JPH05286732A - Method and device for forming optical element - Google Patents
Method and device for forming optical elementInfo
- Publication number
- JPH05286732A JPH05286732A JP8883692A JP8883692A JPH05286732A JP H05286732 A JPH05286732 A JP H05286732A JP 8883692 A JP8883692 A JP 8883692A JP 8883692 A JP8883692 A JP 8883692A JP H05286732 A JPH05286732 A JP H05286732A
- Authority
- JP
- Japan
- Prior art keywords
- molding
- optical element
- spring
- die
- 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.)
- 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
- C03B2215/50—Structural details of the press-mould assembly
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/72—Barrel presses or equivalent, e.g. of the ring mould type
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)
Abstract
Description
【０００１】[0001]
【利用分野】本発明は、レンズ、プリズム等の光学素子
を押圧成形によって成形する成形装置及び成形方法に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus and a molding method for molding optical elements such as lenses and prisms by press molding.
【０００２】[0002]
【従来技術及びその問題点】光学素子を製造する方法と
しては、従来、種々の材料から成る成形型に光学素子の
設計に応じた有効成形面を形成し、光学素子材料を加熱
軟化させ、上型と下型から成る一対の成形型と胴型の間
で押圧し、有効成形面に応じた所定の形状に成形する押
圧成形法が知られている。しかしながら、この方法で
は、下型上に光学素子材料を載せ、その上に上型及びさ
らにはシリンダーを載せた状態で光学素子材料の加熱を
開始するので、光学素子材料がまだ硬い状態のときに上
型及びシリンダーの荷重によって上型及び下型の成形面
に傷が付くことがあった。2. Description of the Related Art Conventionally, as a method for manufacturing an optical element, an effective molding surface corresponding to the design of the optical element is formed on a molding die made of various materials, and the optical element material is heated and softened. A press molding method is known in which a pair of molding dies including a mold and a lower mold and a body mold are pressed to form a predetermined shape corresponding to an effective molding surface. However, in this method, the optical element material is placed on the lower mold, and the heating of the optical element material is started in a state where the upper die and further the cylinder are placed on the lower die, so that when the optical element material is still in a hard state. The molding surfaces of the upper mold and the lower mold were sometimes scratched by the load of the upper mold and the cylinder.
【０００３】また、成形型の加熱については、シリンダ
ー内に内蔵したヒーターで加熱する方式、シリンダーの
先に押圧板又は押圧棒を取り付け、その押圧板又は押圧
棒にヒーターを取り付けて加熱する方式及び成形型の側
面から加熱する方式が知られている。しかしながら、シ
リンダー内蔵ヒーターで加熱する方式では、下型にはヒ
ーターの熱が直接伝わるが、上型はシリンダーと離れて
いるため間接的にしか熱が伝わらないので、上下の型の
温度が等しくならず、また、側面から加熱する方式で
は、下型と接しているシリンダーから伝熱により熱が逃
げるため、やはり上下の型の温度を等しくすることが困
難であり、成形品への悪影響を回避するためには昇温速
度や降温速度を低く抑えざるを得なかった。Regarding the heating of the molding die, a method of heating with a heater built into the cylinder, a method of attaching a pressing plate or a pressing rod to the tip of the cylinder and attaching a heater to the pressing plate or the pressing rod, and heating A method of heating from the side of the mold is known. However, in the method of heating with the heater with built-in cylinder, the heat of the heater is directly transmitted to the lower mold, but since the upper mold is separated from the cylinder, the heat is indirectly transmitted, so if the temperature of the upper and lower molds is equal. In addition, in the method of heating from the side, since heat escapes from the cylinder in contact with the lower mold by heat transfer, it is still difficult to make the temperatures of the upper and lower molds equal, and avoid adverse effects on the molded product. In order to do so, the temperature raising rate and the temperature lowering rate had to be kept low.
