JPH07118026A - Mold for forming optical element - Google Patents
Mold for forming optical elementInfo
- Publication number
- JPH07118026A JPH07118026A JP28750693A JP28750693A JPH07118026A JP H07118026 A JPH07118026 A JP H07118026A JP 28750693 A JP28750693 A JP 28750693A JP 28750693 A JP28750693 A JP 28750693A JP H07118026 A JPH07118026 A JP H07118026A
- Authority
- JP
- Japan
- Prior art keywords
- molding
- mold
- molds
- pair
- die
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/40—Product characteristics
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ガラス素材を加熱軟化
して押圧成形する光学素子成形型に係り、特にプリズム
等の隣接する有効面間の稜部を鋭利な形状に成形し得る
光学素子成形型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical element molding die for softening and pressing a glass material by heating, and in particular, an optical element capable of forming a ridge between adjacent effective surfaces such as prisms into a sharp shape. Regarding the mold.
【０００２】[0002]
【従来の技術】加熱軟化したガラス素材を成形型で押圧
し、プリズム等の隣接する有効面間に稜部を有する光学
素子を成形する際、ガラス素材が有効面間の稜部成形部
分の奥（先端）まで進入することができず、成形された
光学素子は稜部の先端が丸く曲率状になっていた。2. Description of the Related Art When a glass material that has been softened by heating is pressed by a molding die to form an optical element having a ridge between adjacent effective surfaces such as a prism, the glass material is deep inside the ridge forming portion between the effective surfaces. The tip of the ridge of the molded optical element could not reach the (tip), and the tip of the ridge was round and curved.
【０００３】そこで、従来、稜部の先端を鋭利に成形す
る成形金型が実開昭５８−１５３０１３号公報において
提案されており、以下に図６を用いて説明する。図８は
前記成形金型を示す縦断面図で、光学素子の隣接する有
効面を成形する成形面２５ａ，２６ａを有する成形型２
５，２６と、成形型２５，２６の間の稜部に設けた可動
駒２７と、成形型２５，２６の上方に設けたベース型２
８とからなり、押圧成形中に可動駒２７を可動アクチュ
エータ２９により成形品３０側に押し込むことによって
内部圧力を高め、成形中のひけ及び前記稜部の丸い曲率
状を小さく改善し得るように構成されている。Therefore, conventionally, a molding die for sharply molding the tip of the ridge has been proposed in Japanese Utility Model Laid-Open No. 58-153013, which will be described below with reference to FIG. FIG. 8 is a longitudinal sectional view showing the molding die, which is a molding die 2 having molding surfaces 25a and 26a for molding adjacent effective surfaces of an optical element.
5, 26, the movable piece 27 provided at the ridge between the molding dies 25, 26, and the base mold 2 provided above the molding dies 25, 26.
8 is configured so that the movable piece 27 is pushed toward the molded product 30 side by the movable actuator 29 during the press molding, so that the internal pressure can be increased and the sink mark during molding and the rounded curvature of the ridge can be reduced. Has been done.
【０００４】[0004]
【発明が解決しようとする課題】しかし、確かに前記従
来の技術によると、成形された光学素子３０の有効面間
の稜部の丸みの曲率を小さくできるが、押し込む可動駒
２７とその両脇に存在する２つの成形型２５，２６とに
より形成される成形面２５ａ，２６ａに接合線ができて
しまうため、その接合線が成形品３０に転写してしまい
光学性能上思わしくないという問題点があった。However, according to the above-mentioned conventional technique, the curvature of the roundness of the ridge between the effective surfaces of the molded optical element 30 can be made small, but the movable piece 27 to be pushed in and both sides thereof can be reduced. Since a bonding line is formed on the molding surfaces 25a and 26a formed by the two molding dies 25 and 26 existing in the above, the bonding line is transferred to the molded product 30, which is not desirable in terms of optical performance. there were.
【０００５】本発明は、前記従来技術の問題点に鑑みな
されたもので、従来からの問題であった光学素子の有効
面間の稜部の曲率を小さくし、かつ従来技術のように可
動駒等の別部品による押し込み部材を使用せずに内部圧
力を高めて光学有効面の稜部近傍に接合線のない成形品
を製造できる光学素子成形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-mentioned problems of the prior art. The curvature of the ridge between the effective surfaces of the optical element, which has been a problem in the prior art, is reduced, and the movable piece as in the prior art is used. It is an object of the present invention to provide an optical element molding die capable of producing a molded product having no bonding line in the vicinity of the ridge of the optically effective surface by increasing the internal pressure without using a pressing member formed by another component such as.
【０００６】[0006]
【課題を解決するための手段】図１に基づき本発明の構
成を説明する。光学素子の隣り合う有効面をそれぞれ成
形する成形面１ａ，２ａを有する一対の成形型１，２が
横方向に対向配置され、一対の成形型１，２には成形型
１，２を同時に上方に押圧すべく上下動アクチュエータ
３が接続されている。さらに、前記一対の成形型１，２
には、成形型１，２を横方向に移動して挟持接触させる
挟持アクチュエータ４ａ，４ｂが各々接続されている。
また、一対の成形型１、２の上方には一対の成形型１，
２と対向してベース型５が固定されている。The structure of the present invention will be described with reference to FIG. A pair of molding dies 1 and 2 having molding surfaces 1a and 2a for respectively molding adjacent effective surfaces of the optical element are laterally opposed to each other, and the molding dies 1 and 2 are simultaneously raised above the pair of molding dies 1 and 2. A vertical movement actuator 3 is connected to press the. Further, the pair of molding dies 1, 2
Clamping actuators 4a and 4b are respectively connected to the molding dies 1 and 2 to move the molding dies 1 and 2 in a lateral direction to clamp and contact them.
