JP2827293B2 - Lens mold - Google Patents
Lens moldInfo
- Publication number
- JP2827293B2 JP2827293B2 JP1170964A JP17096489A JP2827293B2 JP 2827293 B2 JP2827293 B2 JP 2827293B2 JP 1170964 A JP1170964 A JP 1170964A JP 17096489 A JP17096489 A JP 17096489A JP 2827293 B2 JP2827293 B2 JP 2827293B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molding
- lens
- press
- lower mold
- 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 - Fee Related
Links
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
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は同じ金型を用いてレンズを複数成形する技術
に関するものである。Description: TECHNICAL FIELD The present invention relates to a technique for molding a plurality of lenses using the same mold.
従来の技術 従来、金型を用いて複数のレンズを成形する場合プレ
ス軸方向以外には金型が動かないようにして常に金型の
仕上げ面の同一の領域を用いている。このように連続し
て同一の領域を用いてプレス成形する場合、金型がブラ
ンクによって局部的に加熱されたり、付着物が堆積した
りする。また、これらの原因のために金型の仕上げ面を
均一な温度に保てなくなったりする。そして、ついには
成形したレンズに欠陥を生じるようになる。このように
従来は金型の連続使用回数は限られているので、頻繁に
金型を交換する必要があり、そのロスタイムは金型の位
置調整も含めて大きなものであった。2. Description of the Related Art Conventionally, when a plurality of lenses are formed using a mold, the same area of the finished surface of the mold is always used so that the mold does not move in directions other than the press axis direction. When the press molding is continuously performed using the same region as described above, the mold is locally heated by the blank, or deposits are deposited. Also, due to these causes, the finished surface of the mold cannot be maintained at a uniform temperature. Eventually, a defect occurs in the molded lens. As described above, conventionally, the number of continuous use of the mold is limited, so that the mold needs to be frequently replaced, and the loss time is large including the adjustment of the position of the mold.
発明が解決しようとする課題 本発明は、複数回レンズの成形を行う場合の金型の使
用回数を増加させて金型交換の回数を減らすことを課題
としている。SUMMARY OF THE INVENTION An object of the present invention is to reduce the number of mold replacements by increasing the number of times the mold is used when performing lens molding a plurality of times.
課題を解決するための手段 このために、本発明では広い仕上げ面を有するこのた
めに、本発明は、ブランクをプレス成形することによっ
てレンズを作るための金型において、プレス成形時にお
けるブランクの接触面より広い仕上げ面を有し、一つの
直線を回転軸として回転可能に支持台に支持されるよう
に構成され、任意の回数のプレス成形後に、それまでと
は接触面の位置が変わるように前記回転軸周りに回転さ
れて用いられる。Means for Solving the Problems To this end, the present invention has a wide finished surface. For this reason, the present invention relates to a mold for making a lens by press-forming a blank. With a finishing surface wider than the surface, it is configured to be rotatably supported on a support base with one straight line as a rotation axis, so that the position of the contact surface changes from before until after any number of press moldings It is used by being rotated around the rotation axis.
作用 これによって、金型の仕上げ面を任意の回数使用後に
変更して用いることができ１つの金型の使用できる回数
を従来より多くすることができる。Operation With this, the finished surface of the mold can be used after being changed an arbitrary number of times, and the number of times one mold can be used can be increased more than before.
実施例 第１図から第４図に基づいて、本発明の第１の実施例
について説明する。第１図はガラスレンズ成形装置の金
型部分だけを示しており、レンズのプレス成形直前状態
を示している。下型台（３）には半球状の下型（１）が
取り付けられており、この下型（１）は球の軸（６）を
中心に回転可能である。下型（１）の仕上げ面はプレス
成形時のガラスブランク（４）との接触面積に対しては
るかに広く、この接触面に軸（６）が通らないように軸
（６）の傾きを選んでいる。（たとえば、プレス軸に対
して45゜の角度）なお、下型（１）の球心は当然レンズ
（４′）の凹面の曲率中心に合わせている。Embodiment 1 A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows only a mold portion of a glass lens forming apparatus, and shows a state immediately before press forming of a lens. A hemispherical lower mold (1) is attached to the lower mold base (3), and the lower mold (1) is rotatable around a sphere axis (6). The finished surface of the lower mold (1) is much larger than the contact area with the glass blank (4) at the time of press molding, and the inclination of the axis (6) is selected so that the axis (6) does not pass through this contact surface. In. (For example, an angle of 45 degrees with respect to the press axis) The center of the lower mold (1) is naturally aligned with the center of curvature of the concave surface of the lens (4 ').
