LENS FORMING APPARATUS

摘要

The invention provides a lens forming apparatus that can suppress generation of burrs even if gaps between outer walls of an upper die and a lower die and an inner wall of a trunk die is made wide. A lens forming apparatus 11 according to the present invention includes a trunk die 12 having a through-hole 17 therein; first and second dies 13 and 14 that are fitted into the through-hole 17 from both ends thereof, respectively, and have pressing surfaces 20 and 30 for sandwiching and pressing a forming material 24; and induction-heating coils 15 and 16 that heat the first and second dies 13 and 14 to a temperature equal to or higher than a glass transition point, in a state where the trunk die 12 is not heated and the temperature thereof is set to a temperature equal to or lower than the glass transition point.

主权项

1. A lens forming apparatus comprising:
a trunk die having a through-hole; first and second dies that are fitted into the through-hole from both ends thereof, respectively, and has pressing surfaces capable of sandwiching and pressing a forming material formed on opposed surfaces thereof; and a heating control unit that is controlled to heat the first and second dies to a temperature equal to or higher than a glass transition point, in a state where the trunk die is not heated and the temperature thereof is set to a temperature equal to or lower than the glass transition point.