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We have developed Sumitomo Micro Molding Device
"NANO-Press", which produces optical elements with
a high degree of accuracy at high throughput by press
molding.
The device has the following features and functions.
1) A newly developed linear pneumatic servo actuator
controls very precisely the position of a molding press
spindle and molding press pressure.
2) Heating and cooling of metal molds are optimized by
infrared heating using a condensing mirror and by a
mold clamping mechanism. Mold temperature is precisely
controlled through a feedback control system.
3) Press molding is done under vacuum as well as an
inert environment.
4) The press molding process is divided into several steps
in order to accommodate a number of metal molds for
enhancing productivity. The metal molds are sequentially
transferred to individual steps.
5) The transfer device of metal molds is standard equip-
ment. It enables an automatic operation to take out
and feed metal molds into or out of individual mold steps
and to pick up vitreous materials. |
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