JPS631251B2 - - Google Patents
Info
- Publication number
- JPS631251B2 JPS631251B2 JP58022128A JP2212883A JPS631251B2 JP S631251 B2 JPS631251 B2 JP S631251B2 JP 58022128 A JP58022128 A JP 58022128A JP 2212883 A JP2212883 A JP 2212883A JP S631251 B2 JPS631251 B2 JP S631251B2
- Authority
- JP
- Japan
- Prior art keywords
- glass plate
- shape
- bending
- heater
- approximately
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011521 glass Substances 0.000 claims description 85
- 238000005452 bending Methods 0.000 claims description 66
- 238000010438 heat treatment Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 18
- 239000011162 core material Substances 0.000 claims description 7
- 238000005485 electric heating Methods 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 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
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- -1 siyamoto Chemical compound 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
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
- C03B23/025—Re-forming glass sheets by bending by gravity
- C03B23/0258—Gravity bending involving applying local or additional heating, cooling or insulating means
-
- 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
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
- C03B23/0307—Press-bending involving applying local or additional heating, cooling or insulating means
-
- 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
- C03B23/0352—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 by suction or blowing out for providing the deformation force to bend the glass sheet
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)
Description
【発明の詳細な説明】
本発明はガラス板の曲げ加工法に係り、更に詳
しくは、ガラス板を、中央部を基部として周辺部
を鋭く曲げて、縦方向及び横方向の断面の一方が
略〓形状、他方が略〓形状ないし略〓形状を有す
る形状に曲げ加工する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of bending a glass plate, and more specifically, a glass plate is sharply bent at its peripheral portion with the central portion as a base, so that one of the vertical and horizontal cross sections is approximately The present invention relates to a method of bending one side into a shape having an approximately 〓 shape or an approximately 〓 shape.
第１〜４図の様に、縦方向及び横方向の断面の
一方が略〓形状、他方が略〓形状ないし略〓形状
を有する形状、例えば一面又は二面を開放した筐
体状、椀体状又は角形の鍋底形状等のガラス板
が、シヨーケース、ステレオケース、レコードプ
レーヤー、家具、自動車用ガラス等その他各種用
途に要望されている。これらの複雑な形状のガラ
ス板を溶融ガラスから鋳造することはできるが、
鋳造によるものは平坦性、光学性が劣るので、平
板からの曲げ加工が望ましい。 As shown in Figures 1 to 4, one of the vertical and horizontal cross sections has an approximately 〓 shape and the other has an approximately 〓 shape or an approximately 〓 shape, such as a case shape with one or two sides open, a bowl shape. BACKGROUND OF THE INVENTION Glass plates in the shape of pot-shaped or rectangular pot bottoms are in demand for various other applications such as display cases, stereo cases, record players, furniture, and automobile glass. Although it is possible to cast glass plates with these complex shapes from molten glass,
Since those made by casting have poor flatness and optical properties, bending from a flat plate is preferable.
本発明は、かかる第１〜４図に例示したような
縦方向及び横方向の断面の一方が略〓形状、他方
が略〓形状ないし略〓形状を有する形状のガラス
板を工業的に生産する方法を提供することを目的
とするものである。 The present invention industrially produces a glass plate having a shape in which one of the vertical and horizontal cross sections has an approximately 〓 shape and the other has an approximately 〓 shape or an approximately 〓 shape as illustrated in FIGS. 1 to 4. The purpose is to provide a method.
本発明は、かかる目的に基づいて検討の結果発
明されたものであり、その要旨は、ガラス板の中
央部を基部としてその周辺部に該基部を囲む閉鎖
線状、又は一側が開放されたコ字形状若しくは〓
形状を有する細長状通電加熱ヒーターをガラス板
に近接して、又はガラス板面に接して配し、上記
細長状通電加熱ヒーターを通電加熱してガラス板
の細長状通電加熱ヒーターの近傍を局所的に軟化
点近傍の温度まで加熱し、ガラス板の縦方向及び
横方向の断面の一方が略〓形状、他方が略〓形状
又は略〓形状を有する形状にガラス板を鋭く曲げ
ることを特徴とするガラス板の曲げ加工方法に関
するものである。 The present invention was invented as a result of studies based on the above object, and its gist is that the center of the glass plate is used as a base, and the periphery of the glass plate has a closed linear shape surrounding the base, or a column that is open on one side. character shape or 〓
A slender energizing heater having a shape is disposed close to the glass plate or in contact with the glass plate surface, and the slender energizing heater is electrically heated to locally heat the glass plate in the vicinity of the slender energizing heater. It is characterized by heating the glass plate to a temperature near its softening point, and sharply bending the glass plate into a shape in which one of the vertical and horizontal cross sections of the glass plate has an approximately 〓 shape, and the other has an approximately 〓 shape or an approximately 〓 shape. This invention relates to a method for bending a glass plate.
