JPH01210334A - Method for molding lens - Google Patents
Method for molding lensInfo
- Publication number
- JPH01210334A JPH01210334A JP3661088A JP3661088A JPH01210334A JP H01210334 A JPH01210334 A JP H01210334A JP 3661088 A JP3661088 A JP 3661088A JP 3661088 A JP3661088 A JP 3661088A JP H01210334 A JPH01210334 A JP H01210334A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- molding
- holding frame
- lens holding
- vibration
- 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
- 238000000465 moulding Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 abstract description 41
- 230000002093 peripheral effect Effects 0.000 abstract description 6
- 238000010008 shearing Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/14—Pressing laminated glass articles or glass with metal inserts or enclosures, e.g. wires, bubbles, coloured parts
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はレンズ成形方法にかかり、特に、レンズとレン
ズ保持枠とを一体的に成形するレンズ成形方法に関する
。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a lens molding method, and particularly to a lens molding method in which a lens and a lens holding frame are integrally molded.
上記この種のレンズ成形方法としては、特開昭６０−１
２９２２０号公報に開示された技術や特開昭６０−１２
９２２１号公報に開示された技術が知られている。As a lens molding method of this type mentioned above, Japanese Patent Application Laid-Open No. 60-1
The technology disclosed in Publication No. 29220 and Japanese Patent Application Laid-open No. 1986-12
A technique disclosed in Japanese Patent No. 9221 is known.
特開昭６０−１２９２２１号公報に開示された技術は、
貫通孔を有するレンズ鏡胴の貫通孔内にレンズ材料を配
置し、このレンズ材料を成形可能な所定温度に加熱した
状態で前記貫通孔内に配置したパンチを関して前記レン
ズ材料を所定のレンズ形状に成形するとともに、前記レ
ンズ鏡胴と前記レンズ材料とを一体的に係止するもので
ある。The technology disclosed in Japanese Patent Application Laid-Open No. 60-129221 is
A lens material is placed in a through hole of a lens barrel having a through hole, and the lens material is heated to a predetermined temperature at which it can be molded, and then a punch placed in the through hole is used to mold the lens material into a predetermined lens. The lens barrel is molded into a shape and the lens barrel and the lens material are integrally locked together.
又、特開昭６０−１２９２２０号公報に開示された技術
は、貫通孔及び貫通孔内面に溝部を有してなるレンズ鏡
胴の貫通孔内にレンズ材料を配置し、このレンズ材料を
成形可能な所定温度に加熱した状態で前記貫通孔内に配
置したパンチを介して前記レンズ材料を所定のレンズ形
状に成形するとともに、前記レンズ材料の一部を前記溝
部にも流入させ、その後前記レンズ材料を冷却、固化さ
せることにより、レンズ鏡胴とレンズ材料とを一体的に
係止するものである。In addition, the technology disclosed in Japanese Patent Application Laid-open No. 129220/1985 places a lens material in the through hole of a lens barrel that has a through hole and a groove on the inner surface of the through hole, and it is possible to mold this lens material. While heating the lens material to a predetermined temperature, the lens material is molded into a predetermined lens shape through a punch placed in the through hole, and a portion of the lens material also flows into the groove, and then the lens material By cooling and solidifying the lens material, the lens barrel and lens material are integrally locked together.
上記従来の技術は、レンズ材料をパンチ（ポンチ）で加
圧成形するに際して、事前にレンズ材料及び成形ブロッ
ク全体を加熱し、又、加圧成形後も成形ブロック全体を
冷却して成形レンズを固化させる手段であるので、成形
工程における加熱。The above conventional technology heats the lens material and the entire molding block in advance when pressure-molding the lens material with a punch, and also cools the entire molding block after pressure-forming to solidify the molded lens. heating in the molding process.
