Patent ID: 9643345
Date: 2017-05-09
CPC Classifications: B29C,B29D,B29L

Claim:
1. A resin molding method comprising the steps of: (a) curing a resin material so as to form a resin molded product, the resin material having been supplied between a first transfer surface of a first mold and a second transfer surface of a second mold; (b) separating the first transfer surface from the resin molded product; (c) removing the resin molded product from the second mold; (d) causing an ultrasonic vibrator to apply ultrasonic vibration, from a side surface of the first mold, between the steps (a) and (b) so as to form a first gap at least at a part between the first transfer surface and the resin molded product; and (e) causing an ultrasonic vibrator to apply ultrasonic vibration, from a side surface of the second mold, between the steps (b) and (c) such that only part of the second mold is vibrated so as to form a second gap at least at a part between the second transfer surface and the resin molded product; wherein: the resin molded product comprises one or more lenses; the one or more lenses has an optical surface and a non-optical surface formed on an outer periphery of the optical surface; the gap is formed at least at a part between the non-optical surface and a surface in contact with the non-optical surface but no gap is formed between the optical surface and a surface in contact with the optical surface; in step (b), the first transfer surface is separated from the resin molded product while the gap formed in step (d) serves as a starting point from which the resin molded product and the first transfer surface are separated from each other; in step (b), an arm separates the first mold from the resin molded product so as to make a distance between the first transfer surface of the first mold and a surface of the resin molded product; in step (d), when causing the ultrasonic vibrator to apply ultrasonic vibration from the side surface of the first mold, a projection of the ultrasonic vibrator is inserted into a depression of the side surface of the first mold so that the ultrasonic vibrator is fixed to the first mold; in step (e), when causing the ultrasonic vibrator to apply ultrasonic vibration from the side surface of the second mold, the projection of the ultrasonic vibrator is inserted into a depression of the side surface of the second mold so that the ultrasonic vibrator is fixed to the second mold; and in steps (d) and (e), ultrasonic vibration whose frequency falls within a range of 20 kHz to 60 kHz is applied.