【０００４】[0004]
【発明の目的】本発明は、成形型の有効成形面に傷を付
けることなく、成形型、ひいては光学素子材料を均等に
加熱あるいは冷却しうる光学素子の成形装置及び成形方
法を提供することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical element molding apparatus and a molding method capable of uniformly heating or cooling a molding die and thus an optical element material without damaging the effective molding surface of the molding die. To aim.
【０００５】[0005]
【発明の構成】本発明は、胴型の片方の端面に穴又は溝
を設け、この穴又は溝内にスプリングを設置し、このス
プリングによって上型の荷重を支持させることによって
上記目的を達成したものである。The present invention has achieved the above object by providing a hole or groove in one end surface of a barrel mold, installing a spring in the hole or groove, and supporting the load of the upper mold by the spring. It is a thing.
【０００６】すなわち、本発明による光学素子の成形装
置は、光学素子材料を加熱軟化させて上型、下型及び胴
型の間で押圧成形することにより光学素子を成形する成
形装置において、胴型の上型を支持する側の端面に１個
以上の穴又は溝を設け、該穴又は溝内に上型を上方に付
勢するスプリングを設置したことを特徴とする。That is, an optical element molding apparatus according to the present invention is a molding apparatus for molding an optical element by heating and softening an optical element material and press-molding it between an upper die, a lower die and a barrel die. One or more holes or grooves are provided in the end surface on the side supporting the upper mold, and a spring for urging the upper mold upward is installed in the hole or groove.
【０００７】さらに、本発明による光学素子の成形方法
は、上記成形装置の下型上に光学素子材料を載せ、上型
の重量をスプリングで支えた状態でセットし、光学素子
材料を加熱軟化させ、上型をスプリングを縮めながら押
圧して押圧成形することを特徴とする。Further, in the method for molding an optical element according to the present invention, the optical element material is placed on the lower die of the above-mentioned molding apparatus, and the weight of the upper die is set while being supported by a spring to heat and soften the optical element material. The upper mold is pressed by pressing the spring while the spring is being compressed.
【０００８】次に、本発明による光学素子の成形装置に
ついて説明する。上型及び下型の素材及び構造について
は、特に制限はなく、従来公知の任意の素材及び構造で
あってよく、例えば、母材の成形面の表面が種々のセラ
ミックスや、金、白金、白金族金属を始めとする貴金属
の薄膜で被覆されたもの、特開平３−２３７０２４号公
報に記載されているようなものなどが好適である。Next, an optical element molding apparatus according to the present invention will be described. The material and structure of the upper mold and the lower mold are not particularly limited and may be any conventionally known material and structure. For example, the surface of the molding surface of the base material is various ceramics, gold, platinum, platinum. Those coated with a thin film of a noble metal such as a group metal and those described in JP-A-3-237024 are suitable.
【０００９】また、胴型は、上型及び下型と同一の素材
から成るのが好ましいが、他の素材から構成されていて
もよい。本発明の成形装置においては、胴型の片方の端
面には穴又は溝が１個以上設けられ、該穴又は溝内に上
型を上方に付勢するスプリングが設置される。ここで、
穴又は溝の深さは、支持すべき上型の重量、用いるスプ
リングのばね力及び高さと相関して決定される。すなわ
ち、スプリングは（設置された数で）上型の重量を支持
でき、押圧成形時には穴又は溝内に完全に収まるばね力
及び高さを有するものを用いる。そのため、穴又は溝の
深さは、スプリングの密着高さ以上の深さとし、スプリ
ングの自由高さより浅くする。また、穴又は溝の深さ
を、押圧成形時にはスプリングの全長を収容できるよう
に決定することにより、成形品の肉厚の精密な制御を図
ることができる。Further, the barrel die is preferably made of the same material as the upper die and the lower die, but may be made of other materials. In the molding apparatus of the present invention, one or more holes or grooves are provided on one end surface of the barrel mold, and a spring for urging the upper mold upward is installed in the hole or groove. here,
The depth of the hole or groove is determined in correlation with the weight of the upper die to be supported, the spring force of the spring used, and the height. That is, the spring has a spring force and a height capable of supporting the weight of the upper mold (in the installed number) and being completely contained in the hole or groove during the press molding. Therefore, the depth of the hole or groove is set to be equal to or greater than the contact height of the spring and is shallower than the free height of the spring. Further, by determining the depth of the hole or groove so that the entire length of the spring can be accommodated at the time of press molding, it is possible to precisely control the wall thickness of the molded product.
