WO1997015437A1 - Moule pour mouler une lentille en resine et lentille en resine obtenue au moyen de ce moule - Google Patents

Moule pour mouler une lentille en resine et lentille en resine obtenue au moyen de ce moule Download PDF

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Publication number
WO1997015437A1
WO1997015437A1 PCT/JP1996/003098 JP9603098W WO9715437A1 WO 1997015437 A1 WO1997015437 A1 WO 1997015437A1 JP 9603098 W JP9603098 W JP 9603098W WO 9715437 A1 WO9715437 A1 WO 9715437A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
molding
gasket
lens
resin lens
Prior art date
Application number
PCT/JP1996/003098
Other languages
English (en)
Japanese (ja)
Inventor
Kazunori Kagei
Original Assignee
Asahi Lite Optical Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Lite Optical Co., Ltd. filed Critical Asahi Lite Optical Co., Ltd.
Publication of WO1997015437A1 publication Critical patent/WO1997015437A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/0048—Moulds for lenses
    • B29D11/00528—Consisting of two mould halves joined by an annular gasket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0038—Moulds or cores; Details thereof or accessories therefor with sealing means or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00019—Production of simple or compound lenses with non-spherical faces, e.g. toric faces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00413—Production of simple or compound lenses made by moulding between two mould parts which are not in direct contact with one another, e.g. comprising a seal between or on the edges
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces

