Lens molding was taken to a new dimension of precision at the recent IPF Show in Japan by Fanuc (At the Foot of Mt. Fuji, Japan) with its Roboshot S-2000i30B press molding 3-mm-diameter lenses for smartphones from cyclic olefin copolymer (COC) resin. Nowadays, smartphones require up to eight such lenses.
The press operating at IPF featured large linear guides on the clamp end as part of a high precision clamping option, while servo-driven nozzle touch was also employed to reduce platen bending. According to Fanuc Senior Development Engineering Satoshi Takatsugi, mold stability is advanced even further through the use of 30-mm-thick temperature control plates placed between the mold halves and the platens to smooth out the temperature gap between the tool (140°C) and the platens....