Methods for making a loudspeaker vibrating diaphragm

Details Methods for making a loudspeaker vibrating diaphragm Methods for making a loudspeaker vibrating diaphragm

1998-01-07

2000-02-29

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264 455, B29C 4402

Patent

active

060305614

ABSTRACT:
A method of producing a loudspeaker vibrating diaphragm comprising the steps of injecting an amount of resin containing a foaming agent into a metallic mold of an injection molding machine, the mold including a fixed part and a movable part, reducing a mold pressing force of the injection molding machine upon completion of the resin injection, so as to enlarge a space formed between the fixed part and the movable part by a predetermined distance, so that the foaming agent is foamed to obtain a foam layer in the diaphgram.

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