JPH06106552A - Manufacturing mold of contact lens - Google Patents
Manufacturing mold of contact lensInfo
- Publication number
- JPH06106552A JPH06106552A JP4259647A JP25964792A JPH06106552A JP H06106552 A JPH06106552 A JP H06106552A JP 4259647 A JP4259647 A JP 4259647A JP 25964792 A JP25964792 A JP 25964792A JP H06106552 A JPH06106552 A JP H06106552A
- Authority
- JP
- Japan
- Prior art keywords
- contact lens
- molding member
- mold
- male
- female
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 59
- 238000000465 moulding Methods 0.000 claims abstract description 163
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 79
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 230000000977 initiatory effect Effects 0.000 claims 1
- 239000000178 monomer Substances 0.000 description 17
- 238000010521 absorption reaction Methods 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- -1 polypropylene Polymers 0.000 description 7
- 230000008602 contraction Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 5
- 230000002950 deficient Effects 0.000 description 5
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000012778 molding material Substances 0.000 description 4
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- IMDPTYFNMLYSLH-UHFFFAOYSA-N 3-silylpropyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCC[SiH3] IMDPTYFNMLYSLH-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- BYXKJWZJPAGNAD-UHFFFAOYSA-N (1,2-dihydroxy-6-silylhexan-3-yl) 2-methylprop-2-enoate Chemical compound C(C(=C)C)(=O)OC(C(O)CO)CCC[SiH3] BYXKJWZJPAGNAD-UHFFFAOYSA-N 0.000 description 1
- QTKPMCIBUROOGY-UHFFFAOYSA-N 2,2,2-trifluoroethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC(F)(F)F QTKPMCIBUROOGY-UHFFFAOYSA-N 0.000 description 1
- RSVZYSKAPMBSMY-UHFFFAOYSA-N 2,2,3,3-tetrafluoropropyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC(F)(F)C(F)F RSVZYSKAPMBSMY-UHFFFAOYSA-N 0.000 description 1
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- RZXDTJIXPSCHCI-UHFFFAOYSA-N hexa-1,5-diene-2,5-diol Chemical compound OC(=C)CCC(O)=C RZXDTJIXPSCHCI-UHFFFAOYSA-N 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- UACSZOWTRIJIFU-UHFFFAOYSA-N hydroxymethyl 2-methylprop-2-enoate Chemical group CC(=C)C(=O)OCO UACSZOWTRIJIFU-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- QRWZCJXEAOZAAW-UHFFFAOYSA-N n,n,2-trimethylprop-2-enamide Chemical compound CN(C)C(=O)C(C)=C QRWZCJXEAOZAAW-UHFFFAOYSA-N 0.000 description 1
- 229940088644 n,n-dimethylacrylamide Drugs 0.000 description 1
- YLGYACDQVQQZSW-UHFFFAOYSA-N n,n-dimethylprop-2-enamide Chemical compound CN(C)C(=O)C=C YLGYACDQVQQZSW-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 239000011116 polymethylpentene Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- BOQSSGDQNWEFSX-UHFFFAOYSA-N propan-2-yl 2-methylprop-2-enoate Chemical compound CC(C)OC(=O)C(C)=C BOQSSGDQNWEFSX-UHFFFAOYSA-N 0.000 description 1
- LYBIZMNPXTXVMV-UHFFFAOYSA-N propan-2-yl prop-2-enoate Chemical compound CC(C)OC(=O)C=C LYBIZMNPXTXVMV-UHFFFAOYSA-N 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- SJMYWORNLPSJQO-UHFFFAOYSA-N tert-butyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(C)(C)C SJMYWORNLPSJQO-UHFFFAOYSA-N 0.000 description 1
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はコンタクトレンズの成形
に使用するコンタクトレンズ製造用型に関し、特に注型
重合に使用するコンタクトレンズ製造用型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact lens manufacturing mold used for molding contact lenses, and more particularly to a contact lens manufacturing mold used for cast polymerization.
【０００２】[0002]
【従来の技術】従来より、注型重合法はコンタクトレン
ズの製造方法として広く使用されており、切削研磨製
法、スピンキャスト製法などと比べ製造しようと意図し
た通りのレンズパラメータ（屈折度，ベースカーブ，肉
厚，外径）を有するコンタクトレンズを歩留り良く製造
でき、生産性も高い。2. Description of the Related Art Conventionally, a casting polymerization method has been widely used as a method for manufacturing a contact lens, and compared with a cutting and polishing method, a spin casting method, etc., lens parameters (refractive index, base curve) that are intended to be manufactured are obtained. , Thickness, outer diameter), it is possible to manufacture contact lenses with good yield and high productivity.
【０００３】一方、注型重合法では重合収縮が発生し、
そのままではひけを発生するので、重合収縮を補正する
ことが高品質なコンタクトレンズを製造する上で重要な
技術となる。On the other hand, in the cast polymerization method, polymerization shrinkage occurs,
Since a sink mark is generated as it is, correcting the polymerization shrinkage is an important technique for manufacturing a high quality contact lens.
【０００４】重合収縮を補正するコンタクトレンズ製造
用型としては以下のようなものが知られている。第１の
コンタクトレンズ製造用型は、特公昭５９−２９４１１
号に示されたものである。図８はこのコンタクトレンズ
製造用型の概要を示す図である。コンタクトレンズ製造
用型は雄型４１と、雌型４３が嵌合するようになってお
り、コンタクトレンズの凹面を成形する成形面４２と凸
面を成形する成形面４４によって、コンタクトレンズ成
形空間を形成している。そして前記成形面４２の外周に
可撓性のリム４５を設けている。The following molds are known as a mold for manufacturing a contact lens for correcting polymerization shrinkage. The first contact lens manufacturing mold is Japanese Patent Publication No. 59-29411.
It is shown in the issue. FIG. 8 is a diagram showing an outline of this contact lens manufacturing mold. The mold for contact lens production is adapted to fit a male mold 41 and a female mold 43, and a contact lens molding space is formed by a molding surface 42 for molding a concave surface and a molding surface 44 for molding a convex surface of a contact lens. is doing. A flexible rim 45 is provided on the outer periphery of the molding surface 42.
【０００５】図９は図８のリム４５近傍の詳細図であ
る。重合により体積収縮が起こると、リム４５は可撓性
であるので、図９に示すように内側に撓み、重合収縮を
補正し、ひけを防止する。FIG. 9 is a detailed view near the rim 45 of FIG. When the volume contraction occurs due to the polymerization, the rim 45 is flexible, so that it flexes inward as shown in FIG. 9 to correct the polymerization contraction and prevent the sink mark.
【０００６】第２のコンタクトレンズ製造用型は、特表
平１−５００２５６号に示されたものである。図１０は
このコンタクトレンズ製造用型の概要を示す図である。
コンタクトレンズ製造用型は雄型５１と、雌型５３が嵌
合するようになっており、コンタクトレンズの凹面を構
成する成形面５２と凸面を形成する成形面５４によっ
て、コンタクトレンズ成形空間を形成している。そし
て、成形面５２はダイヤフラムになっている。The second contact lens manufacturing mold is shown in Japanese Patent Publication No. 1-500256. FIG. 10 is a diagram showing an outline of this contact lens manufacturing mold.
The male mold 51 and the female mold 53 are fitted in the contact lens manufacturing mold, and the contact lens molding space is formed by the molding surface 52 forming the concave surface of the contact lens and the molding surface 54 forming the convex surface. is doing. The molding surface 52 is a diaphragm.
【０００７】重合中に、成形面５２のショルダー５５と
成形面５４を線接触させたまま、重合収縮力により成形
面５２すなわちダイヤフラムを点線５２ａのように変形
させることで、重合収縮を補正している。During the polymerization, while the shoulder 55 of the molding surface 52 and the molding surface 54 are in line contact with each other, the molding contraction force is corrected by deforming the molding surface 52, that is, the diaphragm, by the polymerization contraction force. There is.
