JPH0427175B2 - - Google Patents
Info
- Publication number
- JPH0427175B2 JPH0427175B2 JP60206242A JP20624285A JPH0427175B2 JP H0427175 B2 JPH0427175 B2 JP H0427175B2 JP 60206242 A JP60206242 A JP 60206242A JP 20624285 A JP20624285 A JP 20624285A JP H0427175 B2 JPH0427175 B2 JP H0427175B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- press
- molding
- unit
- holes
- 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 - Lifetime
Links
- 238000000465 moulding Methods 0.000 claims description 27
- 239000011521 glass Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005498 polishing Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000007517 polishing process Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000005401 pressed glass Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—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
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/02—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing in machines with rotary tables
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/80—Simultaneous pressing of multiple products; Multiple parallel moulds
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はレンズ、特に成形後研磨工程を必要と
しないガラス製プレスレンズを製造するための成
形装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a molding apparatus for manufacturing lenses, particularly pressed glass lenses that do not require a polishing step after molding.
［従来の技術］
従来、型を用いてガラス製レンズ素材を成形す
る装置としては、回転可能なロータリーテーブル
のうえに複数の下型をならべ、この下型に対応し
た位置に上型及びこれを押圧するためのプレスロ
ツドを１組又は複数個設けたプレス成形装置が使
われていた。ところが、近年ガラスと接触する型
の内面を鏡面に磨いておき、このような型を用い
て成形後研磨工程を必要としないガラス製レンズ
を成形する方法が研究されはじめ、一部実用化に
至つている。このようにガラス製レンズを直接プ
レス成形によつて得る方法は、研磨工程を省略で
きるという利点の他、非球面レンズを安価に製造
できるという点からも極めて有用な方法である。[Prior Art] Conventionally, as an apparatus for molding glass lens materials using a mold, a plurality of lower molds are arranged on a rotatable rotary table, and an upper mold and the lower molds are placed in positions corresponding to the lower molds. A press molding device equipped with one or more press rods for pressing was used. However, in recent years, research has begun on a method of molding glass lenses that does not require a post-molding polishing process by polishing the inner surface of the mold that comes into contact with the glass to a mirror surface, and some methods have been put into practical use. It's on. The method of obtaining a glass lens by direct press molding as described above is an extremely useful method not only because a polishing step can be omitted but also because an aspherical lens can be manufactured at low cost.
［発明が解決しようとする課題］
ところが、このような製造方法において使用さ
れる成形装置は、型を雰囲気調整可能な密閉容器
中に収容しなければならないという問題点があ
る。即ち、型の鏡面が高温のガラスと接触し、こ
のとき生じる酸化による劣化を防止するため、通
常非酸化性雰囲気中でプレス成形が行われる必要
があるからである。このため、密閉容器の外部に
ある上型駆動部からの動きを伝えるプレスロツド
の本数は、収納容器の構造を複雑にしないため
に、できるかぎり少なくする必要があり通常一組
の上・下型と胴型を密閉容器に収納し１本のプレ
スロツドによつてプレス成形をおこなつていた。
このようなプレス装置では１回のプレスで１個の
レンズしか製造できず極めて非能率的であつた。[Problems to be Solved by the Invention] However, the molding apparatus used in such a manufacturing method has a problem in that the mold must be housed in a closed container whose atmosphere can be adjusted. That is, in order to prevent the mirror surface of the mold from coming into contact with high-temperature glass and deterioration due to oxidation that occurs at this time, press molding usually needs to be performed in a non-oxidizing atmosphere. For this reason, the number of press rods that transmit the movement from the upper mold drive section outside the sealed container must be minimized to avoid complicating the structure of the storage container. The body mold was stored in a sealed container and press-formed using a single press rod.
This type of press equipment can only produce one lens in one press, and is extremely inefficient.
従つて、本発明が解決しようとする技術課題
は、成形後研磨工程を必要としないガラス製プレ
スレンズを１回のプレス操作により多数個製造し
うる成形装置を提供することにある。 Therefore, the technical problem to be solved by the present invention is to provide a molding apparatus that can manufacture a large number of glass press lenses in one press operation without requiring a polishing process after molding.