冷却時間が極めて長くなり、レンズ成形工程におけるサ
イクルタイムが長くなるという問題点があった。又、上
記従来技術においては、成形工程におけるサイクルタイ
ムが長くなるという欠点の他に、レンズとレンズ保持枠
（鏡胴）との接着力が極めて小さいという欠点があった
。即ち、例えば特開昭６０−１２’９２２１号公報に開
示された技術においては、成形ブロック全体を加熱する
といってもレンズと接着される鏡胴側は軟化、溶融状態
にまでは加熱されないので、レンズとレンズ保持枠との
接着力は軟化したレンズ材料の冷却固化時の固化作用に
のみ依存され、従って、レンズとレンズ保持枠との間の
一体的な接着は望めず、接着力が極めて小さくなってい
たのである。There was a problem in that the cooling time was extremely long and the cycle time in the lens molding process was long. Further, in addition to the drawback that the cycle time in the molding process becomes long, the above-mentioned conventional technology also has the drawback that the adhesive force between the lens and the lens holding frame (lens barrel) is extremely low. That is, for example, in the technique disclosed in JP-A-60-12'9221, even though the entire molded block is heated, the lens barrel side that is bonded to the lens is not heated to a softened or molten state. The adhesive force between the lens and the lens holding frame depends only on the solidification effect of the softened lens material when it cools and solidifies. Therefore, it is impossible to expect an integral adhesion between the lens and the lens holding frame, and the adhesive force is extremely small. It had become.
本発明は、上記従来技術の問題点に鑑みてなされたもの
であって、短い成形時間で、かつレンズとレンズ保持枠
とを極力な接合力で一体的に成形しうるようにしたレン
ズ成形方法を提供することを目的とする。The present invention has been made in view of the problems of the prior art described above, and is a lens molding method that allows a lens and a lens holding frame to be integrally molded in a short molding time and with maximum bonding force. The purpose is to provide
本発明は、上記目的を達成するために、レンズと当該レ
ンズの保持枠とをレンズ成形時に一体的に成形するレン
ズ成形方法において、前記レンズ成形時に、前記レンズ
保持枠におけるレンズ保持部を軟化させてレンズと当該
レンズ保持枠とを一体的に成形するものである。In order to achieve the above object, the present invention provides a lens molding method in which a lens and a holding frame for the lens are integrally molded during lens molding. The lens and the lens holding frame are integrally molded.
上記方法によれば、レンズの成形工程において、レンズ
と当該レンズの保持枠とが溶着的に一体成形され、レン
ズと当該レンズ保持枠とが強力に一体化される。According to the above method, in the lens molding process, the lens and the lens holding frame are integrally molded by welding, and the lens and the lens holding frame are strongly integrated.
以下、図面を参照しつつ本発明の実施例について詳細に
説明する。Embodiments of the present invention will be described in detail below with reference to the drawings.
（第１実施例）
第１図は、本発明に係るレンズ成形方法の１実施例を実
施するためのレンズ成形装置ｌの断面説明図である。(First Embodiment) FIG. 1 is a cross-sectional explanatory diagram of a lens molding apparatus l for carrying out one embodiment of the lens molding method according to the present invention.
図において２で示すのは、成形装置１の支持台（固定台
）で、この支持台２には、上、下の加振アクチュエータ
３．４を介して上可振フレーム５及び下苛振フレーム６
が加振自在に装備しである。In the figure, 2 indicates a support base (fixed base) for the molding device 1, and this support base 2 is connected to an upper vibrating frame 5 and a lower vibrating frame via upper and lower vibrating actuators 3.4. 6
is equipped so that it can be freely excited.
上可振フレーム５には互いに平行な摺動軸部７゜８が形
設してあり、この各摺動軸部７，８は、下可振フレーム
６側に凹設されたガイド孔部９゜１０に摺動自在に嵌挿
されている。摺動軸部７゜８とガイド孔部９，１０には
、それぞればね受は部１１．１２が形設してあり、各ば
ね受部１１゜１２間には圧縮コイルばねのごとき弾機１
３゜１４が弾装しである。摺動軸部７，８とガイド孔部
９，１０の軸線は、上、下の加振アクチュエータ３．４
番こよる振動方向と同方向に設定してあり、加振アクチ
ュエータ３．４を介して振動駆動した際には、弾機１３
．１４の作用により摺動軸部７゜８とガイド孔部９，１
０との摺動が円滑に行われるように設定しである。The upper vibrating frame 5 is formed with mutually parallel sliding shaft portions 7 and 8, and each of the sliding shaft portions 7 and 8 is connected to a guide hole 9 recessed in the lower vibrating frame 6 side. 10 in a slidable manner. Spring bearing portions 11 and 12 are formed in the sliding shaft portion 7° 8 and the guide holes 9 and 10, respectively, and an elastic force 1 such as a compression coil spring is formed between each spring bearing portion 11° 12.