【０００８】これらのコンタクトレンズ製造用型は重合
収縮によるコンタクトレンズのひけを防止する点では効
果が得られる。These contact lens manufacturing molds are effective in preventing contact lens sink due to polymerization shrinkage.
【０００９】[0009]
【発明が解決しようとする課題】しかし、第１のコンタ
クトレンズ製造用型では、リム４５が直接コンタクトレ
ンズのエッジを形成するので、コンタクトレンズをデザ
インする上で多くの制約があり、例えば、得られるコン
タクトレンズの周縁部形状が前記リムの折れ曲がりをそ
のまま写し取るため、眼に装着した場合、装用者に異物
感を生じさせることがある。また、可撓性のリム４５は
非常にデリケートにできているために、重合収縮の際、
歪み易く、エッジが不良になり易い。However, in the first contact lens manufacturing die, since the rim 45 directly forms the edge of the contact lens, there are many restrictions in designing the contact lens. Since the shape of the peripheral portion of the contact lens to be copied reflects the bending of the rim as it is, when worn on the eye, the wearer may feel a foreign body. In addition, since the flexible rim 45 is very delicate, it is
It is easily distorted and the edges are likely to be defective.
【００１０】一方、第２のコンタクトレンズ製造用型で
は、成形面５２すなわちダイヤフラムを変形させること
により重合収縮を補正しているので、成形面５２の変形
を見込んだ成形型の設計が必要になる。さらに、成形面
５２の変形量を正確に制御することは非常に難しく、ダ
イヤフラムがコンタクトレンズの光学面を形成するの
で、コンタクトレンズのベースカーブ、屈折度、肉厚が
一定しないという問題がある。On the other hand, in the second contact lens manufacturing mold, since the polymerization shrinkage is corrected by deforming the molding surface 52, that is, the diaphragm, it is necessary to design the molding die in consideration of the deformation of the molding surface 52. . Further, it is very difficult to accurately control the amount of deformation of the molding surface 52, and since the diaphragm forms the optical surface of the contact lens, there is a problem that the base curve, the degree of refraction, and the wall thickness of the contact lens are not constant.
【００１１】本発明はこのような点に鑑みてなされたも
のであり、重合収縮によるひけを確実に防止できるとと
もに得ようとするベースカーブ、屈折度を有する所望の
コンタクトレンズをばらつきなく製造することができる
コンタクトレンズ製造用型を提供することを目的とす
る。The present invention has been made in view of the above circumstances, and it is possible to reliably prevent sink marks due to polymerization shrinkage and to manufacture a desired contact lens having a desired base curve and refractive index without variation. It is an object of the present invention to provide a contact lens manufacturing mold capable of producing the above.
【００１２】また、本発明の他の目的は正確なレンズエ
ッジの得られるコンタクトレンズ製造用型を提供するこ
とである。さらに、本発明の他の目的は正確な厚さのコ
ンタクトレンズが得られるコンタクトレンズ製造用型を
提供することである。Another object of the present invention is to provide a mold for manufacturing a contact lens capable of obtaining an accurate lens edge. Still another object of the present invention is to provide a contact lens manufacturing mold that can obtain a contact lens having an accurate thickness.
【００１３】[0013]
【課題を解決するための手段】本発明では上記目的を達
成するために、コンタクトレンズの凹面を形成する雄型
成形部材と、凸面を形成する雌型成形部材とを有し、前
記雄型成形部材と前記雌型成形部材を嵌合させ、前記凹
面と前記凸面によってコンタクトレンズ成形空間を形成
するコンタクトレンズ製造用型において、前記コンタク
トレンズ成形空間より外側で、かつ嵌合面より内側の領
域に、前記雄型成形部材、前記雌型成形部材の一方ある
いは双方に、前記雄型成形部材及び前記雌型成形部材の
重合開始時の間隔を規定し、重合の進行に従って変形す
ることにより重合収縮を吸収する重合収縮吸収構造部を
設けたことを特徴とするコンタクトレンズ製造用型が提
供される。In order to achieve the above-mentioned object, the present invention has a male molding member that forms a concave surface of a contact lens and a female molding member that forms a convex surface. In a contact lens manufacturing mold in which a member and the female molding member are fitted to each other to form a contact lens molding space by the concave surface and the convex surface, in a region outside the contact lens molding space and inside the fitting surface. In one or both of the male molding member and the female molding member, the interval at the start of polymerization of the male molding member and the female molding member is defined, and the polymerization shrinkage is caused by deformation as the polymerization progresses. Provided is a mold for manufacturing a contact lens, which is provided with a polymerization shrinkage absorbing structure for absorbing.
【００１４】また、前記雄型成形部材あるいは前記雌型
成形部材のいずれかのコンタクトレンズ成形面周縁部
に、コンタクトレンズの周縁部を形成する非可撓性の肩
部を設けたことを特徴とするコンタクトレンズ製造用型
が、提供される。Further, a non-flexible shoulder portion forming a peripheral portion of the contact lens is provided on a peripheral portion of a contact lens molding surface of either the male molding member or the female molding member. A contact lens manufacturing mold is provided.
【００１５】さらに、前記コンタクトレンズ成形空間よ
り外側で、かつ前記嵌合面より内側の領域に、前記雄型
成形部材、前記雌型成形部材の一方あるいは前記雄型成
形部材及び前記雌型成形部材に前記コンタクトレンズの
厚さを規定するための突き当て構造部を設けたことを特
徴とするコンタクトレンズ製造用型が、提供される。Further, one of the male molding member, the female molding member, or the male molding member and the female molding member is provided outside the contact lens molding space and inside the fitting surface. Provided is a mold for manufacturing a contact lens, which is provided with an abutting structure for defining the thickness of the contact lens.
【００１６】[0016]
【作用】雄型成形部材と雌型成形部材の間隔は、モノマ
ーの重合収縮力により狭まろうとするが、重合収縮吸収
構造部がモノマーの収縮分に当たる量だけ変形すること
により重合収縮を吸収し、型を軸方向に接近させるの
で、重合収縮によるひけを確実に防止できる。そして、
この重合収縮吸収構造部の変形が、重合による体積縮小
の全てを補償するため、レンズ成形面等に変形などの影
響を与えることがない。その結果、ベースカーブ、屈折
度が目的通り正確なレンズが成形できる。[Function] Although the distance between the male molding member and the female molding member tends to be narrowed by the polymerization shrinkage force of the monomer, the polymerization shrinkage absorbing structure absorbs the polymerization shrinkage by deforming by the amount corresponding to the shrinkage amount of the monomer. Since the molds are brought close to each other in the axial direction, sink marks due to polymerization shrinkage can be surely prevented. And
The deformation of the polymerization shrinkage absorption structure portion compensates for all the volume reduction due to the polymerization, and therefore does not affect the lens molding surface or the like. As a result, it is possible to mold a lens having a base curve and a refractivity that are accurate as desired.
【００１７】また、雄型成形部材あるい雌型成形部材の
いずれかのコンタクトレンズ成形面周縁部に、コンタク
トレンズの周縁部を形成する非可撓性の肩部を設けるこ
とにより、この肩部でエッジが形成されるので、正確な
コンタクトレンズのエッジが成形できる。Further, by providing a non-flexible shoulder portion forming the peripheral portion of the contact lens on the peripheral portion of the contact lens molding surface of either the male molding member or the female molding member, the shoulder portion is formed. Since the edge is formed by, the accurate edge of the contact lens can be formed.
【００１８】さらに、突き当て構造部により、レンズ成
形面等に影響を与えることなく、かつ正確にコンタクト
レンズの厚さが決定できる。Further, the abutting structure allows the thickness of the contact lens to be accurately determined without affecting the lens molding surface and the like.
