JP2003231159A - Injection molding die for plastic optical lens and method for manufacturing plastic optical lens - Google Patents
Injection molding die for plastic optical lens and method for manufacturing plastic optical lensInfo
- Publication number
- JP2003231159A JP2003231159A JP2002367096A JP2002367096A JP2003231159A JP 2003231159 A JP2003231159 A JP 2003231159A JP 2002367096 A JP2002367096 A JP 2002367096A JP 2002367096 A JP2002367096 A JP 2002367096A JP 2003231159 A JP2003231159 A JP 2003231159A
- Authority
- JP
- Japan
- Prior art keywords
- fixed
- sesame
- moving
- molding
- optical lens
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
- B29C45/2606—Guiding or centering means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0016—Lenses
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、プラスチック光学
レンズ用射出成形金型ならびにプラスチック光学レンズ
の製造方法に関する。TECHNICAL FIELD The present invention relates to an injection mold for a plastic optical lens and a method for manufacturing the plastic optical lens.
【０００２】[0002]
【従来の技術】図４は、従来提案されたこの種射出成形
金型の断面図である。この射出成形金型１００は、固定
側金型１０１と移動側金型１０２を備え、両者は接合面
１０３で離接可能に接合される。2. Description of the Related Art FIG. 4 is a sectional view of a conventionally proposed injection molding die of this kind. The injection molding die 100 includes a stationary-side die 101 and a moving-side die 102, which are joined together at a joining surface 103 so as to be separable from each other.
【０００３】固定側金型１０１は、固定側プレート１０
４と、それを取り付ける取付板１０５からなる。固定側
プレート１０４には、固定側スリーブ１０６を介して、
レンズ成形面を有する固定側レンズ入子１０７が嵌合さ
れ、ボルト１０８で固定側プレート取付板１０５に固定
されている。また固定側プレート取付板１０５には、固
定側スリーブ１０６から離れた位置にテーパーブッシュ
１０９が固定されている。固定側プレート１０４の中央
部にスプール１１０、ランナ１１１、キャビティ１１２
と連通するゲート１１３が設けられている。The fixed-side die 101 includes a fixed-side plate 10
4 and a mounting plate 105 for mounting it. To the fixed side plate 104, via the fixed side sleeve 106,
A fixed lens insert 107 having a lens molding surface is fitted and fixed to the fixed plate mounting plate 105 with a bolt 108. A taper bush 109 is fixed to the fixed-side plate mounting plate 105 at a position apart from the fixed-side sleeve 106. A spool 110, a runner 111, and a cavity 112 are provided at the center of the fixed side plate 104.
A gate 113 that communicates with is provided.
【０００４】移動側金型１０２は、移動側プレート１１
４と、それを取り付ける取付板１１５からなる。移動側
プレート１１４には、移動側スリーブ１１６を介して、
レンズ成形面を有する移動側レンズ入子１１７が嵌合さ
れる。移動側プレート１１４の受け板１１８と取付板１
１５の間にスペーサブロック１１９が介在され、スペー
サブロック１１９の内側に突き出し板１２０，１２１が
設置されている。突出しロッド１２２の後端１２２ａが
突き出し板１２０，１２１で保持され、突出しロッド１
２２の先端１２２ｂが移動側レンズ入子１１７にネジ止
めで連結されている。The moving side mold 102 includes a moving side plate 11
4 and a mounting plate 115 for mounting it. On the moving side plate 114, via the moving side sleeve 116,
The moving side lens insert 117 having a lens molding surface is fitted. The receiving plate 118 of the moving side plate 114 and the mounting plate 1
A spacer block 119 is interposed between the spacers 15, and protruding plates 120 and 121 are installed inside the spacer block 119. The rear end 122a of the protruding rod 122 is held by the protruding plates 120 and 121, and the protruding rod 1
The front end 122b of 22 is connected to the moving side lens insert 117 by screwing.
【０００５】また突き出し板１２０，１２１はエジェク
ターピン１２３の後端１２３ａを保持し、エジェクター
ピン１２３の先端１２３ｂはランナ１１１近くまで延び
ている。The protruding plates 120 and 121 hold the rear end 123a of the ejector pin 123, and the front end 123b of the ejector pin 123 extends close to the runner 111.
