JP2001158630A - Air nozzle for molding glass plate and method for curving and molding with the air nozzle - Google Patents
Air nozzle for molding glass plate and method for curving and molding with the air nozzleInfo
- Publication number
- JP2001158630A JP2001158630A JP33989899A JP33989899A JP2001158630A JP 2001158630 A JP2001158630 A JP 2001158630A JP 33989899 A JP33989899 A JP 33989899A JP 33989899 A JP33989899 A JP 33989899A JP 2001158630 A JP2001158630 A JP 2001158630A
- Authority
- JP
- Japan
- Prior art keywords
- air
- cylindrical portion
- diameter cylindrical
- glass plate
- air nozzle
- 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
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/035—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、加熱したガラス板
の下面に高温のジェットエア流を吹き付けて浮上させ、
曲げ型下面に押しつけてガラス板を曲げ成形させるエア
ノズル、および該エアノズルを用いてガラス板を曲げ成
形する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of blowing a high-temperature jet air stream onto a lower surface of a heated glass sheet to float the glass sheet.
TECHNICAL FIELD The present invention relates to an air nozzle for bending a glass plate by pressing it against a lower surface of a bending die, and a method for bending a glass plate using the air nozzle.
【０００２】[0002]
【従来の技術】車両用の窓ガラスは車体形状とのマッチ
ングを図るために湾曲していることが多く、一般的には
この様な窓ガラスを成形する方法としては、曲率を有し
た耐火物上を搬送しながら曲げるガスハース法や、ガラ
ス板を吊り具により支持して軟化温度付近まで加熱後プ
レス型で成形するプレス法、或いは加熱炉内で軟化させ
たガラス板をジェットエアーによって浮上させ、曲げ型
に押しつけて曲げ成形するクイックサグベンド法と呼ば
れている方法等が知られている。2. Description of the Related Art A window glass for a vehicle is often curved in order to match a shape of a vehicle body. Generally, a method of forming such a window glass is to use a refractory having a curvature. The gas hearth method of bending while transporting the top, the press method of forming a glass plate with a press mold after heating the glass plate to near the softening temperature by supporting it with a hanging tool, or floating the glass plate softened in a heating furnace by jet air, There is known a method called a quick sag bend method in which a sheet is pressed against a bending mold and bent.
【０００３】上記各種方法の内、クイックサグベンド法
は、後部窓ガラスやサイド窓ガラスを製造する場合に良
く用いられ、さらに詳述すれば、加熱炉内を搬送ロール
によってガラス板を搬送しながら加熱軟化させ、加熱炉
内の上部の曲げ型のある所定位置で停止させたフラット
なガラス板を、搬送ロールの下方に配したエアノズルよ
り上方に向けて噴射する高温のジェットエアーによって
浮上させて、軟化したガラス板をその上部に配した曲げ
型の下面の湾曲面に押しつけて曲げ成形させる方法であ
る。[0003] Of the above-mentioned various methods, the quick sag bend method is often used when manufacturing a rear window glass or a side window glass. More specifically, a quick sag bend method is performed while a glass sheet is transported by a transport roll in a heating furnace. Heated and softened, a flat glass plate stopped at a predetermined position with a bending mold in the upper part of the heating furnace is floated by high-temperature jet air that is jetted upward from an air nozzle arranged below the transport roll, This is a method in which a softened glass plate is pressed against a curved surface of a lower surface of a bending die disposed on an upper portion thereof to bend and form.
【０００４】ガラス板を浮上させる上記エアノズルとし
ては、従来より直噴型ノズルやアスピレータ型ノズルと
呼ばれるエアノズルが良く用いられていた。As the air nozzle for floating the glass plate, an air nozzle called a direct injection type nozzle or an aspirator type nozzle has been often used.
【０００５】前記直噴型ノズルは円筒状の先端がテーパ
ー状に細くなっており、その中心からジェットエアを噴
射させるものである。The direct injection nozzle has a tapered cylindrical tip, and jets jet air from its center.
【０００６】また、アスピレータ型ノズルは、図７に示
すように、外形形状として先端側をテーパー形状とした
小径テーパー部４１の雌ねじ部４２ａと大径円柱部４３
の中央突起部４４の外周に設けた雄ねじ部４４ａを螺合
させたものであり、該大径円柱部４３の外周の端部に設
けた円筒状の外周突起部４７の内周面と、前記小径テー
パー部４１の外周面間の円形状の隙間を大径円柱部４３
内のエア導入路４５とエア連通孔４６を介して連通させ
たノズル４０である。Further, as shown in FIG. 7, the aspirator type nozzle has a female threaded portion 42a and a large-diameter cylindrical portion 43 of a small-diameter tapered portion 41 having a tapered distal end as an outer shape.
An external thread portion 44a provided on the outer periphery of the central projection portion 44 is screwed together, and an inner peripheral surface of a cylindrical outer periphery projection portion 47 provided on an outer peripheral end of the large-diameter cylindrical portion 43; The circular gap between the outer peripheral surfaces of the small diameter taper portion 41 is
The nozzle 40 communicates with the air introduction passage 45 in the inside through the air communication hole 46.
【０００７】[0007]
【発明が解決しようとする課題】クイックサグベンド法
によってガラス板を曲げ成形する場合、エアノズルから
上方に向けて噴射されるジェットエアによって、ガラス
板を曲げ型の下面に押し付けた時に、ガラス板とエアノ
ズル間にはガラス板を搬送するための複数本の搬送ロー
ルが設けられているために、搬送ロールの下方に設けた
ノズルから噴射したジェットエアによってガラス板を浮
上かつ曲げ型に押し付けようとすれば、必然的にジェッ
トエアは搬送ロール間をすり抜けて上方に噴射されるこ
とになる。When a glass sheet is bent by the quick sag bend method, when the glass sheet is pressed against the lower surface of a bending mold by jet air jetted upward from an air nozzle, the glass sheet is bent. Since a plurality of transport rolls for transporting the glass sheet are provided between the air nozzles, the glass sheet floats and is pressed against the bending mold by the jet air jetted from the nozzle provided below the transport roll. In this case, the jet air inevitably passes through between the transport rolls and is jetted upward.
