| 摘要 |
PURPOSE:To eliminate influence exerted to a characteristic due to an adhesive agent, by tightly adhering and coupling a piezoelectric element, at the time of reaction of polymerization or polycondensation of thermosetting resin which becomes a diaphragm. CONSTITUTION:A gel-like base material 19 of thermosetting resin is flowed, extended and formed to a gel-like thin film 20 with uniform thickness onto a container sheet 5 from a jet nozzle, is inserted, held and transferred by the container sheets 5, 22 from the upper and lower parts together with a reinforcing sheet material 21, is slightly hardened by a preheating device 24, the film thickness is adjusted by rolls 13, 14, and thereafter, a piezoelectric element 3 is supplied by one sheet each at constant interval from a piezoelectric element supplying device 26, on a table 25. Subsequently, the piezoelectric element 3 is lightly pressed against the thin film 20 by auxiliary rolls 27, 28 provided behind the table 25, and thereafter, is made to pass through a main heating device 29. By this main heating device, the thin film 20 becomes a hardened thin film 20 as a hardening reaction of polymerization or polycondensation advances, and at the same time, the piezoelectric element 3 is tightly adhered and coupled with the thin film 20. It is punched to a bimorph diaphragm 1 of a desired shape by a press device 30 in the end. |