本発明によるガラス板の曲げ加工方法の好まし
い態様においては、前記細長状通電ヒーターが前
記曲げ線に沿つて、ガラス板との間隔を２〜50mm
として配置され、ガラス板との接触防止の手段が
構ぜられている。 In a preferred embodiment of the method for bending a glass plate according to the present invention, the elongated current-carrying heater is arranged at a distance of 2 to 50 mm from the glass plate along the bending line.
A means for preventing contact with the glass plate is provided.
本発明によるガラス板の曲げ加工方法のもう一
つの好ましい態様においては、前記細長状通電ヒ
ーターが、セラミツクス材を芯材とし、線状又は
帯状の抵抗発熱体を装着ないし捲着したものであ
る。 In another preferred embodiment of the method for bending a glass plate according to the present invention, the elongated current-carrying heater has a ceramic material as a core material, and a linear or band-shaped resistance heating element is attached or wound thereon.
以下、本発明を更に詳細に説明する。 The present invention will be explained in more detail below.
第１〜４図は、本発明により曲げ加工された縦
方向及び横方向の断面の一方が略〓形状、他方が
略〓形状ないし略〓形状を有する形状、例えば一
面又は二面が開放した筐体状、椀体状又は角形の
鍋底形状等のガラス板の代表例を示したものであ
り、第１〜４図において、ａは平面図、ｂは平面
図ａのＡ―Ｂ線断面図、ｃは平面図ａのＣ―Ｄ線
断面図を示す。図面において、１はガラス板全体
を、２は鋭く曲げられた曲げ線、３は中央部（基
部）を、４は周辺部を示す。このガラス板１にお
いて、かかる形状に曲げられたガラス板の曲げ線
部分は、例えば10mm〜700mmの曲げ半径を有して
いる。 Figures 1 to 4 show a case in which one of the vertical and horizontal cross sections is approximately 〓 shape and the other is approximately 〓 shape or approximately 〓 shape, for example, one side or two sides are open. 1 to 4, a is a plan view, b is a sectional view taken along the line AB of the plan view a, c shows a sectional view taken along the line CD of the plan view a. In the drawings, 1 indicates the entire glass plate, 2 indicates a sharply bent bending line, 3 indicates the central portion (base), and 4 indicates the peripheral portion. In this glass plate 1, the bending line portion of the glass plate bent into such a shape has a bending radius of, for example, 10 mm to 700 mm.
第１〜３図は、縦方向及び横方向の断面の両方
が略〓形状を有する形状に曲げ加工された曲げガ
ラス板の例であり、第４図は縦方向の断面が略〓
形状に、又横方向の断面が略〓形状を有する形状
に曲げ加工された曲げガラス板の例である。 Figures 1 to 3 are examples of bent glass plates that have been bent into a shape in which both the vertical and horizontal cross sections have approximately the same shape, and Figure 4 shows the vertical cross section approximately in the shape.
This is an example of a bent glass plate that has been bent into a shape and a cross section in the lateral direction which has a substantially square shape.
