Resin molding apparatus and resin molding method
AssigneeSharp Kabushiki Kaisha
InventorsTakahiro Nakahashi, Hiroyuki Hanato
Life of this patent
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Abstract
A lens molding apparatus (100) of the present invention includes: a mold (1) having a transfer surface (1a) for transferring a predetermined lens shape to a resin material; a mold (2) having a transfer surface (2a) for transferring a predetermined lens shape to the resin material; a support device (3) for moving the mold (1); a heating device (4) curing the resin material so as to form a lens, the resin material having been supplied between the transfer surface (1a) and the transfer surface (2a); and an ultrasonic vibrator (5) applying vibration from a side surface of the mold (1 or 2) so as to form a gap at least at a part between the transfer surface (1a or 2a) and the lens.
Claims1
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.
Dependencies are inferred from the claim text.