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Title:
SPEAKER EDGE, METHOD OF FOAM-MOLDING THE SAME, APPARATUS FOR FOAM-MOLDING THE SAME, SPEAKER EDGE FOAM-MOLDING SYSTEM, AND SPEAKER EMPLOYING THE SPEAKER EDGE
Document Type and Number:
WIPO Patent Application WO/2002/035883
Kind Code:
A1
Abstract:
A speaker edge which is obtained by mechanically mixing a gas with a thermosetting composition comprising as major components a urethane prepolymer and a latent hardener which is an inactivated solid amine, injecting the mixture into a mold, and then heat-curing it while foaming it to thereby mold it; a method of molding the speaker edge which comprises injecting/applying a foamable thermosetting composition to the female mold of a mold set heated to or below the critical heat-curing temperature of the composition, press-fitting to the female mold the male mold heated to or above the critical heat-curing temperature of the foamable thermosetting composition while foaming the composition, and foaming and curing the composition; and a speaker edge molding apparatus which comprises a device for taking a gas therein, a device for injecting a thermosetting composition into the gas, a device for mechanically mixing the gas with the thermosetting composition to disperse them, a device for forcibly injecting the resultant foamable thermosetting composition into the female mold of a speaker edge mold set, a device for press-fitting the male mold to the female mold, and a device for foaming and curing the foamable thermosetting composition.

Inventors:
TABATA SHINYA (JP)
MIZONE SHINYA (JP)
TAKAHASHI YOSHIYUKI (JP)
IKEDA KIYOSHI (JP)
YAMASAKI HIROKO (JP)
OKUDA SHINJI (JP)
TAKADA MASAHARU (JP)
Application Number:
PCT/JP2001/009167
Publication Date:
May 02, 2002
Filing Date:
October 18, 2001
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
SUNSTAR ENGINEERING INC (JP)
TABATA SHINYA (JP)
MIZONE SHINYA (JP)
TAKAHASHI YOSHIYUKI (JP)
IKEDA KIYOSHI (JP)
YAMASAKI HIROKO (JP)
OKUDA SHINJI (JP)
TAKADA MASAHARU (JP)
International Classes:
B29C39/10; B29C39/38; B29C44/12; B29C44/34; B29C67/20; H04R7/18; H04R7/20; H04R31/00; B29C35/08; B29L31/38; (IPC1-7): H04R7/20; H04R31/00
Foreign References:
JPH1025327A1998-01-27
JPH08207074A1996-08-13
Other References:
See also references of EP 1333699A4
Attorney, Agent or Firm:
Sato, Yataro (Room 409, Yuni higashi-umeda 7-2 Minami Ogi-mach, Kita-ku Osaka Osaka, 530-0052, JP)
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