Further, above the pair of molding dies 1 and 2, a pair of molding dies 1,
The base mold 5 is fixed so as to face 2.
【０００７】[0007]
【作用】つぎに、上記構成の作用を図１から図３を用い
て説明する。図１に示すように、成形する光学素子の成
形素材であるガラスゴブ６を前記一対の成形型１，２の
成形面１ａ，２ａ上に置き、ベース型５の成形面５ａと
ともに挟持する。このとき成形型１と成形型２とベース
型５とは離した状態に置かれ、各型１、２、５の間には
各々隙間が設定されている。Next, the operation of the above structure will be described with reference to FIGS. As shown in FIG. 1, a glass gob 6 which is a molding material for an optical element to be molded is placed on the molding surfaces 1a and 2a of the pair of molding dies 1 and 2 and sandwiched together with the molding surface 5a of the base mold 5. At this time, the molding die 1, the molding die 2, and the base die 5 are placed in a state of being separated from each other, and gaps are set between the respective dies 1, 2, 5.
【０００８】第１の成形は前記一対の成形型１，２を上
下動アクチュエータ３によって同時に上方向へ移動して
ガラスゴブ６を成形する。このときベース型５に成形型
１、２の上面が接触し、この時点でガラスゴブ６は成形
面１ａ，２ａ，５ａで押圧され成形品形状７となる。し
かして、成形品形状７の有効面間にある稜部にガラスゴ
ブ６が入り込めずに丸くなり曲率状になっている（図２
参照）。In the first molding, the pair of molding dies 1 and 2 are simultaneously moved upward by the vertical movement actuator 3 to mold the glass gob 6. At this time, the upper surfaces of the molding dies 1 and 2 come into contact with the base mold 5, and at this time, the glass gob 6 is pressed by the molding surfaces 1a, 2a and 5a to form the molded product shape 7. As a result, the glass gob 6 cannot enter the ridge portion between the effective surfaces of the molded product shape 7 and is rounded to have a curved shape (FIG. 2).
reference).
【０００９】第２の成形は前記成形型１を挟持アクチュ
エータ４ａ及び成形型２を挟持アクチュエータ４ｂによ
り横方向に移動し、一対の成形型１，２を挟持当接させ
ることで前記成形品形状６ａを成形品６ｂに成形する。
この第２の成形により成形品形状７に更に圧縮を加える
ことで、成形型１と成形型２、成形型１，２とベース型
５、ベース型５の各稜部成形部分へのガラスの侵入を容
易にし、かつ各型１，２，５で挟み込むように成形する
ので容易に各型１，２，５の各稜部成形部分にガラスを
押し込むことができるようになる。つまり成形品８の稜
部を鋭く曲率の小さい成形を実現する（図３参照）。In the second molding, the molding die 1 is clamped by the clamping actuator 4a and the molding die 2 is laterally moved by the clamping actuator 4b, and the pair of molding dies 1 and 2 are clamped and brought into contact with each other to form the molded product shape 6a. Is molded into a molded product 6b.
By further compressing the shape 7 of the molded product by this second molding, the invasion of the glass into the molding portions of the molding dies 1 and 2, the molding dies 1 and 2, the base mold 5, and the base mold 5. Since the molding is performed easily and the molding is performed so as to be sandwiched between the molds 1, 2, and 5, the glass can be easily pressed into the ridge-shaped molding portions of the molds 1, 2, and 5. That is, the ridge of the molded product 8 is formed sharply and with a small curvature (see FIG. 3).
【００１０】[0010]
【実施例１】図４は本発明の実施例１を示し、図４
（Ａ）はガラスゴブを供給した状態を示す断面図、図４
（Ｂ）は第１の成形状態を示す断面図、図４（Ｃ）は第
２の成形状態を示す断面図である。一対の成形型１，２
は当接かつ離反可能に型マウント９上で対向して共に載
置されている。成形型１と成形型２には、成形品の隣り
合う有効面を成形する成形面１ａ，２ａが所定角度をも
って対向するように設けられている。[Embodiment 1] FIG. 4 shows Embodiment 1 of the present invention.
FIG. 4A is a sectional view showing a state in which a glass gob is supplied, FIG.
4B is a cross-sectional view showing the first molding state, and FIG. 4C is a cross-sectional view showing the second molding state. A pair of molds 1 and 2
Are mounted on the mold mount 9 so as to be able to come into contact with and separate from each other so as to face each other. The molding dies 1 and 2 are provided so that molding surfaces 1a and 2a for molding adjacent effective surfaces of a molded product face each other at a predetermined angle.