【００１０】上記のように胴型の端面に設けた穴又は溝
にスプリングを設置して上型の重量を支持できるように
構成されているため、本発明の成形装置を用いて光学素
子を成形するに当たり、光学素子材料を下型上に載せ、
上型の重量をスプリングで支えた状態（上型は光学素子
材料に接触しないか、又は接触してもその荷重がかから
ない状態）でセットし、上型の重量が光学素子材料、さ
らには下型にまで及ばない状態で光学素子材料を加熱軟
化させることができる。このとき、シリンダー先端の押
圧面を上型裏面に接触させておき、均一な加熱を確保す
ることができる。光学素子材料が軟化したら押圧成形工
程を行う。その際にシリンダーの押圧によりスプリング
を縮めながら上型を降下させて押出成形を行うが、最終
的にスプリングが完全に穴又は溝中に収まるようにす
る。As described above, since the spring is installed in the hole or groove provided on the end face of the barrel mold to support the weight of the upper mold, the optical element is molded using the molding apparatus of the present invention. In doing so, put the optical element material on the lower mold,
Set with the weight of the upper die supported by a spring (the upper die does not come into contact with the optical element material or the load is not applied even if it comes into contact), and the weight of the upper die is the optical element material, and further the lower die. It is possible to heat and soften the optical element material in a state not reaching the above. At this time, the pressing surface at the tip of the cylinder can be kept in contact with the back surface of the upper mold to ensure uniform heating. When the optical element material softens, a press molding process is performed. At that time, the upper mold is lowered while the spring is contracted by pressing the cylinder to perform extrusion molding, and finally the spring is completely set in the hole or groove.
【００１１】次に、図面を参照して本発明をさらに詳細
に説明する。図１は、本発明による成形装置の成形部を
光学素子材料の成形前の状態で示す説明図である。図１
において、上型１及び下型２の母材の有効成形面には、
薄膜３が被着されている。４は胴型であり、５は成形品
の肉厚調整部材である。上型１及び下型２の母材の有効
成形面は、超精密旋盤等の工作機械を用いて削った後、
ダイヤモンドペースト研磨材等を用いて表面粗さＲmax
が0.０２μｍ以下になるまで研磨され、次いで、スパッ
タリング法、イオンプレーティング法、化学的気相成長
（ＣＶＤ）法など、任意の方法で成形型の有効成形面と
表面形状が実質的に同一の薄膜３を被着することができ
る。The present invention will now be described in more detail with reference to the drawings. FIG. 1 is an explanatory view showing a molding section of a molding apparatus according to the present invention in a state before molding an optical element material. Figure 1
In, in the effective forming surface of the base material of the upper mold 1 and the lower mold 2,
A thin film 3 is applied. Reference numeral 4 is a barrel type, and 5 is a wall thickness adjusting member for a molded product. After the effective forming surface of the base material of the upper mold 1 and the lower mold 2 is ground using a machine tool such as an ultra-precision lathe,
Surface roughness R max using diamond paste abrasive
Is polished to 0.02 μm or less, then the surface shape is substantially the same as the effective molding surface of the molding die by any method such as sputtering, ion plating, and chemical vapor deposition (CVD). Thin film 3 can be applied.