［課題を解決するための手段］
上記の課題を解決するため、本発明は上型、下
型及び胴型の複数組を集合させ、この集合式成形
型に対し接離自在に設けられたプレスロツドを使
用して一度に多数のプレスレンズを成形するよう
にしたものである。すなわち、本発明の成形装置
は一度に複数個のガラスレンズをプレス成形する
ためのユニツトモールドが、少くとも、同一円周
上に複数の貫通孔を有する胴型と、前記複数の貫
通孔のそれぞれに嵌合された一対の上型及び下型
と、これらの下型を支持するための支持台とを備
えてなり、成形のための加圧手段が前記上型に対
し接離自在に配置されていることを特徴とするも
のである。[Means for Solving the Problems] In order to solve the above problems, the present invention collects a plurality of sets of upper molds, lower molds, and body molds, and provides a press rod that is provided so as to be able to move toward and away from the assembled molds. It is possible to mold a large number of press lenses at once using the press. That is, in the molding apparatus of the present invention, a unit mold for press-molding a plurality of glass lenses at once includes at least a body mold having a plurality of through holes on the same circumference, and each of the plurality of through holes. It comprises a pair of upper and lower molds fitted into the mold, and a support base for supporting these lower molds, and a pressurizing means for molding is arranged so as to be able to move toward and away from the upper mold. It is characterized by the fact that
また、本発明においては、前記ユニツトモール
ドの胴型が、その中心部に均熱化のための貫通孔
を有していることが好ましい。 Further, in the present invention, it is preferable that the body of the unit mold has a through hole in its center for equalizing heat.
さらに、前記上型の上縁及び／又は前記下型の
下縁にフランジが形成されていることが望まし
い。 Furthermore, it is desirable that a flange be formed on the upper edge of the upper mold and/or the lower edge of the lower mold.
［作用］
胴型を共通とし、その同一円周上に複数個の貫
通孔を設け、これらの貫通孔にそれぞれ一対の上
型と下型を嵌合するとともに、各下型を支持する
ための支持台を備え、しかも加圧手段を上型とは
分離して接離自在に設けることによつて、各上型
は加圧手段の先端の熱歪による影響を受けず、対
応する上型と下型との芯出し、平行度ともに良好
に保持される。[Function] A common body mold is provided, a plurality of through holes are provided on the same circumference, and a pair of upper mold and lower mold are respectively fitted into these through holes, and a pair of upper mold and lower mold are fitted to each of the through holes, and a hole is provided to support each lower mold. By providing a support stand and providing the pressurizing means separately from the upper mold so that they can be freely moved toward and away from each other, each upper mold is not affected by thermal distortion at the tip of the pressurizing means, and is able to interact with the corresponding upper mold. Centering and parallelism with the lower die are well maintained.
［実施例］
つぎに本発明の実施例を図面に従つて説明す
る。[Example] Next, an example of the present invention will be described according to the drawings.
第１図は本発明を実施する装置の一実施例の要
部断面図、第２図は第１図中のユニツトモールド
１及びアーム６の平面図である。図中１は上型
２、下型３の複数組を、胴型４の同一円周上に設
けられた貫通孔に嵌合させたユニツトモールドで
あり、プレス成形時には雰囲気調整可能な密閉容
器５の中に収納され、回転しうるアーム６の上に
載架されている。密閉容器５内には、間けつ的に
回転する軸１２の上部が挿入され、該軸１２の上
端に放射状に伸びるアーム６を固着し、各アーム
先端に前記ユニツトモールド１が載架できるよう
になつている。プレスロツド１０の下端はベロー
ズ１１をとおして密閉容器５中に挿入され、ユニ
ツトモールド１の頂部にまで達している。プレス
ロツド１０の先端１０ａは、同一円周上に配置さ
れた複数の上型２を押圧しやすいように、円盤形
状をなしている。密閉容器５の左方には、排気室
１７を含む型出入部７が設けられている。排気室
１７はシヤツター８，９によつて隔離できるよう
になつている。 FIG. 1 is a sectional view of a main part of an embodiment of an apparatus for implementing the present invention, and FIG. 2 is a plan view of the unit mold 1 and arm 6 in FIG. 1. In the figure, 1 is a unit mold in which multiple sets of an upper mold 2 and a lower mold 3 are fitted into through holes provided on the same circumference of a body mold 4, and an airtight container 5 in which the atmosphere can be adjusted during press molding. It is housed inside and mounted on a rotatable arm 6. The upper part of a shaft 12 that rotates intermittently is inserted into the airtight container 5, and radially extending arms 6 are fixed to the upper end of the shaft 12 so that the unit mold 1 can be mounted on the tip of each arm. It's summery. The lower end of the press rod 10 is inserted into the closed container 5 through the bellows 11 and reaches the top of the unit mold 1. The tip 10a of the press rod 10 has a disk shape so that it can easily press a plurality of upper molds 2 arranged on the same circumference. A mold entrance/exit section 7 including an exhaust chamber 17 is provided on the left side of the closed container 5. The exhaust chamber 17 can be isolated by shutters 8 and 9.
