Manufacture and device for speaker diaphragm


PURPOSE: To efficiently manufacture a reliable diaphragm by solidly molding a cone part to constitute a diaphragm and an edge part with an injection molding of which material is a thermoplastic synthetic resin. CONSTITUTION: An edge 17 (same code as a cavity 17) is molded by injecting the melted thermoplastic synthetic resin into the cavity 17 through gates 10, 10a and 10b. The resin being injected into a die flows into the exposure part of a cone 15 in a cavity 16, melt-sticks to the end part of the cone 15 and the cone part and the edge part are made solid. Next, the die is opened by raising a movable die 11 and the diaphragm, of which cone 15 and edge 17 are made solid, is obtained by removing a molded body from a die Y. Thus, the diaphragm showing an excellent sound effect can be easily obtained. COPYRIGHT: (C)1990,JPO&Japio




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Cited By (3)

    Publication numberPublication dateAssigneeTitle
    GB-2273678-AJune 29, 1994Patrick Arthur Leach, David Ian LeachMethod and apparatus for making a loudspeaker cone and surround assembly
    GB-2273678-BMay 03, 1995Patrick Arthur Leach, David Ian LeachMethod and apparatus for making a loudspeaker cone and surround assembly
    JP-H0629298-UApril 15, 1994大日化成工業株式会社スピーカーの振動板支持構造