Method for Preparing Corona-resistant Enameled Wire and Product

Summary of the invention

The object of the invention is exactly to the existing existing deficiency of the magnet wire insulation of anti-the corona, and a kind of preparation method and product of the enamelled wire of anti-corona the newly is provided, and not only tack is good for the enamelled wire of producing according to this method of anti-the corona, and corona-resistance property is high; Can be used for the variable-frequency motor winding, not only can improve corona-resistance property greatly, and be easy to the advantage of suitability for industrialized production in addition.
For realizing above-mentioned purpose, the concrete technical scheme that the present invention adopts is: a kind of production method of the enamelled wire of anti-the corona, and this method may further comprise the steps: wire drawing; Unwrapping wire; Clean; Annealing; Cooling; Paint, cure; Lubricated; Take-up.With bare wire surface-coated 4 road resistant polyester corona lacquers, apply the anti-corona lacquer of 7 road polyester-imides more earlier, apply 2 road polyamidoimide lacquers at last, cure, cool off after the per pass japanning, descend japanning together again.Pass through the upper strata from baker lower floor when curing, 155 ± 5 ℃ of baker inlet temperatures, 260 ± 5 ℃ of baker lower floor temperature, temperature is 370 ± 5 ℃ before the catalysis, and the supplementary heating temperature is 470 ± 5 ℃ after the catalysis.

Concrete manufacture method includes following steps:
(1) wire drawing: at first with the low-oxygen copper pole of Φ 8.00mm at the semi-finished product bare wire that big wire-drawing equipment top La Bian is annealed into Φ 2.90mm, on Medium drawing mach ine, pull into the bare copper wire that requires specification again;
(2) unwrapping wire: the bare copper wire that is up to the standards is placed pay off rack porcelain ring vertical lower, adopt the Brush type unwrapping wire;
(3) clean: bare copper wire is caused clean the water tank place, clean up with the greasy dirt of the rinse water of handling well with the bare copper wire surface;
(4) annealing: cleaned bare copper wire is annealed from the annealing furnace upper strata through lower floor by certain speed of a motor vehicle; Annealing furnace upper strata temperature is 550 ± 5 ℃; 560 ± 5 ℃ of lower floor’s temperature; Water in the annealing tank is necessary for deionized water, otherwise the impurity in the water can make the unclean influence japanning of lead, can’t form smooth paint film;
(5) cooling: the line with cooling blower cooling is come out in the annealing furnace makes it meet the requirements of temperature;
(6) paint, cure: with bare copper wire surface-coated 4 road resistant polyester corona lacquers, adopt the japanning mould to apply successively, earlier by forming resistant polyester corona insulating barrier behind the road baking-curing; Apply the anti-corona lacquer of 7 road polyester-imides again, adopt the japanning mould to apply successively, by forming polyester-imide corona-resistant insulation layer behind the road baking-curing; Apply 2 road polyamidoimide lacquers at last, adopt the japanning mould to apply successively, by forming the polyamidoimide insulating barrier behind the road baking-curing, the final enamelled wire of anti-corona that forms with three insulation layer structures.Cure, cool off after the per pass japanning, descend japanning together again.The circularity of japanning mould endoporus will be got well, and the mould bases that is used to put mould should be able to guarantee that mould can move freely up and down, can make so just that insulating varnish is well-proportioned to be coated on the copper cash, the uniformity of the film thickness of the enamelled wire that guarantees to produce;
Pass through lower floor, 155 ± 5 ℃ of baker inlet temperatures, 260 ± 5 ℃ of baker lower floor temperature from baker lower floor when curing; Temperature is 370 ± 5 ℃ before the catalysis, and the supplementary heating temperature is 470 ± 5 ℃ after the catalysis, major cycle blower fan 1200r/min; Waste discharge blower fan 980r/min, following fire door blower fan 740r/min;
(7) lubricated: as, to make that enamelled wire ability winding displacement when take-up is tight and make things convenient for user’s coiling with enamelled wire surface-coated layer of surface lubricant;
(8) take-up: will produce good enamelled wire on the take-up reel of client’s defined.
The enamelled wire of producing according to said method of anti-the corona is a kind of enamelled wire of anti-corona the with composite insulation layer, and the center of the enamelled wire of anti-the corona is a copper core, outside copper core, is coated with resistant polyester corona insulating barrier; Outside resistant polyester corona insulating barrier, be coated with polyester-imide corona-resistant insulation layer again; Polyester-imide corona-resistant insulation layer also is coatesting.

From: CN101958158A