【０００６】移動側プレート１１４にはテーパーガイド
１２４が設けられ、これを前記テーパーブッシュ１０９
に嵌合することで、固定側レンズ入子１０７と移動側レ
ンズ入子１１７の芯ずれを抑えようとしていた。A taper guide 124 is provided on the movable side plate 114, and the taper bush 109
It has been attempted to suppress the misalignment between the fixed side lens insert 107 and the moving side lens insert 117 by fitting them to each other.
【０００７】なお、射出成形金型に関しては、例えば下
記のような特許文献１〜４に記載されたような提案があ
る。Regarding the injection molding die, there are proposals as described in Patent Documents 1 to 4, for example.
【０００８】[0008]
【特許文献１】特開昭６０−１２９２２９号公報 （第
３図、第４図）[Patent Document 1] JP-A-60-129229 (FIGS. 3 and 4)
【０００９】[0009]
【特許文献２】特開平７−３２９１３３号公報 （図
１、図２）[Patent Document 2] Japanese Patent Laid-Open No. 7-329133 (FIGS. 1 and 2)
【００１０】[0010]
【特許文献３】特開平８−１１８４３２号公報 （図
１）[Patent Document 3] JP-A-8-118432 (FIG. 1)
【００１１】[0011]
【特許文献４】特開平９−２６７３６２号公報 （図
１）[Patent Document 4] Japanese Patent Application Laid-Open No. 9-267362 (FIG. 1)
【００１２】[0012]
【発明が解決しようとする課題】しかし、この射出成形
金型１００は、レンズ入子１０７，１１７の芯ずれを抑
えるためのテーパーブッシュ１０９とテーパーガイド１
２４がレンズ入子１０７，１１７から離れた位置にあ
り、しかもレンズ入子１０７，１１７までの間に複数の
部材が介在されて、間接的に芯合わせが行なわれる構造
になっている。However, this injection molding die 100 has a taper bush 109 and a taper guide 1 for suppressing misalignment of the lens inserts 107 and 117.
24 is located away from the lens inserts 107 and 117, and a plurality of members are interposed between the lens inserts 107 and 117 to indirectly perform centering.
【００１３】また固定側レンズ入子１０７を固定側プレ
ート１０４に装着するのに、固定側プレート１０４と固
定側スリーブ１０６の間、ならびに固定側スリーブ１０
６と固定側レンズ入子１０７の間に若干のクリアランス
がもたせてあり、しかも、固定側レンズ入子１０７を取
付板１０５にボルト１０８で固定するため、固定側レン
ズ入子１０７に偏りが生じる。To mount the fixed side lens insert 107 on the fixed side plate 104, between the fixed side plate 104 and the fixed side sleeve 106 and the fixed side sleeve 10.
There is a slight clearance between the fixed lens insert 107 and the fixed lens insert 107, and since the fixed lens insert 107 is fixed to the mounting plate 105 with the bolt 108, the fixed lens insert 107 is biased.
【００１４】これは移動側レンズ入子１１７の方も同様
で、移動側プレート１１４と移動側スリーブ１１６の
間、ならびに移動側スリーブ１１６と移動側レンズ入子
１１７の間に若干のクリアランズがもたせてあり、しか
も、移動側レンズ入子１１７は突出しロッド１２２の先
端１２２ｂによりネジ止めされているから、移動側レン
ズ入子１１７に偏りが生じる。This is the same for the moving side lens insert 117, and some clear lands are provided between the moving side plate 114 and the moving side sleeve 116, and between the moving side sleeve 116 and the moving side lens insert 117. Moreover, since the moving side lens insert 117 is projected and screwed by the tip 122b of the rod 122, the moving side lens insert 117 is biased.
【００１５】このようなことから固定側レンズ入子１０
７と移動側レンズ入子１１７の間に芯ずれを生じ、光学
レンズの場合に芯ずれは光軸のずれとして現れ、成形品
質の低下をきたすという欠点がある。From the above, the fixed side lens insert 10
7 and the moving side lens insert 117 cause a misalignment, and in the case of an optical lens, the misalignment appears as a misalignment of the optical axis, resulting in deterioration of molding quality.
【００１６】本発明の目的は、このような従来技術の問
題点を解消し、構造が簡単でかつ成形精度の高いプラス
チック光学レンズ用射出成形金型ならびにプラスチック
光学レンズの製造方法を提供することにある。An object of the present invention is to solve the problems of the prior art and to provide an injection molding die for a plastic optical lens having a simple structure and high molding accuracy, and a method for manufacturing the plastic optical lens. is there.
