Patent ID: 8000021

Claim:
A lens manufacturing apparatus comprising: a first mold comprising a first body having a first parting surface and an opposite first end surface, and a first compartment spanning from the first parting surface to the first end surface; the first parting surface defining a first half sprue; a second mold comprising a second body having a second parting surface and an opposite second end surface, and a second compartment spanning from the second parting surface to the second end surface; the second parting surface defining a second half sprue corresponding to the first half sprue of the first mold, and the second parting surface contacted to the first parting surface of the first mold to align with the first mold; a first core inserted into the first compartment of the first mold, and comprising a first mold surface formed with a first half-mold cavity and a conic ring surrounding the first half-mold cavity; the first mold surface is lower than the first parting surface of the first mold; and a second core inserted into the second compartment of the second mold, and comprising a second mold surface formed with a second half-mold cavity, wherein the bottom of the second half-mold cavity is connected to the periphery of the second mold surface by an acclivitous surface, and the acclivitous surface is parallel to the outermost conic surface of conic ring.