| 摘要 |
The disclosed embodiments include a system, mold (200) and method for forming an ophthalmic lens having reduced risk of optical defects. An illustrative injection molding system includes a heated sprue and a hot runner fluidly coupled to the heated sprue. The system also includes a mold fluidly coupled to the heated runner to receive a molten material. The mold includes a material conduit (204), which may be included in an interchangeable gate insert, and a lens cavity (202). The hot runner forms a material conduit having an inlet (206) for receiving material from the heated sprue and an outlet (208) for delivering material to the lens cavity. The material conduit also includes a branch cavity (210) disposed between the inlet and the outlet for receiving a diverted volume of degraded lens material. |