【００１９】[0019]
【実施例】以下、本発明の一実施例を図面に基づいて説
明する。図１は本発明の第１実施例のコンタクトレンズ
製造用型の垂直断面図であり、図２は重合前の図１の部
分拡大図であり、（Ａ）は部分拡大図、（Ｂ）は肩部近
傍の詳細図、（Ｃ）は突起体の詳細図であり、図３は重
合完了後の図１の部分拡大図であり、（Ａ）は部分拡大
図、（Ｂ）は肩部近傍の詳細図、（Ｃ）は突起体の詳細
図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a vertical sectional view of a contact lens manufacturing mold according to a first embodiment of the present invention, FIG. 2 is a partially enlarged view of FIG. 1 before polymerization, (A) is a partially enlarged view, and (B) is FIG. 3 is a detailed view of the vicinity of the shoulder, FIG. 3C is a detailed view of the protrusion, FIG. 3 is a partially enlarged view of FIG. 1 after the completion of polymerization, FIG. 3A is a partially enlarged view, and FIG. And (C) is a detailed view of the protrusion.
【００２０】図１に示すように、コンタクトレンズ製造
用型１は、雄型成形部材１０と雌型成形部材２０の２つ
部材が互いに嵌合するように構成されている。雌型成形
部材２０は、コンタクトレンズの凸面側（前面側）光学
面を成形するための雌型成形面２１ａを有する雌型成形
面部２１、雌型成形部材２０全体を支える外側壁２２、
外側壁２２を安定に保持設置する底部２３及び雌型成形
面部２１と外側壁２２を連結する雌型連結部２４を有し
ている。As shown in FIG. 1, the contact lens manufacturing mold 1 is constructed such that two members, a male molding member 10 and a female molding member 20, are fitted to each other. The female molding member 20 includes a female molding surface portion 21 having a female molding surface 21a for molding the convex side (front side) optical surface of the contact lens, an outer wall 22 supporting the entire female molding member 20,
It has a bottom part 23 for stably holding and installing the outer side wall 22 and a female mold connecting part 24 for connecting the female mold forming surface part 21 and the outer wall 22.
【００２１】一方、雄型成形部材１０は、コンタクトレ
ンズの凹面側（後面側）光学面を成形するための雄型成
形面１１ａを有する雄型成形面部１１、雄型成形部材１
０全体を支える外側壁１２、外側壁１２の根元にあるフ
ランジ部１３、雄型成形面部１１と外側壁１２を連結す
る雄型連結部１４を有している。On the other hand, the male molding member 10 includes a male molding surface portion 11 having a male molding surface 11a for molding the concave (rear surface) optical surface of the contact lens, and the male molding member 1
0 has an outer side wall 12 that supports the entire body 0, a flange portion 13 at the root of the outer side wall 12, a male type molding surface portion 11 and a male type connecting portion 14 that connects the outer side wall 12.
【００２２】また、雄型成形部材１０の外側壁１２の内
面１２ａと、雌型成形部材２０の外側壁２２の外面２２
ａとは、嵌合しており、上下方向に摺動可能なシリンダ
構造となっている。Further, the inner surface 12a of the outer wall 12 of the male molding member 10 and the outer surface 22 of the outer wall 22 of the female molding member 20.
a is fitted and has a vertically slidable cylinder structure.
【００２３】そして、雄型連結部１４の下面１４ａには
重合吸収構造部である円環状の突起体１５が形成されて
いる。突起体１５は、後述するようにコンタクトレンズ
のモノマー組成物を重合した際に、雌型連結部２４の上
面２４ａと当接して、撓むことにより雄型成形部材１０
と雌型成形部材２０の間隔を調節する。このために、テ
ーパ状にして、可撓性を持たせている。On the lower surface 14a of the male connecting portion 14, there is formed a ring-shaped protrusion 15 which is a polymerized absorbing structure portion. When the monomer composition of the contact lens is polymerized as will be described later, the projection 15 comes into contact with the upper surface 24a of the female mold connecting portion 24 and bends to bend the male mold member 10.
And the interval between the female molding member 20 is adjusted. For this reason, the taper shape is used to provide flexibility.
【００２４】また、雌型連結部２４の上面２４ａには突
き当て部２５が形成されており、この突き当て部２５の
上面２５ａが、雄型連結部１４の対応する下面１４ａと
当接（面接触）することにより、雄型成形部材１０と雌
型成形部材２０との距離、すなわち雄型成形面１１ａと
雌型成形面２１ａとの間隔、言い換えればコンタクトレ
ンズのレンズ厚さを決定する。An abutting portion 25 is formed on the upper surface 24a of the female connecting portion 24, and the upper surface 25a of the abutting portion 25 abuts the corresponding lower surface 14a of the male connecting portion 14 (surface). By making contact, the distance between the male molding member 10 and the female molding member 20, that is, the distance between the male molding surface 11a and the female molding surface 21a, in other words, the lens thickness of the contact lens is determined.
【００２５】図２（Ａ）に示すように、雄型成形面１１
ａの周縁部にはコンタクトレンズの周縁部内面である、
いわゆる「エッジ部」又は「ベベル部」を形成する肩部
（ショルダー部）１６が形成されている。この肩部１６
の肩曲面１６ａは、図２（Ｂ）に示すように、雄型成形
面１１ａの、凸面曲面とは逆の凹面曲面であり、さらに
雄型成形面（凸面曲面）１１ａと肩曲面（凹面曲面）１
６ａは、連続的に、すなわちなめらかに移行するように
形成されるのが望ましい。なお、モノマー組成物を重合
した際に、雄型成形部材１０及び雌型成形部材２０が接
近するのに対して、コンタクトレンズの周縁部を成形す
るのに十分な硬度が必要なため、肩部１６は実質的に非
可撓性の状態に形成される。As shown in FIG. 2A, the male molding surface 11 is formed.
The peripheral edge of a is the inner surface of the peripheral edge of the contact lens,
A shoulder portion 16 that forms a so-called “edge portion” or “bevel portion” is formed. This shoulder 16
2B, the shoulder curved surface 16a is a concave curved surface opposite to the convex curved surface of the male molding surface 11a, and the male molding surface (convex curved surface) 11a and the shoulder curved surface (concave curved surface). ) 1
6a is preferably formed so as to transition continuously, that is, smoothly. When the monomer composition is polymerized, the male molding member 10 and the female molding member 20 approach each other, whereas sufficient hardness is required to mold the peripheral portion of the contact lens. 16 is formed in a substantially inflexible state.
【００２６】そして、肩部１６の末端部が雌型成形面２
１ａと実質的に線接触することにより、雄型成形部材１
０の雄型成形面１１ａ及び肩部１６と雌型成形面２１ａ
によって、コンタクトレンズ成形空間３０が得られる。The end of the shoulder 16 is the female molding surface 2
The male mold member 1 is substantially in line contact with 1a.
0 male molding surface 11a and shoulder 16 and female molding surface 21a
Thereby, the contact lens molding space 30 is obtained.
【００２７】肩部１６の上方には垂直に垂直外壁１６ｂ
が連なっており、また、雌型成形面２１ａの外方には垂
直に垂直内壁２１ｂが連なっている。そして、垂直外壁
１６ｂとの間にはモノマー溜空間３１が形成されてい
る。A vertical outer wall 16b is vertically provided above the shoulder portion 16.
And a vertical inner wall 21b is vertically connected to the outside of the female molding surface 21a. A monomer storage space 31 is formed between the vertical outer wall 16b and the vertical outer wall 16b.
【００２８】なお、好ましくは、雄型成形部材１０の外
側壁１２の内面１２ａ、又は雌型成形部材２０の外側壁
２２の外面２２ａに、注入組み付け時のエアー抜きのた
めの溝、あるいは内面１２ａにエアー抜きのための貫通
孔を設けるとよい。また、実質的に外界と連なっている
ことはレンズ成形空間３０以外の雄型成形部材１０およ
び雌型成形部材２０によって形成される空間に存在する
空気又は酸素を追い出して、系全体即ち重合炉内を不活
性ガスに置換するのにも好都合である。It is preferable that the inner surface 12a of the outer wall 12 of the male molding member 10 or the outer surface 22a of the outer wall 22 of the female molding member 20 be provided with a groove for bleeding air during injection assembly or the inner surface 12a. It is advisable to provide a through hole for bleeding air. Further, being substantially in communication with the outside world expels air or oxygen existing in the space formed by the male molding member 10 and the female molding member 20 other than the lens molding space 30, so that the whole system, that is, the polymerization furnace It is also convenient to replace the with an inert gas.
