JPS6441600A - Manufacture of voice coil for loudspeaker and voice coil therefor - Google Patents
Manufacture of voice coil for loudspeaker and voice coil thereforInfo
- 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
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.
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)
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)
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 |
-
1987
- 1987-08-07 JP JP19785887A patent/JPS6441600A/en active Pending
Patent Citations (1)
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)
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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