3°14 is loaded. The axes of the sliding shafts 7, 8 and guide holes 9, 10 are aligned with the upper and lower vibration actuators 3.4.
It is set in the same direction as the vibration direction of the bullet, and when the vibration is driven via the vibration actuator 3.4, the bullet 13
．． 14, the sliding shaft portion 7°8 and the guide hole portions 9, 1
It is set so that sliding with 0 can be performed smoothly.
上、下の各可振フレーム５．６には１成形アクチュエー
タ１５．下成形アクチュエータ１６がそれぞれ固定装備
してあり、各アクチュエータ１５゜１６の端部には、成
形面１７ａ、１８ａを有する上ポンチ１７．下ポンチ１
８がそれぞれ取付けである。各ポンチ１７，１８は、同
一軸線上に対向配置してあり、各成形アクチュエータ１
５．１’６を介して軸線方向に移動駆動自在の構成とな
っている。上、下の加振アクチュエータ３．４及び上。Each of the upper and lower vibrating frames 5.6 has one molded actuator 15. Lower forming actuators 16 are each fixedly mounted, and at the end of each actuator 15, an upper punch 17. having forming surfaces 17a, 18a is provided. Lower punch 1
8 is the installation. The punches 17 and 18 are disposed facing each other on the same axis, and each forming actuator 1
5.1'6, it is configured to be freely movable and driven in the axial direction. Upper, lower vibration actuators 3.4 and upper.
下の成形アクチュエータ１’５．１６は、油管（油圧制
御用管’）１９，２０，２１．２２を介して油圧制御装
置２３と接続構成してあり、上、下の各ポンチ１７．１
８は、油圧制御装置２３を介して逆位相、即ち相接近、
相離反する方向に作動制御可能に構成しである。The lower forming actuator 1'5.16 is connected to the hydraulic control device 23 via oil pipes (hydraulic control pipes') 19, 20, 21.22, and each of the upper and lower punches 17.1
8 is a reverse phase via the hydraulic control device 23, that is, a phase approach;
The structure is such that the operation can be controlled in opposite directions.
上、下の各ポンチ１７．１８には、上ダイス３０、下ダ
イス３１がそれぞれ軸方向摺動自在に嵌装しである。各
上、下のダイス３’０．３１は受台３２．３３に取付け
られており、各受台３２゜３３は、油圧制御袋Ｗ２３を
介して上下方向、即ち上、下の各ポンチ１７．１８の軸
線方向に駆動制御自在に構成されている。An upper die 30 and a lower die 31 are fitted into each of the upper and lower punches 17 and 18 so as to be slidable in the axial direction. Each of the upper and lower dies 3'0.31 is attached to a pedestal 32.33, and each pedestal 32.33 is connected to the upper and lower punches 17.31 in the vertical direction via a hydraulic control bag W23. The drive is freely controllable in the axial direction of 18.
上ダイス３０と下ダイス３１における各対向面側の端部
には、レンズ成形時にレンズ３４ａ（第２図す参照）と
一体的に係止成形されるレンズ保持枠３５係合用の段部
３６，３’７がそれぞれ形設しである。レンズ保持枠３
５は熱可塑性樹脂にて構成されるとともに、レンズ保持
枠３５の外周面部には第２図ａにて示すごとく上、下各
ダイス３０．３．１の段部３６，３７と係合するフラン
ジ部３５ａが形設してあり、成形時には、このフランジ
部３５ａが各段部３６．３７と係合してレンズ保持枠３
５が上、下の各ダイス３０．３１を介して挟持固定され
るようになっている。レンズ保持枠３５の軸心部には、
レンズ材料３４（第２図ａ参照）と嵌合する孔３８が形
設してあり、成形時にはレンズ材料３４とリング状のレ
ンズ保持部３５ｂとが互いに係止接合されるようになっ
ている。At the ends of the upper die 30 and the lower die 31 on the opposing surface side, there are stepped portions 36 for engaging the lens holding frame 35, which are integrally molded with the lens 34a (see FIG. 2) during lens molding. 3'7 are each shaped. Lens holding frame 3
5 is made of thermoplastic resin, and the outer peripheral surface of the lens holding frame 35 is provided with flanges that engage with the steps 36 and 37 of the upper and lower dies 30.3.1, as shown in FIG. 2a. A portion 35a is formed, and during molding, this flange portion 35a engages with each step portion 36, 37 to close the lens holding frame 3.
