JPH0123782Y2 - - Google Patents
Info
- Publication number
- JPH0123782Y2 JPH0123782Y2 JP343181U JP343181U JPH0123782Y2 JP H0123782 Y2 JPH0123782 Y2 JP H0123782Y2 JP 343181 U JP343181 U JP 343181U JP 343181 U JP343181 U JP 343181U JP H0123782 Y2 JPH0123782 Y2 JP H0123782Y2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- lens
- width
- boundary line
- near vision
- 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.)
- Expired
Links
- 208000001491 myopia Diseases 0.000 claims description 13
- 238000006116 polymerization reaction Methods 0.000 claims description 9
- 230000006378 damage Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Eyeglasses (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
本考案は、スリワケ型２重焦点レンズ注型用モ
ールドに関する。[Detailed Description of the Invention] The present invention relates to a mold for casting a slotted bifocal lens.
２重焦点レンズの１種であるスリワケ型２重焦
点のプラスチツクレンズ（以後単にExレンズと
云う。）の注型重合は、上型用モールド、下型用
球面モールド、及び樹脂製ガスケツトを組み合わ
せたモールド中にモノマーを注入し、重合硬化さ
せて行われる。しかしながら、従来のExレンズ
は遠用部と近用部の境目の段差が大きい為、段差
部の収縮差によつて重合中にレンズが破壊するこ
とが多かつた。 Cast polymerization of a suriwake-type bifocal plastic lens (hereinafter simply referred to as an Ex lens), which is a type of bifocal lens, involves a combination of an upper mold, a lower spherical mold, and a resin gasket. Monomer is injected into a mold and polymerized and cured. However, since conventional Ex lenses have a large step between the distance and near vision sections, the lens often breaks during polymerization due to the difference in shrinkage at the step.
本考案の目的は、重合中の破壊を生ずることな
く容易にExレンズを製造し得る注型重合用モー
ルド（以後Exモールドと云う）を提供すること
である。 The purpose of the present invention is to provide a mold for cast polymerization (hereinafter referred to as Ex mold) that can easily produce Ex lenses without causing destruction during polymerization.
このような目的を達成し得る本考案のExモー
ルドは、下記ａ〜ｅの要件からなるスリワケ面用
型モールドを用いることを特徴とするものであ
る。 The Ex mold of the present invention that can achieve such objects is characterized by using a mold for slitting surfaces that meets the following requirements a to e.
ａ 段差部の抜け角が1゜〜20゜である。a The clearance angle of the stepped portion is 1° to 20°.
ｂ 段差部と近用面との境界の両端は幅1.0〜20
mmの面取り加工を施してある。b The width of both ends of the boundary between the step and the near vision surface is 1.0 to 20
It has been chamfered to mm.
ｃ 段差部と近用面との境界線には、幅0.01〜１
mmの面取り加工を施してある。c The boundary line between the stepped part and the near vision surface has a width of 0.01 to 1
It has been chamfered to mm.
ｄ 段差部と遠用面との境界線には、幅0.01〜１
mmの面取り加工を施してある。d The boundary line between the stepped part and the distance plane has a width of 0.01 to 1
It has been chamfered to mm.
ｅ モールドの周辺には0.1〜５mmの幅のフラン
ジを付けてある。e A flange with a width of 0.1 to 5 mm is attached around the mold.
以下に本考案を図面の実施例を用いて詳細に説
明する。 The present invention will be explained in detail below using embodiments of the drawings.
第１図は、本考案のExモールドのスリワケ面
形成用型（以後単にExモールドという）の１例
の型面を上にした斜視図である。 FIG. 1 is a perspective view of an example of the grooved surface forming mold of the Ex mold of the present invention (hereinafter simply referred to as the Ex mold), with the mold surface facing upward.
第２図は、第１図のExモールドを段差部に垂
直な直径方向で切断したときの断面図である。 FIG. 2 is a cross-sectional view of the Ex mold shown in FIG. 1 taken in the diametrical direction perpendicular to the stepped portion.
第３図は、第２図のＡ部の拡大図である。 FIG. 3 is an enlarged view of section A in FIG. 2.
第４図は、Exモールドの段差部の一端を示し
た斜視図である。 FIG. 4 is a perspective view showing one end of the stepped portion of the Ex mold.
