Method for reducing glass splashed balls during metal shell fabrication

Abstract

The invention discloses a method for reducing glass splashed balls during metal shell fabrication, which comprises the following steps: mounting a metal shell, a lead and a glass insulator into a graphite die; covering a pumping device on the graphite die, and sealing the pumping device with the joint around the graphite die; arranging the assembled pumping device and the graphite die on a vibrator; starting an air pump and the vibrator to vibrate and pump air to the die so as to lead glass powdered scrap outside the metal shell, the lead and the glass insulator to be pumped away following air flow; and taking the pumped graphite die to place in a nitrogen high-temperature furnace for sintering. The method pumps the glass powdered scrap adhered on the surface of the shell and the surface of the lead by the special pumping device after the product to be sintered is assembled into the graphite die, thereby greatly reducing the splashed balls on the surface of the shell after the sintering.

Description

Technical field [0001] The invention relates to the field of packaging of electronic and optoelectronic products, in particular to a method for reducing glass splashing in the manufacture of a metal casing. Background technique [0002] The main process of manufacturing the metal shell is the process of sintering the shell and metal leads of the metal shell through the molten glass in a high temperature furnace protected by nitrogen. The glass used for sintering the metal shell must first be made into a round tubular glass insulator, then assembled in a graphite mold together with the shell and leads, and then placed in a high-temperature furnace for sintering. [0003] The method often used in the manufacture of glass insulators is the dry pressing method. The glass insulator blank after dry pressing must be dewaxed at high temperature to remove the organic binder and have a certain strength before it can be used for assembly and sintering. Because the temperature cannot be too ...

AI Technical Summary

Problems solved by technology

Because the temperature cannot be too high and close to the melting point of the glass during high-temperature dewaxing, otherwise the glass blank will melt and cannot maintain the shape during molding

Therefore, the glass blank after wax discharge is not very dense, and some glass powder sticking to the surface of the glass blank is not firmly combined with the blank, which makes it easy to rub against the metal shell and lead wires during the assembly process and fall on the mold or product surface

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