Coating die and manufacturing method of enameled wire using same

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8746165
APP PUB NO 20120164315A1
SERIAL NO

13335992

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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There is provided a coating die for applying an insulation varnish around a wire conductor, comprising: a die body; and a die hole formed through the die body, the die hole including: an entry portion having an opening size monotonically decreasing along a conductor insertion direction; and a coating portion comprising a sub-portion having a constant opening size, in which: on an inner surface of the coating portion are provided at least four protrusions equally spaced in a circumferential direction of the inner surface, the protrusions projecting toward a center axis of the die hole; and each of the protrusions includes a portion with a height gradually increasing along the conductor insertion direction from a boundary between the entry portion and the coating portion. There can be formed an enameled wire having a thin and uniform insulation coating by using the invented coating die.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
HITACHI METALS LTD2-70 KONAN 1-CHOME MINATO-KU TOKYO

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Goto, Masayoshi Hitachi, JP 26 218

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