Being production manner of the diaphragm for the speaker which has the diaphragm null paper making process for the speaker which is produced by the production manner

摘要

PROBLEM TO BE SOLVED: To improve sound quality and reliability to reduce the minimum resonance frequency small and extend a low-frequency reproduction bandwidth, in a small speaker diaphragm to be used for a cellular phone or the like.;SOLUTION: A method for manufacturing a speaker diaphragm, including a paper-making step, includes: a paper-making step for wetting a diaphragm material and making paper from fiber; a preliminary drying step for drying the material and evaporating moisture; and a press molding step for press-molding a preliminary molded object obtained by the preliminary drying step; wherein the bonding state of the fiber of the diaphragm material is destroyed by press molding to lower an elastic modulus.;COPYRIGHT: (C)2011,JPO&INPIT