METHOD AND MOLD FOR FABRICATING CONTACT LENS AND CONTROLLING EXCESS MATERIAL AND METHOD FOR FABRICATING THE SAME MOLD

摘要

The present invention discloses a method and mold for fabricating a contact lens and controlling excess material and a method for fabricating the same mold and comprises steps: fabricating a first mold having a mold cavity and a side wall formed around the rim of the mold cavity and having protuberances, fabricating a second mold having a round protrusion; using a disc-shape cutter to cut the side wall and protuberances and form a groove; placing a liquid contact lens material in the mold cavity; matching the round protrusion with the mold cavity to make the liquid contact lens material have a spherical shell shape with the curvature of the round protrusion and make the residual material flow to the groove and between two protuberances. Thereby, all the excess material are attached to the first mold and separated together with the first mold from the second mold in demolding.

主权项

1. A method for fabricating a contact lens and controlling excess material thereof, comprising steps:
providing a first mold and a second mold, wherein said first mold has a mold cavity, and wherein a side wall is formed around a rim of said mold cavity, and wherein said side wall has a plurality of protuberances, and wherein a groove is annularly formed on said side wall and transversely passes said protuberances, and wherein said second mold has a round protrusion; placing a liquid contact lens material in said mold cavity of said first mold; and matching said second mold with said first mold to place said round protrusion inside said mold cavity, and pressing down said second mold to make said liquid contact lens material have a spherical shell shape and extrude residual said liquid contact lens material to said groove and between two said protuberances.