JPH02225326A - Apparatus for producing glass plate - Google Patents
Apparatus for producing glass plateInfo
- Publication number
- JPH02225326A JPH02225326A JP13809389A JP13809389A JPH02225326A JP H02225326 A JPH02225326 A JP H02225326A JP 13809389 A JP13809389 A JP 13809389A JP 13809389 A JP13809389 A JP 13809389A JP H02225326 A JPH02225326 A JP H02225326A
- Authority
- JP
- Japan
- Prior art keywords
- glass plate
- plate
- glass
- width
- manufacturing apparatus
- 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
- 239000011521 glass Substances 0.000 title claims abstract description 114
- 239000006060 molten glass Substances 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract 2
- 230000000903 blocking effect Effects 0.000 claims description 28
- 238000004519 manufacturing process Methods 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 abstract description 15
- 241000276425 Xiphophorus maculatus Species 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003280 down draw process Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/06—Forming glass sheets
- C03B17/067—Forming glass sheets combined with thermal conditioning of the sheets
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/06—Forming glass sheets
- C03B17/064—Forming glass sheets by the overflow downdraw fusion process; Isopipes therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ガラス板の製造装置に係わり、特に垂直方向
下方へガラス板を引き抜くガラス板の製造装置に関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a glass plate manufacturing apparatus, and more particularly to a glass plate manufacturing apparatus that pulls out a glass plate vertically downward.
（従来の技術）
ガラス板を製造する方法として、ガラス板を垂直方向下
方へ引き抜くダウンドロ一方式（例えば特開昭６０−１
１２３５公報）が知られている。(Prior art) As a method of manufacturing a glass plate, there is a down-draw method in which the glass plate is pulled vertically downward (for example, Japanese Patent Laid-Open No. 60-1
1235 Publication) is known.
ダウンドロ一方式の場合には、溶融ガラスをくさび状成
形体の両側面に沿って流下させ、成形体の下端部で合流
させ、そして冷却しながら下方へ引っ張ることによりガ
ラス板の成形を行う。In the case of the down-draw type, the molten glass is caused to flow down along both sides of the wedge-shaped molded body, join together at the lower end of the molded body, and then pulled downward while cooling to form a glass plate.
上記方式によるガラス板の成形は、炉壁が耐火レンガ製
の炉室内で行われるが、ガラス板を炉室から引き出すた
めの開口やその他の隙間が炉壁に形成されているため、
炉室は完全には密閉されておらず、炉室からの空気の流
出や炉室への流入は避けられない、また、炉室内におい
ても、高温のガラス板や発熱体等に近い空気が強く加熱
され、他の部分の空気との間に温度差を生じる。従って
、外部から流入した低温の空気や炉室内各部における空
気の温度差により、炉室内に空気の対流が生じる。Glass plates are formed using the above method in a furnace chamber whose furnace walls are made of refractory bricks.
The furnace chamber is not completely sealed, so it is unavoidable for air to flow out of the furnace chamber or flow into the furnace chamber.Also, even in the furnace chamber, the air near the high-temperature glass plate and heating element is strong. It is heated and creates a temperature difference between it and other parts of the air. Therefore, convection of air occurs within the furnace chamber due to the low temperature air flowing in from the outside and the temperature difference between the air in various parts of the furnace chamber.
この対流は、炉室内への空気の流入量や温度の変動の影
響を受け、場所的にも時間的にも一定でなく、炉内のガ
ラス板を不均一に冷却するので、ガラス板の場所によっ
て冷却速度の差が生じ、ガラス仮に局部的歪を与え、変
形させることになる。This convection is affected by the amount of air flowing into the furnace chamber and temperature fluctuations, and is not constant both in place and over time, and cools the glass plate inside the furnace unevenly. This causes a difference in the cooling rate, causing local strain and deformation of the glass.
また、ガラス板に沿って上昇する気流の幅方向での温度
ムラはガラス板が形成される場所（成形体上端部周辺）
でのガラスの温度ムラを生じ、成形されるガラス板の肉
厚の均一化を妨げることになる（すなわち、肉厚ムラが
生じる）。In addition, the temperature unevenness in the width direction of the airflow rising along the glass plate is caused by the area where the glass plate is formed (around the upper end of the molded body).
This causes unevenness in the temperature of the glass, which prevents the glass plate being formed from having a uniform thickness (that is, uneven thickness occurs).
特に、成形速度が比較的に遅い場合（単位時間当りの引
き抜き量が少ない場合）は、ガラスが短い距離進んだだ
けでガラスの温度が周囲温度とほぼ同じになり、またガ
ラスの放散熱量が雰囲気温度の上昇に寄与する割合が減
少するので、それだけ周囲温度の影響を受は易くなる。In particular, when the forming speed is relatively slow (when the amount of drawing per unit time is small), the temperature of the glass becomes almost the same as the ambient temperature even after the glass advances a short distance, and the amount of heat dissipated by the glass becomes Since the proportion contributing to the rise in temperature decreases, it becomes more susceptible to the influence of ambient temperature.