【００２９】また、図２（Ａ）に示す突き当て部２５の
高さＡと、突起体１５の寸法、注入組み付け時における
突き当て部ギャップＢの寸法、図２（Ｂ）に示す肩部１
６と雌型成形面２１ａとの垂直方向のギャップＣとは相
互に関連がある。Further, the height A of the abutting portion 25 shown in FIG. 2A, the size of the projection 15, the size of the abutting portion gap B at the time of injection assembly, and the shoulder portion 1 shown in FIG. 2B.
6 and the vertical gap C between the female molding surface 21a are mutually related.
【００３０】高さＡはコンタクトレンズ成形空間３０か
らのモノマーの余剰分を吸収（突き当て部外方へあふれ
させずに貯留すること）できればよく、特別な制限はな
いが、０．１ｍｍ〜２ｍｍが好ましい。仮に高さＡを１
ｍｍとして、成形型材料としてポリプロピレンを使用し
た場合、突き当て部２５と雄型連結部１４の下面１４ａ
面とのギャップＢは０．０２ｍｍ程度が好ましい。ま
た、肩部１６と雌型成形面２１ａのギャップＣは、０．
０２ｍｍよりやや小さい値が好ましい。The height A is not particularly limited as long as it can absorb the excess amount of the monomer from the contact lens molding space 30 (store it without overflowing the abutting portion), but it is 0.1 mm to 2 mm. Is preferred. If height A is 1
mm, and when polypropylene is used as the molding die material, the abutting portion 25 and the lower surface 14a of the male coupling portion 14
The gap B with the surface is preferably about 0.02 mm. Further, the gap C between the shoulder portion 16 and the female molding surface 21a is 0.
A value slightly smaller than 02 mm is preferable.
【００３１】さらに、図２（Ｃ）に示すように、突き当
て部１５の寸法は、つけ根部分で断面の幅が０．３ｍｍ
位、高さが１．０２ｍｍ位が望ましい。この実施例で
は、図８及び図９で示したように可撓性のリムが直接コ
ンタクトレンズエッジ等を形成するような構成になって
いないので、重合収縮吸収を果たす突起部１５の形状等
に対する制限がない。Further, as shown in FIG. 2C, the size of the abutting portion 15 is such that the width of the cross section at the base is 0.3 mm.
It is desirable that the height and height are about 1.02 mm. In this embodiment, as shown in FIGS. 8 and 9, the flexible rim does not directly form the contact lens edge or the like. There is no limit.
【００３２】なお、雄型成形面１１ａ、雌型成形面２１
ａは例えば、金属製、セラミクス製の金型を精密ＮＣ旋
盤で加工することにより、多段階カーブ、非球面カーブ
に仕上げることもできる。The male molding surface 11a and the female molding surface 21
For example, a can be finished into a multi-step curve or an aspherical curve by processing a metal or ceramic mold with a precision NC lathe.
【００３３】また、コンタクトレンズ製造用型１の成形
型材料としては、射出成形法が適用できる熱可塑性樹脂
が望ましく、射出成形法によって高精度の成形型を容易
に量産することができる。このような、熱可塑性樹脂の
例としては、高密度ポリエチレン、ポリプロピレン、ポ
リメチルペンテン等のポリオレフィン、又はオレフィン
共重合体ポリテトラフルホルエチレン、ポリクロルトリ
フルオルエチレン等のフッ素樹脂、エチレン−ビニルア
ルコール共重合体、ポリアセタール、ポリエチレンテレ
フタレート、ポリブチレンテレフタレート等の飽和ポリ
エステル樹脂、ポリスルホン、ポリアミド等を使用でき
る。Further, as the molding material of the contact lens manufacturing mold 1, a thermoplastic resin to which an injection molding method can be applied is desirable, and a highly accurate molding die can be easily mass-produced by the injection molding method. Examples of such thermoplastic resin include high density polyethylene, polypropylene, polyolefin such as polymethylpentene, or fluororesin such as olefin copolymer polytetrafluoroethylene, polychlorotrifluoroethylene, ethylene-vinyl alcohol. Saturated polyester resins such as copolymers, polyacetal, polyethylene terephthalate, polybutylene terephthalate, polysulfone, polyamide, etc. can be used.
【００３４】次にこのコンタクトレンズ製造用型を使用
した成形の動作について図１、図２及び図３を使用して
説明する。まず、雌型成形部材２０の雌型成形面２１ａ
上にモノマーを適量滴下し、ついで雌型成形部材２０に
雄型成形部材１０を嵌合させ、組み付ける。そして、雌
型成形部材２０と雄型成形部材１０の間隔を図２に示す
位置にする。このとき、雌型成形部材２０と雄型成形部
材１０の間隔は突起体１５によって維持されている。こ
のとき、余剰なモノマーはモノマー溜空間３１にオーバ
ーフローするので、コンタクトレンズ製造用型１の外部
にこぼれ出ない。したがって、モノマー滴下量について
特別の注意を払う必要がない。Next, the molding operation using this contact lens manufacturing mold will be described with reference to FIGS. 1, 2 and 3. First, the female molding surface 21a of the female molding member 20
An appropriate amount of the monomer is dropped on the top, and then the male molding member 10 is fitted into the female molding member 20 and assembled. Then, the space between the female molding member 20 and the male molding member 10 is set to the position shown in FIG. At this time, the space between the female molding member 20 and the male molding member 10 is maintained by the protrusion 15. At this time, the excess monomer overflows into the monomer storage space 31, and therefore does not spill out of the contact lens manufacturing mold 1. Therefore, it is not necessary to pay particular attention to the amount of dropped monomer.
【００３５】なお、図２に示すように、突き当て部２５
の上面２５ａと雄型連結部１４の下面１４ａのギャップ
Ｂと、肩部１６と雌型成形面２１ａのギャップＣは維持
されている。勿論、これらのギャップは重合収縮を見込
んだものである。Incidentally, as shown in FIG.
The gap B between the upper surface 25a and the lower surface 14a of the male connecting portion 14 and the gap C between the shoulder portion 16 and the female molding surface 21a are maintained. Of course, these gaps allow for polymerization shrinkage.
【００３６】ついで、一定の昇温プログラムにより、加
熱重合を行う。このとき、モノマー溜空間３１はモノマ
ーの熱膨張分を貯留することができる。加熱重合過程に
おいて重合収縮が起こる。また、場合によっては、外部
から追加の圧力を加える場合もある。このとき、雄型成
形面１１ａ、雌型成形面２１ａを接近させる重合収縮力
が働く。これによって、突き当て部２５の上面２５ａ
が、雄型連結部１４の下面１４ａに突き当たるまで、雄
型成形面１１ａと雌型成形面２１ａの間隔が狭まる。Then, heat polymerization is carried out according to a constant temperature rising program. At this time, the monomer storage space 31 can store thermal expansion of the monomer. Polymerization shrinkage occurs in the heat polymerization process. In some cases, additional pressure may be applied from the outside. At this time, a polymerization shrinkage force that causes the male molding surface 11a and the female molding surface 21a to approach each other is exerted. Thereby, the upper surface 25a of the abutting portion 25
However, the distance between the male molding surface 11a and the female molding surface 21a narrows until it abuts the lower surface 14a of the male coupling portion 14.
【００３７】そして、図３（Ｃ）に示すように突起体１
５はその先端１５ａが変形する。このとき、突起体１５
が変形するのみで、その他の雄型成形面１１ａ、雌型成
形面２１ａ等のレンズ成形面は変化しないので、重合収
縮により、レンズ面等の変形は発生しない。Then, as shown in FIG.
5, the tip 15a is deformed. At this time, the protrusion 15
However, since the other lens molding surfaces such as the male molding surface 11a and the female molding surface 21a do not change, the lens contraction does not occur due to polymerization shrinkage.
