发明名称 |
Process for manufacturing glass optical elements |
摘要 |
Processes for manufacturing glass optical elements by press molding a heated and softened glass material in preheated molds. In the process, the glass material is heated while it is floated by a gas blow and the heated and softened glass material is transferred to the preheated molds and then subjected to press molding. Alternatively, the process comprises: heating a glass material at a temperature at which the glass material has a viscosity of lower than 109 poises, preheating molds at a temperature at which the glass material has a viscosity of from 109 to 1012 poises, subjecting the heated and softened glass material to initial press in the preheated molds for 3 to 60 seconds, starting to cool the vicinity of molding surfaces of the molds at a rate of 20 DEG C./minute or higher upon starting of, or during, or after the initial press, and removing a molded glass article from the molds after the temperature of the vicinity of the molding surfaces of the molds becomes a temperature equal to or lower than a temperature at which the glass material has a viscosity of 1012 poises.
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申请公布号 |
US5873921(A) |
申请公布日期 |
1999.02.23 |
申请号 |
US19970881751 |
申请日期 |
1997.06.24 |
申请人 |
HOYA PRECISIONS INC.;HOYA CORPORATION |
发明人 |
HIROTA, SHIN-ICHIRO;UNO, KEN;TAKAHARA, HIROAKI;FUJIMOTO, TADAYUKI;ENOMOTO, HIROSHI |
分类号 |
C03B11/08;C03B11/12;(IPC1-7):C03B40/04 |
主分类号 |
C03B11/08 |
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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