Method for continuously manufacturing optical article
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United States of America Patent
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Nov 9, 2004
Grant Date -
Mar 28, 2002
app pub date -
Sep 24, 2001
filing date -
Sep 28, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There is provided a method for continuously manufacturing an optical article which comprises a first step of thermal press-molding a sheet-like curved body and a second step of insert injection-molding a back resin on a concave side of the sheet-like curved body, while transferring the continuous sheet in a longitudinal direction, using an apparatus for manufacturing an optical article in which a press-molding machine which can thermal press-mold the sheet-like curved body and an insert injection-molding machine equipped with a mold having a curvature similar to that of the sheet-like curved body are serially positioned in this order, wherein a cycle of thermal press-molding and a cycle of insert injection-molding are synchronized to continuously insert-mold the back resin on a concave side of the sheet-like curved body while continuously thermal press-molding the sheet-like curved body.
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