第１図の成形直前の状態において、下型（１）と上型
（２）とをレンズ成形に適した温度に不図示のヒーター
によってあらかじめ加熱しておき、下型（１）上に軟化
されたガラスブランク（４）を置く、そして、上型
（２）を降下させ第２図に示すようにプレス成形を１回
行い、ガラスブランク（４）をレンズ（４′）に成形す
る。成形後、上型（２）を第３図に示す位置まで上昇さ
せ、プレス成形されたレンズ（４′）を取り除く。In the state immediately before the molding in FIG. 1, the lower mold (1) and the upper mold (2) are previously heated to a temperature suitable for lens molding by a heater (not shown), and are softened on the lower mold (1). The glass blank (4) is placed, the upper mold (2) is lowered, and press molding is performed once as shown in FIG. 2 to form the glass blank (4) into a lens (4 '). After molding, the upper mold (2) is raised to the position shown in FIG. 3, and the pressed lens (4 ') is removed.
この１回目のプレス成形時の下型（１）とレンズ
（４′）との接触面が第４図の（７）に示される領域で
あるとすると、次回の接触面が（８）に示される領域に
なるように、第３図の状態から下型（１）は軸（６）を
中心に回転し下型台（３）に再び固定される。以下、第
１図から第３図に示された状態を繰り返すことによって
連続してレンズ成形が行なわれる。Assuming that the contact surface between the lower mold (1) and the lens (4 ') during the first press molding is the area shown in (7) of FIG. 4, the next contact surface is shown in (8). From the state shown in FIG. 3, the lower mold (1) rotates about the shaft (6) and is fixed to the lower mold base (3) again so as to be in a region to be moved. Hereinafter, the lens molding is continuously performed by repeating the states shown in FIGS. 1 to 3.
第４図に示したようにこの実施例では、プレス成形時
の下型（１）とレンズ（４′）との接触する領域が一部
重なるようにして下型（１）の仕上げ面を有効に使い、
下型（１）の使用回数を増やすようにしているが、第５
図に示すように領域が重ならないようにしてもよい。As shown in FIG. 4, in this embodiment, the finished surface of the lower mold (1) is made effective so that the contact area between the lower mold (1) and the lens (4 ') during press molding partially overlaps. Used for
Although the number of uses of the lower mold (1) is increased,
As shown in the figure, the regions may not overlap.
また、この実施例では１回のプレス成形ごとに必ず下
型（１）を回転させてまったく同じ領域が用いられない
ようにしたが、数回ずつ連続して用いるようにしてもよ
い。さらに、成形したレンズに欠陥が生じるようになる
まで同じ領域を連続して用いてからまったく別の領域を
用いるようにしてもよい。Further, in this embodiment, the lower mold (1) is always rotated so that the same area is not used every time one press molding is performed, but it may be used several times continuously. Further, the same region may be used continuously until a defect occurs in the molded lens, and then a completely different region may be used.
次に、第２の実施例について第６図を用いて説明す
る。第１の実施例では下型（１）の実際に用いる仕上げ
面は半球の一部だけだったが、第２の実施例では全球状
の下型を使ってその表面のほとんどを仕上げ面として用
いることができる。Next, a second embodiment will be described with reference to FIG. In the first embodiment, the actually used finished surface of the lower mold (1) is only a part of the hemisphere, but in the second embodiment, almost all of the surface is used as the finished surface by using the spherical lower mold. be able to.
第６図において、全球状の下型（13）は互いに直交す
る軸（6,12）を持っており、これらの軸によって下型台
（３）に回転可能に保持されている。このため下型
（１）は上型（２）に対してどの面でも向けることが可
能である。In FIG. 6, a lower mold (13) having a spherical shape has axes (6, 12) orthogonal to each other, and is rotatably held on the lower mold base (3) by these axes. For this reason, the lower mold (1) can be directed to the upper mold (2) on any surface.
ただし、実際には軸の位置には軸受け等の部材が設け
られるので、これらの部材がプレス成形時にガラスブラ
ンク（４）に接するような位置に来ないように下型
（１）の回転位置を制御する。However, since members such as bearings are actually provided at the position of the shaft, the rotational position of the lower mold (1) is adjusted so that these members do not come into contact with the glass blank (4) during press forming. Control.
なお、上記の実施例での上型は従来と同じように単に
プレス軸の方向に移動するだけであったが、下型のよう
な金型を用いこれを回転させて使用するようにしてもよ
い。Although the upper mold in the above embodiment merely moved in the direction of the press shaft as in the conventional case, it is also possible to use a mold such as a lower mold and rotate it to use. Good.
発明の効果 このように金型のブランクとの接触面の位置が変更さ
れるように、金型が仕上げ面の曲率中心を通る一つの回
転軸周りに回転される。ようにしたので、たとえ同じ領
域を使い続けてレンズに欠陥が生じるようになっても、
金型を交換せずにブランクとの接触面の位置を変更する
ように、金型の仕上げ面の曲率中心を通る一つの直線を
回転軸として回転させるだけで成形を続けることがで
き、金型交換の回数を減らすことができる。Effect of the Invention The mold is rotated around one rotation axis passing through the center of curvature of the finished surface so that the position of the contact surface of the mold with the blank is changed in this way. So, even if you continue to use the same area and the lens becomes defective,
Molding can be continued by simply rotating one straight line passing through the center of curvature of the finished surface of the mold as a rotation axis so that the position of the contact surface with the blank is changed without replacing the mold. The number of replacements can be reduced.