【００１２】本発明の成形装置においては、胴型４の端
面に穴１１が設けられ、この穴１１の中に上方、すなわ
ち胴型から離れる方向に付勢するスプリング１２が設置
されている。穴１１の深さは、支持すべき上型１の重
量、用いるスプリング１２のばね力及び高さと相関して
決定され、スプリングの密着高さ以上の深さとし、スプ
リングの自由高さより浅くし、押圧成形時にはスプリン
グの全長を収容できるように決定する。穴１１の数は、
上型１の重量、用いるスプリング１２のばね力などを考
慮して決定することができるが、安定性などを考慮して
胴型４に等間隔で設けるべきである。In the molding apparatus of the present invention, a hole 11 is provided in the end face of the barrel die 4, and a spring 12 for urging upward, that is, in a direction away from the barrel die, is provided in the hole 11. The depth of the hole 11 is determined in correlation with the weight of the upper mold 1 to be supported, the spring force and the height of the spring 12 to be used, and the depth is not less than the contact height of the spring, is shallower than the free height of the spring, and is pressed. At the time of molding, it is determined so that the entire length of the spring can be accommodated. The number of holes 11 is
It can be determined in consideration of the weight of the upper die 1, the spring force of the spring 12 used, etc., but should be provided at equal intervals in the body die 4 in consideration of stability and the like.
【００１３】上記の構成によりスプリング１２で上型１
が支持されているため、上型１の重量が光学素子材料
６、さらには下型２に及ぶことはない。下型２上に光学
素子材料６を載せただけであれば、低荷重であり、上型
１及び下型２上の薄膜３を傷つけることはない。また、
型表面を傷つけずにシリンダー８を上型１と接触させて
おくこともできる。With the above structure, the spring 12 forms the upper mold 1.
Is supported, the weight of the upper mold 1 does not reach the optical element material 6 and further the lower mold 2. If the optical element material 6 is simply placed on the lower mold 2, the load is low and the thin films 3 on the upper mold 1 and the lower mold 2 are not damaged. Also,
The cylinder 8 can be kept in contact with the upper mold 1 without damaging the mold surface.
【００１４】図２は、図１に示した成形装置で押圧成形
中の成形部の状態を示す説明図である。図１に示したよ
うに上型１及び下型２と胴型３との間に置かれた光学素
子材料６を、図２に示したように、ヒーター７によって
加熱軟化させる。加熱温度は、熱電対１０によって測定
される。高温時には、酸化による型部材の劣化を防ぐた
め雰囲気ガス供給口９から不活性ガス、例えば窒素ガス
を供給することができる。光学素子材料６が軟化した
ら、シリンダー８を降下させて所望の圧力でスプリング
１２を縮めながら押圧し、成形する。このとき、最終的
に穴１１内にスプリング１２が収容されるのが好まし
い。FIG. 2 is an explanatory view showing the state of the molding section during press molding by the molding apparatus shown in FIG. The optical element material 6 placed between the upper mold 1 and the lower mold 2 and the barrel mold 3 as shown in FIG. 1 is heated and softened by the heater 7 as shown in FIG. The heating temperature is measured by the thermocouple 10. At high temperature, an inert gas, for example, nitrogen gas can be supplied from the atmosphere gas supply port 9 in order to prevent deterioration of the mold member due to oxidation. When the optical element material 6 is softened, the cylinder 8 is lowered and the spring 12 is pressed with a desired pressure while being compressed to mold the spring 12. At this time, it is preferable that the spring 12 is finally housed in the hole 11.
【００１５】その後、徐冷し、成形部の温度が光学素子
材料６の転移点より低くなったときに圧力を除き、成形
品を取り出すことができる。こうして、同じ成形型を極
めて多数回繰り返し用いても、傷のない光学素子を製造
することができる。After that, the molded product can be taken out by slowly cooling it and removing the pressure when the temperature of the molded portion becomes lower than the transition point of the optical element material 6. In this way, it is possible to manufacture an optical element having no scratches even if the same mold is used very many times.
