PREFORM PRODUCTION APPARATUS FOR PRECISION PRESS MOLDING, PRODUCTON METHOD OF A PREFORM FOR PRECISION PRESS MOLDING AND PRODUCTION METHOD OF AN OPTICAL ELEMENT
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United States of America Patent
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app pub date -
Sep 22, 2011
filing date -
Oct 26, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A preform production apparatus for precision press molding, which is downsized but can produce preforms at a lower cost, and a production method thereof using the apparatus are provided. The production method of a preform for precision press molding includes forming a molten glass body C by way of receiving and cutting molten glass A, being flowed continuously from a discharge nozzle 2, by a support member 1 or by way of allowing molten glass to fall in drops from a discharge nozzle 2 and receiving thereof by a support member 1, and transferring the molten glass body C from the support member 1 to a mold 5 by way of displacing the support member to near the mold 5, disposed not to be beneath the discharge nozzle 2, while increasing the viscosity of the molten glass body C on the support member 1.
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