【００１１】型マウント９の両端には、上方に立ち上げ
たアーム部１０ａ，１０ｂが一体的に形成され、アーム
部１０ａ及びアーム部１０ｂには挟持アクチュエータ４
ａ及び挟持アクチュエータ４ｂが各々取り付けられてい
る。挟持アクチュエータ４ａ及び挟持アクチュエータ４
ｂの先端には前記成形型１及び成形型２が各々接続さ
れ、成形型１，２を対向する方向に各々移動して一対の
成形型１，２を挟持押圧しかつ離反し得るようになって
いる。また、型マウント９の下端には上下動アクチュエ
ータ３が接続されており、型マウント９を一対の成形型
１，２と共に上下動できるようになっている。前記一対
の成形型１，２の上方にはベース型５が固設されてい
る。ベース型５は断面がコ字状に形成され、その内面に
成形面５ａが設けられている。Arm portions 10a and 10b which are erected upward are integrally formed on both ends of the mold mount 9, and the holding actuator 4 is provided on the arm portions 10a and 10b.
a and the clamping actuator 4b are attached respectively. Clamping actuator 4a and clamping actuator 4
The mold 1 and the mold 2 are connected to the tip of b, respectively, so that the molds 1 and 2 can be respectively moved in opposite directions to sandwich and press the pair of molds 1 and 2 and separate them. ing. A vertical movement actuator 3 is connected to the lower end of the mold mount 9 so that the mold mount 9 can be vertically moved together with the pair of molding dies 1 and 2. A base die 5 is fixedly installed above the pair of molding dies 1 and 2. The base mold 5 has a U-shaped cross section, and a molding surface 5a is provided on the inner surface thereof.
【００１２】前記成形型１と成形型２及び一対の成形型
１，２とベース型５の間には隙間が設定できるように構
成され、この隙間を設けた状態で一対の成形型１，２お
よびベース型５とにより形成される空間にガラスゴブ６
が供給されるようになっている。A gap can be set between the molding die 1 and the molding die 2 and between the pair of molding dies 1 and 2 and the base die 5, and the pair of molding dies 1 and 2 is provided with the clearance. And the glass gob 6 in the space formed by the base mold 5 and
Are being supplied.
【００１３】つぎに、上記構成からなる光学素子成形型
の作用を説明する。まず、図４（Ｂ）に示すように、第
１の成形をして上下動アクチュエータ３により型マウン
ト９を上昇して型マウント９上に載置した一対の成形型
１，２を上昇させ、一対の成形型１，２の上面とベース
型５のコ字状部の下面とを当接する第１の成形を行い、
ガラスゴブ６を成形品形状７に成形する。このとき各型
１，２，５の有効面の稜部成形部分に入り込めないゴブ
は曲率状となっている。この稜部を尖らせるため、以下
に説明する第２の成形を行なう。Next, the operation of the optical element molding die having the above construction will be described. First, as shown in FIG. 4B, the pair of molding dies 1 and 2 placed on the mold mount 9 is lifted by performing the first molding and raising the mold mount 9 by the vertical movement actuator 3. The first molding is performed in which the upper surfaces of the pair of molding dies 1 and 2 and the lower surface of the U-shaped portion of the base mold 5 are in contact with each other,
The glass gob 6 is molded into a molded product shape 7. At this time, the gob that cannot enter the ridge forming portion of the effective surface of each of the molds 1, 2, 5 has a curved shape. In order to make this ridge point sharp, the second molding described below is performed.
【００１４】第２の成形として、図４（Ｃ）に示すよう
に、型マウント９のアーム部１０ａ，１０ｂに各々取り
付けた挟持アクチュエータ４ａ，４ｂを作動して成形型
１，２を移動して一対の成形型１，２を当接する。この
第２の成形により、成形品形状７のガラスは圧縮されて
内圧が高まり各型１，２，５の有効面の稜部成形部分に
入り込んでいく。そして、このとき稜部のガラスを挟み
込むように成形するためにゴブの曲率状が押しつぶされ
て鋭利な曲率の小さい稜部をもつ成形品８が成形され
る。As the second molding, as shown in FIG. 4C, the clamping actuators 4a and 4b attached to the arms 10a and 10b of the mold mount 9 are operated to move the molding dies 1 and 2. The pair of molding dies 1 and 2 are brought into contact with each other. By this second molding, the glass of the molded product shape 7 is compressed and the internal pressure is increased, and the glass of the molded product shape 7 enters the ridge portion molding portion of the effective surface of each mold 1, 2, 5. At this time, since the glass at the ridge portion is formed so as to sandwich the glass, the curvature of the gob is crushed to form a molded product 8 having a sharp ridge portion with a small curvature.
【００１５】本実施例によれば、型マウント９上に隣り
合う一対の成形型１，２を同時に移動し得るように載置
することで、成形時の位置決めと上下圧縮、挟持圧縮を
簡易に行なうことができる。According to the present embodiment, the pair of molding dies 1 and 2 adjacent to each other are mounted on the mold mount 9 so that they can be moved at the same time, thereby facilitating positioning, vertical compression, and clamping compression during molding. Can be done.
【００１６】[0016]
【実施例２】図５は本発明の実施例２を示し、図５
（Ａ）はガラスゴブを供給した状態を示す断面図、図５
（Ｂ）は第１の成形状態を示す断面図、図５（Ｃ）は第
２の成形状態を示す断面図である。一対の成形型１，２
は当接かつ離反可能に型支持台１３上で対向して共に載
置されている。成形型１と成形型２には、成形品の隣り
合う有効面を成形する成形面１ａ，２ａが所定角度をも
って対向するように設けられている。また、一対の成形
型１，２の上端には、成形面１ａ，２ａと反対側に突出
させた突出部１１，１２が各々形成され、各突出部１
１，１２の下面の根元部分に支持凹部１１ａ，１２ａが
各々設けられている。この支持凹部１１ａ，１２ａには
上記型支持台１３の２つに分岐した各々の支持先端１４
が挿入され、この支持先端１４を支点にして成形型１、
２が回転可能に支持されている。Second Embodiment FIG. 5 shows a second embodiment of the present invention.
FIG. 5A is a sectional view showing a state in which a glass gob is supplied, FIG.