第３図および第４図はそれぞれユニツトモール
ド１の横断面図および縦断面図を示す。ユニツト
モールド１は第３図および第４図に示すように中
心部に空孔１４のある中空円筒の厚肉部に、円筒
軸線と平行する多数（図では８個）の成形用孔１
５を同一円周上にあけて胴型４とし、この成形用
孔１５に上型２および下型３を嵌挿させてなるも
のである。胴型部材の中心部の空孔１４は胴型４
の温度の均一化に対して有効であるが、必ずしも
必要とされるものではない。また成形用孔１５は
８個に限定されず、その数は成形レンズの大きさ
によつて適宜選択される。 3 and 4 show a cross-sectional view and a longitudinal cross-sectional view of the unit mold 1, respectively. As shown in FIGS. 3 and 4, the unit mold 1 has a large number of molding holes 1 (eight in the figure) parallel to the cylinder axis in a thick walled part of a hollow cylinder with a hole 14 in the center.
5 on the same circumference to form a body mold 4, and an upper mold 2 and a lower mold 3 are fitted into the molding holes 15. The hole 14 in the center of the body mold member is formed in the body mold 4.
This is effective for making the temperature uniform, but it is not always necessary. Further, the number of molding holes 15 is not limited to eight, and the number is appropriately selected depending on the size of the molded lens.
次に第１図、第２図を参照して本発明の成形装
置を用いた成形法を説明する。アーム６は左回り
に回転できるようになつており、回転に従つてプ
レス領域Ａ、徐冷領域Ｂ、型出入口Ｃ、加熱領域
Ｄを通過するようになつている。まず、ユニツト
モールド１内の複数個の成形型中にあらかじめガ
ラスプリフオームを挿入する（すなわち図示例で
はユニツトモールド１内に８つの成形型があるた
め８個のガラスプリフオームが挿入される）。次
にシヤツター９を開き、このユニツトモールド１
を把持具１９によつて排気室１７に設置し、シヤ
ツター９を閉じてから、排気室１７の中を密閉容
器５と同じ非酸化性雰囲気にした後、シヤツター
８を開き把持具２０によりユニツトモールド１を
支持台２１上に載置して、シヤツター８を閉じ
る。次にアーム６を回転させて、ユニツトモール
ドを加熱領域Ｄに移す。（図では加熱装置は省略
してある。）ここで型中のガラスプリフオームを
成形可能な温度（例えばガラス粘土が108.5〜
1010.5ポアズに相当する温度）まで加熱した後、
再びアーム６を回転してユニツトモールド１をプ
レス領域Ａに移す。ここでこのユニツトモールド
１はプレスロツド１０により押圧され、型中のガ
ラスプリフオームはレンズに成形される。 Next, a molding method using the molding apparatus of the present invention will be explained with reference to FIGS. 1 and 2. The arm 6 is designed to be able to rotate counterclockwise, and as it rotates, it passes through a press area A, an annealing area B, a mold entrance/exit C, and a heating area D. First, glass preforms are inserted in advance into a plurality of molds in the unit mold 1 (that is, in the illustrated example, since there are eight molds in the unit mold 1, eight glass preforms are inserted). Next, open the shutter 9 and press this unit mold 1.
