Method for manufacturing insulated wire

Patent metadata

Field	Value
Publication number	US-9697932-B2
Application number	US-201414156822-A
Country	US
Kind code	B2
Filing date	Jan 16, 2014
Priority date	Jan 16, 2013
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

There is provided a method for manufacturing an insulated wire, including at least: coating an outer periphery of a running wire with an insulation coating material discharged from a coating material discharging tank; baking the insulation coating material by an incinerator, the insulation coating material being used for coating the outer periphery of the running wire; and cooling the running wire by a cooling mechanism so that a temperature of the running wire before being coated with the insulation coating material, is a specific temperature, based on a temperature of the running wire detected by a temperature detector, wherein the coating, the baking, and the cooling are repeated.

First claim

What is claimed is:

1. A method for manufacturing an insulated wire, the method comprising at least:
a) coating an outer periphery of a square running wire, obtained by running a conductor which is rectangular in cross section, with a liquid insulation coating material having a predetermined viscosity range by introducing the square running wire into the liquid insulation coating material stored in a coating material supply tank;
b) baking the liquid insulation coating material coated in coating on the outer periphery of the square running wire;
c) cooling the coated wire which has been heated during baking;
d) adjusting the cooling based upon detecting a temperature of the square running wire using a temperature detector positioned on an upstream side of the coating material supply tank before it is reintroduced into the liquid insulation coating material stored in the coating material supply tank to prevent heat from the baked wire from changing viscosity of the liquid insulation coating material outside the predetermined viscosity range, wherein the predetermined viscosity range is determined within the coating material supply tank and is between 5900 mPa·s or more and 6600 mPa·s or less wherein the square running wire is run so that V×D is 15 or more and 60 or less, V being a running speed of the square running wire in meters per minute and D being a diameter in millimeters of a circle having a same sectional area as a sectional area of the conductor; and
e) repeating (a)-(d).

2. The method of claim 1 , wherein a time for the baking is 5 seconds or more and 100 seconds or less.

3. The method of claim 1 , further comprising adjusting an amount of the liquid insulation coating material coated on the outer periphery of the square running wire by introducing the square running wire coated with the liquid insulation coating material into a coating die prior to baking.

4. The method of claim 1 , wherein a temperature for the baking is 250° C. or more and 600° C. or less.

5. The method of claim 1 , wherein the predetermined viscosity range enables formation of a uniform thickness of the coating at the running speed.

6. The method of claim 1 , wherein a final insulated coating thickness is 50 μm or less.

7. The method of claim 1 , wherein the liquid insulating coating material is selected from the group consisting of resin containing polyimide, polyamide imide, polyester, imide, polyamide, polyester, polyurethane, polyether, polyether ketone, polyphenyl sulfide, and phenoxy resin.

8. The method of claim 1 , wherein the conductor is run at a speed of at least 10 m/min.

9. The method of claim 1 , wherein cooling the square running wire coated with the liquid insulation coating material includes using a cooling mechanism including a blower.

Assignees

• Hitachi Metals Ltd

Inventors

• Funayama Yasuhiro
• Watanabe Yosuke

Classifications

• H01B13/145

  Pretreatment or after-treatment · CPC title

• H01B13/065 Primary

  Insulating conductors with lacquers or enamels · CPC title

• H01B13/14

  by extrusion {(extrusion in general B29C48/00)} · CPC title

• H01B13/24

  by extrusion {(extrusion of cables with plastic material in general B29C48/15)} · CPC title

• H01B13/16

  by passing through or dipping in a liquid bath; by spraying · CPC title