FIG. 5B is a sectional view showing a first molding state, and FIG. 5C is a sectional view showing a second molding state. A pair of molds 1 and 2
Are mounted on the mold support 13 so that they can come into contact with and separate from each other while facing each other. The molding dies 1 and 2 are provided so that molding surfaces 1a and 2a for molding adjacent effective surfaces of a molded product face each other at a predetermined angle. Further, at the upper ends of the pair of molding dies 1 and 2, projecting portions 11 and 12 projecting to the opposite side of the molding surfaces 1a and 2a are formed, respectively.
Support concave portions 11a and 12a are provided at the root portions of the lower surfaces of the reference numerals 1 and 12, respectively. Each of the support recesses 11a and 12a has a support tip 14 which is branched into two parts of the die support base 13.
Is inserted into the mold 1, with the support tip 14 serving as a fulcrum.
2 is rotatably supported.
【００１７】型支持台１３の下端には上下動アクチュエ
ータ３が接続されており、型支持台１３を一対の成形型
１，２と共に上下動できるようになっている。前記一対
の成形型１，２の上方にはベース型５が固設されてい
る。ベース型５の下端外側には成形型１，２の突出部１
１，１２に対向して鍔部１５が設けられている。A vertical movement actuator 3 is connected to the lower end of the die support base 13 so that the die support base 13 can be moved up and down together with the pair of molding dies 1 and 2. A base die 5 is fixedly installed above the pair of molding dies 1 and 2. On the outside of the lower end of the base mold 5, the protrusions 1 of the molds 1 and 2
A flange portion 15 is provided so as to face the terminals 1 and 12.
【００１８】前記成形型１と成形型２及び一対の成形型
１，２とベース型５の間には隙間が設定できるように構
成され、この隙間を設けた状態で一対の成形型１，２及
びベース型５とにより形成される空間にガラスゴブ６が
供給されるようになっている。このとき、ガラスゴブ６
は前記隣り合う一対の成形型１，２の成形面１ａ，２ａ
上に載置され、成形型１，２は成形面１ａ，２ａ側に傾
いた状態で型支持台１３により支持されている。A gap can be set between the molding die 1 and the molding die 2 and between the pair of molding dies 1 and 2 and the base die 5, and the pair of molding dies 1 and 2 is provided with the clearance. The glass gob 6 is supplied to the space formed by the base mold 5. At this time, the glass gob 6
Is the molding surfaces 1a, 2a of the pair of adjacent molding dies 1, 2.
The molds 1 and 2 placed on the top are supported by a mold support 13 in a state of being inclined toward the molding surfaces 1a and 2a.
【００１９】つぎに、上記構成からなる光学素子成形型
の作用を説明する。まず、図５（Ａ）に示すように、ガ
ラスゴブ６を成形面１ａ，２ａ上に載置する。そして、
図５（Ｂ）に示すように、成形面１ａ，２ａ側に傾いた
状態で型支持台１３に支持されている一対の成形型を、
その傾いた状態で型支持台１３によって支持したまま上
下動アクチュエータ３により型支持台１３を介して上昇
し、成形型１，２の突出部１１，１２の上面先端とベー
ス型５の鍔部１５下面に当接させて第１の成形を行な
い、成形品形状７に成形する。Next, the operation of the optical element molding die having the above construction will be described. First, as shown in FIG. 5A, the glass gob 6 is placed on the molding surfaces 1a and 2a. And
As shown in FIG. 5 (B), a pair of molding dies supported by the mold support 13 in a state of being inclined toward the molding surfaces 1a and 2a are
While being supported by the mold support base 13 in the tilted state, the vertical movement actuator 3 raises the mold via the mold support base 13, and the top ends of the protrusions 11 and 12 of the molding dies 1 and 2 and the flange 15 of the base mold 5. The first molding is carried out by bringing it into contact with the lower surface to mold the molded product shape 7.
【００２０】この第１の成形により成形品の大まかな形
状は成形されるが、有効面の稜部成形部分へのゴブの侵
入が不完全となり先端が曲率状となる。つぎに、第２の
成形によってこの先端形状を改善する。Although the rough shape of the molded product is molded by this first molding, the invasion of the gob into the ridge molding portion of the effective surface is incomplete and the tip has a curved shape. Next, this tip shape is improved by the second molding.
【００２１】第２の成形は、図５（Ｃ）に示すように、
上下動アクチュエータ３によって、更に一対の成形型
１，２を上方に押し込むことにより成形型の突出部１
１，１２をベース型５の鍔部１５に押し当て、支持凹部
１１ａ，１２ａを中心に回転させて突出部１１，１２の
上面と鍔部１５の下面を密着し、成形型１と成形型２と
型ベース５を各々密着して行なう。In the second molding, as shown in FIG. 5 (C),
The vertical movement actuator 3 further pushes the pair of molding dies 1 and 2 upward to project the projection 1 of the molding dies.
1, 12 are pressed against the flange portion 15 of the base die 5 and are rotated about the support recesses 11a, 12a to bring the upper surfaces of the protruding portions 11, 12 and the lower surface of the collar portion 15 into close contact with each other, thereby forming the forming die 1 and the forming die 2 And the mold base 5 are closely attached to each other.