本考案において、Exモールドの遠用面とは、
Exレンズの遠用面を写す面で、図面では１で示
される。近用面とはExレンズの近用面を写す面
で、図面では２で示される。段差部とは遠用面と
近用面の境界面を云い、３で示される。段差部の
抜け角とは、遠用面光軸と段差部の面とのなす角
度を云い、第３図の角度θで示される。第３図で
遠用面光軸はAxで示される。尚、段差部と近用
面との境界線は４で示され、その両端は５で示さ
れ、段差部と遠用面との境界線は６、モールドの
周辺は７で示されている。 In this invention, the distance side of the Ex mold is
This is the surface that captures the distance vision surface of the Ex lens, and is indicated by 1 in the drawing. The near vision surface is the surface of the Ex lens that captures the near vision surface, and is indicated by 2 in the drawing. The stepped portion refers to the boundary surface between the distance viewing surface and the near viewing surface, and is indicated by 3. The clearance angle of the stepped portion refers to the angle formed between the optical axis of the far viewing surface and the surface of the stepped portion, and is indicated by angle θ in FIG. 3. In FIG. 3, the distance plane optical axis is indicated by Ax. The boundary line between the stepped portion and the near vision surface is indicated by 4, its both ends are indicated by 5, the boundary line between the stepped portion and the far vision surface is indicated by 6, and the periphery of the mold is indicated by 7.
次に要件ａ〜ｅについて説明する。 Next, requirements a to e will be explained.
ａ 抜け角θは1゜〜20゜の範囲になければならな
い。抜け角θが1゜未満では、重合時のレンズの
段差部の破壊に対して防止効果はなく、20゜を
越える場合には、レンズの段差部の破壊に対し
て防止効果はあるが、著しくExレンズとして
の外観を損う為好ましくない。a The clearance angle θ must be within the range of 1° to 20°. If the exit angle θ is less than 1°, there is no effect of preventing the breakage of the step part of the lens during polymerization, and if it exceeds 20°, there is an effect of preventing the breakage of the step part of the lens, but it is significantly This is not desirable because it spoils the appearance of an Ex lens.
ｂ モールド近用面と段差部との境界線の両端に
面取り加工を施こさない場合には、重合時にそ
のような両端部へ収縮応力が集中し、レンズの
破壊をまねく結果となる。これを防止する為に
面取り加工を施すものであるが、その面取りの
幅は1.0mm〜20mmの範囲でなければならない。
1.0mm未満では、上記レンズ破壊に対して効果
はなく、20mmを越える場合はかかるレンズ破壊
に対して効果はあるが、著しくExレンズの外
観を損う為好ましくない。ここで面取り幅と
は、面取り加工された斜面の幅である。尚、特
に好ましくは、Ｒ加工による面取りが用いられ
る。b. If both ends of the boundary line between the mold near surface and the stepped portion are not chamfered, shrinkage stress will be concentrated on such both ends during polymerization, resulting in destruction of the lens. To prevent this, chamfering is applied, but the width of the chamfer must be in the range of 1.0 mm to 20 mm.
If it is less than 1.0 mm, there is no effect on the above-mentioned lens destruction, and if it exceeds 20 mm, it is effective against such lens destruction, but it is not preferable because it significantly impairs the appearance of the Ex lens. Here, the chamfer width is the width of the chamfered slope. Note that chamfering by R processing is particularly preferably used.
ｃ レンズの近用面と段差部との境界線に垂直方
向に生じるクラツクを防止する為に、Exモー
ルドの近用面と段差部との境界線４に、面取り
加工を施すものであるが、かかる面取りの幅は
0.01〜１mmの範囲でなくてはならない。0.01mm
未満では、上記クラツク防止の効果はなく、１
mmを越える場合には、クラツク防止に効果はあ
るが、著しく、Exレンズの外観を損う為好ま
しくない。c In order to prevent cracks that occur in a direction perpendicular to the boundary line between the near vision surface and the step part of the lens, a chamfering process is applied to the boundary line 4 between the near vision surface and the step part of the Ex mold. The width of this chamfer is
Must be in the range of 0.01 to 1 mm. 0.01mm
If it is less than 1, there will be no crack prevention effect as described above.
If it exceeds mm, it is effective in preventing cracks, but it is not preferable because it significantly impairs the appearance of the Ex lens.
ｄ Exモールドの遠用面と段差部との境界線６
に面取り加工を施す事により、ExレンズとEx
モールドを剥離させる際のレンズの遠用面と段
差部との境界線６上のレンズの欠けを防止する
ものである。かかる面取りの幅は、0.01〜１mm
の範囲でなければならない。0.01mm未満では上
記欠けの防止に効果はなく、１mmを越える場合
では、欠け防止に効果はあるが、著しくExレ
ンズの外観を損う為好ましくない。d Boundary line 6 between the distance surface of the Ex mold and the step part
By applying chamfering to the Ex lens and Ex
This prevents the lens from chipping on the boundary line 6 between the distance vision surface of the lens and the stepped portion when the mold is peeled off. The width of this chamfer is 0.01 to 1 mm.
must be within the range. If it is less than 0.01 mm, it will not be effective in preventing the above-mentioned chipping, and if it exceeds 1 mm, it will be effective in preventing chipping, but it is not preferable because it will significantly impair the appearance of the Ex lens.