特に、１回の成形ごとに金型のブランクとの接触面の
位置を変更するように、金型をの仕上げ面の曲率中心を
通る一つの直線を回転軸として回転移動させるようにし
た場合ブランクの熱と付着堆積物との相乗効果による金
型の劣化が緩和され、同一の金型を使用できる回数は飛
躍的に多くなり、金型交換の回数をかなり減らすことが
できる。In particular, when the mold is rotated around a straight line passing through the center of curvature of the finished surface of the mold so as to change the position of the contact surface of the mold with the blank each time molding is performed, the blank is used. The deterioration of the mold due to the synergistic effect of the heat and the attached deposits is alleviated, and the number of times that the same mold can be used is greatly increased, so that the number of mold exchanges can be considerably reduced.
また、金型を仕上げ面の曲率中心を通る一つの直線を
回転軸として回転移動させる場合金型の回転移動の中心
を仕上げ面の曲率中心にしたので、回転移動しても上下
両金型間の距離は変わらず金型回転時の距離調整の必要
がなく、かつ金型の温度を冷却することなく作業を行う
ことが可能であるめ、従来のような距離調節のため、あ
るいは冷却のためのロスタイムが金型回転時にはない。When the mold is rotated around a straight line passing through the center of curvature of the finished surface as the rotation axis, the center of the rotational movement of the mold is the center of curvature of the finished surface. The distance does not change, and it is not necessary to adjust the distance when rotating the mold, and it is possible to work without cooling the temperature of the mold, for the conventional distance adjustment or for cooling No loss time during mold rotation.
第１図はガラスブランクを本発明のレンズ成形用金型に
よってプレス成形する直前の状態を示し、第２図は同じ
くプレス成形中の状態を示し、第３図は同じくプレス成
形後の状態を示し、第４図は本発明の金型を複数回使用
したときの金型とガラスブランクとの接触領域の１例を
示し、第５図はやはり本発明の金型を複数回使用すると
きの接触領域の他の例を示し、第６図は本発明のプレス
成形用金型の別の実施例を示している。 １……下型、２……上型 ３……下型台、４……ガラスブランク ４′……レンズ、５……曲率中心 ６……軸、７〜11……接触領域 12……軸FIG. 1 shows a state immediately before press-molding a glass blank by a lens molding die of the present invention, FIG. 2 shows a state during press-molding, and FIG. 3 shows a state after press-molding. FIG. 4 shows an example of a contact area between the mold and the glass blank when the mold of the present invention is used plural times, and FIG. 5 also shows a contact area when the mold of the present invention is used plural times. FIG. 6 shows another embodiment of the press-molding die according to the present invention. DESCRIPTION OF SYMBOLS 1 ... Lower mold 2 ... Upper mold 3 ... Lower mold stand 4 ... Glass blank 4 '... Lens 5 ... Center of curvature 6 ... Axis, 7-11 ... Contact area 12 ... Axis
Claims (2)
ンズを作るための金型において、 プレス成形時におけるブランクとの接触面より広い仕上
げ面を有し、 一つの直線を回転軸として回転可能に支持台に支持され
るように構成され、 任意の回数のプレス成形後にそれまでとは接触面の位置
が変わるように、前記回転軸周りに回転されて用いられ
ることを特徴とするレンズ成形用金型。1. A mold for forming a lens by press-molding a blank, comprising a finished surface wider than a contact surface with the blank at the time of press-molding, and a support base rotatable around one straight line as a rotation axis. A lens molding die which is used by being rotated about the rotation axis so that the position of the contact surface is changed after press molding of an arbitrary number of times.
請求項１記載のレンズ成形用金型。2. The lens molding die according to claim 1, wherein the finished surface has a perfect spherical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1170964A JP2827293B2 (en) | 1989-06-30 | 1989-06-30 | Lens mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1170964A JP2827293B2 (en) | 1989-06-30 | 1989-06-30 | Lens mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0337122A JPH0337122A (en) | 1991-02-18 |
| JP2827293B2 true JP2827293B2 (en) | 1998-11-25 |
Family
ID=15914637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1170964A Expired - Fee Related JP2827293B2 (en) | 1989-06-30 | 1989-06-30 | Lens mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2827293B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1676510A1 (en) | 2005-01-03 | 2006-07-05 | Teak Tub ApS | A tub made from wood and having a wooden bottom plate |
-
1989
- 1989-06-30 JP JP1170964A patent/JP2827293B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0337122A (en) | 1991-02-18 |
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