【００３８】なお、モノマー量の調整及び重合収縮量の
予想が可能で、そのための重合収縮吸収機能を果たす突
起体１５の変形量等を充分に制御できる場合は、突き当
て部２５は必要がない。しかし、そうでない場合は、突
き当て部２５を設けることにより、肩部１６と雌型成形
面２１ａとの線接触部分に必要以上の圧力が加わらず、
線接触部分の変形を防ぐことができる。If the amount of monomer can be adjusted and the amount of polymerization shrinkage can be predicted, and the amount of deformation of the projection 15 that performs the polymerization shrinkage absorption function for that purpose can be sufficiently controlled, the abutting portion 25 is not necessary. . However, in other cases, by providing the abutting portion 25, unnecessary pressure is not applied to the line contact portion between the shoulder portion 16 and the female molding surface 21a,
It is possible to prevent deformation of the line contact portion.
【００３９】さらに、前記突き当て部２５を設けること
により雄型成形面１１ａと雌型成形面２１ａの間隔を容
易に一定に保つことができる。すなわち、コンタクトレ
ンズの厚さが一定になる。このようにして、最終的に所
望のコンタクトレンズを成形することができる。Further, by providing the abutting portion 25, it is possible to easily keep the interval between the male molding surface 11a and the female molding surface 21a constant. That is, the contact lens has a constant thickness. In this way, a desired contact lens can be finally molded.
【００４０】次に、実際的な製造例をいくつか挙げて説
明する。成形材料としてメチルメタクリレート（ＭＭ
Ａ）を主成分とする重合組成液を、１００ｍｇ滴下し、
圧力２．５ｋｇ／ｃｍ2 の加圧加熱炉で、６０°Ｃで２
時間、８０°Ｃで４時間加熱し、室温まで冷却後コンタ
クトレンズを取り出した。得られたコンタクトレンズの
表面にひけは無く、エッジ付近にもバリ、形状不良は見
られなかった。このコンタクトレンズのベースカーブ
は、７．８０±０．０１ｍｍ、中心厚は０．１５±０．
０１ｍｍ、屈折度は−３．００Ｄで解像も良好であっ
た。Next, some practical manufacturing examples will be described. Methyl methacrylate (MM) as molding material
100 mg of a polymerization composition liquid containing A) as a main component was dropped,
2 at 60 ° C in a pressure heating furnace with a pressure of 2.5 kg / cm 2.
After heating at 80 ° C. for 4 hours and cooling to room temperature, the contact lens was taken out. There was no sink mark on the surface of the obtained contact lens, and neither burr nor defective shape was observed near the edge. The base curve of this contact lens is 7.80 ± 0.01 mm, and the center thickness is 0.15 ± 0.
The resolution was good at 01 mm and the refractive index was -3.00 D.
【００４１】また、２−ヒドロキシエチルメタクリレー
ト（ＨＥＭＡ）を主成分とする重合組成液を、１００ｍ
ｇ滴下し、常圧の加熱炉で、７０°Ｃで２時間、９０°
Ｃで４時間加熱し、室温まで冷却後コンタクトレンズを
取り出した。得られたソフトコンタクトレンズに膨潤処
理をした後、外観及びパラメータを測定した結果、コン
タクトレンズの表面にひけは無く、エッジ付近にもバ
リ、たわみ、形状不良は見られなかった。このコンタク
トレンズのベースカーブは、８．４３±０．０２ｍｍ、
中心厚は０．０９±０．０１ｍｍ、屈折度は−３．００
±０．０５Ｄで解像も良好であった。A polymerization composition liquid containing 2-hydroxyethyl methacrylate (HEMA) as a main component was added to 100 m
g, and in a normal temperature heating furnace at 70 ° C for 2 hours, 90 °
After heating at C for 4 hours and cooling to room temperature, the contact lens was taken out. After swelling the obtained soft contact lens, the appearance and parameters were measured. As a result, there was no sink mark on the surface of the contact lens, and no burrs, bends, or defective shapes were observed near the edges. The base curve of this contact lens is 8.43 ± 0.02mm,
Center thickness is 0.09 ± 0.01 mm, refractive index is −3.00
The resolution was good at ± 0.05D.
【００４２】また、別にＨＥＭＡを主成分とする重合組
成液を、１００ｍｇ滴下し、炉内を不活性ガス（窒素）
に充分置換した常圧の加熱炉で、７０°Ｃで２時間、９
０°Ｃで４時間加熱し、室温まで冷却後コンタクトレン
ズを取り出した。得られたソフトコンタクトレンズに膨
潤処理をした後、外観及びパラメータを測定した結果、
コンタクトレンズの表面にひけは無く、エッジ付近にも
バリ、たわみ、形状不良は見られなかった。このコンタ
クトレンズのベースカーブは、８．４１±０．０２ｍ
ｍ、中心厚は０．０９±０．０１ｍｍ、屈折度は−３．
００±０．０５Ｄで解像も良好であった。Separately, 100 mg of a polymerization composition liquid containing HEMA as a main component was dropped, and an inert gas (nitrogen) was supplied in the furnace.
In a heating furnace at atmospheric pressure with sufficient substitution for 9 hours at 70 ° C for 9 hours.
After heating at 0 ° C for 4 hours and cooling to room temperature, the contact lens was taken out. After swelling the obtained soft contact lens, the result of measuring the appearance and parameters,
There was no sink mark on the surface of the contact lens, and no burr, bending, or defective shape was observed near the edge. The base curve of this contact lens is 8.41 ± 0.02m
m, the center thickness is 0.09 ± 0.01 mm, and the refractive index is −3.
The resolution was also good at 00 ± 0.05D.
【００４３】さらに、成形材料としてメチルメタクリレ
ート（ＭＭＡ）を主成分とする重合組成液を、１００ｍ
ｇ滴下し、２ｋｇのおもりを乗せ、常圧の加熱炉で、６
０°Ｃで２時間、８０°Ｃで４時間加熱し、室温まで冷
却後コンタクトレンズを取り出した。得られたコンタク
トレンズの表面にひけは無く、エッジ付近にもバリ、形
状不良は見られなかった。このコンタクトレンズのベー
スカーブは、７．８０±０．０１ｍｍ、中心厚は０．１
５±０．０１ｍｍ、屈折度は−３．００Ｄで解像も良好
であった。Further, 100 m of a polymerization composition liquid containing methyl methacrylate (MMA) as a main component was used as a molding material.
g, add a 2 kg weight, and use a normal-temperature heating furnace for 6
The contact lens was taken out after heating at 0 ° C for 2 hours and at 80 ° C for 4 hours and cooling to room temperature. There was no sink mark on the surface of the obtained contact lens, and neither burr nor defective shape was observed near the edge. The base curve of this contact lens is 7.80 ± 0.01 mm, and the center thickness is 0.1.
The resolution was good with 5 ± 0.01 mm and a refractive index of −3.00D.
【００４４】なお、上記の実施例では、重合収縮吸収構
造部を円環状の突起体として形成したが、円環状でなく
ても、その一部が欠落して、円周の一部に突起体が存在
するような形状にしてもよい。また、突起体１５を雄型
成形部材１０に設けたが、雌型成形部材２０側に設けて
もよいし、双方に設けてもよい。In the above embodiment, the polymerization shrinkage absorbing structure is formed as an annular projection, but even if it is not annular, a part of it is missing and the projection is formed on a part of the circumference. The shape may be such that Further, although the protrusion 15 is provided on the male molding member 10, it may be provided on the female molding member 20 side or on both sides.
【００４５】また、突き当て部２５は、雌型成形部材２
０側に設けたが、雄型成形部材１０側に設けることもで
きるし、両方に互いに突き当て部を設けることもでき
る。さらに、肩部１６を雄型成形面１１ａの周縁部に設
けたが、雌型成形面２１ａに設けることもできる。The abutting portion 25 is formed by the female molding member 2
Although it is provided on the 0 side, it may be provided on the male molding member 10 side, or both may be provided with abutting portions. Further, although the shoulder portion 16 is provided on the peripheral portion of the male molding surface 11a, it may be provided on the female molding surface 21a.