【０００８】この場合に、ガラス板の下面に噴射される
ジェットエアーの圧力分布は、ガラス板の周端辺の一部
の辺が搬送ロールと交差するような位置関係となる場合
に、その搬送ロールと交差するガラス板の端辺近傍にお
いて、搬送ロールによってジェットエアのガラス面への
噴射圧力がばらつき、均一とならない場合があり、ガラ
ス板を比較的所望の形状近くに曲げ成形できるものの、
該ガラス板の周辺と搬送ロールの長手方向とが交差する
部分に若干光学歪み等の発生する場合が見受けられた。In this case, the pressure distribution of the jet air jetted to the lower surface of the glass plate is such that when a part of the peripheral edge of the glass plate has a positional relationship such that it intersects with the transport roll, the transport is In the vicinity of the edge of the glass plate that intersects with the roll, the jet pressure of the jet air on the glass surface varies depending on the transport roll, and may not be uniform, although the glass plate can be bent relatively close to the desired shape,
Some optical distortion or the like was observed at a portion where the periphery of the glass plate and the longitudinal direction of the transport roll intersect.
【０００９】一方、車両用の後部窓ガラス等を曲げ成形
する場合は、通常、図８に示されるように、略台形状の
該ガラス板１の上辺と下辺が搬送ロール５の長手方向と
交差することになり、ガラス板１の両翼のウイングと呼
ばれる部分の曲げ深さが深いので、曲げ型に沿って該ガ
ラス板１の両翼部分が湾曲するに従ってエアノズルから
遠ざかり、遠ざかった状態でもジェットエアが充分にガ
ラス面に分布するように、ガラス板の両翼部分の搬送ロ
ール５を１本程度取り外し、さらにエアノズル４０、４
０・・の間隔を狭めて本数を増やす等の対策を行ってい
た。On the other hand, when bending a rear window glass or the like for a vehicle, the upper and lower sides of the substantially trapezoidal glass plate 1 intersect with the longitudinal direction of the transport roll 5 as shown in FIG. Since the bending depth of the wings of the two wings of the glass plate 1 is large, the jet air moves away from the air nozzle as the two wings of the glass plate 1 curve along the bending mold, and jet air is generated even when the wings are moved away. Remove about one transport roll 5 on both wings of the glass plate so that it is sufficiently distributed on the glass surface.
Countermeasures such as increasing the number by reducing the interval of 0 ...
【００１０】しかし、前記のガラス板１の上辺と下辺に
ついては前記したように搬送ロール５と交差する位置関
係となるので、上辺と下辺を曲げ成形するエアノズル４
０は搬送ロール５、５間に設けざるを得ず、炉内の条件
等を調整しても光学歪みの発生を完全に除去するのは困
難であった。However, since the upper side and the lower side of the glass plate 1 have a positional relationship of intersecting with the transport roll 5 as described above, the air nozzle 4 for bending the upper side and the lower side is formed.
No. 0 had to be provided between the transport rolls 5, 5, and it was difficult to completely eliminate the occurrence of optical distortion even if conditions in the furnace were adjusted.
【００１１】さらに、クイックサグベンド法において、
ガラス板面に局部的に高温のジェットエアーを吹き付け
ると、軟化したガラス板が変形して波打ち状の光学歪み
が発生しやすいという問題点があり、ロールとロールと
の間隔が数十ミリと狭く、その隙間からガラス面に均一
なエアーを吹き付けることは困難であった。Further, in the quick sag bend method,
When high-temperature jet air is locally blown on the glass plate surface, there is a problem that the softened glass plate is deformed and undulating optical distortion is likely to occur, and the gap between the rolls is as narrow as tens of millimeters. However, it was difficult to blow uniform air onto the glass surface from the gap.
【００１２】[0012]
【課題を解決するための手段】本発明は、上記問題点の
解決を図る、すなわちクイックサグベンド法による車両
用窓ガラスの製造時に、搬送ロールと交差するガラス板
の周辺部に高温のジェットエアを均一に吹き付けること
ができ、光学歪みの発生も防止できることを目的とした
ものである。SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, that is, when manufacturing a window glass for a vehicle by a quick sag bend method, a high-temperature jet air is applied to a peripheral portion of a glass plate intersecting with a conveying roll. Is sprayed uniformly, and the occurrence of optical distortion can be prevented.
【００１３】すなわち、本発明は、加熱により軟化した
ガラス板を高温のジェットエア流によって下方より圧力
をかけて浮上させ、上方に設けた曲げ型の下面に押しつ
けて曲げ成形するノズルにおいて、該エアノズルの外形
形状を小径円柱部と大径円柱部を螺合させた段付の円柱
状とし、該大径円柱部の外周端部に設けた円筒状突起部
の内周面と、該小径円柱部の外周面間に形成される隙間
を大径円柱部内のエア導入路と連通させて、該隙間より
小径円柱部の外周面に沿ってジェットエアを噴射させて
ガラス板面への圧力分布を均一化させたガラス板成形用
エアノズルである。That is, the present invention relates to a nozzle for bending and forming a glass sheet softened by heating by applying pressure from below with a high-temperature jet air flow and pressing the glass sheet against a lower surface of a bending mold provided above. The external shape of the small-diameter cylindrical portion and the large-diameter cylindrical portion is formed into a stepped cylindrical shape by screwing, the inner peripheral surface of a cylindrical projection provided at the outer peripheral end of the large-diameter cylindrical portion, and the small-diameter cylindrical portion The gap formed between the outer peripheral surfaces of the cylinders communicates with the air introduction passage in the large-diameter cylindrical portion, and jet air is jetted from the gaps along the outer peripheral surface of the small-diameter cylindrical portion to evenly distribute the pressure distribution on the glass plate surface. It is an air nozzle for forming a glass plate.