【００１７】[0017]
【課題を解決するための手段】上記目的を達成するため
に、本発明の第１の手段は、固定側金型と移動側金型を
有し、少なくとも前記移動側金型が、移動側成形面を有
する移動側成形ゴマと、その移動側成形ゴマを外側から
保持する例えば後述の移動側外ゴマなどの移動側保持部
材と、ボール保持筒の周壁にボールを間隔をおいて回転
可能に保持した移動側ボールリティーナを備え、その移
動側ボールリティーナを移動側成形ゴマと移動側保持部
材の間に介挿して、ボールの介在で移動側成形ゴマと移
動側保持部材の芯合わせを行ない、かつ、前記移動側保
持部材または固定側金型のいずれか一方に、周面にテー
パ面を有する嵌合凹部を設け、固定側金型または移動側
保持部材のいずれか他方に、周面にテーパ面を有し前記
嵌合凹部と嵌合する嵌合凸部を設けたことを特徴とする
ものである。In order to achieve the above object, the first means of the present invention has a fixed side mold and a moving side mold, and at least the moving side mold has a moving side molding. A moving-side molding sesame having a surface, a moving-side holding member such as a moving-side outer sesame described below for holding the moving-side molding sesame from the outside, and a ball rotatably held on the peripheral wall of the ball-holding cylinder at an interval. The moving side ball retainer is inserted between the moving side molding sesame and the moving side holding member, and the moving side molding sesame and the moving side holding member are aligned by interposing balls, and , Either the moving side holding member or the fixed side mold is provided with a fitting recess having a tapered surface on the peripheral surface, and the other side of the fixed side mold or the moving side holding member is tapered on the peripheral surface. Has a fitting recess In which it characterized in that a fitting projection.
【００１８】本発明の第２の手段は前記第１の手段にお
いて、前記固定側金型が、固定側成形面を有する固定側
成形ゴマと、その固定側成形ゴマを外側から保持する例
えば後述の固定側外ゴマなどの固定側保持部材と、ボー
ル保持筒の周壁にボールを間隔をおいて回転可能に保持
した固定側ボールリティーナを備え、前記固定側ボール
リティーナを固定側成形ゴマと固定側保持部材の間に介
挿して、ボールの介在で固定側成形ゴマと固定側保持部
材の芯合わせを行なうことを特徴とするものである。A second means of the present invention is the first means according to the first means, wherein the fixed-side mold holds a fixed-side molding sesame having a fixed-side molding surface and holds the fixed-side molding sesame from the outside, for example, as described later. A fixed-side holding member such as a fixed-side outer sesame, and a fixed-side ball retainer that rotatably holds balls on the peripheral wall of the ball-holding cylinder at an interval, and holds the fixed-side ball retainer with the fixed-side molded sesame It is characterized in that the fixed side molding sesame and the fixed side holding member are aligned with each other by interposing a ball interposed between the members.
【００１９】本発明の第３の手段は前記第１の手段また
は第２の手段の射出成形金型を用い、前記固定側金型と
移動側金型を接合して、両者間に形成されるキャビティ
内に溶融樹脂を射出、充填してプラスチック光学レンズ
を製造することを特徴とするものである。A third means of the present invention uses the injection molding die of the first means or the second means, joins the fixed side die and the moving side die, and is formed between them. It is characterized by injecting and filling molten resin into the cavity to manufacture a plastic optical lens.
【００２０】[0020]
【発明の実施の形態】次に本発明の実施形態を図ととも
に説明する。図１は第１の実施形態に係る射出成形金型
の断面図、図２はその射出成形金型のボールリティーナ
付近の拡大断面図である。BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of an injection molding die according to the first embodiment, and FIG. 2 is an enlarged cross-sectional view near the ball retainer of the injection molding die.
【００２１】まず射出成形金型の全体的な構造を図１と
とともに説明する。移動側外ゴマ（移動側入子）１の内
側に移動側レンズゴマ２が配置され、固定側外ゴマ（固
定側入子）３の内側に固定側レンズゴマ４が配置されて
いる。金型の型開閉により、固定側外ゴマ３に対して移
動側外ゴマ１が離接する。First, the overall structure of the injection molding die will be described with reference to FIG. The moving side lens sesame 2 is arranged inside the moving side outer sesame (moving side nest) 1, and the fixed side lens sesame 4 is arranged inside the fixed side outer sesame (fixed side nest) 3. When the mold is opened and closed, the movable-side outer sesame 1 is brought into contact with and separated from the fixed-side outer sesame 3.