【００４６】なお、上記の実施例に基づく実際的な製造
例では、コンタクトレンズの成形材料として、ＭＭＡを
主成分とする重合組成液又はＨＥＭＡを主成分とする重
合組成液を例示しているが、本発明のコンタクトレンズ
製造用型では、コンタクトレンズ材料として公知のモノ
マーを含有する重合組成液はいかなるものも使用可能で
ある。前記のモノマーとしては例えば、トリス（トリメ
チルシロキン）シリルプロピルメタクリレート、メチル
ビス（トリメチルシロキン）シリルプロピルメタクリレ
ート、メチルビス（トリメチルシロキン）シリルプロピ
ルグリセロールメタクリレート等のシリコーン含有（メ
タ）アクリレート、例えば、２，２，２−トリフルオロ
−１−トリフルオロメチルエチルメタクリレート、２，
２，３，３−テトラフルオロプロピルメタクリレート，
２，２，２−トリフルオロエチルメタクリレート等のフ
ッ素含有（メタ）アクリレート、例えば、ＭＭＡ、メチ
ルアクリレート、エチルメタクリレート、エチルアクリ
レート、イソプロピルメタクリレート、イソプロピルア
クリレート、ｔ−ブチルメタクリレート、ｔ−ブチルア
クリレート等のアルキル（メタ）アクリレート、例え
ば、ＨＥＭＡ，２−ヒドロキシエチルアクリレート、２
−ヒドロキシメチルメタクリレート、２−ヒドロキシメ
チルアクリレート等の水酸基を１以上含むアルキル（メ
タ）アクリレート、例えば、ビニルピロリドン、Ｎ，Ｎ
−ジメチルメタクリルアミド、Ｎ，Ｎ−ジメチルアクリ
ルアミド、ビニルアルコール等の親水性モノマー等が挙
げられ、これらのモノマーを共重合又は単独重合するこ
とによりコンタクトレンズを製造する。In the practical production examples based on the above-mentioned embodiments, the polymerization composition liquid containing MMA as the main component or the polymerization composition liquid containing HEMA as the main component was exemplified as the molding material for the contact lens. In the contact lens manufacturing mold of the present invention, any polymerization composition liquid containing a monomer known as a contact lens material can be used. Examples of the monomer include silicone-containing (meth) acrylates such as tris (trimethylsilokin) silylpropyl methacrylate, methylbis (trimethylsilokin) silylpropyl methacrylate, methylbis (trimethylsilokin) silylpropyl glycerol methacrylate, and 2,2-trifluoro-1-trifluoromethylethyl methacrylate, 2,
2,3,3-tetrafluoropropyl methacrylate,
Fluorine-containing (meth) acrylates such as 2,2,2-trifluoroethyl methacrylate, for example, alkyls such as MMA, methyl acrylate, ethyl methacrylate, ethyl acrylate, isopropyl methacrylate, isopropyl acrylate, t-butyl methacrylate, t-butyl acrylate. (Meth) acrylate, for example, HEMA, 2-hydroxyethyl acrylate, 2
-Alkyl (meth) acrylates containing one or more hydroxyl groups such as hydroxymethyl methacrylate and 2-hydroxymethyl acrylate, for example, vinylpyrrolidone, N, N
Examples include hydrophilic monomers such as dimethyl methacrylamide, N, N-dimethyl acrylamide and vinyl alcohol, and contact lenses are produced by copolymerizing or homopolymerizing these monomers.
【００４７】なお、架橋剤及び重合開始剤についても、
コンタクトレンズ材料として公知のものはいかなるもの
も使用可能である。次に第２の実施例について説明す
る。図４及び図５は第２の実施例のコンタクトレンズ製
造用型の部分拡大図であり、図４（Ａ）は重合前のコン
タクトレンズ製造用型の部分拡大図であり、（Ｂ）は重
合前の重合収縮吸収構造部の詳細図であり、図５（Ａ）
は重合完了後のコンタクトレンズ製造用型の部分拡大図
であり、（Ｂ）は重合完了後の重合収縮吸収構造部の詳
細図である。Regarding the crosslinking agent and the polymerization initiator,
Any known contact lens material can be used. Next, a second embodiment will be described. 4 and 5 are partially enlarged views of the contact lens manufacturing mold of the second embodiment, FIG. 4 (A) is a partially enlarged view of the contact lens manufacturing mold before polymerization, and (B) is polymerization. FIG. 6 is a detailed view of a polymerization shrinkage absorption structure portion before, and FIG.
FIG. 4B is a partially enlarged view of the contact lens manufacturing mold after the completion of polymerization, and FIG.
【００４８】第２の実施例と第１の実施例の相違点は重
合収縮吸収構造部のみで、その他の点は第１の実施例と
同じであるので重合収縮吸収構造部についてのみ説明
し、その他の説明は省略する。The difference between the second embodiment and the first embodiment is only the polymerization shrinkage / absorption structure portion, and the other points are the same as those in the first embodiment. Therefore, only the polymerization shrinkage / absorption structure portion will be described. Other description is omitted.
【００４９】図４（Ａ）に示すように、第２の実施例で
は、重合収縮吸収構造部として、突き当て部２５の上面
２５ａに楔型の凸部２６を形成している。また、対応す
る雄型連結部１４の下面１４ａに楔型の凹部１６を形成
している。As shown in FIG. 4A, in the second embodiment, a wedge-shaped convex portion 26 is formed on the upper surface 25a of the abutting portion 25 as a polymerization shrinkage absorbing structure portion. In addition, a wedge-shaped concave portion 16 is formed on the lower surface 14a of the corresponding male connecting portion 14.
【００５０】また、図４（Ｂ）に示すように凸部２６の
高さＨは０．２５ｍｍ、幅Ｗ1 は０．２ｍｍ、凹部１６
の深さＤは０．３ｍｍ、幅Ｗ2 は０．１９ｍｍである。
なお、このときの一般的条件は、Ｗ1 ＞Ｗ2 かつＤ＞Ｈ
である。Further, as shown in FIG. 4B, the height H of the convex portion 26 is 0.25 mm, the width W 1 is 0.2 mm, and the concave portion 16 is formed.
Has a depth D of 0.3 mm and a width W 2 of 0.19 mm.
The general conditions at this time are W 1 > W 2 and D> H
Is.
【００５１】この凸部２６と凹部１６を噛み合わせて、
雄型成形面１１ａと雌型成形面２１ａの間隔を図４
（Ａ）に示すように維持する。ついで、第１の実施例と
同じように、加熱重合させると、重合収縮によって雌型
と雄型が引き寄せられ、図５（Ａ）及び（Ｂ）に示す状
態なる。すなわち、凸部２６が凹部１６に食い込み、突
き当て部２５の上面２５ａが雄型連結部１４の下面１４
ａに突き当たった位置で雄型成形部材１０と雌型成形部
材２０の位置が決まる。言い換えれば、凸部２６と凹部
１６が重合収縮吸収構造部の機能を果たしている。The convex portion 26 and the concave portion 16 are engaged with each other,
The distance between the male molding surface 11a and the female molding surface 21a is shown in FIG.
Maintain as shown in (A). Then, as in the first embodiment, when heat polymerization is performed, the female mold and the male mold are attracted by polymerization contraction, and the state shown in FIGS. 5 (A) and 5 (B) is obtained. That is, the convex portion 26 bites into the concave portion 16, and the upper surface 25 a of the butting portion 25 is the lower surface 14 of the male connecting portion 14.
The positions of the male molding member 10 and the female molding member 20 are determined at the position where they abut a. In other words, the convex portion 26 and the concave portion 16 function as a polymerization shrinkage absorbing structure portion.
【００５２】なお第２の実施例では、雌型成形部材２０
側を凸部とし、雄型成形部材１０側を凹部としたが、逆
の構成にすることもできる。さらに、凸部２６を突き当
て部の上面に設けたが、突き当て部以外に設けることも
できる。In the second embodiment, the female mold member 20 is used.
