JPH0238332A - Flexural forming process for laminated raw plate glass for laminated glass and unit therefor - Google Patents
Flexural forming process for laminated raw plate glass for laminated glass and unit thereforInfo
- Publication number
- JPH0238332A JPH0238332A JP20308688A JP20308688A JPH0238332A JP H0238332 A JPH0238332 A JP H0238332A JP 20308688 A JP20308688 A JP 20308688A JP 20308688 A JP20308688 A JP 20308688A JP H0238332 A JPH0238332 A JP H0238332A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- bending
- laminated
- blank
- laminated blank
- 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
- 239000005340 laminated glass Substances 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000005357 flat glass Substances 0.000 title claims abstract description 10
- 230000008569 process Effects 0.000 title abstract description 6
- 238000005452 bending Methods 0.000 claims abstract description 234
- 239000011521 glass Substances 0.000 claims abstract description 190
- 238000010438 heat treatment Methods 0.000 claims abstract description 46
- 239000000919 ceramic Substances 0.000 claims description 22
- 239000006121 base glass Substances 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 claims description 4
- 230000003028 elevating effect Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 5
- 239000013067 intermediate product Substances 0.000 abstract 2
- 239000012467 final product Substances 0.000 abstract 1
- 239000004744 fabric Substances 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000009191 jumping Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 239000006082 mold release agent Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002594 fluoroscopy Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明は、加熱炉内にて合せガラス用の二枚の合せ素板
ガラスを同時に曲げ成形する方法及びその装置に係り、
特に、合せガラスの側部を深曲げするのに最適な合せガ
ラス用合せ素板ガラスの曲げ成形方法及びその装置の改
良に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method and apparatus for simultaneously bending and forming two sheets of laminated blank glass for laminated glass in a heating furnace.
In particular, the present invention relates to a method for bending and forming laminated blank glass for laminated glass that is optimal for deeply bending the side portions of laminated glass, and improvements to the apparatus.
[従来の技術]
一般に、合せガラスは、二枚の合せ素板ガラスをポリビ
ニールブチラール膜等のプラスチック中間膜で積層した
ものであり、安全上の観点から特に自動車の風防窓であ
るフロントガラスとして広(利用されている。[Prior Art] Generally, laminated glass is made by laminating two sheets of laminated glass with a plastic interlayer film such as a polyvinyl butyral film, and from a safety standpoint, it is widely used as windshields, which are automobile windshields. (It's being used.
ところで、この種の合せガラスは、通常自動車のデザイ
ン上の理由から湾曲状のものが要求されるため、合せガ
ラス用の二枚の合せ素板ガラスについては平板状のもの
を適宜曲げ成形することが必要になる。このとき、両合
せ素板ガラスを別々に成形すると、両合せ素板ガラスの
曲面形状が微妙に異なってしまい、両ガラス間に中間膜
を介在させて合せ加工する際に、二枚の合せ素板ガラス
が中間膜を介して接合しなかったり、接合面に気泡が発
生したり、あるいは使用中に合せガラスの接合面に気泡
が発生したり、剥離したりするという欠点があった。そ
のため、従来より合せガラスを製造する際、二枚の合せ
素板ガラスを重ねて同時に曲げ成形する方法が採用され
ていた。By the way, this type of laminated glass is usually required to have a curved shape for reasons of automobile design, so for the two sheets of laminated raw glass for laminated glass, it is possible to suitably bend and form flat sheets. It becomes necessary. At this time, if the two laminated glass sheets are molded separately, the curved shapes of the two laminated glass sheets will be slightly different. There are disadvantages in that the bonding is not done through an interlayer film, bubbles are generated on the bonding surface, or bubbles are generated on the bonding surface of the laminated glass during use, and the glass peels off. For this reason, conventionally, when manufacturing laminated glass, a method has been adopted in which two sheets of laminated glass are stacked and bent at the same time.
従来における合せガラス用合せ素板ガラスの曲げ成形方
法としては、合せガラスの曲げ成形面に対応する曲げ型
を構成し、この曲げ型の上に合せガラス用の二枚の合せ
素板ガラスを重ねて載置した状態で曲げ型を加熱炉内に
搬入すると共に、両合せ素板ガラスをそのガラス軟化温
度まで加熱し、両ガラスの軟化に伴って上記曲げ型の曲
げ成形面に沿って両合せ素板ガラスを自重曲げ成形する
ようにしたものが知られている(特公昭49−1033
2号公報参照)。The conventional method for bending and forming laminated blank glass for laminated glass is to construct a bending die that corresponds to the bending surface of the laminated glass, and to place two pieces of laminated blank glass for laminated glass on top of this bending die. At the same time, the bending die is carried into a heating furnace in the state in which the double laminated blank glass is heated to its glass softening temperature, and as both glasses soften, the double laminated blank glass is moved along the bending surface of the bending die. It is known that the product is bent under its own weight (Special Publication No. 49-1033)
(See Publication No. 2).
このような方法において、上記合せガラスの側部を深曲
げ成形する必要がある場合には、合せガラスの中間湾曲
部に対応した曲げ成形面を有するリング状の固定割型と
、合せガラスの側部の深曲げ部に対応した曲げ成形面を
有し、且つ前記固定割型の両側若しくは片側に自重で固
定割型に連なる方向へ向かうべく可動自在に設けられる
リング状の可動割型とで上記曲げ型を構成し、上記可動
割型を展開させた状態で曲げ型上に平板状の二枚の素板
ガラスを重ねて載置した後、この素板ガラスを加熱炉内
に搬入して加熱し、上記両ガラスの軟化に伴って上記可
動割型を固定割型に連なる方向へ移動させ、両ガラスの
側部を可動割型で深曲げするようにした自重曲げによる
ものが既に提供されている。In such a method, if it is necessary to deep bend the side part of the laminated glass, a ring-shaped fixed split mold having a bending surface corresponding to the intermediate curved part of the laminated glass and the side part of the laminated glass are used. a ring-shaped movable split mold having a bending surface corresponding to the deep bending part of the part, and provided on both sides or one side of the fixed split mold so as to be movable under its own weight in a direction connected to the fixed split mold; After configuring a bending mold and placing two flat sheets of raw glass on top of each other on the bending mold with the movable split mold expanded, the raw glass is carried into a heating furnace and heated, A self-weight bending method has already been provided in which the movable split mold is moved in a direction continuous with the fixed split mold as the two glasses soften, and the sides of both glasses are deeply bent by the movable split mold.
[発明が解決しようとする課題]
しかしながら、このような従来の合せガラス用素板ガラ
スの曲げ成形方法にあっては、合せガラス用の両合せ素
板ガラスの側部を深曲げする際には自重で変位する可動
割型で画素板ガラスの側部を強制的に曲げ成形するよう
になっているが、合せガラスの側部の深曲げ度合を大き
くする場合には、画素板ガラスの深曲げ部の周縁形状に
ついては可動割型に沿った形状に成形できるものの、画
素板ガラスの深曲げ部の周縁を除く曲面部の面形状につ
いては軟化した素板ガラスの変形度合が所望の曲率面を
作る上で追従し得ない事態を生じ、画素板ガラスの深曲
げ部の成形が不充分になるという問題を生ずる。[Problems to be Solved by the Invention] However, in such a conventional method for bending and forming blank glass for laminated glass, when deeply bending the sides of double-laminated blank glass for laminated glass, it is necessary to The sides of the pixel plate glass are forcibly bent using a movable split mold that moves, but when increasing the degree of deep bending of the sides of the laminated glass, it is necessary to change the peripheral shape of the deeply bent part of the pixel plate glass. Although it is possible to form the pixel plate glass into a shape that follows the movable split mold, the degree of deformation of the softened blank glass cannot be followed to create the desired curvature surface for the surface shape of the curved part of the pixel plate glass except for the periphery of the deep bending part. This results in a problem that the deeply bent portion of the pixel plate glass becomes insufficiently formed.
又、深曲げしようとする部分をより局部的に加熱して曲
げ加工しやすくすることも行なえるが、これによっても
まだ不充分である。It is also possible to locally heat the part to be bent deeply to make it easier to bend, but even this is still insufficient.
このような問題を解決するために、面形状を正確に成形
し得る方法として、凹型と凸型との間にガラス板を挟ん
で成形するプレス法を応用することが考えられるが、合
せガラスの場合には二枚の合せ素板ガラスを同時に成形
しなければならないことから、成形時において二枚の合
せ素板ガラスを正確に位置決めして保持することが必要
になる。ところが、吊下げあるいは吸着等公知の手法を
用いて二枚合せ素板ガラスを保持しようとしても、両合
せ素板ガラスを正確に位置決めして保持することができ
ず、結局のところ、上記プレス法をそのまま応用するこ
とができないという問題点があった。In order to solve this problem, a press method in which a glass plate is sandwiched between a concave mold and a convex mold may be applied as a method to form the surface shape accurately, but it is difficult to form laminated glass. In some cases, two sheets of laminated blank glass must be molded at the same time, so it is necessary to accurately position and hold the two sheets of laminated blank glass during molding. However, even when attempting to hold two laminated blank glass sheets using known methods such as hanging or suction, it was not possible to accurately position and hold the two laminated blank glass sheets, and in the end, the pressing method described above could not be used as is. The problem was that it could not be applied.