【００１４】あるいは、本発明は、前記大径円柱部と小
径円柱部の螺合する長さを調整することにより螺合部に
設けたエア連通孔の流路が制限され、前記隙間から噴射
されるジェットエアの流量が調節可能となる上述のガラ
ス板成形用エアノズルである。Alternatively, according to the present invention, the flow path of the air communication hole provided in the screwing portion is restricted by adjusting the screwing length of the large-diameter cylindrical portion and the small-diameter cylindrical portion, and the jetting is performed from the gap. The above-mentioned air nozzle for forming a glass sheet, which enables the flow rate of jet air to be adjusted.
【００１５】あるいはまた、本発明は、前記大径円柱部
の外周端部に設けた円筒状突起部を小径円柱部の外周面
先端まで延ばした形状とした上述のガラス板成形用エア
ノズルである。Alternatively, the present invention is the above-described glass sheet forming air nozzle, wherein the cylindrical projection provided at the outer peripheral end of the large-diameter cylindrical portion is extended to the outer peripheral end of the small-diameter cylindrical portion.
【００１６】あるいはまた、本発明は、前記大径円柱部
の外周端部に設けた円筒状突起部の側面に炉内ガスを隙
間に吸引可能な炉内エア取入孔を設けるようにした上述
のガラス板成形用エアノズルである。Alternatively, according to the present invention, a furnace air intake hole is provided on a side surface of a cylindrical projection provided at an outer peripheral end of the large-diameter cylindrical portion so that furnace gas can be sucked into a gap. Is an air nozzle for forming a glass plate.
【００１７】そして、本発明は、加熱したガラス板を高
温のジェットエア流によって下方より圧力をかけて浮上
させ、上方に設けた曲げ型の下面に押しつけて曲げ成形
する方法において、上述のエアノズルを搬送ロール間に
複数本設け、前記エアノズルより噴出されたジェットエ
ア流に、炉内の高温ガスを巻き込みながらガラス板の下
面に向けて拡散させ、ガラス板下面に噴射したジェット
エア流の圧力分布が均一化されるようにしたガラス板の
曲げ成形方法である。According to the present invention, there is provided a method of forming a heated glass plate by applying pressure from below with a high-temperature jet air flow and pressing the glass plate against a lower surface of a bending mold provided above to bend the glass plate. A plurality of jet air streams ejected from the air nozzle are diffused toward the lower surface of the glass sheet while entraining the high-temperature gas in the furnace. This is a method for bending a glass sheet so as to be uniform.
【００１８】[0018]
【発明の実施の形態】本発明は、図１に示すように、外
形形状を小径円柱部２１と大径円柱部２３を螺合させた
段付の円柱状とし、該大径円柱部２３の外周端部に設け
た円筒状突起部２７の内周面と、前記小径円柱部２１の
外周面間に形成される円形状の隙間Ｓ 1を大径円柱部２
３内のエア導入路２５と連通させた円柱型ノズル２０で
ある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG.
The small diameter cylindrical portion 21 and the large diameter cylindrical portion 23 are screwed together.
Stepped cylindrical shape, provided at the outer peripheral end of the large-diameter cylindrical portion 23
Between the inner peripheral surface of the cylindrical projection 27 and the small-diameter cylindrical portion 21.
Circular gap S formed between outer peripheral surfaces 1The large diameter cylindrical part 2
The cylindrical nozzle 20 communicated with the air introduction passage 25 in 3
is there.
【００１９】前記小径円柱部２１は、小径円柱部２１の
中心を軸として、同心円状に内径が異なる段付き穿孔部
２２を設けた。また、該段付き穿孔部２２は、下部側の
開口側から上端側に向かって段階的に内径が小となって
おり、中間部分と上端側のそれぞれの内径には螺刻部を
設け、雌ねじ部２２ａを形成した。The small diameter cylindrical portion 21 is provided with a stepped perforated portion 22 having a different inner diameter concentrically around the center of the small diameter cylindrical portion 21 as an axis. The inner diameter of the stepped perforated portion 22 is gradually reduced from the lower opening side to the upper end side. The part 22a was formed.
【００２０】一方、前記大径円柱部２３は、その上端側
に中央突起部２４を設け、該中央突起部２４の外周に螺
刻部を設けた雄ねじ部２４ａとした。On the other hand, the large-diameter cylindrical portion 23 is a male screw portion 24a having a central projection 24 provided on the upper end thereof and a threaded portion provided on the outer periphery of the central projection 24.
【００２１】また、前記大径円柱部２３の上端の外周側
には円筒状の外周突起部２７を設け、さらに、大径円柱
部２３の中心にはエア導入路２５を下端開口部から中央
突起部２４の内部まで設け、該エア導入路２５より中央
突起部２４の外周側に通じるエア連通孔２６を中央突起
部２４に設けた。A cylindrical outer peripheral projection 27 is provided on the outer peripheral side of the upper end of the large-diameter cylindrical section 23, and an air introduction passage 25 is formed at the center of the large-diameter cylindrical section 23 from the lower end opening to the central projection. An air communication hole 26 extending from the air introduction passage 25 to the outer peripheral side of the central projection 24 is provided in the central projection 24.
【００２２】前記小径円柱部２１の雌ねじ部２２ａと大
径円柱部２３の雄ねじ部２４ａを螺合させ、前記大径円
柱部２３の外周突起部２７の円筒状の内面と、前記小径
円柱部２１の下端側外周面との間に隙間Ｓ1を設けた。The female screw portion 22a of the small-diameter cylindrical portion 21 and the male screw portion 24a of the large-diameter cylindrical portion 23 are screwed together, and the cylindrical inner surface of the outer peripheral projection 27 of the large-diameter cylindrical portion 23 is connected to the small-diameter cylindrical portion 21. and a gap S 1 between the lower end side outer peripheral surface of the.
