INJECTION NOZZLE ASSEMBLY FOR OPHTHALMIC DEVICE FORMATION Russian patent published in 2018 - IPC B29D11/00 B29C33/00 

FIELD: physics.

SUBSTANCE: invention relates to a casting nozzle assembly, a method for manufacturing contact lenses, and a mold casting assembly. Technical result is achieved by a casting nozzle unit for formation of ophthalmic device, which contains a mold for casting the front curved surface and a mold for casting a base curved surface. Mold for casting the front curved surface comprises a concave surface of the casting mold located on the upper side of the mold. First flat annular ring having an inner circumference and an outer periphery, the inner periphery surrounding and is adjacent to the perimeter of the concave surface of the casting mold. First ring, located on the first flat annular ring forming the septum. First transition zone located on the outer periphery of the first flat annular ring. First plurality of flat blades located on the first transition zone in the first plane, which is out of plane with the first flat annular ring. Mold for casting the base curved surface comprises a convex surface of the casting mold located on the underside of the mold. Second planar annular ring having an inner circumference and an outer periphery, inner periphery surrounding and being adjacent to the perimeter of the convex surface of the casting mold. Second transition zone located on the outer periphery of the second flat annular ring. Second set of flat blades located on the second transition zone in the second plane that is out of plane with the second flat annular ring. Gap between the first plane and the second plane is greater than the gap between the first flat annular ring and the second flat annular ring, when mold for casting the base curved surface is positioned on the casting mold for the front curved surface.

EFFECT: technical result is to provide a larger area of equipment capture by automated systems to improve the accuracy of positioning of half molds and reduce the number of defects.

12 cl, 7 dwg