MANUFACTURE OF CUT CORE FOR TRANSFORMER - MITSUI PETROCHEMICAL IND

Title:

MANUFACTURE OF CUT CORE FOR TRANSFORMER

Document Type and Number:

Japanese Patent JPH04206909

Kind Code:

A

Abstract:

PURPOSE: To prevent the deterioration of magnetic properties by surrounding a wound amorphous metal sheet with a fluid-tight film, by cutting the sheet into a desired shape after covering the outer peripheral face of the sheet with a shape-retaining agent, and by peeling off the fluid-tight film and shape- retaining agent to make the sheet into a core material.

CONSTITUTION: A core is formed while a tape-shaped amorphous metal film 1 is wound around it. Then, a tape as a fluid-tight film 2 is wound around the outside face of this core. A shape-retaining agent 3 is formed on the surface of this fluid-tight film 2 for the purpose of preventing the film 1 in a laminated state from getting out of shape. After a desired processing is conducted, the fluid-tight film 2 and shape-retaining agent 3 are peeled off so that a core material is obtained. The shape-retaining agent 3 is hindered by the fluid-tight film 2 from entering the core material and from deteriorating magnetic properties. Thus, it is possible to display excellent magnetic properties essential to an amorphous metal without diminishing such properties.

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Inventors:

UEDA YASUSHI
TOMOSHIGE TORU
HAYASHI MITSUNORI

Application Number:

JP33890090A

Publication Date:

July 28, 1992

Filing Date:

November 30, 1990

Export Citation:

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Assignee:

MITSUI PETROCHEMICAL IND

International Classes:

H01F41/02; (IPC1-7): H01F41/02

Attorney, Agent or Firm:

Munenori Sato (2 outside)

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