Process and device for the manufacture of mouldings

Details Process and device for the manufacture of mouldings Process and device for the manufacture of mouldings

1996-08-13

1998-07-21

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264 138, 264 22, 264496, 264335, 4251744, 425437, 425444, 425449, 425808, B29D 1100

Patent

active

057824606

ABSTRACT:
In a process for the manufacture of mouldings, especially optical lenses, specifically contact lenses (CL), a starting material that is crosslinkable by the impingement of suitable energy is introduced into a mould (1) having a cavity (15), which mould is at least partially permeable to the energy concerned. The starting material is introduced into the cavity in a still at least partially uncrosslinked state, the mould cavity determining the shape of the moulding (CL) to be produced. By means of impingement of the energy concerned, the starting material is crosslinked to an extent sufficient for it to be possible for the moulding (CL) to be released from the mould. The filling of the mould cavity is carried out in the starting material that is still at least partially in the uncrosslinked state.

REFERENCES:
patent: 3380718 (1968-04-01), Neefe
patent: 3841598 (1974-10-01), Grucza
patent: 4113224 (1978-09-01), Clark
patent: 4693446 (1987-09-01), Orlosky
patent: 4712765 (1987-12-01), Sabet
patent: 4842782 (1989-06-01), Portney et al.
patent: 5114114 (1992-05-01), Hara
patent: 5218013 (1993-06-01), Schock
patent: 5281372 (1994-01-01), Hayashi et al.

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