【００１６】図３は、本発明の別の実施態様を示す成形
装置の成形部を押圧成形中の状態で示す説明図であり、
図４は、図３のＡ−Ａ断面図（スプリングは省略した）
である。図３に示した装置は、シリンダー８内にヒータ
ー７を内蔵していること及び胴型４の端面に溝１３を設
け、その中に該溝１３の内径に相当する部分をスプリン
グの空芯部とする１個のスプリング１４を設置した点で
図１に示した成形装置と相違する。この実施態様におい
ても、同様に上型１の荷重が下型２の有効成形面を傷つ
けず、成形型の均等化が達成され、不良品を生ずること
なく、多数の光学素子を成形することができる。FIG. 3 is an explanatory view showing a molding section of a molding apparatus showing another embodiment of the present invention in a state during press molding.
FIG. 4 is a sectional view taken along line AA of FIG. 3 (springs are omitted).
Is. In the apparatus shown in FIG. 3, the heater 7 is built in the cylinder 8 and the groove 13 is provided on the end surface of the barrel die 4, and the portion corresponding to the inner diameter of the groove 13 is formed in the air core portion of the spring. Is different from the molding apparatus shown in FIG. 1 in that one spring 14 is installed. Also in this embodiment, similarly, the load of the upper mold 1 does not damage the effective molding surface of the lower mold 2, the molding dies are equalized, and a large number of optical elements can be molded without causing defective products. it can.
【００１７】さらに、本発明の成形装置において、上記
のいずれの実施態様においても、型に接触する部分、つ
まり上部シリンダーの先端や型設置台にヒーター板又は
冷却機能を備えた部材を取り付ければ、上、下型の均熱
化を達成できるばかりでなく、昇温又は降温速度を大幅
に向上させることができる。Further, in the molding apparatus of the present invention, in any of the above-mentioned embodiments, if a heater plate or a member having a cooling function is attached to a portion contacting the mold, that is, the tip of the upper cylinder or the mold installation base, Not only is it possible to achieve uniform heating of the upper and lower molds, but it is also possible to greatly improve the rate of temperature increase or decrease.
【００１８】[0018]
【発明の実施例】次に、実施例に基づいて本発明をさら
に具体的に説明するが、本発明はこれによって制限され
るものではない。The present invention will be described in more detail based on the following examples, but the invention is not intended to be limited thereby.
【００１９】実施例１ 図１に示した成形装置において、上型及び下型の母材で
あるタングステンカーバイドＷＣを超精密旋盤で所望の
非球面形状に削った後、ダイヤモンドペースト研磨材を
用いて表面粗さＲmax ＝0.０２μｍ以下になるように研
磨し、この表面に耐酸化性及び耐ヌレ性を目的としてス
パッタリングにより白金膜を１μｍの厚さに形成し、成
形型とした。Example 1 In the forming apparatus shown in FIG. 1, tungsten carbide WC, which is the base material of the upper and lower molds, was ground into a desired aspherical shape by an ultra-precision lathe, and then a diamond paste abrasive was used. Polishing was performed so that the surface roughness R max was 0.02 μm or less, and a platinum film was formed on the surface by sputtering for the purpose of oxidation resistance and wettability to a thickness of 1 μm to obtain a molding die.
【００２０】胴型は、成形型母材と同じＷＣを用い、片
方の端面にスプリングを設置するための穴を１２０°等
分に３個設けた。穴の深さは、１１mmとした。この穴に
ばね定数 0.1４kgｆ／mm、自由高さ１６mm、密着高さ7.
４mmのステンレス製スプリングを設置した。As the body mold, the same WC as that of the forming die base material was used, and three holes for installing springs were provided at one end face at equal intervals of 120 °. The depth of the hole was 11 mm. Spring constant 0.14kgf / mm, free height 16mm, close contact height 7.
A 4 mm stainless steel spring was installed.
【００２１】セットするため、まず、下型と胴型を組
み、下型上に球形に加工した光学素子材料Ｆ２ガラス
（小原光学ガラス社製）を載せ、上型を胴型内に入れ、
スプリングで支えさせた。その後、シリンダーを押圧面
が上型の裏面に接触するまで降下させた。In order to set, first, the lower mold and the barrel mold are assembled, the spherically processed optical element material F2 glass (made by Ohara Optical Glass Co., Ltd.) is placed, and the upper mold is put in the barrel mold.