あるいは又、この様な問題を解決するために、ガラス板
の側部の曲げ加工が容易となる様に得ようとする合せガ
ラスの設計寸法よりも大きな2枚の合せ素板ガラスを用
意し、このオーバーサイズの合せ素板ガラス2枚を重ね
て同時に曲げ加工して所望の成形形状を得、次いで周辺
部を切断して所望の設計寸法の合せガラス用の合せ素板
ガラス2枚を得るというオーバーサイズ加工方法もある
が、曲げ加工後の切断工程が必要で、手間とコストがか
かるという欠点があった。Alternatively, in order to solve this problem, two pieces of laminated blank glass are prepared that are larger than the design dimensions of the laminated glass to be obtained so that the side parts of the glass plates can be easily bent. Oversize processing involves stacking and simultaneously bending two oversized pieces of laminated blank glass to obtain the desired molded shape, and then cutting the periphery to obtain two pieces of laminated blank glass for laminated glass with the desired design dimensions. There are other methods, but they have the disadvantage of requiring a cutting process after bending, which is time consuming and costly.
本発明は、以上の問題点に着目してなされたものであっ
て、合せガラスの側部を確実に深曲げ成形することがで
きる合せガラスの曲げ成形方法及びその装置を提供する
ことを課題とするものである。The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a method and apparatus for bending a laminated glass, which can reliably deeply bend the side portions of the laminated glass. It is something to do.
[課題を解決するための手段]
即ち、上記課題を達成する本発明の合せガラス用合せ素
板ガラスの曲げ成形方法は、合せガラス用の二枚の合せ
素板ガラスを重ねて両合せ素板ガラスの側部が深曲げさ
れるべき同時に曲げ成形するに際し、二枚の合せ素板ガ
ラスを所望の成形面を有する自重曲げ加工用曲げ型に載
置し、この曲げ型に載置された二枚の合せ素板ガラスを
加熱炉内の加熱・曲げ加工処理ステージにて上記ガラス
の曲げ加工温度まで加熱するとともに、両合せ素板ガラ
スの側部の深曲げする部分を局部的により高温に加熱し
、二枚の合せ素板ガラスを自重曲げ加工用曲げ型に略沿
わせた形状に仮成形し、次いで直ちに二枚の重ねられた
合せ素板ガラスの上方から合せ素板ガラスの深曲げ部分
を上記曲げ型、又は別に用意された曲げ型に載置した状
態において補助プレス部材により押付けて二枚の合せ素
板ガラスを同時にプレス成形することを特徴とする合せ
ガラス用合せ素板ガラスの曲げ成形方法に関するもので
ある。[Means for Solving the Problems] That is, the method of bending and forming laminated blank glass for laminated glass of the present invention that achieves the above-mentioned problems involves stacking two sheets of laminated blank glass for laminated glass and bending the sides of both laminated blank glasses. When simultaneously bending and forming a part to be deeply bent, two pieces of laminated raw glass are placed on a bending mold for self-weight bending having a desired forming surface, and the two laminated glass sheets placed on this bending mold are The plate glass is heated to the above-mentioned glass bending temperature in the heating and bending processing stage in the heating furnace, and the side portions of the double laminated blank glass to be deeply bent are locally heated to a higher temperature to bond the two sheets together. The blank glass is temporarily formed into a shape that roughly follows the bending die for self-weight bending, and then immediately from above the two stacked laminated blank glasses, the deep bent part of the laminated blank glass is cut into the above bending die or separately prepared. The present invention relates to a method for bending and forming laminated blank glass for laminated glass, characterized in that two sheets of laminated blank glass are press-formed at the same time by pressing with an auxiliary press member while placed on a bending die.
又、上記合せガラス用素板ガラスの曲げ成形方法を実現
する装置は、合せガラス用の二枚の合せ素板ガラスを重
ねて両合せ素板ガラスの側部が深曲げされるべく同時に
曲げ成形する合せガラス用の合せ素板ガラスの曲げ成形
装置であって、上記合せ素板ガラスの成形対象中間湾曲
部に対応した曲げ成形面と成形対象潔白げ部に対応した
曲げ成形面とを有する自重曲げ加工用曲げ型と、該曲げ
型の上方であって合せ素板ガラスの成形対象側方深凹げ
部に対応する部分に設けられた補助プレス部材と、該補
助プレス部材の昇降機構とを備えたことを特徴とするも
のである。Further, the apparatus for realizing the above-mentioned method for bending and forming raw glass for laminated glass is a laminated glass that simultaneously bends and forms two sheets of laminated glass for laminated glass so that the sides of both laminated glass sheets are deeply bent. A bending die for self-weight bending processing, which is a bending device for laminated blank glass for use, which has a bending surface corresponding to the middle curved part to be formed of the laminated blank glass and a bending surface corresponding to the blank part to be formed. and an auxiliary press member provided above the bending mold in a portion corresponding to the deep concave portion on the side of the laminated blank glass to be formed, and an elevating mechanism for the auxiliary press member. It is something to do.
このような技術的手段において、合せガラス用の二枚の
合せ素板ガラスを曲げ成形する際の加熱・曲げ加工類の
構成については、少なくとも、成形対象となる合せ素板
ガラスをこのガラスの軟化温度まで加熱する加熱・曲げ
加工処理ステージと、加熱軟化された合せ素板ガラスの
側部を補助プレス部材にて深曲げ成形するプレス処理ス
テージとを包含したものであれば適宜設計変更して差支
えない。この場合において、曲げ成形性を良好に保つと
いう観点からすれば、加熱曲げ加工処理ステージにおい
て、深曲げ対象となる合せ素板ガラスの側部を他の部分
よりもより高い温度に局部的に加熱するようにすること
が好まし°い。かかる局部加熱のためには、深曲げ対象
となる二枚の合せ素板ガラスの部分の上側、又は下側、
又は上下側に近接して局部ヒーターを配するのが好まし
い。In such technical means, when bending and forming two pieces of laminated raw glass for laminated glass, the configuration of heating and bending processes must at least keep the laminated raw glass to be formed up to the softening temperature of the glass. The design may be modified as appropriate as long as it includes a heating/bending processing stage for heating and a press processing stage for deep bending the side portion of the heat-softened laminated blank glass using an auxiliary press member. In this case, from the viewpoint of maintaining good bending formability, in the heating bending processing stage, the sides of the laminated blank glass to be deep bent are locally heated to a higher temperature than other parts. It is preferable to do so. For such local heating, it is necessary to
Alternatively, it is preferable to arrange local heaters close to the upper and lower sides.
また、二枚の合せ素板ガラスの上記搬送手段としては、
加熱・曲げ加工炉内にて曲げ型を搬送し得るものであれ
ば、台車を所定の循環経路あるいは進退経路に沿って移
動させるようにしてもよいし、耐熱性の搬送ロールや搬
送ベルト等からなる連続的なコンベアを用いる等適宜設
計変更して差支えない。この場合において、搬送手段に
ついては、プレス処理ステージでの曲げ型と補助プレス
部材を備えた補助プレス手段との相対位置関係を正確に
しなければならないことから、機械的な位置決め手段を
付設したり、制御系で搬送手段を位置決め制御すること
が必要である。In addition, as the above-mentioned conveyance means for two sheets of laminated glass,
As long as the bending mold can be transported in the heating/bending furnace, the cart may be moved along a predetermined circulation path or forward/backward path, or it may be moved from a heat-resistant transport roll or belt, etc. The design may be changed as appropriate, such as by using a continuous conveyor. In this case, regarding the conveyance means, since the relative positional relationship between the bending mold on the press processing stage and the auxiliary press means equipped with the auxiliary press member must be accurate, mechanical positioning means may be attached or It is necessary to control the positioning of the conveying means using a control system.
更にまた、上記補助プレス手段については、曲げ型がプ
レス処理ステージに到達した際に曲げ型と干渉すること
なく、プレス処理ステージにてセット位置に設定された
曲げ型の合せ素板ガラスの成形対象中間湾曲部に対応し
た曲げ成形面に略直交する方向から合せ素板ガラスの側
部を補助プレス部材で押圧するものであれば適宜設計変
更して差支えない。そして、上記補助プレス部材の設置
箇所としては、曲げ型との相対位置関係を正確に出し易
いという観点から、又、加熱処理ステージでの熱効率、
補助プレス部材支持機構の耐久性を考慮すれば、曲げ型
の上方のプレス処理ステージの適当な箇所に設置するこ
とが好ましい。そしてまた、補助プレス部材の形状につ
いても、バイブ状のものであってもよいし、合せガラス
の深曲げ郡全体に対応して形成してもよいが、少なくと
も、加熱・曲げ加工処理ステージだけでは成形が不完全
になり易い深曲げの曲率の大きい箇所に対応して形成す
るようにすればよい。又、深曲げ部の曲率が部分的に異
なる形状に曲げ加工する場合には、この曲げ形状に応じ
た異なる曲率な有するプレス面を有する補助プレス部材
が用いられる。Furthermore, the above-mentioned auxiliary press means does not interfere with the bending die when the bending die reaches the press processing stage, and presses the bending die set at the set position on the press processing stage to form the laminated blank glass. The design may be changed as appropriate as long as the side portion of the laminated blank glass is pressed by the auxiliary press member from a direction substantially perpendicular to the bending surface corresponding to the curved portion. The installation location of the auxiliary press member was selected from the viewpoint of making it easy to accurately determine the relative positional relationship with the bending die, and also from the viewpoint of thermal efficiency at the heat treatment stage.
