Method for manufacturing glass, method for manufacturing lens, and melting apparatus
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United States of America Patent
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Jul 16, 2019
Grant Date -
Dec 22, 2016
app pub date -
Jun 16, 2016
filing date -
Jun 22, 2015
priority date (Note) -
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Abstract
A method for manufacturing glass, including the steps of heat-melting a raw material for producing glass by using a melting furnace having a plurality of gas flow paths while the raw material is levitated from the melting furnace by a gas ejected from the gas flow paths, and performing cooling so as to produce glass, wherein the melting furnace includes a recess portion, at least one first gas flow path configured to eject the gas in the vertical direction into the recess portion, a plurality of second gas flow paths configured to eject the gas in the direction toward the center axis of the melting furnace into the recess portion, the raw material is heat-melted while the raw material is levitated by the gas ejected from the first gas flow path and the gas ejected from the second gas flow paths, and the molten raw material is cooled.
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