Curing process for piezoelectric ceramics buzzing sheet

Abstract

The present invention relates to a curing process for a piezoelectric ceramics buzzing sheet in a buzzer. According to the curing process, a metal sheet is placed on a sheet suction mold, the sheet suction mold adsorbs the metal sheet, and silk-screen printing is adopted to print an anaerobic glue onto the upper surface of the metal sheet; a piezoelectric resonance sheet is placed on the metal sheet, and is bonded on the metal sheet through the anaerobic glue; the metal sheet and the piezoelectric resonance sheet bonded on the metal sheet are removed from the sheet suction mold, and are packaged by adopting a vacuum package bag; the vacuum package bag filled with the metal sheet and the piezoelectric resonance sheet is placed in ultra-high hydrostatic hydraulic equipment to carry out pressing curing, wherein the pressure of ultra-high hydrostatic hydraulic pressure is more than or equal to 120 MPa, and a pressure keeping time is 3-5 minutes; and the vacuum package bag is removed from the ultra-high hydrostatic hydraulic equipment, and is unpacked, the metal sheet and the piezoelectric resonance sheet are firmly bonded, and the curing process is completed. According to the present invention, the force applying on the product is uniform, the bonding force is stable and reliable, the curing time is short, the production efficiency is improved, the product is not deformed, and the frequency consistency is good.

Description

technical field [0001] The present invention relates to the technical field of buzzers, in particular to a piezoelectric ceramic buzzer, and more particularly to a curing process for piezoelectric ceramic buzzers in the buzzer. Background technique [0002] Piezoelectric ceramic buzzer is a piezoelectric element that uses the piezoelectric effect to excite bending vibration under the action of an electrical signal. It is also called a piezoelectric vibration plate. It is mainly used as the core component of sounding devices such as buzzers and alarms. . Its structure is mainly composed of a thin metal sheet and a thin piezoelectric resonant film bonded by glue. The traditional process is to use heat-curable epoxy glue to bond, and then apply a certain pressure and put it in an oven for heat curing. Because the glue needs to be cured at high temperature, the products produced by this process will have a certain degree of deformation, especially for some products with very th...

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Problems solved by technology

Because the glue needs to be cured at high temperature, the products produced by this process will have a certain degree of deformation, especially for some products with very thin metal substrates, the degree of defor

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