ｅ Exモールドの周辺（凹面上）のフランジ７
は、レンズの周辺に生じるクラツクに対して効
果的なものである。フランジ幅は0.1〜５mmの
範囲でなくてはならない。0.1mm未満の場合に
は、レンズの周辺に生じるクラツクに対して効
果はなく、５mmを越える場合には、クラツクに
対して効果はあるが、著しくExレンズの外観
を損う為好ましくない。e Flange 7 around the Ex mold (on the concave surface)
is effective against cracks that occur around the lens. Flange width must be in the range 0.1-5mm. If it is less than 0.1 mm, it is not effective against cracks that occur around the lens, and if it exceeds 5 mm, it is effective against cracks, but it is not preferable because it significantly impairs the appearance of the Ex lens.
かくの如き本考案にかかる形状のExモールド
を用いて注型重合を行なうと、従来問題となつて
いた重合時のレンズ破壊が著しく減少し、末端欠
けやクラツクの無い良好な外観を有するExレン
ズを得ることができる。 When cast polymerization is carried out using the Ex mold having the shape according to the present invention, lens breakage during polymerization, which has been a problem in the past, is significantly reduced, and an Ex lens with a good appearance without end chips or cracks can be produced. can be obtained.
第１図は本考案のExモールドのスリワケ面形
成用型の１例の注型面を上にした斜視図である。
第２図は第１図のExモールドを段差部に垂直な
直径方向で切断したときの断面図である。第３図
は第２図のＡ部の拡大図である。第４図はExモ
ールドの段差部の一端を示した斜視図である。
１……遠用面、２……近用面、３……段差部、
４……段差部と近用面との境界線、５……段差部
と近用面との境界線の両端部、６……段差部と遠
用面との境界線、７……モールド周辺、Ax……
遠用面光軸、θ……抜け角。
FIG. 1 is a perspective view of an example of a mold for forming a slit surface of the Ex mold of the present invention, with the casting surface facing upward.
FIG. 2 is a cross-sectional view of the Ex mold shown in FIG. 1 taken in the diametrical direction perpendicular to the stepped portion. FIG. 3 is an enlarged view of section A in FIG. 2. FIG. 4 is a perspective view showing one end of the stepped portion of the Ex mold. 1... Distance surface, 2... Near vision surface, 3... Step part,
4... Boundary line between the step part and the near vision surface, 5... Both ends of the boundary line between the step part and the near vision surface, 6... Boundary line between the step part and the distance vision surface, 7... Around the mold , Ax...
Distance plane optical axis, θ... exit angle.
Claims (1)
重合用モールドにおいて、スリワケ面形成用型モ
ールドが下記ａ〜ｅからなることを特徴とするモ
ールド。 ａ 段差部の抜け角が1゜〜20゜である。 ｂ 段差部と近用面との境界の両端は幅1.0〜20
mmの面取り加工を施してある。 ｃ 段差部と近用面との境界線には、幅0.01〜１
mmの面取り加工を施してある。 ｄ 段差部と遠用面との境界線には、幅0.01〜１
mmの面取り加工を施してある。 ｅ モールドの周辺には0.1〜５mmの幅のフラン
ジを付けてある。[Claims for Utility Model Registration] A cast polymerization mold for a slotted bifocal plastic lens, characterized in that the mold for forming slotted surfaces comprises the following a to e. a The clearance angle of the stepped portion is 1° to 20°. b The width of both ends of the boundary between the step and the near vision surface is 1.0 to 20
It has been chamfered to mm. c The boundary line between the stepped part and the near vision surface has a width of 0.01 to 1
It has been chamfered to mm. d The boundary line between the stepped part and the distance plane has a width of 0.01 to 1
It has been chamfered to mm. e A flange with a width of 0.1 to 5 mm is attached around the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP343181U JPH0123782Y2 (en) | 1981-01-13 | 1981-01-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP343181U JPH0123782Y2 (en) | 1981-01-13 | 1981-01-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57116419U JPS57116419U (en) | 1982-07-19 |
| JPH0123782Y2 true JPH0123782Y2 (en) | 1989-07-20 |
Family
ID=29801860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP343181U Expired JPH0123782Y2 (en) | 1981-01-13 | 1981-01-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0123782Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3341095A4 (en) * | 2015-08-26 | 2019-07-17 | Goebel Quintana, Alejandro, A. | Corrective lens apparatus and method |
-
1981
- 1981-01-13 JP JP343181U patent/JPH0123782Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57116419U (en) | 1982-07-19 |
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