular to a polycrystalline paint mould, which automatically calibrates the center. Background technique [0002] Since the application of mold method painting in the 1980s, natural diamond paint molds, tungsten steel paint molds and ruby ​​paint molds have been used in mold method painting. Due to size limitation, natural diamonds can only process small-scale painted molds (mold specification <0.800mm), while large-scale painted molds (mold specification ≥0.800mm) use tungsten steel and ruby ​​as core materials. Tungsten steel and ruby ​​have become the mainstream products for painted molds due to their simple processing, good surface roughness and high production efficiency. [0003] Due to poor wear resistance of tungsten steel and ruby ​​lacquered molds, when used for a long time, the molds will inevitably have large specifications, grooves on the surface of the mold...

AI Technical Summary

Problems solved by technology

[0003] Due to poor wear resistance of tungsten steel and ruby ​​lacquered molds, when used for a long time, the molds will inevitably have large specifications, grooves on the surface of the mold holes, and large ellipticity. Paint tumors are prone to appear in the process of painting electromagnetic wires. , paint deviation, uneven paint layer, and unqualified paint film thickness. At the same time, due to the single processing method of tungsten steel paint mold holes and the difficulty of accurately controlling the hole diameter, hole shape, concentricity and other factors, it has been used in high-end electromagnetic wire production. There are various unfavorable factors, such as finished wire paint deviation, low voltage resistance, poor adhesion, etc., which hinder the consistency and stability of the electrical and mechanical properties of the electromagnetic wire, and seriously affect the product quality of the enterprise.

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