【００２２】この第２の成形により、成形品形状７のガ
ラスは圧縮されて内圧が高まり成形型１，２の有効面の
稜部成形部分に入り込んでいき、前記稜部の曲率状がつ
ぶされ鋭利な曲率の小さい稜線が成形される。また、ベ
ース型５と成形型１、ベース型５と成形型２、ベース型
６の有効面の稜部成形部分においてもガラスを挟み込む
成形となるため、この部分の稜部も鋭利な曲率に成形さ
れる。このように、第２の成形により再圧縮となるた
め、ゴブの曲率状が押しつぶされて稜部曲率が改善され
た鋭利な曲率の小さい稜部をもつ成形品８が成形され
る。その他の稜部においても稜部曲率が改善された。By this second molding, the glass having the shape of the molded product 7 is compressed and the internal pressure is increased to enter the ridge forming portion of the effective surface of the molding dies 1 and 2, and the curvature of the ridge is collapsed. A ridgeline with a small sharp curvature is formed. Further, since the glass is sandwiched in the ridge forming portion of the effective surface of the base die 5 and the forming die 1, the base die 5 and the forming die 2, and the base die 6, the ridge of this portion is also formed to have a sharp curvature. To be done. In this way, since the second molding causes recompression, the curvature of the gob is crushed, and the molded product 8 having a sharp ridge with a small curvature is improved. The curvature of the ridge was also improved in the other ridges.
【００２３】本実施例によれば、上下動アクチュエータ
３の作動のみによって、一対の成形型１，２の上下動及
び挟持動の２つの動作を行なうことができるので装置と
制御を簡単にすることができる。According to this embodiment, the vertical movement and the clamping movement of the pair of molding dies 1 and 2 can be performed only by the operation of the vertical movement actuator 3, so that the apparatus and the control can be simplified. You can
【００２４】[0024]
【実施例３】図６は本発明の実施例３を示し、図６
（Ａ）はガラスゴブを供給した状態を示す断面図、図６
（Ｂ）は第１の成形状態を示す断面図、図６（Ｃ）は第
２の成形状態を示す断面図である。一対の成形型１，２
は当接かつ離反可能に型支持台１３内で対向して配置さ
れている。成形型１と成形型２には、成形品の隣り合う
有効面を成形する成形面１ａ，２ａが所定角度をもって
対向するように設けられている。また、一対の成形型
１，２の上端には、成形面１ａ，２ａと反対側に突出さ
せた突出部１１，１２が各々形成され、各突出部１１，
１２の先端は曲面状に形成されている。[Third Embodiment] FIG. 6 shows a third embodiment of the present invention.
FIG. 6A is a cross-sectional view showing a state where a glass gob is supplied, FIG.
6B is a cross-sectional view showing the first molding state, and FIG. 6C is a cross-sectional view showing the second molding state. A pair of molds 1 and 2
Are arranged opposite to each other in the mold support 13 so as to be able to come into contact with and separate from each other. The molding dies 1 and 2 are provided so that molding surfaces 1a and 2a for molding adjacent effective surfaces of a molded product face each other at a predetermined angle. Further, at the upper ends of the pair of molding dies 1 and 2, projecting portions 11 and 12 projecting to the opposite side to the molding surfaces 1a and 2a are formed, respectively.
The tip of 12 is formed in a curved surface.
【００２５】型支持台１３は断面コ字状に形成されてお
り、一対の成形型１，２は、前記突出部１１，１２の先
端を型支持台１３の内側面と当接させた状態で、かつ前
記突出部１１，１２の下方において型支持台１３内に配
置したバネ１６により突出部１１，１２を持ち上げて成
形面１ａ，２ａ側に傾けた状態で型支持台１３内に収納
されている。すなわち、一対の成形型１，２は型支持台
１３より外方向への移動が拘束されるとともに、突出部
１１，１２の先端と型支持台１３との当接部を支点に回
転可能で、かつ成形型１，２との間に隙間を有するよう
に支持されている。The mold supporting base 13 is formed in a U-shaped cross section, and the pair of molding dies 1 and 2 are in a state in which the tips of the projecting portions 11 and 12 are brought into contact with the inner surface of the mold supporting base 13. Further, the protrusions 11 and 12 are lifted up by a spring 16 arranged in the mold support base 13 below the protrusions 11 and 12 and stored in the mold support base 13 in a state of being inclined toward the molding surfaces 1a and 2a. There is. That is, the pair of molding dies 1 and 2 are restrained from moving outward from the die support base 13, and are rotatable around the contact portions between the tips of the protrusions 11 and 12 and the die support base 13, as fulcrums. Further, it is supported so as to have a gap between the molds 1 and 2.
【００２６】型支持台１３の下部には上下動アクチュエ
ータ３が接続されており、型支持台１３を一対の成形型
１，２と共に上下動できるようになっている。前記一対
の成形型１，２の上方にはベース型５が固設されてい
る。ベース型５の下端外側には成形型１，２の突出部１
１，１２に対向して鍔部１５が設けられている ガラス
ゴブ６は一対の成形型１，２の成形面１ａ，２ａ上に載
置され、その上方にはベース型５の成形面５ａの設けら
れている。A vertical movement actuator 3 is connected to the lower portion of the die support 13 so that the die support 13 can be moved up and down together with the pair of molding dies 1 and 2. A base die 5 is fixedly installed above the pair of molding dies 1 and 2. On the outside of the lower end of the base mold 5, the protrusions 1 of the molds 1 and 2
The glass gob 6 provided with the flange portion 15 facing to the molds 1 and 12 is placed on the molding surfaces 1a and 2a of the pair of molding dies 1 and 2, and the molding surface 5a of the base mold 5 is provided above it. Has been.