Considering the durability of the auxiliary press member support mechanism, it is preferable to install it at an appropriate location on the press processing stage above the bending die. The shape of the auxiliary press member may be a vibrator or may be formed to correspond to the entire deep bending group of the laminated glass, but at least it can be formed only at the heating and bending processing stage. It is preferable to form it corresponding to a deep bend with a large curvature where forming is likely to be incomplete. Further, when bending the deeply bent portion into a shape with partially different curvatures, an auxiliary press member having a press surface with a different curvature according to the bent shape is used.
[作 用]
上述したような技術的手段によれば、曲げ型に載置され
た合せガラス用の二枚の合せ素板ガラスは、加熱・曲げ
加工炉内の加熱・曲げ加工処理ステージにてガラス軟化
温度まで加熱されて曲げ型に略沿った形状に仮成形され
た後、仮成形された二枚の合せ素板ガラスの不完全成形
箇所、具体的には合せ素板ガラスの深曲げ箇所は、加熱
・曲げ加工炉内の加熱・曲げ加工処理ステージの後段に
位置するプレス処理ステージにて、曲げ型の深曲げ対応
部に沿って部分的にプレス成形される。[Function] According to the above-mentioned technical means, two pieces of laminated base glass for laminated glass placed on a bending mold are heated and bent at the heating and bending processing stage in a heating and bending furnace. After being heated to a softening temperature and temporarily formed into a shape that roughly follows the bending die, the incompletely formed parts of the two temporarily formed laminated blank glasses, specifically the deeply bent parts of the laminated blank glass, are heated.・At the press stage located after the heating and bending stage in the bending furnace, it is partially press-formed along the deep bend corresponding part of the bending die.
[実施例コ
以下、添付図面に示す実施例に基づいて本発明に係る合
せガラス用の合せ素板ガラスの曲げ成形方法及びその装
置を詳細に説明する。[Example 7] Hereinafter, a method and an apparatus for bending a laminated blank glass for laminated glass according to the present invention will be explained in detail based on an example shown in the accompanying drawings.
及五■ユ
第1図は合せガラス用の合せ素板ガラスの両側部を深曲
げ成形する合せガラス用の合せ素板ガラスの曲げ成形シ
ステムに本発明を適用したものである。FIG. 1 shows the present invention applied to a bending system for laminated blank glass for laminated glass, which deep bends both sides of the laminated blank glass for laminated glass.
同図において、合せガラス用の一対の合せ素板ガラスは
、自重曲げ加工用曲げ型10上に重ねて載置され、図示
外のチェーンコンベアを介して移動する台車26からな
る搬送手段25によって該曲げ型10と共に加熱・曲げ
加工炉2内の加熱・曲げ加工処理ステージSTI、及び
プレス処理ステージST2を経た後、加熱・曲げ加工炉
2外の冷却処理ステージST3に搬送されるようになっ
ている。そして、上記加熱・曲げ加工処理ステージST
Iでは加熱炉2内のヒータ3によって合せ素板ガラス1
がガラス軟化温度(550〜650℃)まで加熱されて
軟化し、曲げ型10の成形面に略沿って仮成形され、プ
レス処理ステージST2では補助プレス手段30によっ
て合せ素板ガラス1の深曲げ部の不完全成形部が部分的
にプレス成形され、冷却処理ステージST3ではプレス
成形された合せ素板ガラス1は好ましくない歪が入らな
い様にするために合せ素板ガラス1を曲げ型10上で所
定時間制御された冷却速度で移動しながら徐々に冷却し
、しかる後、冷却処理ステージST3から搬出され成形
された二枚の合せ素板ガラス1を放冷するようになって
いる。In the figure, a pair of laminated blank glasses for laminated glass are stacked on a bending die 10 for self-weight bending, and are bent by a conveying means 25 consisting of a trolley 26 that moves via a chain conveyor (not shown). After passing through the heating and bending processing stage STI in the heating and bending furnace 2 and the press processing stage ST2 together with the mold 10, it is transported to the cooling processing stage ST3 outside the heating and bending furnace 2. Then, the heating/bending processing stage ST
In I, the laminated blank glass 1 is heated by the heater 3 in the heating furnace 2.
is heated to the glass softening temperature (550 to 650°C) and softened, and is temporarily formed approximately along the forming surface of the bending die 10. In the press processing stage ST2, the deep bending portion of the laminated blank glass 1 is pressed by the auxiliary press means 30. The incompletely formed portion is partially press-formed, and in the cooling treatment stage ST3, the press-formed laminated blank glass 1 is bent on a bending die 10 for a predetermined period of time to prevent undesirable distortion from occurring. While moving at the specified cooling rate, the glass is gradually cooled down, and then the two laminated blank glass sheets 1 that have been carried out from the cooling treatment stage ST3 and formed are left to cool.
二枚の合せ素板ガラスを載置する自重曲げ加工用曲げ型
としては、加熱・曲げ加工炉内のガラス板の成形温度(
580〜700℃)に耐える程度の耐熱材で合せ素板ガ
ラスの成形対象中間湾曲部に対応した曲げ成形面と成形
対象深曲げ部に対応した曲げ成形面とを有する様に構成
したタイプのものが好ましく使用できる。かかる曲げ型
の構成としては、合せ素板ガラスに対応した面状のもの
、合せ素板ガラスの周縁を支持し得るリング状のものい
ずれでもよいが、合せ素板ガラスの表面性を滑かに保つ
には、合せ素板ガラスの表面と曲げ型との接触範囲を極
力少なくするという点でリング状のものが好ましい。又
この種自重曲げ加工用曲げ型は所望の成形面を持った固
定タイプの型即ち、割なしタイプの型であってもよいし
、あるいは曲げ型を割型とし、固定割型と可動割型とに
分割される様にして構成された割型タイプの型であって
もよい。As a bending die for self-weight bending on which two laminated blank glass sheets are placed, the forming temperature of the glass plate in the heating/bending furnace (
A type of heat-resistant material that can withstand temperatures of 580 to 700°C) is constructed so that it has a bending surface corresponding to the middle curved part to be formed of the laminated blank glass and a bending surface corresponding to the deep bending part to be formed. It can be used preferably. The configuration of such a bending mold may be either a planar shape that is compatible with the laminated base glass or a ring shape that can support the periphery of the laminated base glass, but in order to maintain the smooth surface of the laminated base glass, A ring-shaped one is preferable in that it minimizes the contact area between the surface of the laminated blank glass and the bending die. In addition, this type of bending die for self-weight bending may be a fixed type die with a desired forming surface, that is, a split type die, or the bending die may be a split die, and a fixed split die and a movable split die may be used. It may also be a split type mold configured to be divided into two parts.
第2図に例示した自重曲げ加工用曲げ型は、割型タイプ
のものであり、搬送手段の台車26上に載置されており
、深曲げ成形された合せ素板ガラス1の両側部を除(中
央湾曲部に対応した曲げ成形面11aを有するリング状
の固定割型11と、前記固定割型11の両側に可動自在
に設けられ、合せ素板ガラス1の深曲げ部に対応した曲
げ成形面12aを有し、この曲げ成形面12aがセット
位置において固定割型11の曲げ成形面11aに連なる
リング状の可動割型12とで構成される。そして、上記
固定割型11は支柱13を介して台車26上に固定され
る一方、上記可動割型12の幅方向両側部は台車26上
の固定ブラケット14上に立設した支柱15の先端部に
枢軸16を介して揺動自在に支承されている。更に、上
記可動割型12の支持部には可動割型12が固定割型1
1に連なるセット位置側に付勢されるようにバランスウ
ェイト17がモーメントアーム18を介して取付けられ
ている。なお、第2図において(a)は平らな合せ素板
ガラスが曲げ型に載置された状態で、合せ素板ガラスの
加熱前を示すものであり、第2図の(b)は合せ素板ガ
ラスの曲げ加工終了状態を示すものである。又、第2図
の(c)はこの曲げ型の割状態を説明するための平面該
略図である。又、上記可動割型としては、自重で固定割
型に連なる方向へ向かい、固定割型に連なるセット位置
で停止するものであれば適宜設計変更して差支えなく、
可動割型のセット位置への復帰力については可動割型自
体の構成部材やウェイトによって調整することができる
。The bending die for self-weight bending illustrated in FIG. 2 is of a split die type, and is placed on a trolley 26 of a conveyance means, and the bending die shown in FIG. A ring-shaped fixed split mold 11 having a bending surface 11a corresponding to the central curved portion, and bending surfaces 12a movably provided on both sides of the fixed split mold 11 and corresponding to the deep bending portion of the laminated blank glass 1. and a ring-shaped movable mold 12 whose bending surface 12a is connected to the bending surface 11a of the fixed mold 11 at the set position. While being fixed on the truck 26, both sides of the movable split mold 12 in the width direction are swingably supported via a pivot 16 at the tip of a support 15 erected on a fixed bracket 14 on the truck 26. Further, the movable split mold 12 is connected to the fixed split mold 1 at the supporting part of the movable split mold 12.