【００２３】また、大径円柱部２３の中央突起部２４と
外周突起部２７間に形成される凹部と、前記小径円柱部
２１の下端との間には隙間Ｓ2が形成され、エア連通孔
２６からのエアは該隙間Ｓ2を通り抜け、前記隙間Ｓ1に
連通しており、該隙間Ｓ1と前記エア導入路２５とはエ
ア連通孔２６および隙間Ｓ2によって連通されている。A gap S 2 is formed between a concave portion formed between the central projection 24 and the outer peripheral projection 27 of the large-diameter cylindrical portion 23 and a lower end of the small-diameter cylindrical portion 21. the air from 26 through the the clearance S 2, communicates with the gap S 1, are connected with each other by the air communication hole 26 and the gap S 2 and the air introduction path 25 and the clearance S 1.
【００２４】該隙間Ｓ2については、必ずしもなくても
良いが、無くす場合は小径円柱部２１の下端側に隙間Ｓ
1と連通できる孔をいくつか設けるようにすればよい。The gap S 2 is not necessarily required, but if it is to be eliminated, the gap S 2 is provided at the lower end of the small-diameter cylindrical portion 21.
What is necessary is just to provide some holes which can communicate with 1 .
【００２５】小径円柱部２１の段付き穿孔部２２の頂部
側開口部にはボルト２８を螺合させ、上端開口部を閉塞
すると共に、ボルト２８の先端を大径円柱部２３の中央
突起部２４に当接させて、大径円柱部２３と小径円柱部
２１の螺合部分が緩まないようにした。A bolt 28 is screwed into the opening on the top side of the stepped hole 22 of the small-diameter cylindrical portion 21 to close the upper end opening, and the tip of the bolt 28 is connected to the central projection 24 of the large-diameter cylindrical portion 23. To prevent the threaded portion between the large-diameter cylindrical portion 23 and the small-diameter cylindrical portion 21 from loosening.
【００２６】また、前記エアノズル２０の大径円柱部２
３と小径円柱部２１の螺合する長さを調整することによ
り、前記大径円柱部２３の雄ねじ部２４ａからエア導入
孔２５にかけて設けたエア連通孔２６の流路を螺合する
小径円柱部２１の雌ねじ部２２ａによって全開から部分
的に塞ぐ等の調節ができるため、流量を変化させること
になり、エア導入路２５からの供給エアａの流量を調整
でき、前記隙間Ｓ1から噴出されるジェットエア圧力を
調節可能にしたものである。The large-diameter cylindrical portion 2 of the air nozzle 20
By adjusting the screwing length of the small-diameter cylindrical portion 3 with the small-diameter cylindrical portion 21, the small-diameter cylindrical portion screwing the flow path of the air communication hole 26 provided from the male screw portion 24 a of the large-diameter cylindrical portion 23 to the air introduction hole 25 is formed. since the female screw portion 22a of 21 can be adjusted such partially blocked from the fully open, results in changing the flow rate, can adjust the flow rate of the supply air a from the air introduction path 25, is ejected through the gap S 1 The jet air pressure is adjustable.
【００２７】このようなガラス板成形用の円柱型ノズル
２０によれば、大径円柱部の中心に設けたエア導入路２
５に送り込まれた高温の供給エアａは、エア連通孔２６
と隙間Ｓ2を経由して大径円柱部２３の外周の端部に設
けた円筒状突起部２７の内周面と、前記小径円柱部２１
の外周面間の隙間Ｓ1よりジェットエアとして噴射され
る。According to such a cylindrical nozzle 20 for forming a glass plate, the air introduction passage 2 provided at the center of the large-diameter cylindrical portion is provided.
5 is supplied to the air communication hole 26.
And an inner peripheral surface of a cylindrical projection 27 provided at an outer peripheral end of the large-diameter cylindrical portion 23 via the gap S 2 and the small-diameter cylindrical portion 21.
It is injected as a jet air from the gap S 1 between the outer peripheral surface of the.
【００２８】該ジェットエアは、小径円柱部２１の円筒
状の外面に沿って小径円柱部２１の先端まで直進する過
程で炉内のガスｂを巻き込み、ジェットエアとして小径
円柱部２１の先端より拡散することによって、ガラス板
面へ噴射されるエアの圧力分布を均一化させることがで
きる。The jet air entrains the gas b in the furnace while traveling straight to the tip of the small-diameter cylindrical portion 21 along the cylindrical outer surface of the small-diameter cylindrical portion 21 and diffuses from the tip of the small-diameter cylindrical portion 21 as jet air. By doing so, the pressure distribution of the air injected to the glass plate surface can be made uniform.
【００２９】また、図２に示す変形実施例においては、
前記大径円柱部２３の外周端部に設けた円筒状の外周突
起部２７を小径円柱部２１の先端まで延ばした形状と
し、前記大径円柱部２３の円筒状の外周突起部２７の側
面に炉内エア取入孔２９を設けるようにした。In the modified embodiment shown in FIG.
The cylindrical outer peripheral projection 27 provided at the outer peripheral end of the large-diameter cylindrical section 23 has a shape extending to the tip of the small-diameter cylindrical section 21. A furnace air intake hole 29 was provided.
【００３０】このような円柱型ノズル２０によれば、大
径円柱部２３の中心に設けたエア導入路２５に送り込ま
れた高温の供給エアａは、エア連通孔２６と隙間Ｓ2’
を経由して、大径円柱部２３の外周の端部に設けた円筒
状突起部２７の内周面と、前記小径円柱部２１の外周面
間の隙間Ｓ1’よりジェットエアとして噴射される。According to such a cylindrical nozzle 20, the high-temperature supply air “a” fed into the air introduction passage 25 provided at the center of the large-diameter cylindrical portion 23 is separated from the air communication hole 26 by the gap S 2 ′.
Through the gap S 1 ′ between the inner peripheral surface of the cylindrical projection 27 provided at the outer peripheral end of the large-diameter cylindrical portion 23 and the outer peripheral surface of the small-diameter cylindrical portion 21. .