なお、本発明において、鋭く曲げるとは、ガラ
ス板の曲げ部分を第５図ａの様に、平板５の曲げ
角を、曲げ部の曲げ半径（曲率の逆数）をＲ、
曲げ部の角度をθとして表わした場合、曲げ半径
Ｒを小さくすることである。ガラス板の曲げ加工
の場合、例えば曲げ半径Ｒを約10mm〜700mmとし
て曲げる場合に鋭く曲げるということができる。
曲げ線２は、例えば曲げ部の角度θの中心線がガ
ラス板を通る点を連ねた線をいう。この曲げ部の
角度θの両側の部分は平坦の場合もあり、又、第
５図ｂの様に曲げ部の角度θの両側の部分が曲げ
部の曲げ半径R1より大なる曲率R2、R3で曲げら
れている場合もあり、又、曲げ部の両側部分のよ
り大なる曲率をもつて曲げられた彎曲部分の曲率
半径が一定ではなく遂次変化している場合もあ
る。いくつかの曲率をもつて平板を曲げ加工した
場合、一方の方向における連続する曲率半径に最
低値が認められるときに、該個所を通る線が曲げ
線となる。 In the present invention, sharp bending means that the bent portion of the glass plate is bent as shown in FIG.
When the angle of the bent portion is expressed as θ, the bending radius R is to be made small. In the case of bending a glass plate, for example, when the bending radius R is approximately 10 mm to 700 mm, the glass plate can be bent sharply.
The bending line 2 is, for example, a line connecting points where the center line of the angle θ of the bent portion passes through the glass plate. The parts on both sides of the angle θ of this bent part may be flat, or, as shown in FIG . In some cases, it is bent at R 3 , and in other cases, the radius of curvature of a curved portion that is bent with a larger curvature on both sides of the bent portion is not constant but changes sequentially. When a flat plate is bent with several curvatures, when a minimum value is observed in the continuous radius of curvature in one direction, the line passing through that point becomes the bending line.
本発明のガラス板の曲げ加工を実施する場合に
は、所望の形状が得られる様にガラス板を切断す
る。ついで、所望の曲げ線に対応した長さ、曲り
を有する細長状通電ヒーターを用意する。例えば
第１図の様な形状にガラス板を曲げ加工する場合
には、閉鎖線状の口形の曲げ線２に対応する細長
状通電ヒーター（必要に応じ、コーナー部の曲げ
線２′に対応する枝ヒーターを設けることもでき
る）を用意する。又、第２図の様な形状にガラス
板を曲げ加工する場合には、形状の曲げ線２に
対応する細長状通電ヒーター（必要に応じ、コー
ナー部の曲げ線２′に対応する枝ヒーターを設け
ることもできる。）を用意する。細長状通電ヒー
ターとしては、電気絶縁性を有し、少なくとも
1000℃以上の温度に対する対熱性を有し、変形、
変質しない、アルミナ、窒化ほう素、窒化けい
素、シリカ、シヤモツト、マグネシア、ドロマイ
ト、マグクロ等のセラミツクスを芯材として、こ
れに線状又は帯状の抵抗発熱体を装着ないし捲着
したものが最適である。抵抗発熱体の材質の例と
しては、タンタル、モリブデン、白金、これらの
合金、ニツケル・クロム合金、ステンレス鋼など
があげられる。場合によつては、かかる線状又は
帯状の抵抗発熱体をそのまま配置することもでき
る。又、細長状通電ヒーターとしては、ガラス板
面の曲げ線部分に導電性ペースト、例えば銀ペー
ストを所定巾の線条にプリントして作成したもの
であつてもよい。曲率分布図における曲げ線を挾
む限定値より小なる曲げ半径部分の幅が広い場
合、又は該曲げ半径部分における曲げ半径値が特
に小さい場合などは、必要に応じて細長状通電ヒ
ーターの該部に対応する部分を太くする等により
該部分よりの発熱量を大とすることもできる。
又、曲げ線が展開図面上で彎曲しているときは、
彎曲せしめられる。又、曲げ半径値が曲げ線の長
さ方向に変化している場合には、細長状通電ヒー
ターの巾を変えたり、ガラス板面と細長状通電ヒ
ーターとの間隔を変えたりする。又、かかる細長
状通電ヒーターにはコーナー部の曲げ線２′に対
応する枝ヒーターを設けることもできる。細長状
通電ヒーター、即ちその芯材は各部分が棒状又は
管状をなす一体成形品であつてもよく、また、各
直線又は彎曲線部を棒又は管で作成し、セラミツ
クス、ステンレス等のコーナー部材でこれらを接
続して一体化してもよい、あるいは分割化しても
よい。又、細長状通電ヒーターは、加熱側の発熱
体が同一面になるようにし、発熱体面より芯材、
クツシヨン材等の補助材が突出しないようにする
のが好ましい。更に、各部材を接続して一体化し
た細長状通電ヒーターの場合も、各部材間で動揺
しない様にするのが好ましい。なお、細長状通電
ヒーターは、曲げ線の部分的加熱時、移動しない
様に支持してもよい、又、ガラス板の垂下ととも
に下降する様にしてもよい。 When bending a glass plate according to the present invention, the glass plate is cut into a desired shape. Next, an elongated energized heater having a length and bend corresponding to the desired bending line is prepared. For example, when bending a glass plate into the shape shown in Figure 1, a slender current-carrying heater corresponding to the bending line 2 of the closed linear mouth shape (if necessary, a slender electric heater corresponding to the bending line 2' of the corner part) is used. A branch heater may also be provided). In addition, when bending a glass plate into the shape shown in Fig. 2, a long slender current-carrying heater corresponding to the bending line 2 of the shape (if necessary, a branch heater corresponding to the bending line 2' at the corner part) is used. ). The elongated current-carrying heater has electrical insulation properties and at least
It has heat resistance against temperatures of 1000℃ or more, and does not deform.