【００２２】移動側外ゴマ１の端面に移動側レンズゴマ
２を中心として、周面がテーパ状になった嵌合凹部５が
設けられ、一方、固定側外ゴマ３の端面に固定側レンズ
ゴマ４を中心として、周面がテーパ状になった嵌合凸部
６が設けられている。嵌合凹部５のテーパ角度と嵌合凸
部６のテーパ角度はほぼ一致しており、同図に示すよう
に型閉め時に嵌合凸部６が嵌合凹部５に挿入され、挿入
完了時に嵌合凸部６の周面が嵌合凹部５の周面に一様に
密着する。A fitting recess 5 having a tapered peripheral surface around the moving lens sesame 2 is provided on the end surface of the moving outer sesame 1, while a fixed lens sesame 4 is provided on the end surface of the fixed outer sesame 3. As a center, a fitting convex portion 6 having a tapered peripheral surface is provided. The taper angle of the fitting concave portion 5 and the taper angle of the fitting convex portion 6 are substantially equal to each other. As shown in the figure, the fitting convex portion 6 is inserted into the fitting concave portion 5 when the mold is closed, and the fitting convex portion 6 is fitted when the insertion is completed. The peripheral surface of the fitting convex portion 6 is evenly adhered to the peripheral surface of the fitting concave portion 5.
【００２３】レンズゴマ２，４の先端にそれぞれ所定形
状のレンズ成形面２ａ，４ａを有し、これにより成形品
の外形に相応するキャビティが形成される。The lens sesame 2 and 4 have lens molding surfaces 2a and 4a each having a predetermined shape at the tips thereof, so that a cavity corresponding to the outer shape of the molded product is formed.
【００２４】レンズゴマ２，４を挿入する外ゴマ１，３
の中央部にリティーナ収容部７がそれぞれ形成され、そ
こにボールリティーナ８が介在されている。ボールリテ
ィーナ８は、図１に示すように中心軸方向で５列に配列
された多数のボール９と、周壁に各ボール９を所定の間
隔をおいて回転自在に保持するボール保持筒１０から構
成されている。Outer sesame seeds 1 and 3 into which the lens sesame seeds 2 and 4 are inserted
Each of the retainer housings 7 is formed in the center of the ball retainer 7, and the ball retainer 8 is interposed therein. The ball retainer 8 is composed of a large number of balls 9 arranged in five rows in the central axis direction as shown in FIG. 1, and a ball holding cylinder 10 which holds each ball 9 on its peripheral wall rotatably at predetermined intervals. Has been done.
【００２５】ボール９は例えばベアリング鋼（硬度：Ｈ
ＲＣ５８）やステンレス鋼（ＳＵＳ４４０）などから構
成され、ボール保持筒１０は例えばステンレス鋼、真
鍮、硬質合成樹脂など各種材料から構成され、特に剛性
が高くて軽量なものは運動慣性力が小さく、軸方向の高
速往復運動性（例えば外ゴマ１からレンズゴマ２を突き
出して成形レンズを離型する際のレンズゴマ２の往復運
動）に優れている。ボール保持筒１０の周壁上でのボー
ル９の配列には、中心軸方向で５列の千鳥状（図１参
照）、３列の並列状（図２参照）ならびに螺旋状などが
あり、中心軸方向で複数列に配列されているのがよい。The balls 9 are made of, for example, bearing steel (hardness: H
RC58) or stainless steel (SUS440) and the like, and the ball holding cylinder 10 is made of various materials such as stainless steel, brass, and hard synthetic resin. Particularly, those having high rigidity and light weight have a small motion inertial force and a shaft. Is excellent in high-speed reciprocating motion in a direction (for example, reciprocating motion of the lens sesame 2 when the lens sesame 2 is projected from the outer sesame 1 to release the molded lens). The arrangement of the balls 9 on the peripheral wall of the ball holding cylinder 10 includes a staggered pattern of 5 rows (see FIG. 1), a parallel array of 3 rows (see FIG. 2), and a spiral shape in the central axis direction. It is preferable that the lines are arranged in a plurality of columns in the direction.
