Diaphragm of speaker and its manufacture

Abstract

Abstract PURPOSE:To realize the manufacturing method for the speaker diaphragm using the high-elasticity and high-intensity carbon fiber as the base material. CONSTITUTION:The acrylicfiber in which the carbon crystal elements feature the high orientation structure over the full temperature range of burning is used as the precursor (raw material fiber). And the acrylic fibers are woven vir the film, unwoven fabric and yarn and then fitted in the mold featuring the shape of the diaphragm to be applied with the tensile force. Then the acrylic fibers applied with the tensile force are oxidized in the oxide atmosphere of the air or the like and at temperatures of 200-300 deg.C to be blackened and then burnt in the inactive atmosphere and at 800-1600 deg.C to be carbonated. Thus, the carbon fibers can be obtained. The active groups such as >O, -OH, -COOH or the like are formed on the surface of the carbon fiber along with a number of edge atoms of the graphite crystal formed, thus increasing the adhesive performance to the resin. The synthetic resin is impregnated and hardened to the surface treatment carbon fiber in the form of the matrix, and then the fabrication is carried out. Thus, the speaker diaphragm can be obtained.

Inventors

• 👤 Takeshi Isogai

Bibliographic Details