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.

摘要

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.