【００２６】図２に示すように各ボール９の一部はボー
ル保持筒１０の外周面ならびに内周面より若干突出し、
ボール保持筒１０の外周面より突出した部分は外ゴマ１
（３）の内周面に転接し、ボール保持筒１０の内周面よ
り突出した部分はレンズゴマ２（４）の外周面に転接す
る。As shown in FIG. 2, a part of each ball 9 slightly projects from the outer peripheral surface and the inner peripheral surface of the ball holding cylinder 10,
The portion protruding from the outer peripheral surface of the ball holding cylinder 10 is the outer sesame 1
The portion of the ball holding cylinder 10 that rolls on the inner peripheral surface of (3) and projects from the inner peripheral surface of the ball holding cylinder 10 rolls on the outer peripheral surface of the lens sesame 2 (4).
【００２７】レンズゴマ２（４）と、それを保持する外
ゴマ１（３）との間の隙間Ｘより僅かに（例えば数μｍ
程度）大きい径のボール９を用いることにより、ボール
９の弾性を利用して（僅かな予圧状態を保持して）、レ
ンズゴマ２（４）と外ゴマ１（３）の中心軸Ｙを一致さ
せることができるとともに、レンズゴマ２（４）と外ゴ
マ１（３）のコマどうしの間隔Ｚを均一に確保すること
ができる。Slightly (for example, several μm) from the gap X between the lens sesame 2 (4) and the outer sesame 1 (3) holding it.
By using the ball 9 having a large diameter, the elasticity of the ball 9 is used (a slight preload state is maintained) to match the central axes Y of the lens sesame 2 (4) and the outer sesame 1 (3). In addition, it is possible to secure a uniform space Z between the frames of the lens sesame 2 (4) and the outer sesame 1 (3).
【００２８】なお、ボール９の硬度は、それが転接する
外ゴマ１、３ならびにレンズゴマ２，４の硬度よりも若
干低いことが望ましい。この多数のボール９の回転によ
り、レンズゴマ２（４）は外ゴマ１（３）に対して軸方
向にスムーズにかつ安定に移動することができる。また
このようにボール保持筒１０に多数のボール９を分散、
保持することにより、外ゴマ１、３ならびにレンズゴマ
２，４に対する変動荷重や偏荷重が少なく、レンズゴマ
２（４）の正確な直進運動が可能となる。It is desirable that the hardness of the ball 9 is slightly lower than the hardness of the outer sesame 1 and 3 and the lens sesame 2 and 4 on which the ball 9 is rolling. The rotation of the large number of balls 9 allows the lens sesame 2 (4) to move smoothly and stably in the axial direction with respect to the outer sesame 1 (3). Further, in this way, a large number of balls 9 are dispersed in the ball holding cylinder 10,
By holding, the fluctuating load and the eccentric load on the outer sesame 1 and 3 and the lens sesame 2 and 4 are small, and the accurate linear movement of the lens sesame 2 (4) is possible.
【００２９】ボールリティーナ８を介して外ゴマ１とレ
ンズゴマ２の中心軸Ｙが一致し、外ゴマ３とレンズゴマ
４の中心軸Ｙが一致しており、しかも嵌合凹部５はレン
ズゴマ２を中心にして形成され、嵌合凸部６はレンズゴ
マ４を中心にして形成されているから、移動側外ゴマ１
と固定側外ゴマ３をテーパ嵌合することにより、移動側
レンズゴマ２と固定側レンズゴマ４の芯合わせが必然的
に行なわれる。そしてレンズゴマ２，４のレンズ成形面
２ａ，４ａによって形成されるキャビティ内に溶融状態
の透明樹脂を射出して充填、保圧することにより光学レ
ンズ１１を成形することができる。The center axes Y of the outer sesame 1 and the lens sesame 2 are aligned with each other through the ball retainer 8, the center axes Y of the outer sesame 3 and the lens sesame 4 are aligned, and the fitting recess 5 is centered on the lens sesame 2. Since the fitting convex portion 6 is formed around the lens sesame 4 as a center,
By tapering the stationary side outer sesame 3 and the stationary side sesame 3, the moving side lens sesame 2 and the stationary side lens sesame 4 are inevitably aligned with each other. Then, the optical lens 11 can be molded by injecting a molten transparent resin into the cavity formed by the lens molding surfaces 2a and 4a of the lens sesame 2 and 4 to fill and hold the resin.