Although the side is the convex portion and the male molding member 10 side is the concave portion, the configuration may be reversed. Further, although the convex portion 26 is provided on the upper surface of the butting portion, it may be provided at a place other than the butting portion.
【００５３】次に第３の実施例について説明する。図６
及び図７は第３の実施例のコンタクトレンズ製造用型の
部分拡大図であり、図６は重合前のコンタクトレンズ製
造用型の部分拡大図であり、図７は重合完了後のコンタ
クトレンズ製造用型の部分拡大図である。Next, a third embodiment will be described. Figure 6
7 is a partially enlarged view of the contact lens manufacturing mold of the third embodiment, FIG. 6 is a partially enlarged view of the contact lens manufacturing mold before polymerization, and FIG. 7 is a contact lens manufacturing after polymerization is completed. It is a partially enlarged view of a mold.
【００５４】第３の実施例と第１の実施例の相違点は重
合収縮吸収構造部のみで、その他の点は第１の実施例と
同じであるので重合収縮吸収構造部についてのみ説明
し、その他の説明は省略する。The difference between the third embodiment and the first embodiment is only the polymerization shrinkage / absorption structure portion, and the other points are the same as those in the first embodiment. Therefore, only the polymerization shrinkage / absorption structure portion will be described. Other description is omitted.
【００５５】図６に示すように、第３の実施例では、重
合収縮吸収構造部として、雌型成形部材２０の雌型連結
部２４の一部に薄肉部２７を設けている。すなわち、第
１の実施例と同じように、加熱重合させると、重合収縮
によって雌型と雄型が引き寄せられ、図７に示す状態に
なる。すなわち、薄肉部２７が変形し、雄型成形面１１
ａと雌型成形面２１ａの間隔が狭まり、それを薄肉部２
７が吸収している。As shown in FIG. 6, in the third embodiment, a thin-walled portion 27 is provided in a part of the female die connecting portion 24 of the female die molding member 20 as the polymerization shrinkage absorbing structure portion. That is, as in the first embodiment, when heat polymerization is performed, the female mold and the male mold are attracted by polymerization shrinkage, and the state shown in FIG. 7 is obtained. That is, the thin portion 27 is deformed and the male molding surface 11 is deformed.
a and the female molding surface 21a are narrowed, the thin portion 2
7 is absorbing.
【００５６】なお、このような薄肉部を雄型連結部１４
に設けてもよいし、さらに、両方に設ける構造とするこ
ともできる。なお、上記示した数値、あるいは使用した
材質は単なる例であり、本発明はこれらの数値、材質に
制限されるものではなく、その本質をそこなわない範囲
で他の数値、材質に適用できることはいうまでもない。It should be noted that such a thin portion is used as the male connecting portion 14
It may be provided on both sides, or may be provided on both sides. The numerical values shown above, or the materials used are merely examples, and the present invention is not limited to these numerical values and materials, and can be applied to other numerical values and materials without departing from the essence thereof. Needless to say.
【００５７】[0057]
【発明の効果】以上説明したように、本発明ではレンズ
成形面外に重合収縮を補正するための重合収縮吸収構造
部を設けたので、レンズ成形面に変形等の影響を与える
ことなく重合収縮によるひけを確実に防止できるととも
に、得ようとするベースカーブ、屈折度を有する所望の
コンタクトレンズをばらつきなく製造することができ
る。As described above, in the present invention, the polymerization shrinkage absorbing structure for correcting the polymerization shrinkage is provided outside the lens molding surface, so that the polymerization shrinkage can be performed without affecting the lens molding surface such as deformation. As a result, it is possible to reliably prevent sink marks and to manufacture a desired contact lens having a desired base curve and refractive index without variation.
【００５８】また、雄型成形部材あるいは雌型成形部材
のいずれかのコンタクトレンズ成形面周縁部に、コンタ
クトレンズの周縁部を形成する非可撓性の肩部を設けた
ので、この肩部でエッジが形成されるので、正確なコン
タクトレンズのエッジが成形できる。Further, since the non-flexible shoulder portion forming the peripheral portion of the contact lens is provided at the peripheral portion of the contact lens molding surface of either the male molding member or the female molding member, this shoulder portion is used. Since the edge is formed, an accurate contact lens edge can be formed.
【００５９】さらに、雄型成形面と雌型成形面の間隔を
規定する突き当て構造部を設けたので、レンズ成形面等
に影響を与えることなく、正確にコンタクトレンズの厚
さが決定でき、品質が安定する。Further, since the abutting structure for defining the distance between the male molding surface and the female molding surface is provided, the thickness of the contact lens can be accurately determined without affecting the lens molding surface and the like. Quality is stable.
【図１】本発明の第１実施例のコンタクトレンズ製造用
型の垂直断面図である。FIG. 1 is a vertical sectional view of a mold for manufacturing a contact lens according to a first embodiment of the present invention.
【図２】重合前の図１の部分拡大図であり、（Ａ）は部
分拡大図、（Ｂ）は肩部近傍の詳細図、（Ｃ）は突起体
の詳細図である。2 is a partially enlarged view of FIG. 1 before superposition, (A) is a partially enlarged view, (B) is a detailed view of the vicinity of a shoulder, and (C) is a detailed view of a protrusion.
【図３】重合完了後の図１の部分拡大図であり、（Ａ）
は部分拡大図、（Ｂ）は肩部近傍の詳細図、（Ｃ）は突
起体の詳細図である。FIG. 3 is a partially enlarged view of FIG. 1 after completion of polymerization, (A)
Is a partially enlarged view, (B) is a detailed view of the vicinity of the shoulder, and (C) is a detailed view of the protrusion.
【図４】第２の実施例の重合前のコンタクトレンズ製造
用型の部分拡大図であり、（Ａ）は部分拡大図であり、
（Ｂ）は重合収縮吸収構造部の詳細図である。FIG. 4 is a partially enlarged view of a contact lens manufacturing mold before polymerization according to the second embodiment, (A) is a partially enlarged view,
(B) is a detailed view of the polymerization shrinkage absorption structure portion.
【図５】第２の実施例の重合完了後のコンタクトレンズ
製造用型の部分拡大図であり、（Ａ）は部分拡大図であ
り、（Ｂ）は重合収縮吸収構造部の詳細図である。5A and 5B are partially enlarged views of a mold for manufacturing a contact lens after completion of polymerization of the second embodiment, FIG. 5A is a partially enlarged view, and FIG. 5B is a detailed view of a polymerization shrinkage absorption structure portion. .
【図６】第３の実施例の重合前のコンタクトレンズ製造
用型の部分拡大図である。FIG. 6 is a partial enlarged view of a contact lens manufacturing mold before polymerization according to a third embodiment.
【図７】第３の実施例の重合完了後のコンタクトレンズ
製造用型の部分拡大図である。FIG. 7 is a partially enlarged view of a contact lens manufacturing mold after completion of polymerization in the third embodiment.
【図８】従来のコンタクトレンズ製造用型の概要を示す
図である。FIG. 8 is a diagram showing an outline of a conventional contact lens manufacturing mold.
【図９】図８のリム近傍の詳細図である。9 is a detailed view of the vicinity of the rim of FIG.
【図１０】従来の他のコンタクトレンズ製造用型の概要
を示す図である。FIG. 10 is a diagram showing an outline of another conventional mold for manufacturing contact lenses.
【符号の説明】 １ コンタクトレンズ製造用型 １０ 雄型成形部材 １１ａ 雄型成形面 １５ 突起体（重合収縮吸収構造部） ２０ 雌型成形部材 ２１ａ 雌型成形面 ２５ 突き当て部[Description of Reference Signs] 1 contact lens manufacturing mold 10 male molding member 11a male molding surface 15 protrusion (polymerization shrinkage absorbing structure portion) 20 female molding member 21a female molding surface 25 abutting portion
Claims (10)
成形部材と、凸面を形成する雌型成形部材とを有し、前
記雄型成形部材と前記雌型成形部材を嵌合させ、前記凹
面と前記凸面によってコンタクトレンズ成形空間を形成
するコンタクトレンズ製造用型において、 前記コンタクトレンズ成形空間より外側で、かつ嵌合面
より内側の領域に、前記雄型成形部材、前記雌型成形部
材の一方あるいは双方に、前記雄型成形部材及び前記雌
型成形部材の重合開始時の間隔を規定し、重合の進行に
従って変形することにより重合収縮を吸収する重合収縮
吸収構造部を設けたことを特徴とするコンタクトレンズ
製造用型。1. A male molding member that forms a concave surface of a contact lens and a female molding member that forms a convex surface, wherein the male molding member and the female molding member are fitted to each other, and the concave surface is formed. In a contact lens manufacturing die for forming a contact lens molding space by the convex surface, one of the male molding member and the female molding member in an area outside the contact lens molding space and inside the fitting surface, or Both of them are characterized by being provided with a polymerization shrinkage absorbing structure portion that defines a gap at the initiation of polymerization of the male molding member and the female molding member and absorbs polymerization shrinkage by deforming as the polymerization progresses. Mold for manufacturing contact lenses.
部材のいずれかのコンタクトレンズ成形面周縁部に、前
記コンタクトレンズの周縁部を形成する非可撓性の肩部
を設けたことを特徴とする請求項１記載のコンタクトレ
ンズ製造用型。2. A non-flexible shoulder portion forming a peripheral portion of the contact lens is provided on a peripheral portion of a contact lens molding surface of either the male molding member or the female molding member. The mold for manufacturing a contact lens according to claim 1.
対称な円環状の突起体であって、前記型軸に沿った断面
形状がテーパ状で、可撓性を有することを特徴とする請
求項１記載のコンタクトレンズ製造用型。3. The polymerized shrinkage absorbing structure is a ring-shaped projection that is symmetrical with respect to the mold axis, and has a tapered cross-sectional shape along the mold axis and is flexible. The mold for manufacturing a contact lens according to claim 1.
部材及び前記雌型成形部材の一方に凹部を設け、他方に
凸部を設けて、前記凹部へ前記凸部を食い込ませて滑り
係合する構成としたことを特徴とする請求項１記載のコ
ンタクトレンズ製造用型。4. The sliding shrinkage absorbing structure is provided with a concave portion on one of the male molding member and the female molding member, and a convex portion on the other, so that the convex portion bites into the concave portion. The mold for manufacturing a contact lens according to claim 1, wherein the mold is adapted to fit together.
を特徴とする請求項４記載のコンタクトレンズ製造用
型。5. The contact lens manufacturing die according to claim 4, wherein the convex portion and the concave portion are wedge-shaped.
部材あるいは前記雌型成形部材の一部に薄肉部を設けて
構成したことを特徴とする請求項１記載のコンタクトレ
ンズ製造用型。6. The mold for manufacturing a contact lens according to claim 1, wherein the polymerization shrinkage absorbing structure is formed by providing a thin portion on a part of the male molding member or the female molding member.
で、かつ前記嵌合面より内側の領域に、前記雄型成形部
材、前記雌型成形部材の一方あるいは双方に前記コンタ
クトレンズの厚さを規定するための突き当て構造部を設
けたことを特徴とする請求項１又は２記載のコンタクト
レンズ製造用型。7. The thickness of the contact lens is defined in one or both of the male molding member and the female molding member in a region outside the contact lens molding space and inside the fitting surface. The contact lens manufacturing die according to claim 1 or 2, further comprising an abutting structure portion for holding.
対称な円筒状であることを特徴とする請求項７記載のコ
ンタクトレンズ製造用型。8. The contact lens manufacturing mold according to claim 7, wherein the butting structure has a cylindrical shape symmetrical with respect to the mold axis.
形部材及び前記雌型成形部材の一方に凹部を設け、他方
に凸部を設けて、前記凹部へ前記凸部を食い込ませて滑
り係合する構成とした前記重合収縮吸収構造部を設けた
ことを特徴とする請求項７記載のコンタクトレンズ製造
用型。9. A recess is provided on one of the male molding member and the female molding member, and a projection is provided on the other on the surface of the abutting structure portion, and the projection is bited into the recess. The mold for manufacturing a contact lens according to claim 7, wherein the polymerization shrinkage absorbing structure portion configured to be slidably engaged is provided.
とを特徴とする請求項９記載のコンタクトレンズ製造用
型。10. The mold for manufacturing a contact lens according to claim 9, wherein the convex portion and the concave portion are wedge-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4259647A JPH06106552A (en) | 1992-09-29 | 1992-09-29 | Manufacturing mold of contact lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4259647A JPH06106552A (en) | 1992-09-29 | 1992-09-29 | Manufacturing mold of contact lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06106552A true JPH06106552A (en) | 1994-04-19 |
Family
ID=17336959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4259647A Pending JPH06106552A (en) | 1992-09-29 | 1992-09-29 | Manufacturing mold of contact lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06106552A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998033850A1 (en) * | 1997-01-30 | 1998-08-06 | Tosoh Corporation | Thermoplastic elastomer composition, thermoplastic elastomer composition powder, and skin material prepared therefrom |
| JP2011104811A (en) * | 2009-11-13 | 2011-06-02 | Fujifilm Corp | Master die, method of preparing master and the master |
| JP5148794B2 (en) * | 1999-12-16 | 2013-02-20 | クーパーヴィジョン インターナショナル ホウルディング カンパニー リミテッド パートナーシップ | Soft contact lens that can be worn for a long time |
| JP2013539544A (en) * | 2010-07-09 | 2013-10-24 | クーパーヴィジョン インターナショナル ホウルディング カンパニー リミテッド パートナーシップ | Polar thermoplastic ophthalmic lens mold, ophthalmic lens molded therein, and related methods |
| JP2014151649A (en) * | 2013-02-08 | 2014-08-25 | Johnson & Johnson Vision Care Inc | Casting cup assembly for forming ophthalmic device |
-
1992
- 1992-09-29 JP JP4259647A patent/JPH06106552A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998033850A1 (en) * | 1997-01-30 | 1998-08-06 | Tosoh Corporation | Thermoplastic elastomer composition, thermoplastic elastomer composition powder, and skin material prepared therefrom |
| JP5148794B2 (en) * | 1999-12-16 | 2013-02-20 | クーパーヴィジョン インターナショナル ホウルディング カンパニー リミテッド パートナーシップ | Soft contact lens that can be worn for a long time |
| US8637621B2 (en) | 1999-12-16 | 2014-01-28 | Coopervision International Holding Company, Lp | Long-wearable soft contact lens |
| JP2011104811A (en) * | 2009-11-13 | 2011-06-02 | Fujifilm Corp | Master die, method of preparing master and the master |
| JP2013539544A (en) * | 2010-07-09 | 2013-10-24 | クーパーヴィジョン インターナショナル ホウルディング カンパニー リミテッド パートナーシップ | Polar thermoplastic ophthalmic lens mold, ophthalmic lens molded therein, and related methods |
| US9498924B2 (en) | 2010-07-09 | 2016-11-22 | Coopervision International Holding Company, Lp | Ophthalmic lens molds with low levels of UV light transmittance, ophthalmic lenses molded therein, and related methods |
| JP2014151649A (en) * | 2013-02-08 | 2014-08-25 | Johnson & Johnson Vision Care Inc | Casting cup assembly for forming ophthalmic device |
| US9884435B2 (en) | 2013-02-08 | 2018-02-06 | Johnson & Johnson Vision Care, Inc. | Casting cup assembly for forming an ophthalmic device |
| US10350793B2 (en) | 2013-02-08 | 2019-07-16 | Johnson & Johnson Vision Care, Inc. | Casting cup assembly for forming an ophthalmic device |
| US10449697B2 (en) | 2013-02-08 | 2019-10-22 | Johnson & Johnson Vision Care, Inc. | Casting cup assembly for forming an ophthalmic device |
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