It is best to use non-degradable ceramics such as alumina, boron nitride, silicon nitride, silica, siyamoto, magnesia, dolomite, maguro, etc. as the core material, and to attach or wrap a wire or band-shaped resistance heating element around this core material. be. Examples of materials for the resistance heating element include tantalum, molybdenum, platinum, alloys thereof, nickel-chromium alloy, and stainless steel. In some cases, such linear or band-shaped resistance heating elements may be placed as they are. Further, the elongated current-carrying heater may be made by printing conductive paste, for example, silver paste, in a line of a predetermined width on the bent line portion of the glass plate surface. If the width of the bending radius portion smaller than the limit value between the bending lines in the curvature distribution diagram is wide, or if the bending radius value in the bending radius portion is particularly small, the width of the bending radius portion of the elongated energizing heater may be adjusted as necessary. It is also possible to increase the amount of heat generated from the portion by making the portion corresponding to the portion thicker.
Also, if the bending line is curved on the developed drawing,
It is forced to curve. Further, if the bending radius value changes in the length direction of the bending line, the width of the elongated energizing heater is changed, or the distance between the glass plate surface and the elongated energizing heater is changed. Further, such an elongated current-carrying heater may be provided with branch heaters corresponding to the bending lines 2' at the corner portions. The elongated electric heater, that is, its core material, may be an integrally molded product in which each part is rod-shaped or tubular, and each straight or curved portion may be made of a rod or tube, and corner members made of ceramics, stainless steel, etc. These may be connected and integrated, or they may be divided. In addition, for the elongated current-carrying heater, the heating element on the heating side should be on the same surface, and the core material,
It is preferable to prevent auxiliary materials such as cushion materials from protruding. Furthermore, even in the case of an elongated current-carrying heater in which each member is connected and integrated, it is preferable to prevent movement between the members. Note that the elongated current-carrying heater may be supported so as not to move when partially heating the bending line, or may be made to descend as the glass plate droops.
このようにして作成された細長状通電ヒーター
は、ガラス板の曲げ線となる位置に近接させて、
あるいは接して配される。あるいは直接にガラス
板面にプリントされる。普通は細長状通電ヒータ
ーをガラス板の片側に配するが、必要に応じて両
側に配置してもよい。電気絶縁性の芯材に抵抗発
熱体を捲着した細長状通電ヒーターを利用する場
合には、細長状通電ヒーターとガラス板との間隔
は２〜50mmとするのが好ましい。間隔の下限は、
細長状通電ヒーターとガラス板の接触を避ける為
で、上限は加熱効率の問題より決められるもので
ある。上記した方式による細長状通電ヒーターの
配置に際しては、ガラス板との間隔を２〜50mm程
度まで少なくするので、両者の接触防止手段を構
じておくのが好ましい。 The elongated current-carrying heater created in this way is placed close to the bending line of the glass plate.