【００３０】図１において２４は、レンズゴマ２，４の
軸方向の位置を調整するための調整ゴマである。In FIG. 1, reference numeral 24 is an adjusting sesame for adjusting the axial positions of the lens sesame 2 and 4.
【００３１】この実施形態では移動側外ゴマ１に嵌合凹
部５を、固定側外ゴマ３に嵌合凸部６を設けたが、その
反対に移動側外ゴマ１に嵌合凸部６を、固定側外ゴマ３
に嵌合凹部５を設けこともできる。In this embodiment, the moving-side outer sesame 1 is provided with the fitting concave portion 5 and the fixed-side outer sesame 3 is provided with the fitting convex portion 6. On the contrary, the moving-side outer sesame 1 is provided with the fitting convex portion 6. , Sesame outside fixed side 3
It is also possible to provide a fitting recess 5 in the.
【００３２】図３は、本発明の第２実施形態に係る射出
成形金型の断面図である。図中の１は移動側外ゴマ、２
は移動側レンズゴマでボールリティーナ８を介して移動
側外ゴマ１に移動可能に保持されている。３は固定側外
ゴマ、４は固定側レンズゴマでボールリティーナを介さ
ず直接固定側外ゴマ３に圧入されてクリアランスがない
ように一体化されている。FIG. 3 is a sectional view of an injection molding die according to the second embodiment of the present invention. 1 in the figure is sesame outside the moving side, 2
Is movably held by the moving side lens sesame on the moving side outer sesame 1 via the ball retainer 8. Reference numeral 3 is a fixed-side outer sesame, and 4 is a fixed-side lens sesame, which is directly press-fitted into the fixed-side outer sesame 3 without a ball retainer and integrated so that there is no clearance.
【００３３】１２はガイドブッシュで、固定側外ゴマ３
に圧入されてクリアランスがないように一体化されてお
り、ガイドブッシュ１２の下端開口部には周面にテーパ
面を有する嵌合凹部５が形成されている。１３はガイド
ピンで、移動側外ゴマ１に圧入されてクリアランスがな
いように一体化されており、ガイドピン１３の上端部に
は周面にテーパ面を有し、前記嵌合凹部５に密に嵌合す
る嵌合凸部６が形成されている。Reference numeral 12 denotes a guide bush, which is a fixed side outer sesame 3
The guide bush 12 is integrated so as to have no clearance, and a fitting recess 5 having a tapered surface on the peripheral surface is formed at the lower end opening of the guide bush 12. Reference numeral 13 is a guide pin, which is press-fitted into the moving-side outer sesame 1 so as to be integrated so that there is no clearance. The guide pin 13 has a tapered surface on the peripheral surface and is tightly fitted to the fitting recess 5. Is formed with a fitting convex portion 6 that fits into the.
【００３４】１４は固定側取付板、１５は固定側型板、
１６は移動側型板、１７は受け板、１８はスペーサブロ
ック、１９は移動側取付板、２０は突出しロッド、２１
はエジェクターピン、２２はエジェクターロックプレー
ト、２３はエジェクタープレートである。14 is a fixed side mounting plate, 15 is a fixed side template,
16 is a moving side template, 17 is a receiving plate, 18 is a spacer block, 19 is a moving side mounting plate, 20 is a protruding rod, 21
Is an ejector pin, 22 is an ejector lock plate, and 23 is an ejector plate.
【００３５】この実施形態では固定側外ゴマ３にガイド
ブッシュ１２を圧入し、移動側外ゴマ１にガイドピン１
３を圧入したが、固定側外ゴマ３に嵌合凹部５を一体に
形成したり、移動側外ゴマ１に嵌合凸部６を一体に形成
することもできる。In this embodiment, the guide bush 12 is press-fitted into the fixed outer sesame 3 and the guide pin 1 is fitted into the movable outer sesame 1.
Although 3 is press-fitted, the fitting side concave portion 5 may be integrally formed on the fixed side outer sesame 3, or the fitting convex portion 6 may be integrally formed on the moving side outer sesame 1.