5 is clamped and fixed via the upper and lower dies 30 and 31. At the axial center of the lens holding frame 35,
A hole 38 into which the lens material 34 (see FIG. 2a) fits is formed, so that the lens material 34 and the ring-shaped lens holding portion 35b are locked and joined to each other during molding.
次に、上記構成によりなるレンズ成形装置１を用いてレ
ンズと当該レンズ保持枠とを一体成形する方法について
説明する。Next, a method of integrally molding a lens and the lens holding frame using the lens molding apparatus 1 having the above configuration will be described.
本実施例においては、レンズ保持枠３５の材質としてＰ
Ｃを用い、レンズ保持部３５ｂの肉厚を２．０ｍｍに設
定した。又、レンズ材料（被成形体）としては、レンズ
保持枠３５のレンズ保持部３５ｂとほぼ等しい板厚２ｍ
ｍのＰＭＭＡ （熱可塑性樹脂の光学材料）を用いた。In this embodiment, the material of the lens holding frame 35 is P.
C, and the thickness of the lens holding portion 35b was set to 2.0 mm. In addition, the lens material (molded object) has a plate thickness of 2 m, which is approximately the same as the lens holding part 35b of the lens holding frame 35.
PMMA (thermoplastic resin optical material) was used.
さらに、成形工程は、第３図にて示す動作シーケンスに
従って行い、成形条件及び第３図にて示す動作シーケン
スにおける各値は第１表に示す値に設定した。Further, the molding process was performed according to the operation sequence shown in FIG. 3, and the molding conditions and each value in the operation sequence shown in FIG. 3 were set to the values shown in Table 1.
以下、上記条件にて光学素子を成形する方法について具
体的に説明する。Hereinafter, a method for molding an optical element under the above conditions will be specifically described.
まず、上下ダイス３０．３１及び上下ポンチ１７．１．
８間を所定量開いておき、この間にレンズ保持枠３５を
そのフランジ部３５ａが下ダイス３１の段部３７と係合
するように載置する。そして、レンズ保持枠３５の孔３
８にレンズ材料３４を嵌合する。First, the upper and lower dies 30.31 and the upper and lower punches 17.1.
8 is left open by a predetermined amount, and the lens holding frame 35 is placed so that the flange portion 35a thereof engages with the stepped portion 37 of the lower die 31. Then, the hole 3 of the lens holding frame 35
8, the lens material 34 is fitted.
次に、上ポンチ１７及び上ダイス３０を下動せしめてレ
ンズ材料３４及びレンズ保持枠３５を挟持固定する。こ
の場合、下ポンチ１８．下ダイス３１側を作動してもよ
く、又は上ポンチ１７．上ダイス３０及び下ポンチ１８
．下ダイス３１の双方を作動させてレンズ材料３４及び
レンズ保持枠３５を挟持固定してもよい。Next, the upper punch 17 and the upper die 30 are moved down to clamp and fix the lens material 34 and the lens holding frame 35. In this case, the lower punch 18. The lower die 31 side may be operated, or the upper punch 17. Upper die 30 and lower punch 18
．． The lens material 34 and the lens holding frame 35 may be clamped and fixed by operating both of the lower dies 31.
次に、上、下の加振アクチュエータ３．４を作動させ、
上、下の可振フレーム５，６を介して上。Next, operate the upper and lower vibration actuators 3.4,
Upper via the upper and lower vibrating frames 5 and 6.
下のポンチ１７．１８を振動させる。この振動操作の際
には、上、下の各ポンチ１７．１８の振動位相を逆位相
として振動させる。加振アクチュエータ３．４は、第３
図にて示すごとく立上り時間ｔ、（０，６秒）後に設定
された振幅となる。Vibrate the punches 17 and 18 below. During this vibration operation, the upper and lower punches 17 and 18 are vibrated with their vibration phases being opposite to each other. The vibration actuator 3.4 is a third
As shown in the figure, the set amplitude is reached after the rise time t (0.6 seconds).
