
Molded Glass Optics 185
© 2011 by Taylor & Francis Group, LLC
5.5.1.1 Transfer Molding
A special type of machine has been developed for high-volume small lenses.
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These machines are referred to as glass molding transfer presses. Transfer
molding machines operate on the same principles as the standard molding
concept but are designed to accelerate the delivery or cycle time between
lenses. The machines accomplish this, not by speeding up the process, but by
creating many “stations” that transfer from step to step. This is accomplished
by having many stations or mold sets that move through the molding cycle.
The preforms are loaded at the r ...