A balance weight 17 is attached via a moment arm 18 so as to be biased toward the set position connected to 1. In addition, in Fig. 2, (a) shows the flat laminated blank glass placed on the bending mold before heating the laminated blank glass, and Fig. 2 (b) shows the laminated blank glass before heating. This shows the state in which the bending process has been completed. FIG. 2(c) is a schematic plan view for explaining the split state of this bending die. In addition, as the movable split mold, as long as it moves in the direction connected to the fixed split mold by its own weight and stops at the set position connected to the fixed split mold, the design may be changed as appropriate.
The return force of the movable split mold to the set position can be adjusted by the components and weights of the movable split mold itself.
なお、曲げ型の合せ素板ガラスの成形対象深曲げ部に対
応する可動割型、又は割なしタイプの場合には固定型の
周縁の合せ素板ガラスの側縁の外方には、第2.3.1
3図の様に曲げ型の端部かも突出する合せ素板ガラスの
周辺の彎曲形状に応じたテーパー角を有するテーパーリ
ング40を付設するのが好ましい。あるいは又、型自身
の周縁を端部から突出させる様な構造としてもよい。こ
のテーパーリング40又は、型の周縁の突出部の合せ素
板ガラスの端部の下面との接触面は所望の合せガラスの
設計形状と合致した成形面を持ち、プレス成形時、合せ
素板ガラスの端部な所望の形状に成形される様に支゛承
する様な形状となっている。従って、二枚の合せ素板ガ
ラスのの曲げ型上での自重曲げによる仮成形時には、第
13図のように合せ素板ガラスの90.91の端部のみ
がテーバリングの支持面に接し、合せ素板ガラスの91
の下面とテーパーリング40の成形面42との間には間
隙があいた状態で支持され、仮成形時の曲げ型12の成
形面43及びテーパリング40の成形面42との接触に
よる合せ素板ガラスの下面の端部より内側の聖跡の発生
を防止することができる。その後補助プレス部材52に
よる合せ素板ガラスのの周辺部のプレスによって、その
周辺部がテーパーリング40の成形面42及び曲げ型1
2の端部の成形面43に合致した所望の形状が得られる
。このテーパーリング40又は型の周縁の突出部は、曲
げ型の必要な深曲げ相当部に設ければよいものであり、
曲げ型の側部全体に必ずしも設ける必要はない。In addition, on the outside of the side edge of the movable split mold corresponding to the deep bending part to be formed of the laminated blank glass of the bending mold, or in the case of the non-split type, the peripheral edge of the fixed mold, No. 2.3 is installed. .1
As shown in FIG. 3, it is preferable to attach a taper ring 40 having a taper angle corresponding to the curved shape of the periphery of the laminated blank glass that protrudes from the end of the bending die. Alternatively, a structure may be adopted in which the peripheral edge of the mold itself protrudes from the end. This taper ring 40 or the contact surface of the protrusion on the periphery of the mold with the lower surface of the end of the laminated blank glass has a forming surface that matches the design shape of the desired laminated glass, and during press molding, the end of the laminated blank glass The shape is such that it can be molded into a desired shape. Therefore, when temporarily forming two pieces of laminated raw glass by bending under their own weight on a bending die, only the 90.91 end of the laminated raw glass comes into contact with the support surface of the tabering, as shown in Figure 13, and the laminated raw glass 91 of
It is supported with a gap between the lower surface and the forming surface 42 of the taper ring 40, and the laminated base glass is It is possible to prevent the occurrence of holy spots on the inner side of the edge of the lower surface. Thereafter, by pressing the peripheral part of the laminated blank glass by the auxiliary press member 52, the peripheral part is formed into the forming surface 42 of the tapered ring 40 and the bending mold 1.
A desired shape matching the molding surface 43 of the end portion of 2 is obtained. This tapered ring 40 or the protruding portion on the periphery of the mold may be provided at a portion of the bending mold that corresponds to the necessary deep bending.
It does not necessarily have to be provided on the entire side of the bending die.
プレス処理ステージST2において深曲げ部分をプレス
成形する際、上記した様な固定割型と可動割型とを備え
た曲げ型により自重曲げにより仮成形した後、この曲げ
型から第3図の様な合せ素板ガラス1の深曲げ部に対応
した曲げ成形面41を有するリング状の型を有する固定
タイプ、即ち割なしタイプの曲げ型42に移し換え、こ
の曲げ型42上で2枚の重ねられた合せ素板ガラス1を
プレス成形してもよい。第2図の様な割型タイプの曲げ
型に載せられた合せ素板ガラスの深曲げ部分をプレス成
形する場合、プレス成形時に可動割型が跳ね上がり、合
せ素板ガラスが局部変形することがあるが、第3図の様
な固定タイプの曲げ型を使用して深曲げ部分をプレス成
形すれば、上記した様な跳ね上がりを防ぐことができる
。When press-forming a deep bent part in press processing stage ST2, after preliminary forming by self-weight bending using a bending die equipped with a fixed split die and a movable split die as described above, a shape as shown in Fig. 3 is formed from this bending die. The laminated base glass 1 was transferred to a fixed type, that is, a non-split type bending die 42 having a ring-shaped die having a bending surface 41 corresponding to the deep bending part, and two stacked sheets were placed on this bending die 42. The laminated base glass 1 may be press-molded. When press-forming a deeply bent part of laminated blank glass placed on a split type bending die as shown in Figure 2, the movable split die may jump up during press forming, causing local deformation of the laminated blank glass. If the deeply bent portion is press-formed using a fixed type bending die as shown in FIG. 3, the above-mentioned springing up can be prevented.
なお、割型タイプの曲げ型を使用する場合、プレス成形
時の深曲げ部分の可動割型の跳ね上がりを防止するため
、可動割型の跳ね上がり防止装置を付設するのが好まし
い。In addition, when using a split mold type bending mold, in order to prevent the movable split mold from jumping up in the deep bending portion during press molding, it is preferable to attach a device for preventing the movable split mold from jumping up.
跳ね上がり防止装置としては、補助プレス手段30によ
る押圧動作に支障を与えない範囲でプレス処理ステージ
にて曲げ型1oの可動割型12をセット位置に固定し得
るものであれば適宜設計変更して差支えな(、クランプ
箇所、数についても適宜選択することができる。As the bounce-up prevention device, the design may be changed as appropriate as long as it can fix the movable split die 12 of the bending die 1o at the set position on the press processing stage within a range that does not interfere with the pressing operation by the auxiliary press means 30. (The location and number of clamps can also be selected as appropriate.
第4.5図に示した例は、可動割型の跳ね上がり防止装
置を設けた合せ素板ガラスの仮成形後のプレス成形装置
の一例を示したものであり、曲げ型50の可動割型51
の周辺部に、補助プレス部材52により合せ素板ガラス
53をプレス成形する時、可動割型51が二枚の合せ素
板ガラス53を所望の曲げ形状を確保するために最適な
位置で固定され、跳ね上がらない様に、可動割型係止部
材54が設けられたものである。この係止部材54は連
結アーム55が接続されており、この連結アーム55は
台車56に取付けられたブラケット57とヒンジ58に
より連結されており、又この連結アーム55の他端には
係合部59が設けられている。そして、補助プレス手段
6oの下降時、補助プレス手段52に設けられた係合部
59の押し下げ部材60が下降し補助プレス部材52が
合せ素板ガラス53の深曲げ部が接触するのに先立って
係合部59に当接した押し下げ部材60が連結アーム5
5の係合部59を押し下げ、ヒンジ58を中心にして連
結アーム55の係止部材54が上昇し、可動割型51が
固定され、補助プレス部材52による合せ素板ガラスの
深曲げ部のプレス加工時、可動割型51が動かない様に
される。補助プレス部材52による深曲げ部のプレス加
工が終了した後、補助プレス手段60の上昇に伴なって
連結アーム55の係合部59と押し下げ部材60との当
接が解放され、係上部材54と可動割型51との係止が
外れて、可動割型の固定が解除される様になっている。The example shown in FIG. 4.5 shows an example of a press forming apparatus after temporary forming of laminated blank glass, which is equipped with a device to prevent the movable split mold from jumping up.