この設定振幅でさらに時間ｔ２ （９秒）だけ上下のポ
ンチ１７．１８を振動させる。この振動時には、第２図
ａにて示すごとく上、下の各ポンチ１７．１８にてレン
ズ材料３４及びレンズ保持枠３５におけるレンズ保持部
３５ｂ周辺部を振動させ、振動によるせん断熱によりレ
ンズ材料３４及びレンズ保持部３５ｂを熱軟化させる。With this set amplitude, the upper and lower punches 17 and 18 are further vibrated for a time t2 (9 seconds). During this vibration, the upper and lower punches 17 and 18 vibrate the lens material 34 and the surrounding area of the lens holding part 35b in the lens holding frame 35, as shown in FIG. And the lens holding part 35b is thermally softened.
この振動熱軟化工程ｔ２にてレンズ材料３４が成形可能
状態に熱軟化されるとともに、この振動による熱軟化に
、より、レンズ材料３４の外周面部とレンズ保持部３５
ｂとが溶着的に一体接合される。In this vibration thermal softening step t2, the lens material 34 is thermally softened to a moldable state, and due to the thermal softening caused by the vibration, the outer circumferential surface of the lens material 34 and the lens holding portion 35 are
b are integrally joined by welding.
次に、加振アクチュエータ３．４を作動させたままで成
形アクチュエータ１５．１６を作動させ、上下のポンチ
１７．１８を介してレンズ材料３４を振動加圧させて熱
軟化されたレンズ材料３４に上下各ポンチ１７．１８の
成形面１７ａ、１８ａの形状を転写する。本工程は、第
３図にて示すようにレンズ成形工程であり、本工程時間
ｔ３は１秒である。Next, the molding actuator 15.16 is operated while the vibration actuator 3.4 is kept operating, and the lens material 34 is vibrated and pressurized via the upper and lower punches 17.18, so that the lens material 34 that has been thermally softened is The shapes of the molding surfaces 17a, 18a of each punch 17, 18 are transferred. This process is a lens molding process as shown in FIG. 3, and the process time t3 is 1 second.
レンズ成形工程後に時間ｔ４＝１．６秒の振動工程１時
間ｔｓ−１０秒の保圧工程を経てレンズ成形が完了する
。After the lens molding step, the lens molding is completed through a vibration step for a time t4 = 1.6 seconds and a pressure holding step for 1 hour ts - 10 seconds.
以上の各工程を経て所望形状のレンズ３４ａが成形され
るものである。特に、本実施例においては、レンズ成形
時にレンズ保持枠３５におけるレンズ保持部３５ｂも振
動により熱軟化させるので、レンズ３４ａとレンズ保持
枠３５とが溶着的に一体化され、強力に接合される。又
、レンズ材料３４の成形時には、振動による自己発熱に
よりレンズ材料３４を熱軟化させるとともに、上、下の
ポンチ１７．１８を振動させつつ成形を行うので、短い
成形サイクルでレンズ３４ａを成形することができる。Through each of the above steps, a lens 34a having a desired shape is molded. In particular, in this embodiment, since the lens holding portion 35b of the lens holding frame 35 is also thermally softened by vibration during lens molding, the lens 34a and the lens holding frame 35 are integrated by welding and are strongly joined. Further, when molding the lens material 34, the lens material 34 is thermally softened by self-heating due to vibration, and molding is performed while vibrating the upper and lower punches 17 and 18, so the lens 34a can be molded in a short molding cycle. Can be done.
又、同様に冷却時間も短くなるので、全体として成形時
間を大幅に短くすることができる。又、レンズ３４ａと
レンズ保持枠３５とを同軸状態で一定成形するので、レ
ンズ３４ａをレンズ保持枠３５に対して高い位置決め精
度で固定することができる。Furthermore, since the cooling time is similarly shortened, the overall molding time can be significantly shortened. Further, since the lens 34a and the lens holding frame 35 are coaxially formed in a fixed manner, the lens 34a can be fixed to the lens holding frame 35 with high positioning accuracy.
（第２実施例）
本実施例は、第４図にて示す成形部を用いて第３図にて
示した動作シーケンス（工程）にて成形を行うものであ
る。又、本実施例の成形条件を第２表に示す。(Second Example) In this example, molding is performed using the molding section shown in FIG. 4 in the operation sequence (step) shown in FIG. 3. Further, the molding conditions of this example are shown in Table 2.