【００３１】噴射される該ジェットエアは小径円柱部２
１の円筒状の外面と大径円柱部２３の外周端部に設けた
円筒状の外周突起部２７間に沿って小径円柱部２１の先
端まで直進する過程で、外周突起部２７の側面に設けた
炉内エア取入孔２９から炉内ガスｂを巻き込み、ジェッ
トエアとして小径円柱部２１の先端より噴射され拡散す
ることによって、ガラス板面へ噴射されるエアの圧力分
布を均一化させることができる。The jet air to be jetted has a small diameter cylindrical portion 2.
In the process of moving straight to the tip of the small-diameter cylindrical portion 21 along the cylindrical outer surface 1 and the cylindrical outer-protruding portion 27 provided at the outer peripheral end of the large-diameter cylindrical portion 23, provided on the side surface of the outer peripheral protruding portion 27 The gas b inside the furnace is taken in from the furnace air intake hole 29, and is jetted from the tip of the small-diameter cylindrical portion 21 as jet air and diffused, thereby making the pressure distribution of the air jetted onto the glass plate surface uniform. it can.
【００３２】続いて、図３に示す変形実施例において
は、小径円柱部３１の中央部に中央突起部３２を設け、
その外周に雄ねじ部３２ａを設け、大径円柱部３５に前
記雄ねじ部３２ａと螺合する雌ねじ部３６ａを設けるよ
うにした円柱型ノズル３０としても良い。この場合、大
径円柱部３５の雌ねじ部３６ａと小径円柱部３１の雄ね
じ部３２ａとの螺合時の緩み防止策として、大径円柱部
３５の側面より小径円柱部の中央突起部をボルト３８に
よって締付固定しても良い。Subsequently, in a modified embodiment shown in FIG. 3, a central projection 32 is provided at the center of the small-diameter cylindrical portion 31.
A cylindrical nozzle 30 may be provided in which a male screw portion 32a is provided on the outer periphery and a female screw portion 36a screwed with the male screw portion 32a is provided in the large-diameter cylindrical portion 35. In this case, as a measure to prevent loosening when the female screw portion 36a of the large-diameter cylindrical portion 35 and the male screw portion 32a of the small-diameter cylindrical portion 31 are screwed, the central projection of the small-diameter cylindrical portion from the side surface of the large-diameter cylindrical portion 35 is bolted. May be tightened and fixed.
【００３３】この場合の円柱型ノズル３０においても、
大径円柱部３５の中心に設けたエア導入路３３に送り込
まれた高温の供給エアａは、小径円柱部３１の中央突起
部３２に設けたエア連通孔３４および隙間Ｓ2”を経由
して、大径円柱部３５の外周の端部に設けた円筒状突起
部３７の内周面と、前記小径円柱部３１の外周面間の隙
間Ｓ1”よりジェットエアとして噴射される。In the cylindrical nozzle 30 in this case,
The high-temperature supply air a sent into the air introduction passage 33 provided at the center of the large-diameter cylindrical portion 35 passes through the air communication hole 34 provided in the central projection 32 of the small-diameter cylindrical portion 31 and the gap S 2 ″. Jet is injected as jet air from a gap S 1 ″ between the inner peripheral surface of the cylindrical projection 37 provided at the outer peripheral end of the large-diameter cylindrical portion 35 and the outer peripheral surface of the small-diameter cylindrical portion 31.
【００３４】噴射される該ジェットエアは小径円柱部３
１の円筒状の外面に沿って小径円柱部３１の先端まで直
進する過程で炉内ガスｂを巻き込み、ジェットエアとし
て小径円柱部３１の先端より拡散することによって、ガ
ラス板面へ噴射されるエアの圧力分布を均一化させるこ
とができる。The jet air to be injected has a small diameter cylindrical portion 3.
In the process of traveling straight along the cylindrical outer surface to the tip of the small-diameter cylindrical portion 31, the furnace gas b is entrained and diffused as jet air from the tip of the small-diameter cylindrical portion 31, so that the air jetted onto the glass plate surface Pressure distribution can be made uniform.
【００３５】以上好適な実施の形態について述べたが、
本発明はこれに限定されるものではなく種々の応用が考
えられるものである。While the preferred embodiment has been described above,
The present invention is not limited to this, and various applications can be considered.
【００３６】続いて以下に、本発明の使用方法を説明す
る。図５に示すように、搬送ロール５によって加熱曲げ
炉内を搬送しながら軟化点温度に達したフラットなガラ
ス板１を所定位置で停止させ、ガラス板の下方に配置
し、上方に噴射する複数のエアノズルによって高温のジ
ェット流を噴射させて該ガラス板１を浮上させ、浮上し
た該ガラス板１の上方に配置され下方に凸状に湾曲した
曲げ型（モールド）４の下面にガラス板１を押しつけ
て、前記曲げ型４の下面形状に合わせた湾曲ガラス１を
製造する。Next, the method of using the present invention will be described. As shown in FIG. 5, the flat glass sheet 1 which has reached the softening point temperature is stopped at a predetermined position while being transported in the heating bending furnace by the transport rolls 5, and is disposed below the glass sheet, and is sprayed upward. A high-temperature jet stream is jetted by the air nozzle to float the glass plate 1, and the glass plate 1 is placed on the lower surface of a bending mold (mold) 4 which is disposed above the floated glass plate 1 and is curved downward and convexly. By pressing, the curved glass 1 conforming to the shape of the lower surface of the bending mold 4 is manufactured.
【００３７】前記曲げ型４の下面には図示しないが複数
の吸引孔が設けられ、別途設けられた図示しない吸引装
置に連通しており、ガラス板１を曲げ型４の下面に吸着
させるものである。A plurality of suction holes (not shown) are provided on the lower surface of the bending die 4 and communicate with a separately provided suction device (not shown) for adsorbing the glass plate 1 to the lower surface of the bending die 4. is there.
