| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the quality of a light-transmissive molding by causing a sensor mark formed in a lens produced by injection molding of a resin by a sequential system to be invisible from the outside.SOLUTION: A lens 2 is an injection molding molded by a sequential system comprising detecting a resin injected into a cavity from a first gate with a sensor and injecting a resin from a second gate, and a sensor mark SM is formed on the back surface of the lens 2 at the position where the sensor mark SM overlaps with gate marks GM1 and GM2 formed in individual gates in the surface direction. Overlapping with the gate mark GM2, the sensor mark SM is invisible from the outside.</p> |