本実施例の成形部は、第４図にて示すごとく、し・ンズ
保持枠３５係合用の段部３７を下ダイス３１側にのみ設
け、下ダイス３１の段部３７内にレンズ保持枠３５を嵌
装しうるように構成しである。又、レンズ材料３４は、
リング状のレンズ保持部３５ｂ上に載置しうるように設
定してあり、成形時には、レンズ保持枠３５の孔３８に
下ポンチ１８の頭部１８ｂが嵌入するように設定しであ
る。その他の構成は第１実施例と同様であるので、その
説明を省略する。As shown in FIG. 4, the molding part of this embodiment is provided with a stepped portion 37 for engaging the lens holding frame 35 only on the lower die 31 side, and the lens holding frame 35 is provided within the stepped portion 37 of the lower die 31. It is configured so that it can be fitted. Moreover, the lens material 34 is
It is set so that it can be placed on a ring-shaped lens holding part 35b, and the head 18b of the lower punch 18 is set to fit into the hole 38 of the lens holding frame 35 during molding. The rest of the configuration is the same as that of the first embodiment, so the explanation thereof will be omitted.
本実施例においては、下ダイス３１の段部３７内に嵌装
したレンズ枠３５のレンズ保持部３５ｂ上にレンズ材料
３４を載置して成形を行う。こので
成形工程は第１実施例と同様であるので、その説明を省
略する。In this embodiment, the lens material 34 is placed on the lens holding portion 35b of the lens frame 35 fitted into the stepped portion 37 of the lower die 31 and molded. Since the molding process is the same as that of the first embodiment, the explanation thereof will be omitted.
本実施例によれば、第１実施例と同様にレンズ３４ａと
レンズ保持枠３５とを溶着的に一体成形できる。又、第
１実施例と同様に短時間で強力にレンズ３４ａとレンズ
保持枠３５とを一体的に固定することができるとともに
、レンズ保持枠３５の内径よりも小さな外径のレンズ材
料３４を用いることにより、上、下ポンチ１７．１８に
より圧縮されたレンズ材料３４の逃げ場ができるので、
内部応力の少ないレンズ３４ａをその保持枠３５と一体
成形することができる
（第３実施例）
本実施例は、第５図にて示す成形部を用いて第３図にて
示した動作シーケンス（工程）にて成形を行うものであ
る。又、本実施例の成形条件を第３表に示す。According to this embodiment, the lens 34a and the lens holding frame 35 can be integrally molded by welding as in the first embodiment. Further, as in the first embodiment, the lens 34a and the lens holding frame 35 can be integrally fixed in a short time and strongly, and the lens material 34 having an outer diameter smaller than the inner diameter of the lens holding frame 35 is used. This creates an escape area for the lens material 34 compressed by the upper and lower punches 17 and 18.
Lens 34a with low internal stress can be integrally molded with its holding frame 35 (Third Embodiment) This embodiment uses the molding part shown in FIG. 5 to perform the operation sequence shown in FIG. The molding is carried out in the process). Further, the molding conditions of this example are shown in Table 3.
本実施例の成形部は、第５図にて示すごとく、レンズ保
持枠３５をフランジ部３５ａだけで筒状に形設し、この
筒状のレンズ保持枠３５の内周面にレンズ材料３４を嵌
入させるとともに、上下の各ポンチ１７．１８の頭部１
７ｂ、１８ｂを摺接可能に構成しである。４０．４１で
示すのは逃げ用の空隙である。その他の構成は第１実施
例と同様であるので、その説明を省略する。As shown in FIG. 5, in the molding section of this embodiment, the lens holding frame 35 is formed into a cylindrical shape with only the flange portion 35a, and the lens material 34 is coated on the inner peripheral surface of the cylindrical lens holding frame 35. Insert the head 1 of the upper and lower punches 17 and 18.
7b and 18b are configured to be slidably connected. The number 40.41 indicates an escape gap. The rest of the configuration is the same as that of the first embodiment, so the explanation thereof will be omitted.