そこで、急冷を防ぐために、冷却雰囲気温度（炉室的温
度）を高くする必要があるが、そのための加熱により、
空気の対流が一層増長される。また、周囲温度の影響を
受は易くなることから、引張り方向でのガラス温度勾配
をなだらかにすることが困難になる。Therefore, in order to prevent rapid cooling, it is necessary to increase the cooling atmosphere temperature (furnace temperature), but due to the heating for this purpose,
Air convection is further enhanced. In addition, since it is easily influenced by the ambient temperature, it becomes difficult to make the glass temperature gradient in the pulling direction gentle.
更に、成形体を離れ、１枚の板状になったガラスは、徐
冷点近くになるまで表面張力によってその幅が狭まると
共に、幅方向の肉厚分布が平坦にならず、中央から両端
に向かって厚くなる傾向が生じる。そこで、従来は、成
形板幅および厚みの等しい平坦部を広く確保するため、
ナールロール等で板の耳部（幅方向側端部）を挟む方法
が用いられて来た。ナールロールは有効な方法であるが
、単位時間当りの引き抜き量が少ない場合には、ガラス
の冷え過ぎによる接触部からの割れや炉内の空気の対流
の発生源になる等の問題を持っている。Furthermore, when the glass leaves the molded body and becomes a single plate, its width narrows due to surface tension until it approaches the annealing point, and the thickness distribution in the width direction does not become flat, and the glass spreads from the center to both ends. There is a tendency for the thickness to increase. Therefore, in the past, in order to secure a wide flat part with the same width and thickness of the molded plate,
A method has been used in which the edges (ends in the width direction) of the board are sandwiched between knurl rolls or the like. Knurl rolls are an effective method, but if the amount of material pulled out per unit time is small, there are problems such as cracking at the contact area due to the glass cooling too much, and causing convection of air in the furnace. There is.
本発明は、上記問題点乃至欠点を除去するためになされ
たものであり、その目的はガラス板冷却時に空気の対流
の影響を受けに＜＜シ、ガラス板の幅方向の肉厚分布の
ムラを抑え、かつ徐冷過程での変形を抑えると共に、成
形板幅の収縮を抑え、厚みの等しい平坦部を広く確保す
ることができるガラス板の製造装置を提供することであ
る。The present invention has been made in order to eliminate the above-mentioned problems and drawbacks, and its purpose is to eliminate unevenness in the thickness distribution of the glass plate in the width direction due to the influence of air convection during cooling of the glass plate. An object of the present invention is to provide a glass plate manufacturing apparatus capable of suppressing deformation during the slow cooling process, suppressing shrinkage of the formed plate width, and ensuring a wide flat part of equal thickness.
本発明は上記目的を達成するために、溶融ガラスを板状
に成形する成形体と、冷却された該板状ガラスを引き抜
く引張りローラとを備え、この成形体と引張りローラが
上下方向に間隔をおいて配置されている、ガラス板の製
造装置において、成形体の下方に、金属製または耐火物
製の遮断板をガラス板の両側からこのガラス板と平行に
接近させて配置したことを特徴としている。In order to achieve the above object, the present invention includes a molded body for forming molten glass into a plate shape, and a tension roller that pulls out the cooled glass plate, and the molded body and the tension roller are spaced apart from each other in the vertical direction. A glass plate manufacturing apparatus, which is located at There is.
その際、遮断板の幅が、成形されるガラス板の幅よりも
狭くなっていることが望ましい。In this case, it is desirable that the width of the blocking plate is narrower than the width of the glass plate to be formed.
更に、遮断板が、力′ラス仮の幅方向の収縮がほぼ終了
するまでは、成形されるガラス板の幅よりも狭く形成さ
れ、それ以降はガラス仮の両端まで覆うように幅が広く
形成されていることが望ましい。Furthermore, the blocking plate is formed to be narrower than the width of the glass plate to be formed until the shrinkage in the width direction of the temporary glass plate is almost completed, and after that, it is formed to be wider so as to cover both ends of the temporary glass plate. It is desirable that the
更に、遮断板が成形されるガラス板の幅全体を覆うよう
に形成され、ガラス板の幅方向の収縮がほぼ終了するま
では、ガラス板の両端部分を覆う遮断板の部分が、遮断
板の他の部分よりも熱線の吸収が良くかつ熱伝導率の大
きな材質からなっていることが望ましい。Furthermore, the blocking plate is formed to cover the entire width of the glass plate to be molded, and the portion of the blocking plate that covers both ends of the glass plate is It is desirable that the material is made of a material that absorbs heat rays better than other parts and has a higher thermal conductivity.