【００３８】また、前記複数のエアノズルは、図４に示
すように、ガラス板１の下面のほぼ全域に亘ってジェッ
ト流を上方に噴射する複数のエアノズルが設けられてい
るが、特に搬送ロールによって取付本数に制約を受ける
位置、つまり搬送ロールの長手方向と交差する上辺と下
辺に設けるエアノズルについては、図１乃至図３に示す
ような本発明の円柱型ノズル２０を配置させ、その他の
位置については図７に示すような従来型のアスピレータ
型ノズル４０を配置し、それぞれのエアノズル２０、４
０に高温のジェットエアーを供給した。As shown in FIG. 4, the plurality of air nozzles are provided with a plurality of air nozzles for jetting a jet stream over substantially the entire lower surface of the glass plate 1. Regarding the positions subject to the restriction on the number of attachments, that is, the air nozzles provided on the upper side and the lower side intersecting the longitudinal direction of the transport roll, the cylindrical nozzle 20 of the present invention as shown in FIGS. Arranges a conventional aspirator type nozzle 40 as shown in FIG.
0 was supplied with high-temperature jet air.
【００３９】前記加熱により軟化したフラットなガラス
板１は、複数の円柱型ノズル２０、およびアスピレータ
型ノズル４０によって上方に噴出されるジェットエアー
により浮上し、曲げ型４の下面に押しつけられるが、自
動車用後部窓ガラスのようなガラス板１の両翼部周辺は
湾曲度が大きいので、曲がるに従ってエアノズルから遠
ざかるため、エアノズルから噴出されるジェットエアの
噴出圧力も強くする必要があり、エアノズル間のピッチ
も狭くして本数を増やしたアスピレータ型ノズル４０を
用いる。The flat glass plate 1 softened by the heating is floated by jet air jetted upward by a plurality of cylindrical nozzles 20 and an aspirator type nozzle 40, and is pressed against the lower surface of the bending die 4. Since the periphery of both wings of the glass plate 1 such as a rear window glass has a large degree of curvature, the farther from the air nozzle as it bends, it is necessary to increase the jet pressure of the jet air jetted from the air nozzle and the pitch between the air nozzles. An aspirator type nozzle 40 which is narrowed and increased in number is used.
【００４０】一方、搬送ロール５によって搬送されるガ
ラス板１が、搬送ロール５と交差する上辺と下辺に向け
て噴射させるエアノズルについては、搬送ロール５、５
間に設けざるを得ないため本数も制限され、エアの噴出
圧力が局部的に強いと、該部分の圧力分布が高くなり、
エアの当たらない部分との差が大きくなって、凹み状の
光学歪みとなり易い。On the other hand, with respect to the air nozzles that cause the glass plate 1 conveyed by the transport rolls 5 to jet toward the upper side and the lower side intersecting the transport rolls 5, the transport rolls 5, 5
The number is limited because it must be provided between, if the air ejection pressure is locally strong, the pressure distribution in this part will be high,
The difference from the portion not exposed to the air becomes large, and the optical distortion tends to be concave.
【００４１】このため、ガラス板１の上辺エッジと下辺
エッジ近傍に本発明の円柱型ノズル２０を設け、拡散型
のエアノズルとしたことによって、圧力分布の強いとこ
ろと弱いところが減少し、ガラス板１面に噴出されるエ
ア圧力が分散して均一に分布するようにした。For this reason, by providing the cylindrical nozzle 20 of the present invention near the upper edge and the lower edge of the glass plate 1 and using a diffusion type air nozzle, a portion where the pressure distribution is strong and a portion where the pressure distribution is weak are reduced. The air pressure ejected to the surface is dispersed and uniformly distributed.
【００４２】該フラットなガラス板１は、下方からのジ
ェットエアによって上方に設けた曲げ型４の凸面形状の
下面に押しつけると共に、曲げ型４の下面に設けた複数
の吸引孔によって曲げ型４の下面に吸着保持されるが、
ガラス板１は軟化しているので曲げ型４の下面の湾曲面
形状に沿って湾曲化する。The flat glass plate 1 is pressed against the lower surface of the bending mold 4 provided above by the jet air from below, and is pressed by a plurality of suction holes provided on the lower surface of the bending mold 4. It is sucked and held on the lower surface,
Since the glass plate 1 is softened, it bends along the curved surface shape of the lower surface of the bending die 4.
【００４３】このようにしてガラス板１を曲げ型４の下
面に密着させ、一定時間経過により所望の形状に曲げる
と、曲げ型４に吸着保持されたガラス板１の下部に側方
部よりコールドリングとよばれる湾曲した高温のガラス
板１の受取枠を挿入し、受取枠の挿入直後曲げ型４の吸
引解除と下方からのジェットエアの停止によって曲げ成
形されたガラス板１は、コールドリング上に落下し、コ
ールドリングと共に次工程である急冷強化工程に搬送さ
れ、急冷強化され、所望の形状に湾曲した強化ガラスが
得られる。When the glass plate 1 is brought into close contact with the lower surface of the bending mold 4 and bent into a desired shape after a certain period of time, the glass plate 1 is cold-loaded from the side to the lower portion of the glass plate 1 sucked and held by the bending mold 4. A receiving frame of a curved high-temperature glass plate 1 called a ring is inserted, and immediately after the insertion of the receiving frame, the glass plate 1 formed by bending by releasing suction of the bending mold 4 and stopping jet air from below is placed on the cold ring. Then, it is transported together with the cold ring to the next step of quenching and tempering, where it is quenched and tempered to obtain tempered glass curved into a desired shape.
【００４４】図６に示す図は、従来の直噴型ノズルとア
スピレータ型ノズル４０、および本発明の円柱型ノズル
２０について、エアノズルの先端からガラス板面までの
距離１５ｍｍ、３０ｍｍ、６０ｍｍ、１２０ｍｍのそれ
ぞれに応じて噴射されるエアの圧力分布について、比較
した結果を示したものである。FIG. 6 shows the conventional direct injection type nozzle and aspirator type nozzle 40, and the cylindrical type nozzle 20 of the present invention, in which the distance from the tip of the air nozzle to the glass plate surface is 15 mm, 30 mm, 60 mm, and 120 mm. It shows the result of comparing the pressure distribution of the air injected according to each.