【００３６】またこの実施形態では固定側外ゴマ３にガ
イドブッシュ１２（嵌合凹部５）を設け、移動側外ゴマ
１にガイドピン１３（嵌合凸部６を）を設けたが、反対
に固定側外ゴマ３にガイドピン１３（嵌合凸部６を）を
設け、移動側外ゴマ１にガイドブッシュ１２（嵌合凹部
５）を設けることも可能である。Further, in this embodiment, the guide bush 12 (fitting concave portion 5) is provided on the fixed side outer sesame 3, and the guide pin 13 (fitting convex portion 6) is provided on the moving side outer sesame 1. It is also possible to provide the fixed outer sesame 3 with the guide pin 13 (the fitting convex portion 6) and the movable outer sesame 1 with the guide bush 12 (the fitting concave portion 5).
【００３７】[0037]
【発明の効果】本発明は前述のような構成になってお
り、少なくとも移動側成形ゴマと移動側保持部材との間
の芯合わせが確実で、また成形ゴマと保持部材の隙間が
均一に確保でき、スムーズな安定した動きとなる。しか
も固定側金型とそれと対向する移動側保持部材とがテー
パ嵌合することにより、固定側金型と移動側金型の芯出
しが正確である。特に請求項２記載の発明によれば、固
定側金型と移動側金型の両方にボールリティーナが設け
られているから、固定側成形ゴマと移動側成形ゴマの芯
出しがより正確である。As described above, the present invention has the above-mentioned structure, and at least the moving-side molding sesame and the moving-side holding member are securely aligned with each other, and the gap between the molding sesame and the holding member is evenly secured. It is possible, and it becomes a smooth and stable movement. Moreover, the fixed-side mold and the moving-side holding member that faces the fixed-side mold are taper-fitted with each other, so that the fixed-side mold and the movable-side mold are accurately centered. In particular, according to the second aspect of the invention, since the ball retainer is provided in both the fixed-side mold and the moving-side mold, the centering of the fixed-side molding sesame and the moving-side molding sesame is more accurate.
【００３８】従って、図４で説明した従来のものに較べ
て、構造が簡単でかつ成形精度の高いプラスチック光学
レンズ用射出成形金型ならびにプラスチック光学レンズ
の製造方法を提供することができる。Therefore, it is possible to provide an injection molding die for a plastic optical lens having a simple structure and a high molding precision and a method for manufacturing the plastic optical lens as compared with the conventional one described with reference to FIG.
【図１】本発明の第１の実施形態に係る射出成形金型の
断面図である。FIG. 1 is a cross-sectional view of an injection molding die according to a first embodiment of the present invention.
【図２】その射出成形金型のボールリティーナ付近の拡
大断面図である。FIG. 2 is an enlarged cross-sectional view in the vicinity of a ball retainer of the injection molding die.
【図３】本発明の第１の実施形態に係る射出成形金型の
断面図である。FIG. 3 is a cross-sectional view of an injection molding die according to the first embodiment of the present invention.
【図４】従来の射出成形金型の断面図である。FIG. 4 is a sectional view of a conventional injection mold.
１ 移動側外ゴマ ２ 移動側レンズゴマ ２ａ 移動側レンズゴマの成形面 ３ 固定側外ゴマ ４ 固定側レンズゴマ ４ａ 固定側レンズゴマの成形面 ５ 嵌合凹部 ６ 嵌合凸部 ７ リティーナ収容部 ８ ボールリティーナ ９ ボール １０ ボール保持筒 １１ 光学レンズ １２ ガイドブッシュ １３ ガイドピン 1 Sesame outside the moving side 2 Moving side lens sesame 2a Moving side lens sesame molding surface 3 fixed side sesame 4 Fixed side lens sesame 4a Molding surface of fixed side lens sesame 5 Fitting recess 6 Fitting convex part 7 Retina Containment 8 Ball Retina 9 balls 10 ball holder 11 Optical lens 12 Guide bush 13 Guide pin
───────────────────────────────────────────────────── フロントページの続き (72)発明者 渋谷 浩之 宮城県亘理郡亘理町逢隈田沢字神明42−２ 株式会社東伸精工内 Ｆターム(参考） 4F202 AG19 AH74 CA11 CB01 CK42 CR06 4F206 AH74 JA07 JQ81 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Hiroyuki Shibuya 42-2 Shinmei, Aisuma Tazawa, Watari Town, Watari District, Miyagi Prefecture Toshin Seiko Co., Ltd. F-term (reference) 4F202 AG19 AH74 CA11 CB01 CK42 CR06 4F206 AH74 JA07 JQ81
Claims (3)
動側成形ゴマと、その移動側成形ゴマを外側から保持す
る移動側保持部材と、ボール保持筒の周壁にボールを間
隔をおいて回転可能に保持した移動側ボールリティーナ
を備え、 その移動側ボールリティーナを移動側成形ゴマと移動側
保持部材の間に介挿して、ボールの介在で移動側成形ゴ
マと移動側保持部材の芯合わせを行ない、 かつ、前記移動側保持部材または固定側金型のいずれか