is placed in the exhaust chamber 17 using the gripper 19, the shutter 9 is closed, and the inside of the exhaust chamber 17 is made into the same non-oxidizing atmosphere as the airtight container 5. After that, the shutter 8 is opened and the unit mold is removed using the gripper 20. 1 on the support stand 21, and the shutter 8 is closed. Next, the unit mold is moved to the heating area D by rotating the arm 6. (The heating device is omitted in the figure.) Here, the temperature at which the glass preform in the mold can be formed (for example, glass clay is 10 8.5 ~
After heating to a temperature corresponding to 10 10.5 poise),
The unit mold 1 is moved to the press area A by rotating the arm 6 again. Here, this unit mold 1 is pressed by a press rod 10, and the glass preform in the mold is molded into a lens.
プレス成形を完了したユニツトモールド１はア
ーム６の回転により徐冷領域Ｂに移されて所定の
温度にまで冷却される。その後、アーム６を再び
回転させて、ユニツトモールド１を型出入口Ｃに
戻し、シヤツター８を開き、把持具２０を用いて
ユニツトモールド１を排気室１７に移した後、シ
ヤツター８を閉じて型を250℃まで急冷し、次に
シヤツター９を開いてユニツトモールド１を把持
具１９により密閉容器外１８に取り出す。 The unit mold 1 that has been press-molded is moved to the slow cooling area B by the rotation of the arm 6 and cooled to a predetermined temperature. After that, the arm 6 is rotated again, the unit mold 1 is returned to the mold entrance C, the shutter 8 is opened, and the unit mold 1 is transferred to the exhaust chamber 17 using the gripper 20, and then the shutter 8 is closed and the mold is closed. The unit mold 1 is rapidly cooled to 250° C., and then the shutter 9 is opened and the unit mold 1 is taken out from the closed container 18 using the gripping tool 19.
本実施例においては、複数のアーム上にユニツ
トモールドを載置したが、本発明はこのアームに
限定されることなく、例えばこのアームに換えて
回転テーブルを用いてもよい。 In this embodiment, the unit mold is placed on a plurality of arms, but the present invention is not limited to these arms, and for example, a rotary table may be used in place of these arms.
第５図および第６図はユニツトモールドの変形
例を示し、それぞれ横断面図および縦断面図であ
り、上型２の上縁及び下型３の下縁にフランジ２
２を形成しておき、このフランジ２２が胴型４に
当接することにより、レンズの中心肉厚が一定に
規制されるようにした場合を示す。 5 and 6 show modified examples of the unit mold, and are a cross-sectional view and a vertical cross-sectional view, respectively.
2 is formed and this flange 22 comes into contact with the barrel mold 4, thereby regulating the central thickness of the lens to a constant value.
［発明の効果］
本発明によれば、ユニツトモールドの各下型上
に、成形可能な温度に保持されたガラスプリフオ
ームを供給し、前記ユニツトモールドとは分離し
たプレスロツドの作動によりユニツトモールドを
構成する各成形型を加圧して複数個のガラスレン
ズを同時にプレス成形するための、一度のプレス
操作で多数のレンズを製造することが可能であ
り、加えて、各上型は加圧手段の先端の熱歪によ
る影響を受けず、対応する上型と下型との芯出
し、平行度ともに良好に保持され、成形精度の高
いレンズが得られる。また、１本のプレスロツド
しか使用しないため、密閉容器の密閉度も良く保
たれるほか、装置全体も複雑にならず簡単でコン
パクトとなる利点がある。[Effects of the Invention] According to the present invention, a glass preform maintained at a moldable temperature is supplied onto each lower mold of a unit mold, and the unit mold is constructed by operating a press rod separate from the unit mold. It is possible to manufacture a large number of lenses in a single press operation by pressurizing each mold to simultaneously press-mold multiple glass lenses, and in addition, each upper mold is The lens is not affected by thermal distortion, the centering and parallelism of the corresponding upper and lower molds are maintained well, and a lens with high molding accuracy can be obtained. Furthermore, since only one press rod is used, the airtightness of the sealed container is maintained well, and the entire apparatus has the advantage of being simple and compact without being complicated.
