Claims
- 1. A method of molding a film of para-orientation aromatic polyamide into an acoustic diaphragm part comprising the steps of:
- (a) providing female and male dies;
- (b) heating the female and male dies to a temperature of approximately half the melting point of the para-orientation aromatic polyamide;
- (c) setting the film of para-orientation aromatic polyamide between the heated female and male dies;
- (d) pressing the set film by the heated dies at a pressing speed of from 15 mm/sec. to 20 mm/sec. to form the acoustic diaphragm part;
- (e) cooling the dies to a temperature below approximately 80.degree. C. while maintaining said pressing; and
- (f) releasing the dies to remove the formed acoustic diaphragm part from the dies.
Priority Claims (2)
Number |
Date |
Country |
Kind |
1-178989 |
Jul 1989 |
JPX |
|
1-218701 |
Aug 1989 |
JPX |
|
Parent Case Info
This application is a continuation of Ser. No. 0 07/770,221, filed Oct. 3, 1991, now abandoned, which itself was a divisional of Ser. No. 07/549,175, filed Jul. 5, 1990, also abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
4315557 |
Nakaya et al. |
Feb 1982 |
|
4752643 |
Imanishi et al. |
Jun 1988 |
|
4857255 |
Imanishi et al. |
Aug 1989 |
|
5066351 |
Knoll |
Nov 1991 |
|
Foreign Referenced Citations (5)
Number |
Date |
Country |
0303173 |
Feb 1989 |
EPX |
54-118817 |
Sep 1979 |
JPX |
62-174129 |
Jul 1987 |
JPX |
63-278491 |
Nov 1988 |
JPX |
1338703 |
Nov 1973 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
549175 |
Jul 1990 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
770221 |
Oct 1991 |
|