When the auxiliary press member 52 press-forms the laminated blank glass 53 around the periphery of the glass, the movable split die 51 fixes the two laminated blank glasses 53 at an optimal position to ensure the desired bending shape, and prevents the two laminated blank glasses 53 from jumping up. A movable split type locking member 54 is provided to prevent this. A connecting arm 55 is connected to this locking member 54, and this connecting arm 55 is connected to a bracket 57 attached to a trolley 56 by a hinge 58, and the other end of this connecting arm 55 has an engaging portion. 59 are provided. When the auxiliary press means 6o descends, the push-down member 60 of the engaging portion 59 provided on the auxiliary press means 52 descends, and the auxiliary press member 52 engages before the deeply bent portion of the laminated blank glass 53 comes into contact. The push-down member 60 in contact with the joining part 59 is connected to the connecting arm 5.
5, the locking member 54 of the connecting arm 55 rises around the hinge 58, the movable split die 51 is fixed, and the auxiliary press member 52 presses the deep bent portion of the laminated blank glass. At this time, the movable split mold 51 is prevented from moving. After the pressing of the deep bending part by the auxiliary press member 52 is completed, the contact between the engaging part 59 of the connecting arm 55 and the push-down member 60 is released as the auxiliary press means 60 rises, and the engaging member 54 The movable split mold 51 is disengaged from the movable split mold 51, and the movable split mold is released from being fixed.
又、補助プレス手段は、第4図の様に、曲げ型50の合
せ素板ガラス53の深曲げ部62に対応した部分の上方
の所望位置に補助プレス部材52が設けられており、こ
の補助プレス部材52はプレス基台63に支持アーム6
4を介して取付けられている。このプレス基台63はプ
レス用シリンダー65により上下に進退し、プレス用シ
リンダー65の下降時、合せ素板ガラス53の深曲げ部
をプレス成形し、プレス用シリンダー65の上昇に伴な
いプレスが解放される様になっている。補助プレス部材
52が合せ素板ガラス53の深曲げ部62をプレスする
時、プレスによる合せ素板ガラスのしわ、傷、プレス跡
の発生が少なくなる様に、補助プレス部材52と合せ素
板ガラス53の接触部分において法線方向となる様にプ
レスするのがより好ましい。The auxiliary press means, as shown in FIG. The member 52 is attached to the support arm 6 on the press base 63.
It is attached via 4. This press base 63 is moved up and down by a press cylinder 65, and when the press cylinder 65 descends, the deeply bent portion of the laminated blank glass 53 is press-formed, and as the press cylinder 65 rises, the press is released. It looks like this. When the auxiliary press member 52 presses the deep bent portion 62 of the laminated blank glass 53, the auxiliary press member 52 and the laminated blank glass 53 are brought into contact so that wrinkles, scratches, and press marks on the laminated blank glass due to pressing are reduced. It is more preferable to press in a direction normal to the part.
上記した補助プレス部材は、合せ素板ガラスをプレス成
形した時、合せ素板ガラスにプレス跡が発生するのを防
ぐために補助プレス部材のガラスとの接触面を覆ってガ
ラス繊維、シリカ繊維、その他セラミック繊維、金属繊
維等の断熱布70を設けるのが好ましい。The above-mentioned auxiliary press member is made of glass fiber, silica fiber, or other ceramic fiber that covers the contact surface of the auxiliary press member with the glass to prevent press marks from forming on the laminated base glass when the laminated base glass is press-formed. , it is preferable to provide a heat insulating cloth 70 such as metal fiber.
第7〜9図に示した例は、2枚重ねられた合せ素板ガラ
ス80を割型タイプの曲げ型81に載置し、自重曲げに
より合せ素板ガラス80を曲げ加工、する際、合せ素板
ガラス80の深曲げ部82の曲げ加工がより容易となる
様に、深曲げ部に対応する部位の合せ素板ガラス80の
上方に局部加熱ヒーター83を設けた例である。この局
部加熱ヒーターを利用して合せ素板ガラス80の深曲げ
部分を他の部分よりもより高温、例えば10℃〜100
℃程度高くすることにより深曲げ部の自重による曲げ加
工が容易となる。かかる局部加熱ヒーターは2枚の重ね
られた合せ素板ガラスの上方に配してもよいし、下方に
配してもよいし、あるいは又上下の両方に配してもよい
。又局部加熱ヒーターの形状は所望の曲げ加工する深曲
げ部の形状に応じて適宜決定されるものであり、長さ方
向に直線状であってもよいし、あるいは又深曲げ部の折
れ線が湾曲状となる様に湾曲状となったものであっても
よ(、あるいは又更に複雑な形状であってもよい。第7
.8図に示した例は後者の例である。In the example shown in FIGS. 7 to 9, two stacked laminated blank glass sheets 80 are placed on a split-type bending die 81, and when bending the laminated blank glass sheets 80 by self-weight bending, the laminated blank glass sheets 80 are This is an example in which a local heating heater 83 is provided above the laminated blank glass 80 at a portion corresponding to the deep bending part 80 so that the bending process of the deep bending part 82 of 80 becomes easier. Using this local heating heater, the deeply bent part of the laminated blank glass 80 is heated to a higher temperature than other parts, for example, 10°C to 100°C.
By increasing the temperature by approximately ℃, it becomes easier to bend the deep bent portion using its own weight. Such local heating heaters may be placed above or below the two stacked laminated glass sheets, or may be placed both above and below the laminated glass sheets. The shape of the local heating heater is appropriately determined depending on the desired shape of the deep bending part to be bent, and may be straight in the length direction, or the bending line of the deep bending part may be curved. It may be curved so as to form a shape (or it may be a more complicated shape. Seventh
.. The example shown in Figure 8 is the latter example.
又、局部加熱ヒーターによる合せ素板ガラスの局部加熱
時、局部加熱が他の部分に及ばない様にしたい時には、
第9図の様に、耐熱性の遮熱カーテンや遮熱板などの遮
熱部材84を所望の部分に配し、局部加熱ヒーター83
による好ましくない放射熱をカットすることもできる。Also, when heating a laminated base glass locally using a local heating heater, if you want to prevent the local heating from reaching other parts,
As shown in FIG. 9, a heat shield member 84 such as a heat-resistant heat shield curtain or heat shield plate is placed in a desired area, and a local heating heater 83 is placed.
It can also cut unwanted radiant heat.
本発明の方法において、第12図の様に曲げ成形される
合せ素板ガラスのプレス成形し、深曲げする(折り曲げ
線94を含む)部分を含む周辺部に、着色セラミックカ
ラーインクをプリントし、着色帯を形成することもでき
る。この様にプレス成形の部位に着色セラミックカラー
インクのプリントが施こされ、プレス成形前の加熱工程
において合せ素板ガラスの表面に焼付られていると、た
とえプレス時、着色セラミックカラーインクの焼付は着
色帯又は合せ素板ガラスの周辺部にプレス跡、プレス傷
が発生したとしても着色セラミックカラーインクの焼付
は着色帯によりプレス跡やプレス傷が自立だな(なり、
外観上の光学的欠点を隠蔽することができる。In the method of the present invention, a laminated blank glass sheet to be bent and formed is press-formed as shown in FIG. It is also possible to form bands. In this way, if colored ceramic color ink is printed on the press-formed area and baked onto the surface of the laminated glass in the heating process before press-forming, even if the colored ceramic color ink is printed during pressing, it will not be colored. Even if there are press marks or scratches on the periphery of the band or laminated glass, the colored ceramic color ink will not be baked on due to the colored band.
Optical defects in appearance can be hidden.
なお、第10図の様に、2枚重ねられた合せ素板ガラス
90.91のうち上側の合せ素板ガラス9゜の深曲げ部
分の上面に着色セラミックカラーインクがプリントされ
着色帯92が形成されている場合、着色セラミックカラ
ーインクがプレス時、補助プレス部材のプレス面に被覆
された耐熱布に付着し、耐熱布の寿命を低下させたり、
あるいは着色セラミックカラーインクの焼付は着色帯の
表面にプレス跡が発生する。これを防ぐために、着色セ
ラミックカラーインクのプリント面に耐熱性の離型剤を
プリントし、離型剤層93を形成し、プレス成形時の着
色セラミックカラーインクの焼付は着色帯と補助プレス
部材の耐熱布との離型性を良好にすることができる。か
かる耐熱性の離型剤としては、窒化ホウ素やカーボンな
どが挙げられる。As shown in FIG. 10, colored ceramic color ink is printed on the upper surface of the deeply bent portion of the upper laminated glass 90.91 of the two stacked laminated blank glasses 90, 91 to form a colored band 92. If there is, the colored ceramic color ink may adhere to the heat-resistant cloth covering the press surface of the auxiliary press member during pressing, reducing the life of the heat-resistant cloth, or
Alternatively, baking of colored ceramic color ink causes press marks on the surface of the colored band. In order to prevent this, a heat-resistant mold release agent is printed on the printed surface of the colored ceramic color ink to form a mold release agent layer 93, and the colored ceramic color ink is baked during press molding between the colored band and the auxiliary press member. Good releasability from heat-resistant cloth can be achieved. Examples of such heat-resistant mold release agents include boron nitride and carbon.