It was supported by a spring. Then, the cylinder was lowered until the pressing surface came into contact with the back surface of the upper mold.
【００２２】次いで、ヒーターにより５００℃まで加熱
した。温度は熱電対によって測定した。高温時には、酸
化による型及び成形部材の劣化を防止するため、雰囲気
ガス供給口により窒素ガスを流入させた。成形型の温度
が５００℃に達した時点でシリンダーを更に降下させ、
光学素子材料であるＦ２ガラスを約１００kg／cm2 の圧
力で押圧成形した。このとき、スプリングは縮んで完全
に穴中に収容されるため、成形品の肉厚も精密に制御可
能である。Then, it was heated to 500 ° C. by a heater. The temperature was measured by a thermocouple. At a high temperature, nitrogen gas was introduced through the atmosphere gas supply port in order to prevent deterioration of the mold and the molded member due to oxidation. When the temperature of the mold reaches 500 ° C, lower the cylinder further,
F2 glass, which is an optical element material, was press-molded at a pressure of about 100 kg / cm 2 . At this time, the spring contracts and is completely housed in the hole, so that the wall thickness of the molded product can be precisely controlled.
【００２３】その後、徐冷し、成形部の温度が光学素子
材料の転移点を下回った４００℃になった時点で圧力を
除き、シリンダーを上昇させ、取り出し可能な温度まで
冷却した後、成形品を取り出した。After that, the material is slowly cooled, and when the temperature of the molding portion reaches 400 ° C., which is below the transition point of the optical element material, the pressure is removed, the cylinder is raised, and the cylinder is cooled to a temperature at which it can be taken out. Took out.
【００２４】得られた成形品は、常に上型及び下型の均
熱化が達成されたため、歪みがなく、また、成形型の表
面が傷つくことないため、１００００回繰り返し使用し
ても良好な成形品が得られた。The obtained molded product has no distortion because the upper mold and the lower mold are always soaked, and the surface of the mold is not damaged. A molded product was obtained.
【００２５】実施例２ この実施例では、図３に示した構造のヒーター内蔵型シ
リンダーを有する成形装置を用いた。胴型に内径１８m
m、外径２６mm、深さ２０mmの溝を設け、この中にスプ
リングを設置した。使用したスプリングは、外径２４mm
で、線径2.３mm、ばね定数0.５kgｆ／mm、自由高さ３０
mm、密着高さ１４mmのものであった。この成形装置を用
いた以外は、実施例１と同じ条件でＦ２ガラスを成形し
たところ、実施例１と同様に繰り返し使用して良好な成
形品が得られた。Example 2 In this example, a molding apparatus having a heater built-in cylinder having the structure shown in FIG. 3 was used. 18m inside diameter
A groove having m, an outer diameter of 26 mm, and a depth of 20 mm was provided, and a spring was installed in this groove. The used spring has an outer diameter of 24 mm.
With wire diameter 2.3 mm, spring constant 0.5 kgf / mm, free height 30
mm, and the adhesion height was 14 mm. When F2 glass was molded under the same conditions as in Example 1 except that this molding apparatus was used, a good molded product was obtained by repeatedly using F2 glass in the same manner as in Example 1.