Or placed next to each other. Alternatively, it can be printed directly onto a glass plate. Usually, the elongated current-carrying heater is placed on one side of the glass plate, but it may be placed on both sides if necessary. When using an elongated current-carrying heater in which a resistance heating element is wound around an electrically insulating core material, the distance between the elongated current-carrying heater and the glass plate is preferably 2 to 50 mm. The lower limit of the interval is
This is to avoid contact between the elongated energizing heater and the glass plate, and the upper limit is determined based on heating efficiency issues. When arranging the elongated current-carrying heater according to the method described above, the distance between the heater and the glass plate is reduced to about 2 to 50 mm, so it is preferable to provide means for preventing contact between the heater and the glass plate.
ガラス板を曲げ型に載置して加熱する場合は、
ガラス板の周縁部と細長状通電ヒーターとの間に
絶縁耐熱性のスペーサを挾んだり、細長状通電ヒ
ーターの吊り下げを確実にする手段がとられる。
プレス曲げ加工の為にガラス板を吊具により垂直
に吊り下げて加熱する場合には、ガラス板の振動
による細長状通電ヒーターとの接触を防止する為
に、細長状通電ヒーターに前述のスペーサに相当
する接触防止片を取付けておくとよい。 When heating a glass plate by placing it in a bending mold,
Measures are taken, such as interposing an insulating and heat-resistant spacer between the peripheral edge of the glass plate and the elongated current-carrying heater, to ensure that the elongated current-carrying heater is suspended.
When heating a glass plate by hanging it vertically using a hanger for press bending, in order to prevent the glass plate from coming into contact with the slender energizing heater due to vibration, the spacer mentioned above should be placed on the slender energizing heater. It is a good idea to attach a corresponding contact prevention piece.
第６，７図に本発明の方法を実施するための装
置の概略図を示す。 Figures 6 and 7 show schematic diagrams of an apparatus for carrying out the method of the invention.
第３図ａ，ｂは、縦方向及び横方向の両方が略
〓形状を有する第１図の様な略筐体状のガラス板
が得られる様に設計された凹型状の成形面を有す
る曲げ型１０の周縁にガラス板１１を載置し、こ
のガラス板１１の鋭く曲げようとする曲げ線に沿
つてその上方に約20mmの間隔をおいて上記曲げ線
に対応した□形状の閉鎖状細長状通電ヒーター１
２を配し、重力により上記形状に曲げ加工できる
様にされた曲げ装置の例である。この装置による
場合には、上記曲げ型１０に載置され、細長状通
電ヒーター１２を配したガラス板１１を加熱炉へ
入れて全体を600〜670℃程度に加熱し、その後、
細長状通電加熱ヒーター１２に通電して、ガラス
板１１の曲げ線２部分を更に局部的に650〜730℃
程度に加熱して、自重により垂下させて凹形状の
曲げ型１０の成形面に一致した形状に曲げ加工さ
れたガラス板を得る。 Figures 3a and 3b show bending with a concave molding surface designed to obtain a glass plate with a substantially casing shape as shown in Figure 1, which has a substantially square shape in both the vertical and horizontal directions. A glass plate 11 is placed on the periphery of the mold 10, and a closed elongated □ shape corresponding to the bending line is placed above the bending line of the glass plate 11 at a distance of about 20 mm along the bending line where the glass plate 11 is to be sharply bent. Electric heater 1
This is an example of a bending device that is equipped with 2 and can be bent into the above shape by gravity. In the case of this device, the glass plate 11 placed on the bending mold 10 and equipped with the elongated energizing heater 12 is placed in a heating furnace and heated to about 600 to 670°C, and then,
Electricity is applied to the elongated electric heating heater 12 to further locally heat the bending line 2 portion of the glass plate 11 to 650 to 730°C.
The glass plate is heated to a certain degree and allowed to hang under its own weight to obtain a glass plate that is bent into a shape that matches the forming surface of the concave bending mold 10.
第４図は、ガラス板１１を枠体１３に吊り具１
４により垂直に吊り下げて、このガラス板の曲げ
線を局部的に加熱する様にされたガラス板の加熱
装置の正面図である。 FIG. 4 shows a hanging tool 1 for attaching a glass plate 11 to a frame 13.
FIG. 4 is a front view of a glass plate heating device which is vertically suspended by a glass plate and is adapted to locally heat the bending line of the glass plate.