一方に、周面にテーパ面を有する嵌合凹部を設け、 固定側金型または移動側保持部材のいずれか他方に、周
面にテーパ面を有し前記嵌合凹部と嵌合する嵌合凸部を
設けたことを特徴とするプラスチック光学レンズ用射出
成形金型。1. A moving side molding sesame having a stationary side mold and a moving side mold, wherein at least the moving side mold has a moving side molding surface, and a moving side holding the moving side molding sesame from the outside. A holding member and a moving-side ball retainer that rotatably holds balls on the peripheral wall of the ball-holding cylinder at an interval are provided, and the moving-side ball retainer is inserted between the moving-side molding sesame and the moving-side holding member. The moving-side molding sesame and the moving-side holding member are centered by interposing balls, and a fitting concave portion having a tapered surface on the circumferential surface is provided on either the moving-side holding member or the fixed-side mold. An injection molding die for a plastic optical lens, characterized in that a fitting convex portion having a tapered surface on a peripheral surface and fitted to the fitting concave portion is provided on either the fixed side mold or the moving side holding member. Type.
用射出成形金型において、前記固定側金型が、固定側成
形面を有する固定側成形ゴマと、その固定側成形ゴマを
外側から保持すル保持筒の周壁にボールを間隔をおいて
回転可能に保持した固定側ボールリティーナを備え、 前記固定側ボールリティーナを固定側成形ゴマと固定側
保持部材の間に介挿して、ボールの介在で固定側成形ゴ
マと固定側保持部材の芯合わせを行なうことを特徴とす
るプラスチック光学レンズ用射出成形金型。2. The injection-molding die for a plastic optical lens according to claim 1, wherein the fixed-side die has a fixed-side molding sesame having a fixed-side molding surface, and a mold for holding the fixed-side molding sesame from the outside. The peripheral wall of the holding cylinder is provided with a fixed side ball retainer that rotatably holds balls at intervals, and the fixed side ball retainer is inserted between the fixed side molding sesame and the fixed side holding member and fixed by the ball. An injection molding die for a plastic optical lens, wherein the side molding sesame and the fixed side holding member are aligned with each other.
ック光学レンズ用射出成形金型を用い、前記固定側金型
と移動側金型を接合して、両者間に形成されるキャビテ
ィ内に溶融樹脂を射出、充填してプラスチック光学レン
ズを製造することを特徴とするプラスチック光学レンズ
の製造方法。3. An injection molding die for a plastic optical lens according to claim 1 or 2, wherein the fixed side die and the moving side die are joined and melted in a cavity formed therebetween. A method for producing a plastic optical lens, which comprises producing a plastic optical lens by injecting and filling a resin.
Priority Applications (1)
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| JP2002367096A JP4121365B2 (en) | 2002-12-18 | 2002-12-18 | Injection mold for plastic optical lens and method for producing plastic optical lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002367096A JP4121365B2 (en) | 2002-12-18 | 2002-12-18 | Injection mold for plastic optical lens and method for producing plastic optical lens |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001022060A Division JP3430208B2 (en) | 2001-01-30 | 2001-01-30 | Injection mold for plastic optical lens and method of manufacturing plastic optical lens |
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|---|---|---|---|
| JP2003331853A Division JP3789447B2 (en) | 2003-09-24 | 2003-09-24 | Injection mold and injection molding method |
| JP2008018816A Division JP2008120097A (en) | 2008-01-30 | 2008-01-30 | Injection molding die for plastic optical lens and method for manufacturing plastic optical lens |
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| JP2003231159A true JP2003231159A (en) | 2003-08-19 |
| JP2003231159A5 JP2003231159A5 (en) | 2008-03-13 |
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