Press-forming die and method for manufacturing optical element
A technology of stamping and forming and optical components, applied in the field of stamping and forming molds, can solve the problems of lack of forming accuracy, deviation of the optical surface of glass lens, etc., and achieve the effect of high forming accuracy and preventing lateral movement.
Active Publication Date: 2017-09-01
HOYA CORP
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Problems solved by technology
[0003] However, when a glass lens is molded using such a press mold, the glass material moves laterally when the upper mold is pushed, and the optical surface of the molded glass lens deviates, so that sufficient molding accuracy cannot be obtained.
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[0056] Hereinafter, a first embodiment of the press molding die of the present invention will be described in detail with reference to the drawings.
[0057] figure 1 It is a vertical sectional view showing the press molding die according to the first embodiment of the present invention. As shown in the figure, the press molding die 1 of this embodiment has: an upper die 2 having a molding surface 12A corresponding to the upper surface of the optical element at its lower part; Corresponding molding surface 16A; The 1st mold cover 6 (outer mold cover), it is located at the outer periphery of upper mold 2 and lower mold 4; And the 2nd mold cover 8 (inner mold cover), it is located at the outer periphery of upper mold and Inside the first mold case 6, there is a constraining portion 18 constraining the side portion of the glass material. The press molding die 1 of the present embodiment is used to manufacture a meniscus lens having a convex shape on one side and a concave shap...
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The invention provides a press-forming die and a method for manufacturing an optical element, capable of preventing lateral movement of an optical material and manufacturing an optical element with high molding precision when an optical element is formed by using a press-forming die having an upper die, a lower die, and a die sleeve. The press-forming die (1), for forming a glass lens, comprises a lower die (4) having a forming surface (16A) facing upward for forming a lower surface of the glass lens; an upper die (2) having a forming surface (12A) facing downward, facing the forming surface (16A) of the lower die (4), for forming an upper surface of the glass lens; and a second die sleeve (8) having a cylindrical shape and having a restraining portion (18) for restraining a side portion of the glass lens on an inner peripheral side at the time of pressing, wherein the restraining portion (18) of the second die sleeve (8) has a first lower surface (20) formed so as to face the lower die (4); and a second lower surface (22) formed lower than the first lower surface (20) and formed so as to face the lower die (4).
Description
technical field [0001] The invention relates to a stamping mold and a manufacturing method of an optical element, in particular to a stamping mold with an upper mold, a lower mold and a mold sleeve and a manufacturing method of an optical element using the stamping mold. Background technique [0002] Conventionally, as a method of manufacturing optical elements such as glass lenses, a method of forming them using a press molding die having a lower mold having a molding surface facing upward for molding the lower surface of the optical element has been adopted. and an upper mold having a molding surface for molding the upper surface of the optical element and facing downward. Glass material such as a preform is placed on the molding surface of the lower mold, and the upper mold is lowered downward to press the glass material, whereby the molding surfaces of the upper mold and the lower mold are transferred to the upper and lower surfaces of the glass material, and glass lense...
Claims
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IPC IPC(8): C03B11/08
CPCC03B11/08C03B2215/48C03B11/122Y02P40/50Y02P40/57
Inventor 陈德成安彦健也白石幸一郎
Owner HOYA CORP