JPS6441600A - Manufacture of voice coil for loudspeaker and voice coil therefor - Google Patents

Manufacture of voice coil for loudspeaker and voice coil therefor

Info

Publication number
JPS6441600A
JPS6441600A JP19785887A JP19785887A JPS6441600A JP S6441600 A JPS6441600 A JP S6441600A JP 19785887 A JP19785887 A JP 19785887A JP 19785887 A JP19785887 A JP 19785887A JP S6441600 A JPS6441600 A JP S6441600A
Authority
JP
Japan
Prior art keywords
polyimide
resin layer
polyamic acid
wire
voice coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP19785887A
Other languages
Japanese (ja)
Inventor
Yukimi Hiroshima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Foster Electric Co Ltd
Original Assignee
Foster Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Foster Electric Co Ltd filed Critical Foster Electric Co Ltd
Priority to JP19785887A priority Critical patent/JPS6441600A/en
Publication of JPS6441600A publication Critical patent/JPS6441600A/en
Pending legal-status Critical Current

Links

Landscapes

  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

PURPOSE:To eliminate the need of a conventional adhesive by adhering and fixing a polyamic acid resin layer soluble to a solvent coated and formed on a wire beforehand between the wires by means of a solvent reactivation, thereafter, executing a heat treatment and making into a polyimide. CONSTITUTION:A polyimide insulating wire is applied with a polyamic acid varnish again in a wire condition, simultaneously, it is heated, and the solvent of the varnish is vaporized. For a heating temperature, the solvent of the varnish is vaporized, and it is heated at a temperature at which the polyamic acid is not made into the polyimide, namely, 120-150 deg.C. For a heating time, it takes approximately 30min. In such a way, two layers of a polyimide resin layer 2 and a polyamic acid resin layer 2' which is not made into the polyimide yet in a active condition are formed on the outer periphery of a wire 1. Next, the polyamic acid resin layer 2' is made into the polyimide as shown in a figure (c), and when it is bonded with the first polyimide resin layer 2 to coat the outer periphery of the wire 1, a voice coil having a heat resistance can be obtained.
JP19785887A 1987-08-07 1987-08-07 Manufacture of voice coil for loudspeaker and voice coil therefor Pending JPS6441600A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19785887A JPS6441600A (en) 1987-08-07 1987-08-07 Manufacture of voice coil for loudspeaker and voice coil therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19785887A JPS6441600A (en) 1987-08-07 1987-08-07 Manufacture of voice coil for loudspeaker and voice coil therefor

Publications (1)

Publication Number Publication Date
JPS6441600A true JPS6441600A (en) 1989-02-13

Family

ID=16381500

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19785887A Pending JPS6441600A (en) 1987-08-07 1987-08-07 Manufacture of voice coil for loudspeaker and voice coil therefor

Country Status (1)

Country Link
JP (1) JPS6441600A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04103953U (en) * 1991-02-15 1992-09-08 株式会社新潟鐵工所 Boom device for transporting fresh concrete

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61226000A (en) * 1985-03-30 1986-10-07 Totoku Electric Co Ltd Manufacture of extremely heat resistant voice coil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61226000A (en) * 1985-03-30 1986-10-07 Totoku Electric Co Ltd Manufacture of extremely heat resistant voice coil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04103953U (en) * 1991-02-15 1992-09-08 株式会社新潟鐵工所 Boom device for transporting fresh concrete

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