Molten glass vacuum degassing apparatus, vacuum degassing method, and apparatus and method for manufacturing glass product

Abstract

Disclosed is a vacuum degassing apparatus in which bubbles in molten glass come into contact with an inner wall of an upper space of a vacuum degassing tank and molten glass flowing along the inner wall can be discharged to outside of the vacuum degassing tank. The vacuum degassing tank is provided with a ceiling part, a peripheral wall part, and a bottom wall part for defining the upper space and an accommodating part for the molten glass. The peripheral wall part which comes into contact with the molten glass is formed from a combination of a plurality of tank bricks, and the upper space is formed from a combination of a plurality of arch bricks. Of the plurality of arch bricks forming the upper space, the arch bricks which come into contact with the top of the tank bricks are arranged on the upper surface of the tank bricks by positioning the lower part of the surface on the accommodating part side of said arch bricks further to the outer side than the surface of the tank bricks that comes into contact with the molten glass. A storage part for the molten glass is formed between the upper surface of the tank bricks and the lower part of the arch bricks disposed thereon. A molten glass discharge flow passage which communicates with outside of the vacuum degassing tank is formed at a joining portion of the arch bricks and the tank bricks facing the storage part.

Description

technical field [0001] The present invention relates to a vacuum degassing device and a vacuum degassing method for molten glass, and a manufacturing device and method for glass products. Background technique [0002] In the past, in order to improve the quality of the glass products obtained by molding, after melting the glass raw materials in a melting tank and before molding the molten glass with a molding device, a vacuum defoaming device was used to remove bubbles generated in the molten glass. [0003] The above-mentioned vacuum degassing device is a device that allows the bubbles contained in the molten glass to grow in a relatively short period of time by passing the molten glass inside and maintaining it in a vacuum degassing tank with a predetermined vacuum degree, and utilizes the grown bubbles. The buoyancy of the buoyancy makes the bubbles float up to the surface of the molten glass, and the bubbles are broken on the surface of the molten glass, thereby efficien...

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Problems solved by technology

[0014] In addition, when the components of the vault tiles are mixed into the molten glass, the components that are not components of the molten glass are mixed into the molten glass, and there is a possibility that the quality of the glass product may deteriorate.

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