更に、遮断板が成形されるガラス板の幅全体を覆うよう
に形成され、ガラス板の両端部分を覆う遮断板の部分が
、遮断板の他の部分よりも熱線の吸収が良くかつ熱伝導
率の大きな材質からなっていることが望ましい。Furthermore, the shielding plate is formed to cover the entire width of the glass plate on which it is formed, and the part of the shielding plate that covers both ends of the glass plate absorbs heat rays better than other parts of the shielding plate and has a higher thermal conductivity. It is desirable that the material be made of a large material.
ガラス板に接近させて配置された遮断板は、炉室内に発
生する対流からガラス板を保護し、対流の影響を受けに
くくする。更に、ガラス板の幅方向の温度分布を均一に
すると共に、ガラス表面からの放熱量を抑えて縦方向の
温度勾配をなだらかにするため、幅方向の肉厚ムラを抑
え、ガラス板の変形を抑える。また、遮断板の中央部と
両端部の材質を変えることにより、耳部の早期冷却を促
し、ガラス板の幅の収縮が抑えられる。The shielding plate placed close to the glass plate protects the glass plate from convection generated within the furnace chamber and makes it less susceptible to convection. Furthermore, in addition to making the temperature distribution uniform in the width direction of the glass plate, it suppresses the amount of heat dissipated from the glass surface and smooths the temperature gradient in the vertical direction, thereby suppressing uneven thickness in the width direction and preventing deformation of the glass plate. suppress. In addition, by changing the materials of the center and both ends of the shielding plate, early cooling of the ears is promoted and shrinkage of the width of the glass plate is suppressed.
次に、図に示したダウンドロ一方式のガラス板製造装置
の実施例に基づいて本発明の詳細な説明する。Next, the present invention will be described in detail based on an embodiment of a down-draw type glass plate manufacturing apparatus shown in the drawings.
第１図はガラス板製造装置の縦断面を概略的に示す図、
第２図は第１図のｆｆ−［線の矢印方向に見た正面図で
ある０図において、１は耐火レンガからなる炉壁、２は
断面がほぼくさび状の成形体である９図示の成形体２は
溶融ガラス３を収容する凹部２ａを有するいわゆるフィ
ーディングセルと称されるものであるが、他の種類のも
のを用いてもよい、成形体２の凹部２ａは第２図に示す
ように溶融ガラス供給管４に接続されている。この溶融
ガラス供給管４から凹部２ａに供給された溶融ガラス３
は凹部２ａの上側スリット状開口から溢れ、成形体２の
両側面に沿って流下し、成形体２の下端部で合流する０
合流した溶融ガラス３は炉室５内で直ちに冷却されてガ
ラス板３′となり、引張りローラ６によって下方へ引き
抜かれる。FIG. 1 is a diagram schematically showing a longitudinal section of a glass plate manufacturing apparatus;
FIG. 2 is a front view of FIG. 1 as seen in the direction of the arrow ff-[. In FIG. The molded body 2 is a so-called feeding cell having a recess 2a for accommodating the molten glass 3, but other types of cells may be used.The recess 2a of the molded body 2 is shown in FIG. It is connected to the molten glass supply pipe 4 in this manner. Molten glass 3 supplied from this molten glass supply pipe 4 to the recess 2a
0 overflows from the upper slit-shaped opening of the recess 2a, flows down along both sides of the molded body 2, and merges at the lower end of the molded body 2.
The merged molten glass 3 is immediately cooled in the furnace chamber 5 to form a glass plate 3', which is pulled downward by a pulling roller 6.
ガラス板３′を冷却する範囲、すなわち成形体２と引張
りローラ６の間の範囲には更に、耐火性の遮断板７がガ
ラス板３′の両側に、ガラス板３′に接近させてかつガ
ラス板３゛と平行に設けられている。この遮断板７は炉
室５内に発生する対流からガラス板３′を保護すると共
に、ガラス板３′から受けた熱を炉室５内の空気に伝導
する働きをする。なお、遮断板７とガラス板３′の間隔
は好ましくは３１以下、特に０．５〜２■である。In the area where the glass pane 3' is to be cooled, ie between the shaped body 2 and the tension roller 6, fire-resistant barrier plates 7 are furthermore provided on both sides of the glass pane 3', close to the glass pane 3' and close to the glass pane 3'. It is installed parallel to plate 3. This shielding plate 7 serves to protect the glass plate 3' from convection generated within the furnace chamber 5 and to conduct heat received from the glass plate 3' to the air within the furnace chamber 5. The distance between the shielding plate 7 and the glass plate 3' is preferably 31 cm or less, particularly 0.5 to 2 cm.