【００２６】[0026]
【発明の効果】本発明によれば、上型の重量をスプリン
グで支持することができるので、押圧成形前の光学素子
材料が硬い状態のときでも、上型の荷重によって下型の
有効成形面を傷つけることがない。また、上型にシリン
ダー先端の押圧面を接触させておくことができるので、
熱の流れが上型においても下型と同等になり、上、下型
の均熱化が達成され、成形品に歪みが発生しない。さら
に、型に接触する部分、つまり上部シリンダーの先端や
型設置台にヒーター板又は冷却機能を備えた部材を取り
付ければ、上、下型の均熱化を達成できるばかりでな
く、昇温又は降温速度を大幅に向上させることができ
る。According to the present invention, since the weight of the upper mold can be supported by the spring, the effective molding surface of the lower mold can be applied by the load of the upper mold even when the optical element material before press molding is in a hard state. Not hurt. Also, since the pressing surface of the cylinder tip can be kept in contact with the upper mold,
The heat flow in the upper mold is the same as that in the lower mold, so that the upper and lower molds are uniformly heated, and no distortion occurs in the molded product. Furthermore, if a heater plate or a member having a cooling function is attached to the part contacting the mold, that is, the tip of the upper cylinder or the mold installation table, not only can the temperature of the upper and lower molds be equalized, but also the temperature rise or decrease The speed can be greatly improved.
【図１】本発明の一実施態様を示す成形装置の成形部を
押圧成形前の状態で示す説明図である。FIG. 1 is an explanatory view showing a molding section of a molding apparatus showing an embodiment of the present invention in a state before press molding.
【図２】図１に示した成形装置の成形部を押圧成形中の
状態で示す説明図である。FIG. 2 is an explanatory view showing a molding part of the molding device shown in FIG. 1 in a state during press molding.
【図３】本発明の別の実施態様を示す成形装置の成形部
を押圧成形中の状態で示す説明図である。FIG. 3 is an explanatory view showing a molding part of a molding apparatus showing another embodiment of the present invention in a state during press molding.
【図４】図３のＡ−Ａ線断面図（スプリング省略）であ
る。4 is a cross-sectional view (spring omitted) taken along the line AA of FIG.
１ 上型 ２ 下型 ３ 薄膜 ４ 胴型 ５ 肉厚調整部材 ６ 光学素子材料 ７ ヒーター ８ シリンダー ９ 雰囲気ガス供給口 １０ 熱電対 １１ 穴 １２ スプリング １３ 溝 １４ スプリング 1 Upper mold 2 Lower mold 3 Thin film 4 Body 5 Wall thickness adjusting member 6 Optical element material 7 Heater 8 Cylinder 9 Atmosphere gas supply port 10 Thermocouple 11 Hole 12 Spring 13 Groove 14 Spring
Claims (6)
型及び胴型の間で押圧成形することにより光学素子を成
形する成形装置において、胴型の端面に１個以上の穴又
は溝を設け、該穴又は溝内に上型を上方に付勢するスプ
リングを設置したことを特徴とする光学素子の成形装
置。1. A molding apparatus for molding an optical element by heating and softening an optical element material and press-molding it between an upper die, a lower die and a body die, wherein one or more holes or grooves are formed in an end face of the body die. And a spring for urging the upper mold upward in the hole or groove is provided.
に完全に収まるばね力及び高さを有する請求項１記載の
光学素子の成形装置。2. The apparatus for molding an optical element according to claim 1, wherein the spring has a spring force and a height such that the spring is completely set in the hole or groove during press molding.
さより深く、スプリングの自由高さより浅い請求項１記
載の光学素子の成形装置。3. The optical element molding apparatus according to claim 1, wherein the depth of the hole or groove is deeper than the contact height of the spring and shallower than the free height of the spring.
型及び胴型の間で押圧成形することにより光学素子を成
形する方法において、請求項１記載の成形装置の下型上
に光学素子材料を載せ、上型の重量をスプリングで支え
た状態でセットし、光学素子材料を加熱軟化させ、上型
をスプリングを縮めながら押圧して押圧成形することを
特徴とする光学素子の成形方法。4. A method of molding an optical element by heating and softening an optical element material and press-molding it between an upper die, a lower die and a body die, wherein an optical element is formed on the lower die of the molding apparatus according to claim 1. A method for molding an optical element characterized by placing an element material, setting the weight of the upper die in a state of being supported by a spring, softening the optical element material by heating, and pressing the upper die while compressing the spring while pressing the upper die. ..