第１図は本発明を実施する装置の一実施例の要
部断面図、第２図は第１図で使用されるユニツト
モールドおよびアームの平面図、第３図はユニツ
トモールドの横断面図、第４図はその縦断面図、
第５図及び第６図はユニツトモールドの構造の別
の例を示し、第５図は第６図の−線での横断
面図、第６図は縦断面図である。
１……ユニツトモールド、２……上型、３……
下型、４……胴型、５……密閉容器、６……アー
ム、７……型出入部、８，９……シヤツター、１
０……プレスロツド、１１……ベローズ、１４…
…空孔、１５……成形用孔、１７……排気室、１
８……密閉容器外、１９，２０……把持具、２１
……支持台、２２……フランジ、Ａ……プレス領
域、Ｂ……徐冷領域、Ｃ……出入口、Ｄ……加熱
領域。
FIG. 1 is a cross-sectional view of essential parts of an embodiment of an apparatus for carrying out the present invention, FIG. 2 is a plan view of the unit mold and arm used in FIG. 1, and FIG. 3 is a cross-sectional view of the unit mold. Figure 4 is a longitudinal cross-sectional view of the
5 and 6 show another example of the structure of the unit mold, in which FIG. 5 is a cross-sectional view taken along the - line in FIG. 6, and FIG. 6 is a vertical cross-sectional view. 1...Unit mold, 2...Upper mold, 3...
Lower mold, 4... Trunk mold, 5... Airtight container, 6... Arm, 7... Mold entrance/exit part, 8, 9... Shutter, 1
0...Press rod, 11...Bellows, 14...
...Vacancy, 15...Molding hole, 17...Exhaust chamber, 1
8... Outside the sealed container, 19, 20... Gripping tool, 21
...Support stand, 22...Flange, A...Press area, B...Low cooling area, C...Inlet/exit, D...Heating area.
Claims (1)
るためのユニツトモールドが、少くとも、同一円
周上に複数の貫通孔を有する胴型と、前記複数の
貫通孔のそれぞれに嵌合された一対の上型及び下
型と、これらの下型を支持するための支持台とを
備えてなり、成形のための加圧手段が前記上型に
対し接離自在に配置されていることを特徴とする
レンズのプレス成形装置。 ２ 前記ユニツトモールドの胴型が、その中心部
に均熱化のための貫通孔を有していることを特徴
とする特許請求の範囲第１項記載のレンズのプレ
ス成形装置。 ３ 前記上型の上縁及び／又は前記下型の下縁に
フランジが形成されていることを特徴とする特許
請求の範囲第１項記載のレンズのプレス成形装
置。[Claims] 1. A unit mold for press-molding a plurality of glass lenses at once includes at least a body mold having a plurality of through holes on the same circumference, and a body mold having a plurality of through holes in each of the plurality of through holes. It comprises a pair of upper and lower molds fitted together, and a support base for supporting these lower molds, and a pressurizing means for molding is arranged so as to be able to move toward and away from the upper mold. A lens press molding device characterized by: 2. The lens press molding apparatus according to claim 1, wherein the body of the unit mold has a through hole in the center thereof for equalizing heat. 3. The lens press molding apparatus according to claim 1, wherein a flange is formed on the upper edge of the upper die and/or the lower edge of the lower die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20624285A JPS6270235A (en) | 1985-09-20 | 1985-09-20 | Method of press molding for lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20624285A JPS6270235A (en) | 1985-09-20 | 1985-09-20 | Method of press molding for lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6270235A JPS6270235A (en) | 1987-03-31 |
| JPH0427175B2 true JPH0427175B2 (en) | 1992-05-11 |
Family
ID=16520096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20624285A Granted JPS6270235A (en) | 1985-09-20 | 1985-09-20 | Method of press molding for lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6270235A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4981419A (en) * | 1972-11-16 | 1974-08-06 |
-
1985
- 1985-09-20 JP JP20624285A patent/JPS6270235A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4981419A (en) * | 1972-11-16 | 1974-08-06 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6270235A (en) | 1987-03-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |