Title: Multi-layered hollow coil, and an apparatus and method of manufacturing thereof
Application Number: 85109027 Application Date: 1985.11.08
Publication Number: 1000821 Publication Date: 1986.05.10
Approval Pub. Date: 1990.08.01 Granted Pub. Date: 1990.08.01
International Classifi-cation: H01F5/00;H01F41/06
Applicant(s) Name: Hokuto Manufacturing Co., Ltd. Address:
Inventor(s) Name: Takahashi Teruo
Attorney & Agent: LU NING BAO GUANQIAN
Abstract:
    Multi-layered hollow coil and apparatus and method of manufacturing thereof are disclosed, which includes a first regularly wound first portion of a coil due to a wire from a wire source by rotation of a coil metrix on a rotatable axle and subsequently spirally wound second portion due to a wire accumulated on a winding roller by reverse rotation of the coil matrix which is disposed between two flanges. In the first wound portion of multi-layers, layers in odd numbers are wound N times and other layers in even numbers are wound N-1 times, and the layers excepted a first layers are wound between crests of windings of the lower layer. The first wound portion is pressed between the flanges by a movable flange thereof and electrically melt. After united the first wound portion, the coil matrix is reversely rotated and the second wound portion is spirally wound adjacent to a side surface of the first wound portion, and both portions are pressed by the flanges and melt with one body of the coil which is removed from the coil matrix.
Time: 6