あるいは又、上記した様な補助プレス部材に被覆される
耐熱布の寿命向上の改善として、あるいは着色セラミッ
クカラーインクの焼付は着色帯のプレス面の改善のため
、第11図の様に2枚の重ねられた合せ素板ガラス90
.91を自重曲げにより予備成形した後、プレス成形に
先立つて上下の合せ素板ガラス90.91を逆転させ、
着色セラミックカラーインクの焼付は着色帯92の形成
された合せ素板ガラス90を下側とし、かかる着色帯の
施こされていない合せ素板ガラス91の周辺部をプレス
成形する様にし、着色セラミックカラーインクが耐熱布
に付着するのを防止する様にすることもできる。Alternatively, as an improvement to extend the life of the heat-resistant cloth covered with the auxiliary press member as described above, or to improve the pressing surface of the colored band by baking the colored ceramic color ink, two pieces of cloth may be used as shown in Fig. 11. Laminated laminated glass 90
.. After preforming 91 by gravity bending, the upper and lower laminated glass plates 90 and 91 are reversed before press forming.
The colored ceramic color ink is baked by placing the laminated blank glass 90 on which the colored band 92 is formed on the lower side, press-molding the peripheral part of the laminated blank glass 91 where the colored band is not applied, and applying the colored ceramic color ink. It is also possible to prevent the heat-resistant cloth from adhering to the heat-resistant cloth.
[発明の効果]
以上説明してきたように、本発明の合せガラスの曲げ成
形方法及びその装置によれば合せガラス用のガラス板を
ガラス軟化温度まで加熱して自重曲げ法により曲げ型に
略沿った形状に仮成形した後、合せ素板ガラスの不完全
成形箇所を部分的プレスによって矯正するようにしたの
で、合せガラスの側部の深曲げ度合が大きいものであっ
ても、合せガラスの側部を確実に深曲げ成形することが
でき、合せ素板ガラスの成形形状の自由度を高めること
ができる。[Effects of the Invention] As explained above, according to the laminated glass bending method and apparatus of the present invention, a glass plate for laminated glass is heated to the glass softening temperature and then bent approximately along the bending mold by the self-weight bending method. After the laminated glass is temporarily formed into the desired shape, imperfectly formed parts of the laminated blank glass are corrected by partial pressing, so even if the sides of the laminated glass are deeply bent, can be reliably deep bent and formed, increasing the degree of freedom in shaping the shape of the laminated blank glass.
又、本発明の一態様において、曲げ型に載置された2枚
の重ねられた合せ素板ガラスの両側の端末部を更に曲げ
型の外方に隣接して設けられたテーパーリング型で受け
る様にすれば、2枚の重ねられた合せ素板ガラスの深曲
げ部を局部加熱ヒーターにより他の部分よりもより局部
加熱し、自重曲げ成形し、更に局部加熱部分をその上部
から補助プレス部材でプレスすることにより、2枚の合
せ素板ガラスの側縁部を所望の曲率半径を持って曲げ成
形することができる。例えば自重曲げ後、プレス成形し
ない場合には、2枚の合せ素板ガラスの側縁部を600
〜10000 mmHの曲率半径を持って曲げ成形する
のがほぼ限度であったが、上記の様にその後側縁部をプ
レス成形することにより80〜200mmR程度の曲率
半径を持った曲げ加工までできる様になった。又上記テ
ーパーリング型で2枚の合せ素板ガラスの側部の端末部
を支持するため、従来の様に2枚の合せ素板ガラスを曲
げ型の端部から約4 mm−10mm程度突出させた場
合に合せ素板ガラスの下面の端部の曲げ型のリングの成
形面との接触部に生ずる曲げ聖跡をなくすことができる
。Further, in one aspect of the present invention, the end portions on both sides of the two stacked laminated glass sheets placed on the bending die are further received by a tapered ring die provided adjacent to the outside of the bending die. In this case, the deeply bent part of two stacked laminated glass sheets is heated more locally than other parts by a local heating heater, bent under its own weight, and then the locally heated part is pressed from above with an auxiliary press member. By doing so, the side edges of the two laminated glass sheets can be bent to have a desired radius of curvature. For example, if press forming is not performed after bending under its own weight, the side edges of two laminated glass sheets should be
It was almost the limit to bend with a radius of curvature of ~10,000 mmH, but by press-forming the rear side edge as described above, it is now possible to bend with a radius of curvature of about 80 to 200 mmR. Became. In addition, in order to support the side end portions of the two laminated blank glass sheets using the taper ring mold, as in the conventional case, the two laminated blank glass sheets are made to protrude approximately 4 mm to 10 mm from the end of the bending mold. It is possible to eliminate bending marks that occur at the contact portion of the lower end of the blank glass with the molding surface of the ring of the bending mold.
又、本発明によれば、合せガラス用の合せ素板ガラスを
所望の曲率を持った深曲げ加工する際、従来オーバーサ
イズ加工方法という複雑な工程を経なければならないと
いう問題点があったが、本発明によれば、得ようとする
合せガラスの形状と一致する寸法に切断された合せ素板
ガラスを使用することにより、所望の周縁部の曲率を持
った深曲げ加工の合せガラスを得ることができ、かかる
形状の合せガラスの製造を容易にし、かつコスト低減が
できる。Further, according to the present invention, when deep bending a laminated base glass for laminated glass to a desired curvature, there was a problem that conventionally, a complicated process called an oversize processing method had to be performed. According to the present invention, by using laminated blank glass cut into dimensions that match the shape of the desired laminated glass, it is possible to obtain deeply bent laminated glass having a desired peripheral edge curvature. This makes it possible to easily manufacture laminated glass having such a shape and to reduce costs.
又、本発明の一実施例態様において、合せ素板ガラスの
補助プレス部材によりプレス成形する深曲げ部分に着色
セラミックカラーインクがプリントされている場合には
、補助プレス部材により合せ素板ガラス表面、あるいは
着色セラミ−ツクカラーインクの焼付は着色帯面にプレ
ス跡がたとえついたとしても、この着色セラミックカラ
ーインクの焼付は着色帯により自立だな(なるので透視
上の光学的な欠点とならないというメリットがある。Furthermore, in one embodiment of the present invention, if colored ceramic color ink is printed on the deep bent portion of the laminated blank glass to be press-formed by the auxiliary press member, the auxiliary press member may print the surface of the laminated blank glass or the colored ceramic color ink. Even if there are press marks on the surface of the colored band, the printing of the ceramic color ink is self-supporting due to the colored band (this has the advantage of not causing any optical defects when viewed through fluoroscopy). be.
第1図は、本発明に係る合せガラス用の合せ素板ガラス
の曲げ成形装置の一実施例を組み込んだ合せ素板ガラス
の曲げ成形システムを示す概略説明図、第2〜6.13
図は本発明の実施例に係る合せガラス用の合せ素板ガラ
スの曲げ成形装置の全体ないし部分的な概略説明図、第
7〜9図は合せ素板ガラスの局部加熱方法を示すための
概略説明図、第10〜12図は本発明の方法の一実施態
様を示すための説明図を示す。
1.53,80,90,91 :合せ素板ガラス2 :
加熱・曲げ加工部
10.42,50,81 :曲げ型
12.51 :可動割型
11:固定割型
30:補助プレス手段
40:テーバ−リング
52:補助プレス部材 70:耐熱布92:着色セラ
ミックカラーインクの着色帯第
図
(b)
第
図
第
図
第
図
/U
第
図
6]
(a)
第
図
第
図
(b)FIG. 1 is a schematic explanatory diagram showing a bending and forming system for laminated blank glass incorporating an embodiment of the bending and forming apparatus for laminated blank glass for laminated glass according to the present invention;
The figure is an overall or partial schematic explanatory diagram of a bending and forming apparatus for laminated blank glass for laminated glass according to an embodiment of the present invention, and FIGS. 7 to 9 are schematic explanatory diagrams showing a local heating method for laminated blank glass. , and FIGS. 10 to 12 show explanatory diagrams for illustrating one embodiment of the method of the present invention. 1.53,80,90,91: Laminated plain glass 2:
Heating/bending section 10.42, 50, 81: Bending die 12.51: Movable split die 11: Fixed split die 30: Auxiliary press means 40: Taber ring 52: Auxiliary press member 70: Heat-resistant cloth 92: Colored ceramic Colored band of color ink (b) Figure / U Figure 6] (a) Figure (b)
Claims (7)
合せ素板ガラスの側部が深曲げされるべく同時に曲げ成
形するに際し、二枚の合せ素板ガラスを所望の成形面を
有する自重曲げ加工用曲げ型に載置し、この曲げ型に載
置された二枚の合せ素板ガラスを加熱炉内の加 熱・曲げ加工処理ステージにて上記ガラスの曲げ加工温
度まで加熱するとともに、両合せ素板ガラスの側部の深
曲げする部分を局部的により高温に加熱し、二枚の合せ
素板ガラスを自重曲げ加工用曲げ型に略沿わせた形状に
自重曲げにより仮成形し、次いで直ちに二枚の重ねられ
た合せ素板ガラスの上方から合せ素板ガラスの深曲げ部
分を曲げ型に載置された状態において補助プレス部材に
より押付けて二枚の合せ素板ガラスを同時にプレス成形
することを特徴とする合せガラス用合せ素板ガラスの曲
げ成形方法。(1) When stacking two pieces of laminated raw glass for laminated glass and bending them simultaneously so that the sides of both laminated raw glasses are deeply bent, the two pieces of laminated raw glass are bent under their own weight to have the desired forming surface. The two sheets of laminated raw glass placed on this bending mold are heated to the bending temperature of the glass in the heating and bending processing stage in a heating furnace, and both laminated glass sheets are placed on a bending mold for processing. The side part of the sheet glass to be deeply bent is locally heated to a higher temperature, and the two laminated blank glass sheets are temporarily formed by gravity bending into a shape that roughly follows the bending die for gravity bending, and then the two sheets are immediately bent. A laminated glass characterized in that the deeply bent portion of the laminated blank glass is pressed from above by an auxiliary press member while it is placed on a bending die, thereby press-forming two laminated blank glasses at the same time. A method for bending and forming laminated glass.