１２は細長状通電ヒーターであり、このヒータ
ー１２はガラス板１１の曲げ線に沿つてガラス板
１１に近接して配置され、取付具１５により枠体
１３に固定されている。 Reference numeral 12 denotes an elongated current-carrying heater, which is arranged close to the glass plate 11 along the bending line of the glass plate 11 and fixed to the frame 13 by a fixture 15 .
１６は細長状通電ヒーター１２とガラス板１１
との接触を防止する為、取付具１５に固定された
接触防止片である。 16 is a slender current-carrying heater 12 and a glass plate 11
This is a contact prevention piece fixed to the fixture 15 in order to prevent contact with.
本発明方法によりガラス板を曲げ加工する場
合、ガラス板は加熱炉内で全体が軟化点付近の温
度約600〜720℃（ソーダライムガラス板の場合）
に加熱される。その後、細長状通電ヒーターに通
電され、曲げ線近傍が約650〜750℃に局部的に集
中加熱される。所要の温度にガラス板が加熱され
ると、直ちに加熱炉内で、又は加熱炉より取出
し、重力又はプレス、エア・フオームその他各種
曲げ方法により曲げられ、引続いて徐冷する。必
要に応じて曲げ加工後、直ちに急冷し強化加工が
施こされる。ガラス板全体及び曲げ線近傍の加熱
温度は、ガラス板の材質、厚さ、曲げ形状、曲げ
型等により上記範囲内において適宜選択される。 When bending a glass plate using the method of the present invention, the entire glass plate is placed in a heating furnace at a temperature of approximately 600 to 720°C, near its softening point (in the case of soda lime glass plates).
heated to. Thereafter, electricity is applied to the elongated electric heater, and the vicinity of the bending line is locally heated to approximately 650 to 750°C. Once the glass plate is heated to the required temperature, it is immediately placed in or removed from the heating furnace, bent by gravity, press, air form, or any other bending method, and then slowly cooled. If necessary, after bending, the material is immediately cooled and strengthened. The heating temperature of the entire glass plate and the vicinity of the bending line is appropriately selected within the above range depending on the material, thickness, bending shape, bending type, etc. of the glass plate.
本発明によるガラス板の曲げ加工方法は以上の
如く構成されているので、本発明の方法により、
鋭い曲率部分を有し、変化が多く、縦方向及び横
方向の断面の一方が略〓形状、他方が略〓形状な
いし略〓形状を有する複雑な形状の曲げガラス板
を工業的に製造することができる。 Since the method of bending a glass plate according to the present invention is configured as described above, by the method of the present invention,
To industrially manufacture a bent glass plate having a complicated shape, which has a sharp curvature, has many variations, and has a longitudinal and transverse cross section in which one of the cross sections is approximately 〓 shape and the other is approximately 〓 shape or approximately 〓 shape. Can be done.
第１〜４図ａ〜ｃは、本発明により製造された
曲げガラス板を例示した図面であり、第１〜４図
のａは曲げガラス板の平面図、ｂはｃのＡ―Ｂ線
断面図、ｃはａのＣ―Ｄ線断面図を示し、第５図
ａ，ｂは曲げ角、曲げ半径、曲げ部の角度を説明
するための曲げガラス板の屈曲部の断面図、第６
図は、本発明の方法による加熱、曲げ工程を実施
する装置の図面であり、そのａは平面図、ｂはｃ
のＥ―Ｆ線断面図を示し、第７図は本発明の方法
による加熱工程を実施するための加熱装置の一具
体例の正面図を示すものである。
１…ガラス板、２…曲げ線、３…中央部（基
部）、４…周辺部、５…ガラス板、１０…曲げ型、
１１…ガラス板、１２…細長状通電ヒーター、１
３…枠体、１４…吊り具、１５…取付具。
Figures 1 to 4 a to c are drawings illustrating a bent glass plate manufactured according to the present invention, in which a is a plan view of the bent glass plate and b is a cross section taken along line A-B of c. Figures 5 and 5 (c) are cross-sectional views taken along the line CD of a, and Figures 5 (a) and 5 (b) are cross-sectional views of the bent portion of a bent glass plate for explaining the bending angle, bending radius, and angle of the bent portion.
The figures are drawings of an apparatus for carrying out the heating and bending process according to the method of the present invention, in which a is a plan view and b is a plan view.