【００２７】つぎに、上記構成からなる光学素子成形型
の作用を説明する。まず、図６（Ａ）のようにガラスゴ
ブ６を供給した後、図６（Ｂ）に示すように第１の成形
を行なう。第１の成形は、一対の成形型１，２をバネ１
６により有効面側に傾けた状態のまま型支持台１３とと
もに、型支持台１３の下部に接続した上下動アクチュエ
ータ３の作動により上昇させ、上部に固定したベース型
５の鍔部１５下面に成形型１，２の突出部１１，１２上
面の先端を当接させて行なう。Next, the operation of the optical element molding die having the above structure will be described. First, after supplying the glass gob 6 as shown in FIG. 6A, the first molding is performed as shown in FIG. 6B. In the first molding, the pair of molding dies 1 and 2 is attached to the spring 1.
6 is lifted by the operation of the vertical movement actuator 3 connected to the lower part of the mold support 13 together with the mold support 13 while being tilted to the effective surface side, and is molded on the lower surface of the collar portion 15 of the base mold 5 fixed to the upper part. This is performed by bringing the tips of the upper surfaces of the protrusions 11 and 12 of the molds 1 and 2 into contact with each other.
【００２８】このときバネ１６は縮むことなく成形型
１，２は傾いたままであり、ガラスゴブ６は概ね成形品
と近似する成形形状７に成形されている。しかし、各型
１，２、５の有効面成形部分の稜部には入り込めず内圧
も上がらず曲率状の稜部となっている。つぎに、第２の
成形によりこの稜部成形性を改善する。At this time, the spring 16 does not contract and the molds 1 and 2 remain inclined, and the glass gob 6 is molded into a molded shape 7 which is approximately similar to a molded product. However, it cannot enter into the ridge portion of the effective surface forming portion of each mold 1, 2 and 5, and the internal pressure does not rise, and the ridge portion has a curved shape. Next, the ridge part formability is improved by the second forming.
【００２９】第２の成形では、更に上下動アクチュエー
タ３を作動して一対の成形型１，２を上方に押し込むこ
とにより、ベース型５の鍔部１５に当接している成形型
１，２の突出部１１，１２を更に型支持台１３内に押し
込みバネ１６を縮ませる。このとき、成形型１，２の突
出部１１，１２と型支持台１３の内側面が当接している
ため、成形型１，２は型支持台によって外向への移動が
拘束され、突出部１１，１２と型支持台１３との当接部
を中心に成形型１，２が回転し、成形型１と成形型２が
密着するとともに成形型１，２の突出部１１，１２上面
全体がベース型５の鍔部１５下面に密着する。In the second molding, the vertical movement actuator 3 is further actuated to push the pair of molding dies 1 and 2 upward, so that the molding dies 1 and 2 in contact with the flange portion 15 of the base mold 5 are moved. The protrusions 11 and 12 are further pushed into the mold support 13 to contract the spring 16. At this time, since the projecting portions 11 and 12 of the molding dies 1 and 2 are in contact with the inner side surface of the mold supporting base 13, the molding dies 1 and 2 are restrained from moving outward by the mold supporting base, and the projecting portions 11 and 12 are restrained. , 12 and the mold support 13 are rotated about the contact portions between the molds 1 and 12, the molds 1 and 2 are brought into close contact with each other, and the entire upper surfaces of the protrusions 11 and 12 of the molds 1 and 2 are bases. It comes into close contact with the lower surface of the collar portion 15 of the mold 5.
【００３０】この第２の成形の際に、バネ１６を縮ませ
て成形型１，２の傾きが修正されるに伴い各成形面１
ａ，２ａ，５ａの稜部成形部分にあった各型１，２，５
の隙間がガラスを挟み込むように接近し内圧が高められ
ながら成形が進行するために、前記稜部の曲率状が挟ま
れつつ押しつぶされ鋭利な曲率に成形される。At the time of this second molding, as the spring 16 is contracted to correct the inclination of the molding dies 1 and 2, each molding surface 1
a, 2a, 5a, which were in the ridge forming portion of 1, 2a, 5a
Since the gaps approach each other so as to sandwich the glass and the molding progresses while the internal pressure is increased, the curvature of the ridge is crushed while being clamped to form a sharp curvature.
【００３１】本実施例によれば、前記実施例２と同様に
上下動アクチュエータ３単独での第１、第２の成形を実
現することができる。また、型支持台１３の内部に成形
型１，２の突出部１１，１２を拘束して成形を進行でき
るので各型の位置精度を良好にできる。According to this embodiment, similar to the second embodiment, it is possible to realize the first and second moldings by the vertical movement actuator 3 alone. Further, since the protrusions 11 and 12 of the molding dies 1 and 2 can be constrained inside the mold support 13 to proceed with the molding, the positional accuracy of each mold can be improved.
【００３２】[0032]
【実施例４】図７は本発明の実施例４を示し、図４
（Ａ）はガラスゴブを供給した状態を示す断面図、図７
（Ｂ）は第１の成形状態を示す断面図、図７（Ｃ）は第
２の成形状態を示す断面図である。型支持台１３の上面
は中心方向に傾斜した面１７，１８を左右に有し、その
斜面１７，１８上に前記一対の成形型１，２が各々摺動
可能に載置されている。また、型支持台１３の下面には
上下動アクチュエータ３が接続されている。[Fourth Embodiment] FIG. 7 shows a fourth embodiment of the present invention.
7A is a cross-sectional view showing a state where the glass gob is supplied, FIG.
FIG. 7B is a sectional view showing the first molding state, and FIG. 7C is a sectional view showing the second molding state. The upper surface of the mold support 13 has left and right surfaces 17 and 18 inclined toward the center, and the pair of molding dies 1 and 2 are slidably mounted on the inclined surfaces 17 and 18, respectively. The vertical movement actuator 3 is connected to the lower surface of the die support 13.