先端の押圧面を上型裏面と接触させておく請求項４記載
の光学素子の成形方法。5. The method for molding an optical element according to claim 4, wherein the pressing surface at the tip of the cylinder is kept in contact with the back surface of the upper mold even in a step other than the pressing molding step.
内に完全に収まるまで押圧する請求項４記載の光学素子
の成形方法。6. The method for molding an optical element according to claim 4, wherein during the press molding, the spring is pressed until it is completely set in the hole or groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08883692A JP3222534B2 (en) | 1992-04-09 | 1992-04-09 | Optical device molding apparatus and molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08883692A JP3222534B2 (en) | 1992-04-09 | 1992-04-09 | Optical device molding apparatus and molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05286732A true JPH05286732A (en) | 1993-11-02 |
| JP3222534B2 JP3222534B2 (en) | 2001-10-29 |
Family
ID=13954042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08883692A Expired - Fee Related JP3222534B2 (en) | 1992-04-09 | 1992-04-09 | Optical device molding apparatus and molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3222534B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100530479B1 (en) * | 2000-02-15 | 2005-11-23 | 도시바 기카이 가부시키가이샤 | Press forming machine for optical devices |
| US7984626B2 (en) | 2006-01-30 | 2011-07-26 | Toshiba Kikai Kabushiki Kaisha | Die assembly for molding of glass element |
| CN110482841A (en) * | 2019-09-12 | 2019-11-22 | 东莞市凯融光学科技有限公司 | A kind of mold of chalcogenide glass aspherical lens |
-
1992
- 1992-04-09 JP JP08883692A patent/JP3222534B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100530479B1 (en) * | 2000-02-15 | 2005-11-23 | 도시바 기카이 가부시키가이샤 | Press forming machine for optical devices |
| US7984626B2 (en) | 2006-01-30 | 2011-07-26 | Toshiba Kikai Kabushiki Kaisha | Die assembly for molding of glass element |
| CN110482841A (en) * | 2019-09-12 | 2019-11-22 | 东莞市凯融光学科技有限公司 | A kind of mold of chalcogenide glass aspherical lens |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3222534B2 (en) | 2001-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2413678C2 (en) | Method of producing moulded product, mould and method of its production | |
| US6539750B1 (en) | Glass substrate forming mold and production method for glass substrate | |
| US6334335B1 (en) | Method of manufacturing a glass optical element | |
| EP0733598B1 (en) | Method and apparatus for producing optical element | |
| JP2577055B2 (en) | Glass mold | |
| JP3222534B2 (en) | Optical device molding apparatus and molding method | |
| JP3266659B2 (en) | Mold for molding optical element and method for molding optical element | |
| JP4223967B2 (en) | Manufacturing method of glass optical element | |
| JP2003104741A (en) | Press forming apparatus for optical element and method for manufacturing optical element | |
| JP3587499B2 (en) | Method for manufacturing glass molded body | |
| JP3234871B2 (en) | Method for manufacturing glass optical element | |
| JP2000001322A (en) | Optical element forming apparatus and production of optical element | |
| JP3243219B2 (en) | Method for manufacturing glass optical element | |
| JP5121610B2 (en) | Optical element molding method and optical element molding material | |
| JPH09188529A (en) | Device for forming optical element | |
| JP3199825B2 (en) | Optical element molding method | |
| JP3203402B2 (en) | Optical element molding die, method of manufacturing the same, and optical element molding method | |
| JPH10251031A (en) | Method for forming optical element and forming device therefor | |
| JP3950434B2 (en) | Method for producing glass molded body | |
| JP2004277242A (en) | Optical element molding die, method and apparatus | |
| JP2501588B2 (en) | Mold for press molding optical glass element and molding method thereof | |
| JPH0977520A (en) | Optical element forming device and method therefor | |
| JPS6153126A (en) | Molding of pressed lenses with high accuracy | |
| JP4094587B2 (en) | Glass optical element molding method | |
| JPH08133767A (en) | Optical element forming method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |