发明名称 |
Method and device for manufacturing a rod of a material having a cross-sectional composition gradient |
摘要 |
The material is in a fluid state at a predetermined temperature above the ambient temperature. According to the invention: a) at least two different compositions of this material in the fluid state are prepared; b) simultaneously and concentrically both the core of the rod with the aid of one of the compositions and a sheath enveloping this core with the aid of another composition are cast; and c) the casting is then taken to a temperature at which it solidifies to constitute the rod. Advantageously, the section of the casting is made to grow by its passing through a cylindrical mold shaped to define the final section of the rod. Application to the manufacture of a glass rod presenting a cross-sectional refractive index gradient. <IMAGE> |
申请公布号 |
EP0738690(A1) |
申请公布日期 |
1996.10.23 |
申请号 |
EP19960105559 |
申请日期 |
1996.04.09 |
申请人 |
CORNING INCORPORATED |
发明人 |
FREDHOLM, ALLAN,;KERDONCUFF, ALAIN,;PRASSAS, MICHEL, |
分类号 |
B29C39/12;B29C39/38;C03B17/02;C03B37/012;C03B37/014 |
主分类号 |
B29C39/12 |
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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