FIG. 7 shows a front view of a specific example of a heating device for carrying out the heating process according to the method of the present invention. DESCRIPTION OF SYMBOLS 1...Glass plate, 2...Bending line, 3...Central part (base), 4...Peripheral part, 5...Glass plate, 10...Bending mold,
11...Glass plate, 12...Elongated electric heater, 1
3... Frame body, 14... Hanging tool, 15... Mounting tool.
Claims (1)
該基部を囲む閉鎖線状、又は一側が開放されたコ
字形状若しくは〓形状を有する細長状通電加熱ヒ
ーターをガラス板に近接して、又はガラス板面に
接して配し、上記細長状通電加熱ヒーターを通電
加熱してガラス板の細長状通電加熱ヒーターの近
傍を局所的に軟化点近傍の温度まで加熱し、ガラ
ス板の縦方向及び横方向の断面の一方が略〓形
状、他方が略〓形状又は略〓形状を有する形状に
ガラス板を鋭く曲げることを特徴とするガラス板
の曲げ加工方法。 ２ 上記閉鎖線状が略矩形状ないし略円状である
ことを特徴とする特許請求の範囲第１項記載のガ
ラス板の曲げ加工方法。 ３ 前記細長状通電ヒーターが前記曲げ線に沿つ
て、ガラス板との間隔を２〜50mmとして配置さ
れ、ガラス板との接触防止の手段が講ぜられてい
る特許請求の範囲第１項記載のガラス板の曲げ加
工方法。 ４ 前記細長状通電ヒーターがセラミツクス材を
芯材とし、線状又は帯状の抵抗発熱体を装着ない
し捲着したものである特許請求の範囲第１項記載
のガラス板の曲げ加工方法。[Scope of Claims] 1. A glass plate is provided with a slender electrically heated heater having a closed linear shape, a U-shape or a square shape with one side open, surrounding the base at the center of the glass plate. The elongated electric heating heater is placed in close proximity or in contact with the glass plate surface, and the elongated electric heating heater is electrically heated to locally heat the glass plate near the elongated electric heating heater to a temperature near the softening point. A method for bending a glass plate, comprising sharply bending the glass plate into a shape in which one of the vertical and horizontal cross sections has an approximately 〓 shape and the other has an approximately 〓 shape or an approximately 〓 shape. 2. The method of bending a glass plate according to claim 1, wherein the closed line shape is approximately rectangular or approximately circular. 3. The glass according to claim 1, wherein the elongated current-carrying heater is arranged along the bending line with a distance from the glass plate of 2 to 50 mm, and measures are taken to prevent contact with the glass plate. How to bend a plate. 4. The method of bending a glass plate according to claim 1, wherein the elongated current-carrying heater has a ceramic material as a core material and a linear or band-shaped resistance heating element is attached or wound thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2212883A JPS59152232A (en) | 1983-02-15 | 1983-02-15 | Bending processing of plate glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2212883A JPS59152232A (en) | 1983-02-15 | 1983-02-15 | Bending processing of plate glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59152232A JPS59152232A (en) | 1984-08-30 |
| JPS631251B2 true JPS631251B2 (en) | 1988-01-12 |
Family
ID=12074245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2212883A Granted JPS59152232A (en) | 1983-02-15 | 1983-02-15 | Bending processing of plate glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59152232A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2726350B1 (en) * | 1994-10-14 | 1997-01-10 | Eurokera | VITROCERAMIC FOLDED PLATES, COOKING PLATES COMPRISING SUCH A FOLDED PLATE, AND METHOD FOR MANUFACTURING A VITROCERAMIC FOLDED PLATE |
| FR2777559B1 (en) | 1998-04-16 | 2000-07-13 | En Nom Collectif Eurokera Soc | MANUFACTURE OF VITROCERAMIC PLATES WITH OPENING (S) WITH A DEFORMED EDGE; DEFORMED VITROCERAMIC PLATES |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5413523A (en) * | 1977-07-04 | 1979-02-01 | Asahi Glass Co Ltd | Method of sharply bending glass sheet |
-
1983
- 1983-02-15 JP JP2212883A patent/JPS59152232A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5413523A (en) * | 1977-07-04 | 1979-02-01 | Asahi Glass Co Ltd | Method of sharply bending glass sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59152232A (en) | 1984-08-30 |
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