【００３３】一対の成形型１，２は当接かつ離反可能に
型支持台１３上で対向して共に載置されている。成形型
１と成形型２には、成形品の隣り合う有効面を成形する
成形面１ａ，２ａが所定角度をもって対向するように設
けられている。一対の成形型１，２は当接かつ離反可能
に型支持台１３上で対向して共に載置されている。成形
型１，２の下面は型支持台の傾斜に合わせた傾きを持っ
て形成されている。また、成形型１，２の対向する側面
には各々ザグリ１９ａ，１９ｂが設けてあり、このザグ
リ１９ａ，１９ｂ内には、ガラスゴブ６の供給時及び第
１の成形時に成形型１，２の隙間を確保するためのバネ
２１をが挿入配置されている。さらに、一対の成形型
１，２の上方にはベース型５が固定されており、ベース
型５と一対の成形型１，２とのなす空間にガラスゴブが
供給されるようになっている。The pair of molding dies 1 and 2 are placed on the mold support 13 so as to be in contact with each other and to be separated from each other so as to face each other. The molding dies 1 and 2 are provided so that molding surfaces 1a and 2a for molding adjacent effective surfaces of a molded product face each other at a predetermined angle. The pair of molding dies 1 and 2 are placed on the mold support 13 so as to be in contact with each other and separated from each other so as to face each other. The lower surfaces of the molding dies 1 and 2 are formed with an inclination that matches the inclination of the die support. Further, counterbores 19a and 19b are provided on the opposite side surfaces of the molding dies 1 and 2, respectively, and in the counterbores 19a and 19b, a gap between the molding dies 1 and 2 is supplied when the glass gob 6 is supplied and during the first molding. A spring 21 for ensuring the above is inserted and arranged. Further, a base mold 5 is fixed above the pair of molding dies 1 and 2, and a glass gob is supplied to a space formed by the base mold 5 and the pair of molding dies 1 and 2.
【００３４】つぎに、上記構成からなる光学素子成形型
の作用を説明する。まず、図７（Ａ）のようにガラスゴ
ブ６を供給し、図４（Ｂ）に示すように、上下動アクチ
ュエータ３を作動させて型支持台１３を上昇させるとと
もに一対の成形型１、２を上昇させて第１の成形を行な
う。この第１の成形によりおおまか成形品の形状７が成
形されるが、この時点ではベース型５、成形型１、成形
型２の各々はまだ相互に当接しておらず、成形品の有効
面の稜部は丸く曲率状を成している。つぎに、第２の成
形によって上記稜部の曲率状を改善する。Next, the operation of the optical element molding die having the above construction will be described. First, as shown in FIG. 7 (A), the glass gob 6 is supplied, and as shown in FIG. 4 (B), the vertical movement actuator 3 is actuated to raise the die support 13 and the pair of molding dies 1 and 2 are moved. The first molding is carried out by raising. The shape 7 of the rough molded product is molded by this first molding, but at this time, the base mold 5, the molding mold 1, and the molding mold 2 are not in contact with each other yet, and the effective surface of the molded product is The ridge has a rounded curvature. Next, the curvature of the ridge portion is improved by the second molding.
【００３５】第２の成形は、図７（Ｃ）に示すように、
上下動アクチュエータ３を作動して一対の成形型１、２
を更に上昇させることによって成形型１，２をベース型
５の下面に当接させることにより行なう。この第２の成
形の時、ベース型５と成形型１，２との稜部の成形が挟
むように行なわれ鋭利な稜部が形成される。引き続き上
下動アクチュエータ３により成形型１，２を上昇して押
し込むことにより、成形型１，２間に設けられたバネ２
０によって型支持台１３の斜面１７，１８の上方に押し
上げられていた成形型１，２は斜面１７，１８に沿って
下がりはじめバネ２０が縮んで成形型１，２が当接す
る。In the second molding, as shown in FIG. 7 (C),
By operating the vertical movement actuator 3, a pair of molding dies 1, 2
Is further raised to bring the molding dies 1 and 2 into contact with the lower surface of the base mold 5. At the time of this second molding, the ridge portions of the base die 5 and the molding dies 1 and 2 are formed so as to be sandwiched, and sharp edge portions are formed. Subsequently, the vertical movement actuator 3 raises and pushes the molding dies 1 and 2 to press the springs 2 provided between the molding dies 1 and 2.
The molds 1 and 2 pushed up above the slopes 17 and 18 of the mold support 13 by 0 start to fall along the slopes 17 and 18, and the spring 20 contracts and the molds 1 and 2 come into contact with each other.
【００３６】これにより成形型１と成形型２の稜部にお
ける成形品８の曲率状が挟み込み成形され、成形品８の
稜部が鋭く成形される。また第２の成形によって内部の
体積が減少し内部圧力が高まるのでその他の稜部の曲率
も改善される。As a result, the curvature of the molded product 8 at the ridges of the molding dies 1 and 2 is sandwiched and molded, and the ridges of the molded product 8 are sharply molded. Further, since the second molding reduces the internal volume and increases the internal pressure, the curvature of other ridges is also improved.
【００３７】本実施例によれば、成形型１，２、ベース
型５に突出部１１，１２、鍔部１５を形成しないためコ
ンパクトにでき、また１本の上下動アクチュエータ３で
上下・左右の成形を実現できるというメリットがある。According to the present embodiment, since the molding dies 1 and 2 and the base die 5 do not have the protrusions 11 and 12 and the flange 15 formed therein, the size can be reduced, and one vertical movement actuator 3 can be used to move the vertical and horizontal directions. There is an advantage that molding can be realized.
