Method and device for producing a glass blank
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United States of America Patent
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N/A
Issued Date -
Nov 4, 2004
app pub date -
Jun 14, 2004
filing date -
Jun 23, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method and a device whereby optical glass articles can be produced economically and can be reproduced at a high level of contour accuracy and surface quality. The cost effective press technology that is suitable for mass production is maintained, while at the same time, avoiding the associated disadvantages. A multi-phase press process is utilized whereby the final geometry of the blank is achieved iteratively. Accordingly, a pre-blank is produced from a gob of glass that is fed by way of a feeding device to a press device. The press device is a pre-press including a pre-press punch. The pre-press device produces a blank whose geometry, while coming close, does not yet correspond with the desired final geometry. This first press step is followed by a second one, whereby the pre-blank is transformed into the end product. The press process is broken down into two individual press steps.
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