| 摘要 |
A plant is proposed for the production of organic lenses inside moulds constituted by pairs of matching half-moulds kept spaced apart and linked with each other by annular links of plastic material,inside whose cavity a suitable plastic material, to be made polymerize before the drawing of the lenses, is intended to be introduced. After having been started and put under steady state running conditions, the plant carries out automatically the following operations: assembling of the moulds with selected links; control of the centering of the two mould component parts; delivery of the assembled moulds to a filling machine, into a polymerization tank and into maintenance tanks; removal of the links by tearing up from the moulds; transfer of the link-free moulds, with the lenses formed inside them, into washing tanks; drawing of the lenses; delivery of the lenses to an optical check station, and discharging of the finished lenses; recycling of the half-mould pairs. From the optical check of the formed lenses a command is emitted for the selection of the links to be assembled with the respective half-mould pairs. A closed-loop conveyor with sucker holding elements, intermittently running, brings the moulds to successive operating stations. Between the drawing station and the stations for the assemblage of the half-mould pairs with the respective links, intermediate stations are provided for the loading and the possible replacement of half-mould pairs. |