【００３８】[0038]
【発明の効果】以上のように、本発明の光学素子成形型
によれば、ガラス素材を左右に分割された型部材と上型
とにより圧縮せしめた後あるいは前記圧縮（第１の成
形）と同時に左右から前記型部材を左右方向に移動して
圧縮したガラス素材を再加圧（第２の成形）できる。す
なわち、ガラス素材をただ押し込んだり内圧を高めるだ
けの従来の成形とは異なり、第１の成形により一旦成形
して丸く成形された成形品の有効面の稜部を、その後更
に型で挟み込んで成形（第２の成形）するため、従来同
様内圧が高められる良好な条件を維持しつつ成形型によ
る挟み込みで稜部の丸い曲率状をつぶして鋭利な曲率の
小さな稜部成形を実現できる。また、従来の成形のよう
に、再加圧時に成形面に接合線を発生させる成形型以外
の部材を必要としないので、成形品に接合線が生ぜず良
好な光学性能を有する光学素子を製造することができ
る。As described above, according to the optical element molding die of the present invention, the glass material is compressed by the left and right divided mold members and the upper mold, or after the compression (first molding). At the same time, the mold member can be moved in the left-right direction from the left and right, and the compressed glass material can be re-pressed (second molding). That is, unlike the conventional molding in which the glass material is simply pushed in or the internal pressure is increased, the ridge of the effective surface of the molded product that was once molded and rounded by the first molding is then further sandwiched by a mold. Because of the (second molding), it is possible to realize the molding of the ridge portion having a small sharp curvature by squeezing the round curvature of the ridge portion by sandwiching it by the molding die while maintaining the favorable condition of increasing the internal pressure as in the conventional case. Further, unlike conventional molding, no member other than a molding die that generates a bonding line on the molding surface at the time of re-pressing is required, so a bonding line does not occur in a molded product and an optical element having good optical performance is manufactured. can do.
【図１】本発明の光学素子成形型を概念的に示す断面図
である。FIG. 1 is a sectional view conceptually showing an optical element molding die of the present invention.
【図２】本発明の光学素子成形型による第１の成形状態
を示す断面図である。FIG. 2 is a cross-sectional view showing a first molding state by the optical element molding die of the present invention.
【図３】本発明の光学素子成形型による第の成形状態を
示す断面図である。FIG. 3 is a cross-sectional view showing a first molding state by the optical element molding die of the present invention.
【図４】本発明の実施例１を示す断面図である。FIG. 4 is a cross-sectional view showing a first embodiment of the present invention.
【図５】本発明の実施例２を示す断面図である。FIG. 5 is a cross-sectional view showing a second embodiment of the present invention.
【図６】本発明の実施例３を示す断面図である。FIG. 6 is a sectional view showing a third embodiment of the present invention.
【図７】本発明の実施例４を示す断面図である。FIG. 7 is a cross-sectional view showing a fourth embodiment of the present invention.
【図８】従来技術の成形型を示す断面図である。FIG. 8 is a sectional view showing a conventional molding die.
１，２ 成形型 ３ 上下動アクチュエータ ４ａ，４ｂ 挟持アクチュエータ ５ ベース型 ６ ガラスゴブ 1, 2 Molds 3 Vertical actuators 4a, 4b Clamping actuator 5 Base type 6 Glass gob
Claims (1)
持成形する光学素子の成形型であって、左右に分割され
た型部材と、この型部材の成形面上に載置したガラス素
材を型部材及び該型部材に対向配置した上型とにより圧
縮せしめる型の上下動機構と、前記圧縮の後あるいは前
記圧縮と同時に左右から前記型部材を左右方向に開閉動
せしめる開閉機構を備えたことを特徴とする光学素子成
形型。1. A molding die for an optical element for nipping and molding a heat-softened glass material into a predetermined shape, which comprises a mold member divided into right and left and a glass material placed on the molding surface of the mold member. A vertical movement mechanism of a mold that is compressed by a member and an upper mold that faces the mold member; and an opening and closing mechanism that opens and closes the mold member in the left and right directions from the left and right after or simultaneously with the compression. Characteristic optical element molding die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28750693A JP3465937B2 (en) | 1993-10-22 | 1993-10-22 | Optical element mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28750693A JP3465937B2 (en) | 1993-10-22 | 1993-10-22 | Optical element mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07118026A true JPH07118026A (en) | 1995-05-09 |
| JP3465937B2 JP3465937B2 (en) | 2003-11-10 |
Family
ID=17718225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28750693A Expired - Fee Related JP3465937B2 (en) | 1993-10-22 | 1993-10-22 | Optical element mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3465937B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020011923A (en) * | 2000-08-04 | 2002-02-09 | 모리시타 요이찌 | Apparatus for molding precision element, and method for molding the same |
| JP2009078973A (en) * | 2009-01-19 | 2009-04-16 | Covalent Materials Corp | Mold for hot press and method of producing silica glass using the same |
-
1993
- 1993-10-22 JP JP28750693A patent/JP3465937B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020011923A (en) * | 2000-08-04 | 2002-02-09 | 모리시타 요이찌 | Apparatus for molding precision element, and method for molding the same |
| JP2009078973A (en) * | 2009-01-19 | 2009-04-16 | Covalent Materials Corp | Mold for hot press and method of producing silica glass using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3465937B2 (en) | 2003-11-10 |
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