METHOD FOR PRODUCING A MAGNET PLATE FOR ELECTROACOUSTIC TRANSDUCERS

摘要

F-1803 METHOD FOR PRODUCING A MAGNET PLATE FOR ELECTROACOUSTIC TRANSDUCERS A magnet plate having numerous perforations for electroacoustic transducers is produced by compressing magnet powders between a pair of pressure surfaces to a plate configuration of a thickness approximately doubling the final thickness of the plate concurrently with formation of the perforations therein, one side surface of the plate configuration being removed after sintering to such an extent that the perforations should open in both side surfaces of said plate configuration. Undesirable destruction of the plate configuration during the sintering is effectively prevented with enhanced uniformity of the product in the electromagnetic characteristics.