Crucible for manufacturing optical glass

Abstract

The invention belongs to the technical field of optical glass smelting, and particularly relates to a crucible for manufacturing optical glass. The crucible comprises a crucible body, a motor and a sealing cover; a cavity is designed in the crucible body; a rotating shaft of the motor penetrates through the sealing cover and is fixedly connected to a stirring shaft in the cavity of the crucible body; the stirring shaft is rotatably connected to uniformly arranged stirring rods and heating rods; a first cavity is formed in the sealing cover; the rotating shaft of the motor is fixedly connectedto a rotating wheel in the first cavity; extrusion plates which are uniformly arranged are hinged to the wall of the first cavity; an inclined side of the extrusion plates are fixedly connected to extrusion bags; a second cavity is formed in the inner wall of the crucible body; the second cavity is arranged around the inner cavity of the crucible body; the extrusion bags are all communicated withthe inner cavity of the crucible body and the second cavity through one-way conduits; the motor rotates to drive the rotating wheel to extrude the extrusion bags, so that the extrusion bag pumps airflow in the inner cavity of the crucible body into the second cavity, the air pressure of the crucible body is reduced, and the melting point of raw materials is partially reduced.

Description

technical field [0001] The invention belongs to the technical field of optical glass smelting, in particular to a crucible for manufacturing optical glass. Background technique [0002] Clay crucibles and platinum crucibles are generally used in the optical glass melting process. Clay crucibles are more likely to be eroded by the glass solution in the process of preparing glass, so that the transparency of the prepared glass is not high, while platinum crucibles are relatively weak in nature. Stable smelted glass is of high quality and is generally used more. However, in the melting process of optical glass, the melting temperature of optical glass is generally above 1000 degrees, and metal platinum will be damaged when working at a high temperature of 1250 degrees for a long time. It reacts with silicon dioxide in the optical glass raw material to form volatile silicide, which reduces the life of the device and causes certain pollution to the glass. Cracks can easily reduc...

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Problems solved by technology

[0003] In order to make up for the deficiencies of the prior art and solve the problem that the platinum crucible is more seriously lost during use and the homogenization effect of optical glass is not easy to control during the smelting process, the invention proposes a crucible for manufacturing optical glass

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