Definitions

  • the present invention relates to a shape of a molding for molding a resin lens and a resin lens made by using the molding.
  • a lens having a power in a normal range is manufactured by a casting polymerization molding method, but a prescription lens manufactured based on a spectacle method, particularly a lens having a strong power.
  • Almost all lenses with both sphericity and astigmatism are manufactured from preliminarily manufactured semi-finished lenses by polishing based on eyeglass prescriptions.
  • An eyeglass lens generally has a meniscus shape, and the concave surface is formed by a mold having an arbitrary simple curvature, and is usually formed as an unprocessed surface of a spherical shape, and the convex surface is a predetermined shape. It is formed by a mold polished with high precision in the shape and curvature of the surface, and is formed on a spherical shaped surface corresponding to the mold surface that does not require polishing. When the eyeglass prescription is determined, the unprocessed concave surface is polished based on the prescription, thereby completing and providing a prescription lens desired by the customer.
  • both spherical and astigmatic degrees have a spherical shape, and a lens manufactured by polishing has a drawback that spherical aberration occurs.Because of the intensity number as described above, this spherical aberration The problem is even greater.
  • the convex surface has an aspherical shape such as a hyperboloidal surface or an elliptical surface, or that the concave surface has a toroidal shape.
  • the resin 4 of the lens material is injected using a mold consisting of a pair of molds 7 and 9 for molding both sides of the lens as shown in Fig. 4 and a gasket 8 connecting the two.
  • the molding contact follows the curved surface at the peripheral edge of the molding 7.
  • the gasket 8 was manufactured such that the height H ′ of the contact portion was changed in the circumferential direction and matched with the curved surface E of the mold.
  • the gasket requires a mold because it is manufactured by injection molding, a large number of molds are required to match the mold abutting portion to changes in the aspheric surface and Z or toroidal surface of the mold.
  • the need for molds increased the cost, which led to higher lens costs.
  • the contact surfaces between the gasket 8 and the mold 7 are only two surfaces, E and F, and there is concern about the adhesion. Is increasing.
  • the present invention solves the above-mentioned problems by improving the shape of a molding mold, and provides a molding die used for casting polymerization molding of a resin lens.
  • the type of gasket, and thus the type and number of molds for gasket molding, are reduced, and the adhesion between the mold and the gasket is improved. It is an object of the present invention to solve the same problem and to reduce the cost of the molded resin lens.
  • the present invention relates to a molding mold for a resin lens molding die comprising a pair of moldings for molding both surfaces of a lens and a gasket for joining both moldings, wherein the surface polished precisely is formed. At least one surface of an aspherical surface such as a hyperbolic surface or an elliptical surface and a no- or toroidal surface, at least one surface of a contact portion of the mold with the gasket, is formed to be the same plane. It is characterized by.
  • the gasket connecting the two molds constituting the molding die can be formed so that the contact portion with the mold has a plane corresponding to the same plane. Therefore, it is not necessary to use a different gasket for each mode, and one and the same gasket can be commonly used for each mode. As a result, the type and number of molds for producing gaskets can be greatly reduced, and lens costs can be reduced.
  • the surface of the contact portion between the gasket and the mold may be formed by a surface formed of the same plane and at least two other surfaces adjacent to the surface.
  • the peripheral edge of the mold is precisely polished. It is preferable that the side of the cut surface is notched so that the surface of the contact portion with the gasket is formed as a stepped surface that forms the same plane and a surface that intersects and is adjacent to the surface. New Thereby, the sealing between the mold and the gasket can be further improved.
  • the present invention relates to a molding mold for a resin lens molding die comprising a pair of moldings for molding both surfaces of a lens and a liner interposed between the moldings,
  • the present invention is characterized by a resin lens for spectacles or optical equipment molded by using the molding mold of each of the above inventions, whereby a cost-effective lens can be obtained.
  • FIG. 1 is a sectional view showing a relationship between a mold and a gasket according to an embodiment of the present invention.
  • FIG. 2 is a partially enlarged view of FIG.
  • FIG. 3 is a sectional view of another embodiment of the present invention.
  • FIG. 4 is a cross-sectional view showing the relationship between a mold and a gasket in a conventional molding die.
  • FIG. 1 is a cross-sectional view of a mold used for casting polymerization of a resin lens, showing one embodiment of the present invention.
  • reference numerals 1 and 2 denote a pair of moldings forming both surfaces of the lens
  • reference numeral 3 denotes an annular gasket connecting the moldings 1 and 2.
  • Both the molds 1 and 2 are fitted to the gasket 3 from above and below, and are held at a predetermined interval with the inner protruding portion 3 a of the gasket 3 interposed therebetween.
  • Reference numeral 4 denotes a resin of the lens material, which is injected from the injection port 10 of the gasket 3.
  • FIG. 2 is an enlarged view of a circle indicated by a dashed line in FIG.
  • the mold 1 has a horizontal edge in the figure by forming a notch from the side of the precisely polished surface 5 that becomes the lens molding surface, as the peripheral portion that comes into contact with the gasket 3 is formed.
  • the stepped surface A is formed so as to be present on the same plane over the entire circumference, and the inner surface B adjacent to the surface A and the outer surface C of the mold are orthogonal to the surface A and the gasket 3. It is set so that it can be pressed lightly.
  • the height h of the surface B follows the shape of the aspheric surface such as the hyperbolic surface or the elliptical surface of the precisely polished surface 5 of the mold 1 and the shape of the Z or toroidal surface over the entire circumference of the mold. And change.
  • the above configuration is significantly different from the conventional mold in that the surface A and the surface B are provided on the side of the polished surface 5 of the mold 1. Also, the plane A and the plane B do not necessarily need to be perpendicular to each other, but may be any two planes adjacent to each other in the direction of intersection. As a result, the mold 1 and the gasket 3 are in close contact with each other on the three surfaces A, B, and C, and the sealing performance is improved.
  • the molding surface 6 of the mold 2 has a spherical convex shape based on the optometry. Since the surface of the lens to be polished is molded and a spherical surface having a predetermined radius of curvature may be used, the surface D of the peripheral portion in contact with the gasket 3 must be in the same plane. Become. Therefore, the height H of the inwardly protruding portion 3a serving as a spacer of the gasket 3 is constant.
  • the gasket 3 forms a contact portion between the two molds 1 and 2 and a plane corresponding to the plane A and the plane D existing in the same plane of the both molds on the inner protruding part 3a.
  • the inner protruding portion 3a can be formed at a constant height H, so that it is not necessary to use a different gasket for each mold.
  • FIG. 3 shows an embodiment in which the present invention is applied to a mold for injection molding a resin lens.
  • a liner 13 serving as a stirrer is interposed between the upper and lower moldings 11 and 12.
  • the surface A 1 extends over the entire periphery of the contact portion of the mold 11 with the liner 13, that is, around the mold portion 11 a formed on the precisely polished surface 15 as described above. It is formed so as to exist on the same plane, and an inner surface B 1 adjacent to the surface A 1 is formed so as to be orthogonal to the surface A 1. Also in this case, the height h i of the surface B 1 changes along the shape of the aspheric surface and the Z or toroidal surface of the polished surface 15 over the entire circumference of the mold portion 11a.
  • Mold 12 is polished to a spherical convex surface based on the prescription of optometry.
  • a molding surface 16 for molding the surface to be processed is formed in the mold portion 12a, and around the molding surface 16 which is a contact portion with the liner 13, the surface D1 is the same over the entire circumference. It is formed so as to lie on a plane, and the inner surface G 1 adjacent to the surface D 1 is formed so as to be orthogonal to the surface D 1.
  • the distance between the surface A1 and the surface D1 of both the molds 11 and 12 is constant, and the thickness T of the liner 13 interposed between them is also constant. Also in this case, it is not necessary to change the liner provided between the moldings constituting the molding apparatus for each molding, and the type and number of liners can be reduced.
  • a resin lens for spectacles or optical equipment can be molded at a low cost.
  • the present invention can be implemented by configuring the contact portion between the above-described mold and the gasket or the liner in the same manner as described above even when the objective surface side of the lens is aspherical.
  • the molding has a precisely polished surface composed of a non-spherical surface such as a hyperbolic surface or an elliptical surface and a Z or toroidal surface.
  • a gasket to be combined with a mold one type of the same gasket can be used in common for each mold, and a single type of gasket can be used to cast various lenses. .
  • only one type of mold is required for injection molding the gasket, which is extremely economical, and is very economical for eyeglasses or optical equipment. Resin lenses can be provided at low cost.
  • the number of types of the liner can be reduced, and productivity can be improved as described above.

