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US 6,183,674 B2Granted
Manufacturing method of diaphragm for use in electroacoustic transducers
AssigneeFoster Electric Company, Limited
InventorAkihiro Nonogaki
Life of this patent
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Abstract
A manufacturing method of diaphragms for use in electroacoustic transducers simultaneously joins an edge and a diaphragm body upon molding the diaphragm body through an injection molding with a set of mating molds for forming the diaphragm body, with the edge of a cell-structure disposed on one of the mating molds, the edge being preliminarily molded and cut into a predetermined shape, and with the other mold mated with the one mold.
Claims6
A manufacturing method of diaphragms for use in electroacoustic transducers, comprising the steps of:
- furnishing an edge of a cell structure that is preliminarily molded and cut into a predetermined shape;
- disposing the edge furnished on one of a pair of mating molds for an injection molding of the diaphragm;
- placing the other mold on the one mold with the preliminarily prepared edge disposed thereon, while leaving between both molds a predetermined gap required for molding a diaphragm body;
- and
- injecting into the gap between the molds a molding resin material for the diaphragm body to mold the body and to simultaneously join the outer periphery of the diaphragm body being injection-molded at least with the inner periphery of the edge preliminarily molded.
2 more elements
Dependencies are inferred from the claim text.