Optical product molding apparatus and manufacturing method
An optical product and optical technology, which is applied in the field of forming devices for optical products, can solve problems such as quality deviation and poor appearance
Inactive Publication Date: 2018-01-02
KONICA MINOLTA INC
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Problems solved by technology
As methods to achieve high transferability, there are thermal cycle method, gas-assisted molding method, heat insulation molding method, and improvement of injection conditions. By improving the fluidity and filling pressure of the resin, the resin enters the normal molding and does not The gap between the sliding cores that cannot be entered, so there is a situation where the appearance is poor due to the generation of burrs
Due to the generation of such burrs, there will also be the following problems: it is easy to cause quality deviation of each molding shot
That is to say, Patent Document 7 is about preventing the resin from entering the gaps of the sliding core and the like due to insufficient pressure to form burrs when the optical transfer surface formed on the sliding core and the like is prevented from being deformed and deteriorated by pressurization. method has not been made public
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[0038] Hereinafter, embodiments of the molding apparatus of the optical product and the manufacturing method thereof according to the present invention will be described with reference to the accompanying drawings.
[0039] figure 1 It is a schematic diagram explaining the main part of the shaping|molding apparatus of an optical product. in addition, figure 1 also includes the following figure 2 The portion corresponding to the AA section of the forming die shown.
[0040] The optical product molding apparatus 100 includes a molding die 40 , a die attachment mechanism 50 , and a control device 30 .
[0041] The forming die 40 includes a first die 41 and a second die 42 . The first mold 41 on the movable side of the forming mold 40 can be reciprocated in the opening and closing direction, that is, the AB direction by a mechanism to be described later. As shown in the figure, by moving the first mold 41 in the A direction (upper side in the drawing), the first mold 41 and th...
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Provided are an optical product molding apparatus, etc. with which deformation of an optical transfer surface can be prevented while preventing burr formation. The molding apparatus (100) is providedwith a molding die (40) comprising sliding cores (72), contact pressure sensors (54) for measuring the contact pressure of the contact surfaces (72p) of the sliding cores (72), position adjustment units (59) for adjusting the positions of the sliding cores (72), and a position adjustment control unit (33). Since the position adjustment units (59) secure the gap (GA) between the sliding cores (72)at the beginning of resin injection in the molding step, it is possible to force out air remaining inside the cavity (CV). Moreover, since the sliding cores (72) are brought into contact with each other by the position adjustment units (59) prior to completion of resin injection on the basis of the output of the contact pressure sensors (54), it is possible to keep contact pressure from becoming excessive due to butting of the sliding cores (72) and the inside surfaces (72a), which are optical transfer surfaces, from being deformed.
Description
technical field [0001] The present invention relates to a molding apparatus and a manufacturing method of an optical product capable of high-precision molding, and more particularly, to a molding apparatus and a manufacturing method of an optical product including a mold having a sliding core that can move in the mold. Background technique [0002] Disclosed is a resin molding die provided with an insert capable of applying a compressive force to resin from the inner side of a die portion for forming a mirror surface with an injected resin as a device for improving the surface accuracy of an optical transfer surface such as a polygon mirror. parts and drive mechanism (Patent Document 1). [0003] In addition, a method of manufacturing a polygon mirror having a chamfered portion at a ridgeline position or the like is disclosed (Patent Document 2). In this manufacturing method, by providing the chamfered portion and reducing the pressure immediately before the resin filling i...
Claims
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Login to View More IPC IPC(8): B29C45/33B29C45/80
CPCB29C45/33B29C45/80
Inventor田村义文高木信泽登大介谷川裕海高桥洋昭佐藤望荒樋悟郎阿部良幸
OwnerKONICA MINOLTA INC