【００４５】従来の直噴型ノズルの場合は、エアノズル
の先端の中心部分よりジェットエアが噴出されるもので
あり、ガラス板面までの距離が６０ｍｍの場合に、小範
囲で局部的に高いエア圧力となっているが、その周辺部
については非常に低い圧力分布となっている。In the case of the conventional direct injection type nozzle, jet air is jetted from the center of the tip of the air nozzle, and when the distance to the glass plate surface is 60 mm, locally high air in a small area is obtained. The pressure is high, but the pressure distribution is very low around the pressure.
【００４６】また、アスピレータ型ノズル４０の場合
は、直噴型よりやや広がりを持っているが、圧力分布は
やや低くなっている。Further, in the case of the aspirator type nozzle 40, although it is slightly wider than that of the direct injection type, the pressure distribution is slightly lower.
【００４７】さらに、本発明の円柱型ノズル２０の場合
は、従来のエアノズルに比べて、大きな広がりを持って
比較的均一に圧力が分布しているが、圧力はやや低くな
っているのが分かる。Further, in the case of the cylindrical nozzle 20 of the present invention, although the pressure is distributed relatively uniformly with a large spread as compared with the conventional air nozzle, it can be seen that the pressure is slightly lower. .
【００４８】これらのエアノズルについて、エアの拡散
性についてまとめると、 本発明の円柱型ノズル ＞ アスピレータ型ノズル ＞
直噴型ノズル の順に良いが、到達圧力はエアー拡散性が良いほど小さ
いことが判る。For these air nozzles, the diffusivity of air can be summarized as follows: cylindrical nozzle> aspirator nozzle>
It is better in the order of the direct injection type nozzle, but it can be seen that the ultimate pressure is smaller as the air diffusivity is better.
【００４９】また、エアノズルからガラス面までの距離
を約７０ｍｍとした場合、直噴型ノズルとアスピレータ
型ノズルでは薄板ガラスにおいて凹み状の光学歪みが発
生する可能性が高い。When the distance from the air nozzle to the glass surface is set to about 70 mm, there is a high possibility that a thin glass sheet will have a concave optical distortion in the direct injection type nozzle and the aspirator type nozzle.
【００５０】これらのエアノズルを用いて成形したガラ
ス板の曲率および反射像比較を行ったところ、本発明の
エアノズルをガラス板の上辺と下辺に用いて成形したガ
ラス板は、従来のエアノズルを用いた場合に比べて、大
きな逆反り状の光学歪み、鍋底状光学歪みもなく良好で
あった。When the curvature and the reflection image of the glass plate formed using these air nozzles were compared, the glass plate formed using the air nozzle of the present invention on the upper side and the lower side of the glass plate was obtained by using the conventional air nozzle. As compared to the case, there was no large reverse warp-like optical distortion and no pan-bottom optical distortion, which was favorable.
【００５１】[0051]
【発明の効果】本発明は、自動車用窓ガラスを曲げ成形
するときに、ガラス板を搬送する搬送ロールと交差する
ガラス板の端辺、特に後部用窓ガラスについていえば上
辺と下辺について、搬送ロールによって配置が充分でき
なくても、該ガラス板面部分に噴射されるエアーの圧力
分布を均一とさせることができ、ガラス板の該部分の成
形時の光学歪みの発生を防止できる。According to the present invention, when bending a window glass for an automobile, the edge of the glass sheet intersecting with the transport roll for transporting the glass sheet, particularly the upper side and the lower side of the rear window glass, are transported. Even if the arrangement cannot be sufficiently performed by the roll, the pressure distribution of the air jetted to the glass plate surface portion can be made uniform, and the occurrence of optical distortion at the time of molding the glass plate portion can be prevented.
【図１】本発明の円柱型ノズルの縦断面図。FIG. 1 is a longitudinal sectional view of a cylindrical nozzle of the present invention.
【図２】本発明の円柱型ノズルの変形例の縦断面図。FIG. 2 is a longitudinal sectional view of a modified example of the cylindrical nozzle of the present invention.
【図３】本発明の円柱型ノズルの別の変形例の縦断面
図。FIG. 3 is a longitudinal sectional view of another modification of the cylindrical nozzle of the present invention.
【図４】本発明の円柱型ノズルを配置したリフトジェッ
ト枠の平面図。FIG. 4 is a plan view of a lift jet frame in which the cylindrical nozzle of the present invention is arranged.
【図５】本発明の円柱型ノズルの周辺を示した側面図。FIG. 5 is a side view showing the periphery of a cylindrical nozzle of the present invention.
【図６】本発明の円柱型ノズルと従来のエアノズルのガ
ラス面への圧力分布を説明する図。FIG. 6 is a view for explaining pressure distribution on a glass surface of a cylindrical nozzle of the present invention and a conventional air nozzle.
【図７】従来のアスピレータ型ノズルの縦断面図。FIG. 7 is a longitudinal sectional view of a conventional aspirator type nozzle.
【図８】従来のアスピレータ型ノズルを配置したリフト
ジェット枠の平面図。FIG. 8 is a plan view of a lift jet frame provided with a conventional aspirator type nozzle.
