Process of making a diaphragm of vitreous hard carbonaceous material for an acoustic device
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B29C-065/54
C01B-031/02
출원번호
US-0388753
(1989-08-03)
발명자
/ 주소
Odajima Hideo (Fujioka JPX)
출원인 / 주소
Mitsubishi Pencil Co., Ltd. (Higashiohi JPX 03)
인용정보
피인용 횟수 :
0인용 특허 :
3
초록▼
A process for producing a diaphragm for an acoustic device, the diaphragm being formed of vitreous hard carbonaceous material, including the steps of preliminarily molding, in film or sheet shapes, vitreous hard carbon thermosetting resin which, upon calcining, exhibits high hardness and gas imperme
A process for producing a diaphragm for an acoustic device, the diaphragm being formed of vitreous hard carbonaceous material, including the steps of preliminarily molding, in film or sheet shapes, vitreous hard carbon thermosetting resin which, upon calcining, exhibits high hardness and gas impermeability, molding a diaphragm in a desired diaphragm shape and a voice coil bobbin in a desired voice coil bobbin shape from said preliminary moldings, calcining the diaphragm molding and the voice coil bobbin molding, and forming an integral structure of the diaphragm and the voice coil bobbin by calcining in an inert gas atmosphere, a composite material comprising the diaphragm molding and the voice coil bobbin molding with an organic liquid composition positioned therebetween, the organic liquid composition exhibiting high carbon residual yield. Thus, the diaphragm can transmit a driving force generated in a voice coil to the diaphragm without loss, without aging fatigue (such as creep) of the material, irrespective of external environments (such as temperature and moisture) and with excellent heat resistance in an integral structure of the diaphragm.
대표청구항▼
A process for producing a diaphragm for an acoustic device, the diaphragm being formed of vitreous hard carbonaceous material, comprising the steps of: preliminarily molding, in film or sheet shapes, vitreous hard carbon thermosetting resin which, upon calcining, exhibits high hardness and gas imper
A process for producing a diaphragm for an acoustic device, the diaphragm being formed of vitreous hard carbonaceous material, comprising the steps of: preliminarily molding, in film or sheet shapes, vitreous hard carbon thermosetting resin which, upon calcining, exhibits high hardness and gas impermeability, molding a diaphragm in a desired diaphragm shape and a voice coil bobbin in a desired voice coil bobbin shape from said preliminary moldings, calcining the diaphragm molding and the voice coil bobbin molding, and forming an integral structure of the diaphragm and the voice coil bobbin by calcining in an inert gas atmosphere a composite material comprising the diaphragm molding and the voice coil bobbin molding with an organic liquid composition positioned therebetween, the organic liquid composition exhibiting high carbon residual yield.
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이 특허에 인용된 특허 (3)
Chi Chang V. (Brookfield CT), Method of making an integral carbonized cooler assembly.
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