Abstract

Moule servant à mouler une lentille en résine pour des lunettes ou pour un instrument optique et, plus particulièrement, à effectuer un moulage de précision d'une surface concave afin d'obtenir une surface non sphérique et/ou cycloïdale, telle qu'une surface hyperboloïde ou ellipsoïdale, une configuration de la section transversale d'un joint du moule pouvant être rendue constante et seul un type de joint utilisable habituellement étant nécessaire pour des types respectifs de moules. A cet effet, on forme la surface (A) de la partie du bord périphérique du moule servant à mouler la surface concave en contact avec le joint (3), de façon à ce qu'elle se trouve dans le même plan le long de la totalité de la circonférence du moule et on peut modifier la hauteur d'une surface (B) contiguë à ladite surface (A), de manière à rendre constante la hauteur (H) d'une partie intérieure saillante (a) servant de pièce d'écartement pour le joint. De plus, au moins deux surfaces contiguës à la surface (A) permettent d'améliorer l'efficacité de l'étanchéité entre le joint et le moule.
PCT/JP1996/003098 1995-10-24 1996-10-24 Moule pour mouler une lentille en resine et lentille en resine obtenue au moyen de ce moule WO1997015437A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP27550895A JP3705504B2 (ja) 1995-10-24 1995-10-24 眼鏡用樹脂レンズの注型成形用モールド
JP7/275508 1995-10-24

Publications (1)

Publication Number Publication Date
WO1997015437A1 true WO1997015437A1 (fr) 1997-05-01

Family

ID=17556464

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1996/003098 WO1997015437A1 (fr) 1995-10-24 1996-10-24 Moule pour mouler une lentille en resine et lentille en resine obtenue au moyen de ce moule

Country Status (3)

Country Link
JP (1) JP3705504B2 (fr)
CN (1) CN1085585C (fr)
WO (1) WO1997015437A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7341442B2 (en) 2005-11-18 2008-03-11 Hon Hai Precision Industry Co., Ltd. Mold for molding lenses

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3919293B2 (ja) * 1997-06-24 2007-05-23 アピックヤマダ株式会社 樹脂封止装置
JP6069609B2 (ja) * 2015-03-26 2017-02-01 株式会社リガク 二重湾曲ｘ線集光素子およびその構成体、二重湾曲ｘ線分光素子およびその構成体の製造方法
WO2016208584A1 (fr) * 2015-06-22 2016-12-29 東海光学株式会社 Système de fabrication de verres de lunettes
KR102503006B1 (ko) * 2015-07-24 2023-02-23 토카이 옵티칼 주식회사 안경 렌즈 제조 시스템

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55123430A (en) * 1979-03-19 1980-09-22 Hoya Corp Preparation of lens forming mold
JPH03231814A (ja) * 1990-02-08 1991-10-15 Hoya Corp プラスチックレンズの製造方法及びプラスチックレンズ注型ガスケット

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55123430A (en) * 1979-03-19 1980-09-22 Hoya Corp Preparation of lens forming mold
JPH03231814A (ja) * 1990-02-08 1991-10-15 Hoya Corp プラスチックレンズの製造方法及びプラスチックレンズ注型ガスケット

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7341442B2 (en) 2005-11-18 2008-03-11 Hon Hai Precision Industry Co., Ltd. Mold for molding lenses

Also Published As

Publication number Publication date
JPH09117921A (ja) 1997-05-06
CN1085585C (zh) 2002-05-29
JP3705504B2 (ja) 2005-10-12
CN1166153A (zh) 1997-11-26

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