Abstract:
PROBLEM TO BE SOLVED: To provide a magnet wire in which defects such as blow-holes in a resin coating layer are reduced by optimizing a rake angle of cutting edge of peeling die used for skin peeling process. SOLUTION: In the manufacturing method of copper wire for magnet wire, cast wire material 18 is produced by continuously pulling up molten copper, and then the cast wire material 18 is subjected to the skin peeling process using a die 21 to obtain the copper wire material for magnet wire. The rake angle of cutting edge 24 of die 21 is set at 20-35° and resin coating layer of polyimide or polyamideimide with high adhesiveness is formed on the obtained core wire. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a copper wire for a magnet wire and a method for producing a copper wire for a magnet wire which can obtain a copper wire (rough drawn wire) for a magnet wire of high quality having excellent machinability and easily subjected to a peeling process, and in which defects such as fogging are hard to be induced upon a peeling process, and, by the effective peeling process therefor, defects remaining in the surface are reduced, and the generation of defects such as blister in insulation coating is reduced upon insulation coating. SOLUTION: According to an upward drawing continuous casting method (up-casting method), to the molten metal of copper or a copper alloy, casting is started at 1,100 to 1,200°C, and the casting is performed at a casting rate of 4 to 5m/min to produce a base wire (rough-drawn wire) of copper or a copper alloy in which the average crystal grain size of a columnar structure 3 composing the surface 2 is 200 to 300 μm. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an evaluation method of a press molding resistance of an insulated wire having an excellent reproducibility at a press-molding time and an evaluation device of the press molding resistance. SOLUTION: The evaluation device 1 of the press molding resistance includes: a grooved tapered plate 5 having a groove 4 capable of partially holding an insulated wire 3 on a tapered face 2; an opposing tapered plate 7 having a tapered face 6 opposite to the tapered face 2 of the grooved tapered plate 5; and a slippage control member 9 contacting a vertical face 8 opposite to the grooved tapered plate 5 of the opposing tapered plate 7. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide insulated wire high in initial adhesion properties and low in adhesion property drop after heat deterioration, and to provide a manufacturing method thereof. SOLUTION: A conductor 2 is coated with a film 3 made of an azole silane compound, the outer periphery of the film 3 is coated with enamel coating made of a resin composition containing either one of polyester imide, polyamide imide, polyimide, polyester, and polyurethane, and the enamel coating is baked to form an insulating film 4. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a self-lubricating enamel wire and a coating material having excellent lubrication property, wear resistance, and adhesion property with treating varnish. SOLUTION: This self-lubricating enamel wire has, on its circumference, a lubrication layer 3 formed by being applied to a surface of a conductor 1 through an insulation layer 2, and baked. The lubrication layer 3 comprises, in 100 pts.wt. of polyamide resin, 1-10 pts.wt. of a lubricant, 0.1-5 pts.wt. of an antioxidizing agent, 1-200 pts.wt. of an epoxy resin, and 1-30 pts.wt. of a silane coupling agent. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a partial-discharge-resistant insulating coating material in which silica particles are highly uniformly dispersed by suppressing the aggregation of the silica particles and hence which can suppress partial discharge degradation; an insulated wire with a film formed on a conductor by using the partial-discharge-resistant insulating coating material; and their production methods. SOLUTION: The partial-discharge-resistant insulating coating material is produced by mixing a polyamideimide resin coating material containing γ-butyrolactone as the main solvent with an organosilica sol containing γ-butyrolactone as the main dispersion medium, provided that the amount of γ-butyrolactone is 50-100% of the total solvent. The coating material is applied to a conductor 1 and baked to form a partial-discharge-resistant insulator film 2, thus giving an insulated wire. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an inexpensive enameled wire with high reliability of an insulating coating in the vicinity of a welding part in welding; and to provide an insulating coating used for it. SOLUTION: This enameled wire 10 has the insulating coating composed of at least two insulating layers around a conductor 11; the outermost insulating layer 14 is formed of a polyamide-imide coating; and a mixed resin insulating layer 13 formed of a mixed resin coating of a polyimide resin and a polyamide-imide resin is formed on the inner layer side of the outermost insulating layer 14. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a coating material for a partial discharge resistant enameled wire, which achieves simultaneously improvement of partial discharge onset voltage by lowering dielectric constant and suppressant effects of partial discharge erosion by filling inorganic materials and has excellent voltage-applied life characteristics; and to provide the partial discharge resistant enameled wire.SOLUTION: A coating material is configured such that: organosol, obtained by dispersing an inorganic fine particle in a dispersant, is dispersed in a coating material for polyesterimide enameled wire, a coating material for polyamideimide enameled wire or a coating material for a polyimide enameled wire. The inorganic fine particle comprises a metal oxide fine particle or a silicon oxide fine particle, has 100 nm or less average particle diameter, and has a hollow inside or porous inside. The dispersant is a mixed solvent mainly comprising phenols or benzyl alcohol and aromatic alkyl benzene; a mixed solvent mainly comprising xylene or toluene with lower alcohol; or N-methyl-2-pyrrolidone, dimethylacetamide, dimethylformamide, γ-butyrolactone, cyclohexanone or a mixed solvent thereof. The organosol is dispersed in the coating material for polyesterimide enameled wire, the coating material for polyamideimide enameled wire or the coating material for a polyimide enameled wire so that the content of the inorganic fine particle falls within a range of 1-100 pts.wt. based on 100 pts.wt. of the coating material for an enameled wire.
Abstract:
PROBLEM TO BE SOLVED: To provide polyamide resin insulating paint capable of achieving high-quality insulated film which generates no grain nor foaming without reducing painting operability compared to using a sealing agent, such as conventional alcohols or the like.SOLUTION: Polyamideimide resin insulating paint contains polyamideimide resin obtained by reacting an isocyanate constituent with an acid constituent, and an isocyanate group, which is an end group of the polyamideimide resin, is sealed with water.