に合せ素板ガラスの側部の所望の成形形状に対応した成
形面を上面に有するテーパーリングを設けた自重曲げ加
工用曲げ型上に二枚の合せ素板ガラスを載置し、この曲
げ型に載置された二枚の合せ素板ガラスを加熱炉内の加
熱・曲げ加工処理ステージにて上記ガラスの曲げ加工温
度まで加熱するとともに、両合せ素板ガラスの側部の深
曲げする部分を局部的により高温に加熱し、二枚の合せ
素板ガラスを自重曲げ加工用曲げ型に略沿わせた形状に
自重曲げにより仮成形し、次いで直ちに二枚の重ねられ
た合せ素板ガラスの上方から合せ素板ガラスの深曲げ部
分を曲げ型に載置された状態において補助プレス部材に
より押付けて二枚の合せ素板ガラスを同時にプレス成形
することを特徴とする合せガラス用合せ素板ガラスの曲
げ成形方法。(2) Bending for self-weight bending with a tapered ring on the side edge of the deep bending compatible part of the bending die for self-weight bending, the upper surface of which has a forming surface that corresponds to the desired molding shape of the side of the laminated blank glass. Two sheets of laminated raw glass are placed on a mold, and the two sheets of laminated raw glass placed on this bending mold are heated to the bending temperature of the glass in a heating and bending processing stage in a heating furnace. At the same time, the parts of the sides of the laminated blank glass that are to be deeply bent are locally heated to a higher temperature, and the two laminated blank glasses are temporarily formed by weight bending into a shape that roughly follows the bending die for weight bending. Next, immediately press the deeply bent portion of the laminated raw glass from above with an auxiliary press member while it is placed on the bending mold to simultaneously press-form the two laminated raw glass. Features: A method for bending and forming laminated base glass for laminated glass.
合せ素板ガラスの側部が深曲げされるべく同時に曲げ成
形するに際し、二枚の合せ素板ガラスのうち1枚は側部
の少なくとも深曲げ部に着色セラミックカラーフリット
がプリントされている合せ素板ガラスを用い、この合せ
素板ガラスをもう一枚の合せ素板ガラスの上に重ねて所
望の成形面を有する自重曲げ加工用曲げ型に載置し、こ
の曲げ型に載置された二枚の合せ素板ガラスを加熱炉内
の加熱・曲げ加工処理ステージにて上記ガラスの曲げ加
工温度まで加熱するとともに合せ素板ガラスの側部の深
曲げする部分を局部的により高温に加熱し、二枚の合せ
素板ガラスを自重曲げ加工用曲げ型に略沿わせた形状に
自重曲げにより仮成形するとともに着色セラミックカラ
ーフリットのプリント層をガラス板面に焼付け、次いで
直ちに二枚の重ねられた合せ素板ガラスの上側の合せ素
板ガラスの深曲げ部分の着色セラミックカラーフリット
の焼付けプリント層部分をその上方から上記二枚の合せ
素板ガラスが曲げ型に載置された状態において補助プレ
ス部材により押付けて二枚の合せ素板ガラスを同時にプ
レス成形することを特徴とする合せガラス用合せ素板ガ
ラスの曲げ成形方法。(3) When stacking two pieces of laminated blank glass for laminated glass and bending them simultaneously so that the sides of both laminated blank glasses are deeply bent, one of the two pieces of laminated blank glass is Using a laminated blank glass sheet with a colored ceramic color frit printed on the deep bending part, this laminated blank glass sheet is stacked on top of another laminated blank glass sheet and placed on a bending die for self-weight bending that has the desired forming surface. The two sheets of laminated blank glass placed on this bending mold are heated to the bending temperature of the glass in the heating/bending processing stage in a heating furnace, and the sides of the laminated blank glass are deeply bent. The parts are locally heated to a higher temperature, and the two laminated glass sheets are temporarily formed by gravity bending into a shape that roughly follows the bending mold for gravity bending, and a printed layer of colored ceramic color frit is baked onto the glass plate surface. Immediately, the printed layer of colored ceramic color frit on the deeply bent part of the upper laminated glass is placed on the bending mold from above. 1. A method for bending and forming laminated blank glass for laminated glass, characterized in that two sheets of laminated blank glass are press-formed at the same time by pressing with an auxiliary press member in the same state.
合せ素板ガラスの側部が深曲げされるべく同時に曲げ成
形するに際し、二枚の合せ素板ガラスのうち1枚は側部
の少なくとも深曲げ部に着色セラミックカラーフリット
がプリントされている合せ素板ガラスを用い、この合せ
素板ガラスをもう一枚の合せ素板ガラスの上に重ねて所
望の成形面を有する自重曲げ加工用曲げ型に載置し、こ
の曲げ型に載置された二枚の合せ素板ガラスを加熱炉内
の加熱・曲げ加工処理ステージにてガラス板の曲げ加工
温度まで加熱するとともに合せ素板ガラスの側部の深曲
げする部分を局部的により高温に加熱し、二枚の合せ素
板ガラスを曲げ型に略沿わせた形状に自重曲げにより仮
成形するとともに着色セラミックカラーフリットのプリ
ント層をガラス板面に焼付け、次いで二枚の重ねられた
合せ素板ガラスの上下を入れ換えて、上側にあった合せ
素板ガラスが 下側となり、このガラスの着色セラミックカラーフリッ
トの焼付けプリント層がもう一枚の合せ素板ガラスとの
重ね合せ面に位置する様に重ね換え、次いで二枚重ねら
れた合せ素板ガラスの上側の合せ素板ガラスの深曲げ部
分を曲げ型に載置された状態においてその上方から補助
プレス部材により押付けて二枚の合せ素板ガラスを同時
にプレス成形することを特徴とする合せガラス用合せ素
板ガラスの曲げ成形方法。(4) When stacking two pieces of laminated blank glass for laminated glass and bending them at the same time so that the sides of both laminated blank glasses are deeply bent, one of the two pieces of laminated blank glass should be Using a laminated blank glass sheet with a colored ceramic color frit printed on the deep bending part, this laminated blank glass sheet is stacked on top of another laminated blank glass sheet and placed on a bending die for self-weight bending that has the desired forming surface. The two sheets of laminated raw glass placed on this bending mold are heated to the bending temperature of the glass plate in the heating and bending processing stage in the heating furnace, and the sides of the laminated raw glass are deeply bent. The part is locally heated to a higher temperature, and the two pieces of laminated raw glass are temporarily formed by self-weight bending into a shape that roughly follows the bending mold, and a printed layer of colored ceramic color frit is baked on the glass plate surface. The top and bottom of the stacked laminated blank glasses are switched, and the top laminated blank glass becomes the bottom, and the printed layer of colored ceramic color frit on this glass is placed on the surface where it will overlap with the other laminated blank glass. Then, with the deep bent part of the upper laminated blank glass placed on the bending mold pressed by an auxiliary press member from above, the two laminated blank glasses are stacked. A method for bending and forming laminated blank glass for laminated glass, which is characterized by simultaneous press forming.
