B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
B29D 11/00 (2006.01) B29C 45/00 (2006.01) G02C 7/04 (2006.01)
Patent
CA 2213185
An injection molding process for molding an assembly of a frontcurve molds in a plurality of unitary solid piece of polymer in which plurality of frontcurve molds are arranged symmetrically around a single center polymer injection gate. In this arrangement the molten polymer flows radially outwardly therefrom uniformly in all directions to the four frontcurves to form one common molded piece of polymer. In a compression injection molding process, the pressure on the molten polymer is maintained relatively constant, and the mold is mechanically collapsed during the molding operation. The present invention molds an assembly of frontcurve molds in a manner in which there is a significant reduction of residual stress locked into the resultant assembly of frontcurve molds. This results in a significant reduction in warpage and shrinkage of each frontcurve mold, which is not optically stressed, and results in a subsequent casting of an ophthalmic lens which is not optically stressed. Moreover, the assembly of frontcurve molds can function as its own support pallet for product placement and alignment purposes during subsequent production operations.
Boone Daniel G.
Jones Dennis M.
Labelle Robert E.
Lust Victor
Petit Robert G.
Johnson & Johnson Vision Care Inc.
Johnson & Johnson Vision Products Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
LandOfFree
Multiple optical curve molds formed in a solid piece of polymer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multiple optical curve molds formed in a solid piece of polymer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple optical curve molds formed in a solid piece of polymer will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-2035955