遮断板７の材質は、熱膨張による反りを生じにくいもの
、すなわち熱膨張率の小さいものが望ましい。また、ガ
ラス板３′から遮断板７を経て炉室５内の空気に熱を逃
がす量（これは単位時間当りのガラス板製造量に比例す
る）に応じて、熱伝導率の異なる材質を選定することが
望ましい。すなわち、製造量が少ない場合には、熱伝導
率の小さな断熱材（セラミックファイバ製板等）が好ま
しく、製造量が多い場合には、熱伝導率の大きなＳｉＣ
板等が好ましい。また、遮断板７の厚さについても同様
であり、製造量が少ない場合には、熱を伝導しにくい厚
いものを選択し、製造量が多い場合には、熱を伝導しや
すい薄いものを選択することが望ましい。The material of the shielding plate 7 is desirably one that does not easily warp due to thermal expansion, that is, one that has a small coefficient of thermal expansion. In addition, materials with different thermal conductivities are selected depending on the amount of heat released from the glass plate 3' to the air in the furnace chamber 5 via the shield plate 7 (this is proportional to the amount of glass plate manufactured per unit time). It is desirable to do so. In other words, if the production volume is small, a heat insulating material with low thermal conductivity (ceramic fiber plate, etc.) is preferable, and if the production volume is large, SiC with high thermal conductivity is preferable.
A plate or the like is preferable. The same applies to the thickness of the shield plate 7; if the production volume is small, choose a thick one that conducts heat less easily, and if the production volume is large, choose a thin one that conducts heat easily. It is desirable to do so.
遮断板７の幅すは第２図に示すように、ガラス板３′の
幅Ｂよりもやや狭くなっている。これにより、成形され
たガラス板の両端には通常、“耳部と呼ばれる厚内部が
あるが、これを避けて遮断板７をガラスｖｉ、３’にで
きるだけ接近させることができる。また、溶融状態のガ
ラス３を板状に成形する際には、両端部を早期に冷却す
ると、両端部の肉の厚い“耳“部の粘度が増し、表面張
力によって生じる幅方向の縮小を抑制することができる
という利点があり、この点からも遮断板７の幅すをガラ
ス板３′の幅Ｂよりも狭くすることが望ましい、すなわ
ち、遮断板７で覆わ′れた部分の冷却速度は覆われてい
ない仮両端部より遅くなり、結果的に両端部を早く冷却
したのと同じ効果が得られる。As shown in FIG. 2, the width of the blocking plate 7 is slightly narrower than the width B of the glass plate 3'. This allows the shielding plate 7 to be brought as close as possible to the glass vi, 3' while avoiding the thick interior called "edges" at both ends of the formed glass plate. When forming the glass 3 into a plate shape, if both ends are cooled early, the viscosity of the thick "lugs" at both ends will increase, and shrinkage in the width direction caused by surface tension can be suppressed. From this point of view as well, it is desirable to make the width of the shielding plate 7 narrower than the width B of the glass plate 3'.In other words, the cooling rate of the portion covered by the shielding plate 7 is lower than the width B of the glass plate 3'. It is slower than the temporary ends, and as a result, the same effect as cooling both ends quickly can be obtained.
遮断板７は支持棒８を介して手動でまたは適当な操作装
置によって第１図に示す矢印方向に移動させることが可
能であり、それによってガラス板３′との間隔を単独に
調整することができる。The blocking plate 7 can be moved via the support rod 8 manually or by means of a suitable operating device in the direction of the arrow shown in FIG. 1, so that the distance from the glass plate 3' can be adjusted independently. can.
前記の遮断板７は、ガラス板３′に沿った上方への空気
の対流からガラス板３′を保護するので、対流によるガ
ラス板３′の不均一な冷却を抑え、ひいてはガラス板３
′に局部的歪を生ぜず、変形を防止すると共に、幅方向
の温度分布を均一にするので、肉厚ムラの発生を抑制す
る。更に、遮断板７のために熱を伝導しやすい材質を選
択すると、遮断板７が均熱板の役割をするため、ガラス
板３′内の温度差を一層小さくすることができる。更に
、ガラス板３′と接している空気の容積が小さく、温度
が上がるため、ガラス板３′の冷却速度が抑えられる。The shielding plate 7 protects the glass plate 3' from upward air convection along the glass plate 3', thereby suppressing uneven cooling of the glass plate 3' due to convection, and thus
It does not cause any local strain on the wall, prevents deformation, and makes the temperature distribution uniform in the width direction, thereby suppressing the occurrence of wall thickness unevenness. Furthermore, if a material that easily conducts heat is selected for the shielding plate 7, the shielding plate 7 functions as a heat equalizing plate, so that the temperature difference within the glass plate 3' can be further reduced. Furthermore, since the volume of air in contact with the glass plate 3' is small and the temperature rises, the cooling rate of the glass plate 3' is suppressed.
これは単位時間当りの製造量が少ない場合に有効である
。This is effective when the amount of production per unit time is small.