本実施例の成形方法は、第１実施例の場合と同様である
が、本実施例においては、振動成形時にレンズ保持枠３
５におけるレンズ保持部間辺部、即ち、レンズ材料３４
と接合する内周面部付近を上下ポンチ１７．１８の振動
時の摩擦熱により軟化状態にしてレンズ３４ａとその保
持枠３５とを溶着的に一体化させるものである。The molding method of this embodiment is the same as that of the first embodiment, but in this embodiment, the lens holding frame 3 is
The side part between the lens holding parts in 5, that is, the lens material 34
The lens 34a and its holding frame 35 are welded together by softening the vicinity of the inner circumferential surface where the lens 34a and its holding frame 35 are joined by the frictional heat generated by the vibrations of the upper and lower punches 17 and 18.
本実施例によれば、第１実施例の効果に加えて、レンズ
保持枠３５の内周面に第１実施例のようなレンズ保持部
（凸出部）３５ｂがないので、上下ポンチ１７．１８の
軸方向の位置を移動させることにより、筒状レンズ保持
枠３５の内周面の任意位置にレンズ３４ａを溶着固定で
きる利点がある。According to this embodiment, in addition to the effects of the first embodiment, since the inner peripheral surface of the lens holding frame 35 does not have the lens holding portion (convex portion) 35b as in the first embodiment, the upper and lower punches 17. By moving the position of lens 18 in the axial direction, there is an advantage that the lens 34a can be welded and fixed to any position on the inner peripheral surface of the cylindrical lens holding frame 35.
以上のように本発明のレンズ成形方法によれば、レンズ
とレンズ保持枠とを短時間にて強力な接着力にて一体成
形できる。As described above, according to the lens molding method of the present invention, the lens and the lens holding frame can be integrally molded in a short time with strong adhesive force.
第１図は、本発明に係る方法の実施装置の構成説明図、
第２図ａ、ｂは、第１図の要部の説明図、第３図は、第
１実施例における動作シーケンス図、
第４図、第５図は、それぞれ本発明に係る方法の第２．
第３実施例の実施装置の要部を示す正断面図である。
１７．１８・・・上、下のポンチ
３０．３１・・・上、下のダイス
３４・・・レンズ材料
３５・・・レンズ保持枠
第１図FIG. 1 is an explanatory diagram of the configuration of an apparatus for implementing the method according to the present invention, FIGS. 2 a and b are explanatory diagrams of the main parts of FIG. 1, and FIG. 3 is an operation sequence diagram in the first embodiment. FIGS. 4 and 5 respectively show the second embodiment of the method according to the present invention.
FIG. 7 is a front cross-sectional view showing the main parts of the implementation device of the third embodiment. 17.18...Upper and lower punches 30.31...Upper and lower dies 34...Lens material 35...Lens holding frame Fig. 1
Claims (1)
に成形するレンズ成形方法において、前記レンズ成形時
に、前記レンズ保持枠におけるレンズ保持部を軟化させ
てレンズと当該レンズ保持枠とを一体的に成形すること
を特徴とするレンズ成形方法。In a lens molding method in which a lens and a holding frame for the lens are integrally molded during lens molding, the lens holding part in the lens holding frame is softened during the lens molding to integrally mold the lens and the lens holding frame. A lens molding method characterized by molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3661088A JPH01210334A (en) | 1988-02-19 | 1988-02-19 | Method for molding lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3661088A JPH01210334A (en) | 1988-02-19 | 1988-02-19 | Method for molding lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01210334A true JPH01210334A (en) | 1989-08-23 |
Family
ID=12474570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3661088A Pending JPH01210334A (en) | 1988-02-19 | 1988-02-19 | Method for molding lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01210334A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5494615A (en) * | 1994-09-28 | 1996-02-27 | Wang Lee; Min-Young | Method and apparatus for manufacturing eyeglasses by forming integrally a frame unit on a lens unit |
| US5642228A (en) * | 1993-12-21 | 1997-06-24 | Koito Manufacturing Co., Ltd. | Resin-molded lens having no sink marks and process for producing same |
-
1988
- 1988-02-19 JP JP3661088A patent/JPH01210334A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5642228A (en) * | 1993-12-21 | 1997-06-24 | Koito Manufacturing Co., Ltd. | Resin-molded lens having no sink marks and process for producing same |
| US5494615A (en) * | 1994-09-28 | 1996-02-27 | Wang Lee; Min-Young | Method and apparatus for manufacturing eyeglasses by forming integrally a frame unit on a lens unit |
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