合せ素板ガラスの側部が深曲げされるべく同時に曲げ成
形するに際し、二枚の合せ素板ガラスを所望の成形面と
可動割型と固定割型とを有する割型タイプの自重曲げ用
曲げ型に載置し、この曲げ型に載置された二枚の合せ素
板ガラスを加熱炉内の加熱・曲げ加工処理ステージにて
上記ガラスの曲げ加工温度まで加熱するとともに、両合
せ素板ガラスの側部の深曲げする部分を局部的により高
温に加熱し、二枚の合せ素板ガラスを自重曲げ加工用曲
げ型に略沿わせた形状に自重曲げにより仮成形し、次い
で仮成形された二枚の合せ素板ガラスを上記割型タイプ
の自重曲げ用曲げ型から割なしタイプの第2の曲げ型上
に移し換え、その後直ちに二枚の重ねられた合せ素板ガ
ラスの上方から合せ素板ガラスの深曲げ部分を上記第2
の曲げ型に載置された状態において補助プレス部材によ
り押付けて二枚の合せ素板ガラスを同時にプレス成形す
ることを特徴とする合せガラス用合せ素板ガラスの曲げ
成形方法。(5) When two pieces of laminated raw glass for laminated glass are overlapped and simultaneously bent and formed so that the sides of both laminated raw glasses are deeply bent, the two pieces of laminated raw glass are aligned with the desired forming surface and the movable split mold. The two sheets of laminated blank glass placed on this bending die are placed on a split type bending die for self-weight bending which has a fixed split die and a fixed split die, and the above-mentioned glass is At the same time, the sides of the laminated blank glass are heated locally to a higher temperature to be bent deeply, and the two laminated blank glasses are shaped to roughly follow the bending die for self-weight bending. Temporarily formed by self-weight bending, then the two temporarily formed laminated blank glass sheets are transferred from the above-mentioned split type bending mold for self-weight bending onto a second non-split type bending mold, and then immediately stacked. The deeply bent part of the laminated glass from above the second laminated glass.
1. A method for bending and forming laminated blank glass for laminated glass, characterized in that two sheets of laminated blank glass are simultaneously press-formed by pressing with an auxiliary press member while placed on a bending die.
合せ素板ガラスの側部が深曲げされるべく同時に曲げ成
形する合せガラス用の合せ素板ガラスの曲げ成形装置で
あって、上記合せ素板ガラスの成形対象中間湾曲部に対
応した曲げ成形面と成形対象深曲げ部に対応した曲げ成
形面とを有する自重曲げ加工用曲げ型と、該曲げ型の上
方であって合せ素板ガラスの成形対象側方深曲げ部に対
応する部分に設けられた補助プレス部材と、該補助プレ
ス部材の昇降機構とを備えたことを特徴とする 合せガラス用合せ素板ガラスの曲げ成形装 置。(6) A bending and forming device for laminated blank glass for laminated glass, which overlaps two pieces of laminated blank glass for laminated glass and simultaneously bends and forms the sides of both laminated blank glasses so that the sides of the laminated blank glasses are deeply bent. A bending die for self-weight bending, which has a bending surface corresponding to the intermediate curved part to be formed of the blank glass and a bending surface corresponding to the deep bending part to be formed, and a bending die for forming the laminated blank glass above the bending die. 1. A bending and forming apparatus for laminated blank glass for laminated glass, characterized by comprising an auxiliary press member provided at a portion corresponding to the target lateral deep bending portion, and an elevating mechanism for the auxiliary press member.
合せ素板ガラスの側部が深曲げされるべく同時に曲げ成
形する合せガラス用の合せ素板ガラスの曲げ成形装置で
あって、上記合せ素板ガラスの成形対象中間湾曲部に対
応した曲げ成形面と成形対象深曲げ部に対応した曲げ成
形面とを有する割型タイプの自重曲げ加工用曲げ型と、
該曲げ型と隣接して配置された所望の得ようとする合せ
素板ガラスの曲げ成形面を有する上記二枚の合せ素板ガ
ラスを載置する割なしタイプの曲げ型と、該割なしタイ
プの曲げ型の上方であって合せ素板ガラスの成形対象側
方深曲げ部に対応する部分に設けられた補助プレス部材
と、該補助プレス部材の昇降機構とを備えたことを特徴
とする合せガラス用合せ素板ガラスの曲げ成形装置。(7) A bending and forming device for laminated blank glass for laminated glass, which overlaps two laminated blank glasses for laminated glass and simultaneously bends and forms the sides of both laminated blank glasses so that the side portions of the laminated blank glasses are deeply bent. A split die type bending die for self-weight bending, which has a bending surface corresponding to an intermediate curved portion to be formed of a blank glass and a bending surface corresponding to a deep bending portion to be formed;
A split type bending die on which the two sheets of laminated blank glass are placed, which has a bending surface of the desired laminated blank glass to be obtained, which is placed adjacent to the bending die, and the split type bending die. A laminated sheet for laminated glass characterized by comprising an auxiliary press member provided above the mold and corresponding to the deep lateral bending portion of the laminated base glass to be formed, and an elevating mechanism for the auxiliary press member. Equipment for bending and forming raw glass.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20308688A JPH0238332A (en) | 1988-02-25 | 1988-08-17 | Flexural forming process for laminated raw plate glass for laminated glass and unit therefor |
DE68919429T DE68919429T2 (en) | 1988-02-25 | 1989-02-24 | Method and device for bending glass sheets for laminated glass. |
US07/314,922 US4909820A (en) | 1988-02-25 | 1989-02-24 | Method of and an apparatus for bending glass plates for a laminated glass |
EP89103298A EP0338216B1 (en) | 1988-02-25 | 1989-02-24 | Method of and an apparatus for bending glass plates for a laminated glass |
US07/442,523 US5045101A (en) | 1988-02-25 | 1989-11-28 | Method of and an apparatus for bending glass plates for a laminated glass wherein side portions of two overlapping glass plates are simultaneously subjected to deep-bending |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63-40721 | 1988-02-25 | ||
JP4072188 | 1988-02-25 | ||
JP20308688A JPH0238332A (en) | 1988-02-25 | 1988-08-17 | Flexural forming process for laminated raw plate glass for laminated glass and unit therefor |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13017589A Division JPH0255239A (en) | 1989-05-25 | 1989-05-25 | Method for bending raw glass sheet for laminated glass and apparatus therefor |
JP19055989A Division JPH0251435A (en) | 1988-02-25 | 1989-07-25 | Method and apparatus for bending formation of material glass for laminated glass |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0238332A true JPH0238332A (en) | 1990-02-07 |
JPH0530770B2 JPH0530770B2 (en) | 1993-05-10 |
Family
ID=26380237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20308688A Granted JPH0238332A (en) | 1988-02-25 | 1988-08-17 | Flexural forming process for laminated raw plate glass for laminated glass and unit therefor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0238332A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5302176A (en) * | 1991-09-04 | 1994-04-12 | Nippon Sheet Glass Co., Ltd. | Method of and apparatus for bending sheet glass |
WO2003076353A1 (en) * | 2002-03-13 | 2003-09-18 | Asahi Glass Company, Limited | Method of bend molding glass plate and apparatus |
JP2005051865A (en) * | 2003-07-30 | 2005-02-24 | Toshiba Elevator Co Ltd | Motor drive controller for elevator |
WO2006001474A1 (en) * | 2004-06-29 | 2006-01-05 | Asahi Glass Company, Limited | Production method and production device for laminated glass |
JP2011079692A (en) * | 2009-10-06 | 2011-04-21 | Central Glass Co Ltd | Apparatus and method for preliminary bonding of laminated glass |
WO2016067829A1 (en) * | 2014-10-31 | 2016-05-06 | 日本電気硝子株式会社 | Curved plate glass molding method |
-
1988
- 1988-08-17 JP JP20308688A patent/JPH0238332A/en active Granted
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5302176A (en) * | 1991-09-04 | 1994-04-12 | Nippon Sheet Glass Co., Ltd. | Method of and apparatus for bending sheet glass |
WO2003076353A1 (en) * | 2002-03-13 | 2003-09-18 | Asahi Glass Company, Limited | Method of bend molding glass plate and apparatus |
US7401476B2 (en) | 2002-03-13 | 2008-07-22 | Asahi Glass Company, Limited | Method and apparatus for bending a glass sheet |
US8387414B2 (en) | 2002-03-13 | 2013-03-05 | Asahi Glass Company, Limited | Method and apparatus for bending a glass sheet |
JP2005051865A (en) * | 2003-07-30 | 2005-02-24 | Toshiba Elevator Co Ltd | Motor drive controller for elevator |
WO2006001474A1 (en) * | 2004-06-29 | 2006-01-05 | Asahi Glass Company, Limited | Production method and production device for laminated glass |
US7775068B2 (en) | 2004-06-29 | 2010-08-17 | Asahi Glass Company, Limited | Production method and production device for laminated glass |
JP4807515B2 (en) * | 2004-06-29 | 2011-11-02 | 旭硝子株式会社 | Laminated glass manufacturing method and manufacturing apparatus |
JP2011079692A (en) * | 2009-10-06 | 2011-04-21 | Central Glass Co Ltd | Apparatus and method for preliminary bonding of laminated glass |
WO2016067829A1 (en) * | 2014-10-31 | 2016-05-06 | 日本電気硝子株式会社 | Curved plate glass molding method |
JPWO2016067829A1 (en) * | 2014-10-31 | 2017-08-10 | 日本電気硝子株式会社 | Method for forming curved plate glass |
Also Published As
Publication number | Publication date |
---|---|
JPH0530770B2 (en) | 1993-05-10 |
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