| 发明名称 |
PRODUCTION METHOD AND DEVICE FOR POROSITY SIO2 PREFORM |
| 摘要 |
PURPOSE: A simple device for producing a perform is provided to have a small change of density. CONSTITUTION: The production device for the SiO2 perform comprises:plural welding burners moved toward and backward at a repeated cycle according to a formed spare perform; a heat absorption unit(12) offered into the area around a returning point(7); a heat screen(13) installed inside the area of the returning point(7).
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| 申请公布号 |
KR20000006462(A) |
申请公布日期 |
2000.01.25 |
| 申请号 |
KR19990024209 |
申请日期 |
1999.06.25 |
| 申请人 |
HERAEUS QUARZGLAS GMBH & CO. KG;SHIN-ETSU QUARTZ PRODUCTS CO., LTD. |
发明人 |
PRITZ HANS GEOROG;PERPER UDO;NUBAUE FRANK;SHAPER HARTBIG;RUPER ZURGEN |
| 分类号 |
C03B37/08;C03B8/04;C03B19/14;C03B37/014;C03B37/018;(IPC1-7):C03B37/08 |
主分类号 |
C03B37/08 |
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