上記のガラス板製造装置を用いて、幅４００ ｍｍ、厚
み１閣のガラス板３′を日産６００ ｋｇで製造する際
に、厚み５０ｍｍのセラミックファイバ製遮断板７をガ
ラス［３’に３閣以内の距離で設置したところ、２５０
ｍｍ四方の範囲における反りの最大値は、設置しない
従来の場合の４００ ｐｍから２００μｍに減少した。When manufacturing a glass plate 3' with a width of 400 mm and a thickness of 1 inch using the above-mentioned glass plate manufacturing equipment at a daily production rate of 600 kg, a ceramic fiber shield plate 7 with a thickness of 50 mm is attached to the glass plate [3' with a thickness of 3 mm or less]. When installed at a distance of 250
The maximum value of warpage in a square mm area was reduced from 400 pm in the conventional case without installation to 200 μm.
第３図は他の実施例を示している。この実施例の場合に
は、引張りローラ６の下側に、他の遮断板７ａが設けら
れている。この遮断板７ａは前記実施例における遮断板
７と同様に、幅がガラス板３′の幅よりも狭く、そして
支持棒８によってガラス板３′の両側にガラス板３′と
平行に支持されている。この遮断板７ａはガラス板３′
の変形や割れを防ぐ効果がある。FIG. 3 shows another embodiment. In this embodiment, another blocking plate 7a is provided below the tension roller 6. This blocking plate 7a, like the blocking plate 7 in the previous embodiment, has a width narrower than the width of the glass plate 3', and is supported by support rods 8 on both sides of the glass plate 3' in parallel with the glass plate 3'. There is. This shielding plate 7a is a glass plate 3'
It has the effect of preventing deformation and cracking.
第４図に示す他の実施例の場合には、前記遮断板７の両
端部に、ガラス板３′の両端部を覆う両端遮断板７ｂが
ガラス板３′の両側にガラス板３′と平行に取付けられ
ている。この両端遮断板７ｂは中央の遮断板７よりも短
くなっている。すなわち、ガラス板３′の幅の収縮がほ
ぼ終了する付近までは、両端遮断板７ｂは設けられてい
ない、中央遮断板７と両端遮断板７ｂは共に、ステンレ
ス鋼からなり、第４図に示すように別体に作ってボルト
９等によって互いに連結してもよく、また−体に作って
もよい。In the case of another embodiment shown in FIG. 4, both end blocking plates 7b covering both ends of the glass plate 3' are provided at both ends of the blocking plate 7, parallel to the glass plate 3'. installed on. The both end blocking plates 7b are shorter than the central blocking plate 7. That is, the both end blocking plates 7b are not provided until the width of the glass plate 3' has almost finished shrinking. Both the central blocking plate 7 and the both end blocking plates 7b are made of stainless steel, as shown in FIG. They may be made as separate bodies and connected to each other with bolts 9 or the like, or they may be made as a body.
この実施例によるガラス板製造装置を用いて、幅４００
ｍｍ Ｓ厚ミＩｍｒａ（Ｄガ−７ス板３′を日産６００
ｋｇで製造する際に、厚み５ｍｍのステンレス鋼製遮
断４７ｉ７．７ｂ（中央遮断板７は長さ３ｏｏｍｌＩ＋
、幅４４０■で、両端遮断板７ｂはそれぞれ長さ２０ｋ
ｍ 、幅５５ｍｍ ）を、ガラス板３′に３ｍｍ以内の
距離で設置したところ、２５０ｏ＋ｎ＋四方の範囲にお
ける反りの最大値は、設置しない従来の場合の４００μ
ｍから２００μｍに、幅方向の肉厚変動は５０μ田から
２０μｍ以内へと減少した。Using the glass plate manufacturing apparatus according to this embodiment, a width of 400
mm S thickness Imra (D girth plate 3' for Nissan 600
kg, the stainless steel barrier 47i7.7b with a thickness of 5mm (the central barrier plate 7 has a length of 3oomlI+
, width 440cm, and both end blocking plates 7b each have a length of 20k.
m, width 55 mm) was installed on the glass plate 3' within a distance of 3 mm, the maximum value of warpage in the 250 o + n + square area was 400 μ in the conventional case without installation.
From m to 200 μm, the thickness variation in the width direction decreased from 50 μm to within 20 μm.
第５図に示す他の実施例の場合には、第４図の実施例に
おける中央遮断板７と両端遮断板７ｂに加えて、ガラス
板３′の幅の収縮がほぼ終了するまでは、他の両端遮断
板７ｃがボルト９等によって取付けられて設けられてい
る。この両端遮断板７Ｃはステンレス鋼よりも熱線の吸
収が良く、熱伝導率の大きな材質、例えばＳｉＣからな
っている。それによって、ガラス板３′の耳部の早期冷
却を促し、耳部以外のガラス板の幅の収縮を抑えること
ができる。なお、ガラス板３′の製造量が多い場合には
、両端遮断板７ｃだけでなく、両端遮断板７ｂも、熱線
の吸収が良く、熱伝導率の大きな材質、例えばＳｉＣか
ら構成することが望ましい。In the case of the other embodiment shown in FIG. 5, in addition to the center blocking plate 7 and both end blocking plates 7b in the embodiment shown in FIG. Both end blocking plates 7c are attached by bolts 9 or the like. The both-end blocking plates 7C are made of a material that absorbs heat rays better than stainless steel and has a high thermal conductivity, such as SiC. Thereby, early cooling of the edge of the glass plate 3' can be promoted, and shrinkage of the width of the glass plate other than the edge can be suppressed. In addition, when a large quantity of the glass plate 3' is manufactured, it is desirable that not only the both-end blocking plates 7c but also the both-end blocking plates 7b be made of a material that absorbs heat rays well and has a high thermal conductivity, such as SiC. .
