| 摘要 |
PROBLEM TO BE SOLVED: To provide a means for easily performing the replacement of an injection pipe in the production of a plastic lens, and a method for reducing foam or optical chipped defects from a raw material liquid having high viscosity and a high initial polymerization speed. SOLUTION: This injection device for injecting the raw material liquid in a mold for molding the plastic lens comprises a discharge part for mixing the raw material liquid containing a plurality of monomers to discharge it from a discharge port, a plurality of injection pipes having through-holes for allowing the raw material liquid to flow from one ends of the through-holes to the other ends thereof and a replacing means for replacing each of the injection pipe (discharge port connecting injection pipes) connected to each of the discharge ports at one end thereof with an injection pipe (replacing injection pipe) used for replacing each of the discharge port connecting injection pipes. The replacing means comprises a standby holding part for holding the end part of the replacing injection pipe, a connecting and holding part for holding the end part of each of the discharge port connecting injection pipes in the state connected to each of the discharge ports and a moving means for moving the end part of the replacing injection pipe held to the standby holding part to connect the same to each of the discharge ports and releasing the connection of each of the discharge port connecting injection pipes, which is connected to each of the discharge ports, with each of the discharge ports. COPYRIGHT: (C)2006,JPO&NCIPI |