ａ 供給エア ｂ 炉内ガス １ ガラス板 ４ 曲げ型（モールド） ５ 搬送ロール １０ リフトジェット枠 ２０ 円柱型ノズル ２１ 小径円柱部 ２２ 段付き穿孔部 ２２ａ 雌ねじ部 ２３ 大径円柱部 ２４ 中央突起部 ２４ａ 雄ねじ部 ２５ エア導入路 ２６ エア連通孔 ２７ 外周突起部 ２９ 炉内エア取入孔 ３０ 円柱型ノズル ３１ 小径円柱部 ３２ 中央突起部 ３２ａ 雄ねじ部 ３３ エア導入路 ３４ エア連通孔 ３５ 大径円柱部 ３６ 穿孔部 ３６ａ 雌ねじ部 ３７ 外周突起部 ４０ アスピレータ型ノズル ４１ 小径テーパー部 ４２ 段付き穿孔部 ４２ａ 雌ねじ部 ４３ 大径円柱部 ４４ 中央突起部 ４４ａ 雄ねじ部 ４５ エア導入路 ４６ エア連通孔 ４７ 外周突起部 a Supply Air b Furnace Gas 1 Glass Plate 4 Bending Mold (Mold) 5 Conveyance Roll 10 Lift Jet Frame 20 Cylindrical Nozzle 21 Small Diameter Cylindrical Portion 22 Stepped Perforated Portion 22a Female Thread 23 Large Diameter Cylindrical Portion 24 Center Projection 24a Male Thread Part 25 Air introduction path 26 Air communication hole 27 Outer circumference projection part 29 Furnace air intake hole 30 Column type nozzle 31 Small diameter column part 32 Center projection part 32a Male screw part 33 Air introduction path 34 Air communication hole 35 Large diameter column part 36 Perforation Part 36a Female thread part 37 Outer peripheral projection part 40 Aspirator type nozzle 41 Small diameter taper part 42 Stepped perforated part 42a Female thread part 43 Large diameter cylindrical part 44 Central projection part 44a Male thread part 45 Air introduction path 46 Air communication hole 47 Outer peripheral projection part
Claims (5)
ェットエア流によって下方より圧力をかけて浮上させ、
上方に設けた曲げ型の下面に押しつけて曲げ成形するエ
アノズルにおいて、該エアノズルの外形形状を小径円柱
部と大径円柱部を螺合させた段付の円柱状とし、該大径
円柱部の外周端部に設けた円筒状突起部の内周面と、該
小径円柱部の外周面間に形成される隙間を大径円柱部内
のエア導入路と連通させて、該隙間より小径円柱部の外
周面に沿ってジェットエアを噴射させてガラス板面への
圧力分布を均一化させたことを特徴とするガラス板成形
用エアノズル。1. A glass sheet softened by heating is floated by applying pressure from below by a high-temperature jet air flow,
In an air nozzle which is formed by being pressed against the lower surface of a bending die provided above, the outer shape of the air nozzle is a stepped cylinder in which a small-diameter cylindrical portion and a large-diameter cylindrical portion are screwed, and the outer periphery of the large-diameter cylindrical portion The gap formed between the inner peripheral surface of the cylindrical projection provided at the end and the outer peripheral surface of the small-diameter cylindrical portion communicates with the air introduction passage in the large-diameter cylindrical portion, and the outer periphery of the small-diameter cylindrical portion is smaller than the gap. An air nozzle for forming a glass sheet, wherein jet air is jetted along the surface to make the pressure distribution on the glass sheet surface uniform.
長さを調整することにより螺合部に設けたエア連通孔の
流路が制限され、前記隙間から噴射されるジェットエア
の流量が調節可能となることを特徴とする請求項１記載
のガラス板成形用エアノズル。2. A flow path of an air communication hole provided in the screwing portion is restricted by adjusting a screwing length of the large-diameter cylindrical portion and the small-diameter cylindrical portion. 2. The air nozzle according to claim 1, wherein the flow rate is adjustable.
状突起部を小径円柱部の外周面先端まで延ばした形状と
したことを特徴とする請求項１乃至２記載のガラス板成
形用エアノズル。3. The glass sheet molding according to claim 1, wherein the cylindrical projection provided at the outer peripheral end of the large-diameter cylindrical portion is formed to extend to the outer peripheral end of the small-diameter cylindrical portion. Air nozzle.
状突起部の側面に炉内ガスを隙間に吸引可能な炉内エア
取入孔を設けるようにしたことを特徴とする請求項３記
載のガラス板成形用エアノズル。4. A furnace air intake hole capable of sucking a furnace gas into a gap is provided on a side surface of a cylindrical projection provided at an outer peripheral end of the large-diameter cylindrical portion. Item 7. An air nozzle for forming a glass sheet according to Item 3.
流によって下方より圧力をかけて浮上させ、上方に設け
た曲げ型の下面に押しつけて曲げ成形する方法におい
て、請求項１乃至４記載のエアノズルを搬送ロール間に
複数本設け、前記エアノズルより噴出されたジェットエ
ア流に、炉内の高温ガスを巻き込みながらガラス板の下
面に向けて拡散させ、ガラス板下面に噴射したジェット
エア流の圧力分布が均一化されるようにしたことを特徴
とするガラス板の曲げ成形方法。5. The air nozzle according to claim 1, wherein the heated glass sheet is floated by applying pressure from below by a high-temperature jet air flow, and is pressed against a lower surface of a bending die provided above to bend the glass sheet. Are provided between the transport rolls, and the jet air flow ejected from the air nozzle is diffused toward the lower surface of the glass sheet while entraining the high-temperature gas in the furnace, and the pressure distribution of the jet air flow injected to the lower surface of the glass sheet The method of bending a glass sheet, wherein the glass is made uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33989899A JP3714834B2 (en) | 1999-11-30 | 1999-11-30 | Air nozzle for glass plate forming and bending method using the air nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33989899A JP3714834B2 (en) | 1999-11-30 | 1999-11-30 | Air nozzle for glass plate forming and bending method using the air nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001158630A true JP2001158630A (en) | 2001-06-12 |
| JP3714834B2 JP3714834B2 (en) | 2005-11-09 |
Family
ID=18331849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33989899A Expired - Fee Related JP3714834B2 (en) | 1999-11-30 | 1999-11-30 | Air nozzle for glass plate forming and bending method using the air nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3714834B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107500515A (en) * | 2017-09-30 | 2017-12-22 | 重庆市顺华安全玻璃有限公司 | Windshield pane bending apparatus |
-
1999
- 1999-11-30 JP JP33989899A patent/JP3714834B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107500515A (en) * | 2017-09-30 | 2017-12-22 | 重庆市顺华安全玻璃有限公司 | Windshield pane bending apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3714834B2 (en) | 2005-11-09 |
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