以上、本発明の実施例について説明したが、本発明は上
記実施例に限定されるものではなく、例えば遮断板の形
状は適宜に定めることができる。Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and, for example, the shape of the shielding plate can be determined as appropriate.
以上説明したように、本発明は、遮断板をガラス板に接
近させて配置し、冷却雰囲気内に発生する対流からガラ
ス板を保護するようにしたので、対流によるガラス板の
不均一な冷却を抑え、ひいては局部的束を生ぜず、変形
を防止すると共に、肉厚ムラの発生を抑制するという優
れた効果を奏する。As explained above, in the present invention, the shielding plate is placed close to the glass plate to protect the glass plate from convection generated in the cooling atmosphere, thereby preventing uneven cooling of the glass plate due to convection. This has the excellent effect of preventing deformation without causing local bundles, and suppressing the occurrence of wall thickness unevenness.
第１図は本発明の実施例によるガラス板製造装置の概略
縦断面図、第２図は第１図に示したガラス板製造装置の
■−■線の矢印方向に見た正面図、第３図は第２実施例
によるガラス板製造装置の正面図、第４図は第３実施例
によるガラス板製造装置の正面図、第５図は第４実施例
によるガラス板製造装置の正面図である。
１・・・炉壁、 ２・・・成形体、 ２ａ・・・凹部、
３・・・溶融ガラス、 ３′ ・・・ガラス板、
４・・・溶融ガラス供給管、 ５・・・炉室、
６・・・引張りローラ、 ７，７ａ７ｂ ７ｃ・・・
遮断板、 ８・・・支持棒、９・・・ボルト、 Ｂ・
・・ガラス板の幅、 ｂ・・・遮断板の輻
出願人 ホ − ヤ 株式会社
代理人 弁理士 中 村 静 男
第
図
第
図
第
図FIG. 1 is a schematic vertical sectional view of a glass plate manufacturing apparatus according to an embodiment of the present invention, FIG. 2 is a front view of the glass plate manufacturing apparatus shown in FIG. The figure is a front view of a glass plate manufacturing apparatus according to a second embodiment, FIG. 4 is a front view of a glass plate manufacturing apparatus according to a third embodiment, and FIG. 5 is a front view of a glass plate manufacturing apparatus according to a fourth embodiment. . DESCRIPTION OF SYMBOLS 1... Furnace wall, 2... Molded object, 2a... Recessed part,
3... Molten glass, 3'... Glass plate,
4... Molten glass supply pipe, 5... Furnace chamber,
6...Tension roller, 7,7a7b 7c...
Blocking plate, 8... Support rod, 9... Bolt, B.
... Width of the glass plate, b... Radiation of the shielding plate
Claims (1)
該板状ガラスを引き抜く引張りローラとを備え、この成
形体と引張りローラが上下方向に間隔をおいて配置され
ている、ガラス板の製造装置において、 成形体の下方に、金属製または耐火物製の遮断板をガラ
ス板の両側からこのガラス板と平行に接近させて配置し
たことを特徴とするガラス板の製造装置。 ２、遮断板の幅が、成形されるガラス板の幅よりも狭い
ことを特徴とする、請求項１記載のガラス板の製造装置
。 ３、遮断板が、ガラス板の幅方向の収縮が実質的に終了
するまでは、成形されるガラス板の幅よりも狭く形成さ
れ、それ以降はガラス板の両端まで覆うように幅が広く
形成されていることを特徴とする、請求項１記載のガラ
ス板の製造装置。 ４、遮断板が成形されるガラス板の幅全体を覆うように
形成され、ガラス板の幅方向の収縮が実質的に終了する
までは、ガラス板の両端部分を覆う遮断板の部分が、遮
断板の他の部分よりも熱線の吸収が良くかつ熱伝導率の
大きな材質からなっていることを特徴とする、請求項１
記載のガラス板の製造装置。 ５、遮断板が成形されるガラス板の幅全体を覆うように
形成され、ガラス板の両端部分を覆う遮断板の部分が、
遮断板の他の部分よりも熱線の吸収が良くかつ熱伝導率
の大きな材質からなっていることを特徴とする、請求項
１記載のガラス板の製造装置。[Claims] 1. A molded body for forming molten glass into a plate shape, and a tension roller that pulls out the cooled glass plate, and the molded body and the tension roller are arranged with an interval in the vertical direction. A glass plate manufacturing apparatus according to the present invention, characterized in that a metal or refractory shielding plate is arranged below the molded body in parallel with and approaching the glass plate from both sides of the glass plate. manufacturing equipment. 2. The glass plate manufacturing apparatus according to claim 1, wherein the width of the blocking plate is narrower than the width of the glass plate to be molded. 3. The blocking plate is formed to be narrower than the width of the glass plate to be formed until the shrinkage in the width direction of the glass plate is substantially completed, and after that, the shield plate is formed to be wider so as to cover both ends of the glass plate. The glass plate manufacturing apparatus according to claim 1, characterized in that: 4. The blocking plate is formed to cover the entire width of the glass plate to be formed, and until the shrinkage of the glass plate in the width direction is substantially completed, the portion of the blocking plate that covers both ends of the glass plate is blocked. Claim 1: The plate is made of a material that absorbs heat rays better than other parts of the plate and has a higher thermal conductivity.
A manufacturing apparatus for the glass plate described above. 5. The shielding plate is formed to cover the entire width of the glass plate on which the shielding plate is formed, and the part of the shielding plate that covers both ends of the glass plate is
2. The glass plate manufacturing apparatus according to claim 1, wherein the shielding plate is made of a material that absorbs heat rays better and has higher thermal conductivity than other parts of the shielding plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30301588 | 1988-11-30 | ||
| JP63-303015 | 1988-11-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02225326A true JPH02225326A (en) | 1990-09-07 |
| JP2572444B2 JP2572444B2 (en) | 1997-01-16 |
Family
ID=17915912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1138093A Expired - Lifetime JP2572444B2 (en) | 1988-11-30 | 1989-05-31 | Glass plate manufacturing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2572444B2 (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001007372A1 (en) * | 1999-07-22 | 2001-02-01 | Nh Techno Glass Corporation | Production method and device for sheet glass, and liquid crystal device |
| KR100524842B1 (en) * | 2002-09-25 | 2005-10-28 | 삼성코닝정밀유리 주식회사 | Method for the preparation of a plate glass having a low residual stress |
| WO2006135585A3 (en) * | 2005-06-10 | 2007-02-15 | Corning Inc | Selective contact with a continuously moving ribbon of brittle material to dampen or reduce propagation or migration of vibrations along the ribbon while cutting |
| WO2008050606A1 (en) | 2006-10-24 | 2008-05-02 | Nippon Electric Glass Co., Ltd. | Glass ribbon producing apparatus and process for producing the same |
| JP2008209906A (en) * | 2007-01-29 | 2008-09-11 | Nippon Electric Glass Co Ltd | Glass substrate for display |
| JP2010269998A (en) * | 2009-05-21 | 2010-12-02 | Corning Inc | Equipment for reducing radiant heat loss from molded bodies in glass forming process |
| JP2011522764A (en) * | 2008-03-31 | 2011-08-04 | コーニング インコーポレイテッド | Heating apparatus, system and method for stabilizing sheet material |
| JP2012211079A (en) * | 2010-09-30 | 2012-11-01 | Avanstrate Inc | Method for manufacturing glass plate |
| WO2013105667A1 (en) * | 2012-01-13 | 2013-07-18 | ＡｖａｎＳｔｒａｔｅ株式会社 | Manufacturing device and molding device for glass substrate |
| TWI414492B (en) * | 2010-09-30 | 2013-11-11 | Avanstrate Inc | Manufacture of glass plates |
| JP2014043356A (en) * | 2012-08-24 | 2014-03-13 | Nippon Electric Glass Co Ltd | Method for manufacturing glass plate and apparatus for manufacturing glass plate |
| JP2015124143A (en) * | 2013-12-27 | 2015-07-06 | ＡｖａｎＳｔｒａｔｅ株式会社 | Production method of glass plate and production device of glass plate |
| US9108873B2 (en) | 2011-03-31 | 2015-08-18 | Avanstrate Inc. | Glass-substrate manufacturing method and glass-substrate manufacturing device |
| WO2016052426A1 (en) * | 2014-09-30 | 2016-04-07 | ＡｖａｎＳｔｒａｔｅ株式会社 | Method for manufacturing glass substrate and device for manufacturing glass substrate |
-
1989
- 1989-05-31 JP JP1138093A patent/JP2572444B2/en not_active Expired - Lifetime
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001007372A1 (en) * | 1999-07-22 | 2001-02-01 | Nh Techno Glass Corporation | Production method and device for sheet glass, and liquid crystal device |
| US6758064B1 (en) | 1999-07-22 | 2004-07-06 | Nh Techno Glass Corporation | Production method and device for sheet glass, and liquid crystal device |
| KR100524842B1 (en) * | 2002-09-25 | 2005-10-28 | 삼성코닝정밀유리 주식회사 | Method for the preparation of a plate glass having a low residual stress |
| WO2006135585A3 (en) * | 2005-06-10 | 2007-02-15 | Corning Inc | Selective contact with a continuously moving ribbon of brittle material to dampen or reduce propagation or migration of vibrations along the ribbon while cutting |
| WO2008050606A1 (en) | 2006-10-24 | 2008-05-02 | Nippon Electric Glass Co., Ltd. | Glass ribbon producing apparatus and process for producing the same |
| JP2008209906A (en) * | 2007-01-29 | 2008-09-11 | Nippon Electric Glass Co Ltd | Glass substrate for display |
| JP2011522764A (en) * | 2008-03-31 | 2011-08-04 | コーニング インコーポレイテッド | Heating apparatus, system and method for stabilizing sheet material |
| JP2010269998A (en) * | 2009-05-21 | 2010-12-02 | Corning Inc | Equipment for reducing radiant heat loss from molded bodies in glass forming process |
| JP2012211079A (en) * | 2010-09-30 | 2012-11-01 | Avanstrate Inc | Method for manufacturing glass plate |
| TWI414492B (en) * | 2010-09-30 | 2013-11-11 | Avanstrate Inc | Manufacture of glass plates |
| US8938992B2 (en) | 2010-09-30 | 2015-01-27 | Avanstrate Inc. | Method of manufacturing glass sheet |
| US9108873B2 (en) | 2011-03-31 | 2015-08-18 | Avanstrate Inc. | Glass-substrate manufacturing method and glass-substrate manufacturing device |
| WO2013105667A1 (en) * | 2012-01-13 | 2013-07-18 | ＡｖａｎＳｔｒａｔｅ株式会社 | Manufacturing device and molding device for glass substrate |
| CN104024169A (en) * | 2012-01-13 | 2014-09-03 | 安瀚视特控股株式会社 | Manufacturing Device And Molding Device For Glass Substrate |
| CN104024169B (en) * | 2012-01-13 | 2016-12-21 | 安瀚视特控股株式会社 | The manufacture method of glass substrate and shaped device |
| JP2014043356A (en) * | 2012-08-24 | 2014-03-13 | Nippon Electric Glass Co Ltd | Method for manufacturing glass plate and apparatus for manufacturing glass plate |
| JP2015124143A (en) * | 2013-12-27 | 2015-07-06 | ＡｖａｎＳｔｒａｔｅ株式会社 | Production method of glass plate and production device of glass plate |
| WO2016052426A1 (en) * | 2014-09-30 | 2016-04-07 | ＡｖａｎＳｔｒａｔｅ株式会社 | Method for manufacturing glass substrate and device for manufacturing glass substrate |
| JP6007341B2 (en) * | 2014-09-30 | 2016-10-12 | ＡｖａｎＳｔｒａｔｅ株式会社 | Glass substrate manufacturing method and glass substrate manufacturing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2572444B2 (en) | 1997-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH02225326A (en) | Apparatus for producing glass plate | |
| TWI540106B (en) | Method and apparatus for controlling sheet thickness | |
| DE69618265T2 (en) | Vertical oven | |
| TWI571445B (en) | Glass substrate manufacturing method and cooler | |
| JPS5946894B2 (en) | Sheet or ribbon glass manufacturing equipment | |
| JP2001031434A (en) | Forming of plate glass and forming apparatus | |
| DE4208219C1 (en) | ||
| TWI564256B (en) | Apparatus for thermal decoupling of a forming body in a glass making process | |
| JP2604080B2 (en) | Glass plate manufacturing equipment | |
| US3301651A (en) | Glass-drawing apparatus including reheating means for producing flat sheets | |
| EP1196357B1 (en) | Device for heating plates of glass | |
| PT94435B (en) | DEVICE FOR TEMPERING BY CONTACTING GLASS | |
| US3575694A (en) | Method of manufacturing tapered glass | |
| JPH0345015B2 (en) | ||
| JPH02149437A (en) | Glass plate production device | |
| CA1192747A (en) | Pressure sizing of float glass | |
| CN216273743U (en) | Stress relieving device and annealing device for flexible glass | |
| US3473911A (en) | Adjustable orifice apparatus for forming glass films | |
| SU1020001A3 (en) | Apparatus for making wire reinforced glass | |
| JPH0753223A (en) | Float glass manufacturing method and manufacturing apparatus | |
| US3340031A (en) | Seal for and method of packing joints in a glass furnace | |
| JPS5851761B2 (en) | High temperature slab conveyor | |
| CA1199177A (en) | Auxiliary side heater for a float glass forming chamber | |
| JPH0246533B2 (en) | ||
| US3930827A (en) | Method and apparatus for stabilizing movement of glass during its advance along a molten metal surface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081024 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091024 Year of fee payment: 13 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091024 Year of fee payment: 13 |