发明名称 |
Melting and refining of glass or the like with vacuum refining. |
摘要 |
<p>Method and apparatus are provided for refining glassy material (51) or the like by vacuum. The material (51) is first melted and then introduced into a vacuum chamber (12), preferably into space above liquid (51) held in the chamber (12). Other aspects involve a two-step melting process preparatory to the vacuum refining, in which the material is initially liquefied in one stage (10) and dissolution of particles is substantially completed in a second stage (11). The molten material (51) is preferably foamed (50) immediately upon entry into the vacuum chamber (12).</p> |
申请公布号 |
EP0231518(A2) |
申请公布日期 |
1987.08.12 |
申请号 |
EP19860118053 |
申请日期 |
1986.12.24 |
申请人 |
PPG INDUSTRIES, INC. |
发明人 |
KUNKLE, GERALD ERASMUS;WELTON, WRIGHT MONTGOMERY;SCHWENNINGER, RONALD LEE |
分类号 |
C03B3/00;C03B3/02;C03B5/00;C03B5/04;C03B5/14;C03B5/225;C03C3/078;C03C3/087;(IPC1-7):C03B5/00;C03C1/00 |
主分类号 |
C03B3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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