JP5434578B2 - Cooling rare of float glass manufacturing equipment - Google Patents

Cooling rare of float glass manufacturing equipment Download PDF

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Publication number
JP5434578B2
JP5434578B2 JP2009295979A JP2009295979A JP5434578B2 JP 5434578 B2 JP5434578 B2 JP 5434578B2 JP 2009295979 A JP2009295979 A JP 2009295979A JP 2009295979 A JP2009295979 A JP 2009295979A JP 5434578 B2 JP5434578 B2 JP 5434578B2
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float glass
room
cooling
rare
cooling rare
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JP2011136847A (en
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勝之 中野
健太郎 龍腰
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AGC Inc
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Asahi Glass Co Ltd
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Priority to JP2009295979A priority Critical patent/JP5434578B2/en
Priority to TW99142434A priority patent/TWI466834B/en
Priority to KR1020100133012A priority patent/KR101383955B1/en
Priority to CN2010106230761A priority patent/CN102108006A/en
Publication of JP2011136847A publication Critical patent/JP2011136847A/en
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    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B18/00Shaping glass in contact with the surface of a liquid
    • C03B18/02Forming sheets
    • C03B18/20Composition of the atmosphere above the float bath; Treating or purifying the atmosphere above the float bath
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B25/00Annealing glass products
    • C03B25/04Annealing glass products in a continuous way
    • C03B25/06Annealing glass products in a continuous way with horizontal displacement of the glass products
    • C03B25/08Annealing glass products in a continuous way with horizontal displacement of the glass products of glass sheets
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/50Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57Improving the yield, e-g- reduction of reject rates

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  • 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

本発明は、フロートガラス製造における徐冷後の冷却レアに関する。   The present invention relates to a cooling rare after slow cooling in float glass production.

フロートガラスは、溶融ガラス作製領域で製造された溶融ガラスをフロートバスの溶融スズ上に供給してリボン状ガラスに成形し、成形されたリボン状ガラスをフロートバスから引き出した後、徐冷炉でガラスの歪点温度以下に徐冷し、さらに冷却レアで切断可能な温度まで冷却して切断装置によって所定のサイズに切断される(特許文献1図3参照)。   Float glass is prepared by supplying the molten glass produced in the molten glass production area onto the molten tin of the float bath, forming it into a ribbon-like glass, drawing the formed ribbon-like glass out of the float bath, It is gradually cooled below the strain point temperature, further cooled to a temperature that can be cut with a cooling rare, and cut into a predetermined size by a cutting device (see FIG. 3 of Patent Document 1).

図4は上記フロートガラスの製造から切断までの工程を概略に示したものである。図4に示す如く、フロートバス43の溶融スズ42上でリボン状に成形されたフロートガラス41は、フロートバス43の出口に設けられたリフトアウト部44に設置されているリフトアウトロール48によって溶融スズ上から引き上げられ、リフトアウト部44の下流に隣接して配置されている徐冷炉45に搬送される。徐冷炉45は囲い構造51を持つ温度調整可能な設備で200m近くに及ぶ長さを有し、内部に設置されている搬送ロール(搬送装置)47でフロートガラス41を搬送する間にガラスの歪点温度以下まで徐々に冷却する。徐冷炉45において徐冷されたフロートガラス41は、徐冷炉45の出口においてまだ約150〜300℃の高温を有している。   FIG. 4 schematically shows the steps from manufacture to cutting of the float glass. As shown in FIG. 4, the float glass 41 formed in a ribbon shape on the molten tin 42 of the float bath 43 is melted by a lift-out roll 48 installed in a lift-out portion 44 provided at the exit of the float bath 43. The steel is pulled up from the top of the tin and conveyed to the slow cooling furnace 45 disposed adjacent to the downstream of the lift-out portion 44. The slow cooling furnace 45 is a temperature-adjustable facility having an enclosure structure 51 and has a length of nearly 200 m. While the float glass 41 is being transported by a transport roll (transport device) 47 installed therein, the glass strain point Cool gradually to below the temperature. The float glass 41 gradually cooled in the slow cooling furnace 45 still has a high temperature of about 150 to 300 ° C. at the outlet of the slow cooling furnace 45.

このような高温のフロートガラス41は、徐冷炉45の下流に連続している冷却レア46に搬送され、該冷却レア46を搬送される間に切断可能な室温付近の温度まで冷却されたあと、冷却レア46の下流の切断作業場において切断装置55によって切断される。   Such a high-temperature float glass 41 is conveyed to a cooling rare 46 that is continuous downstream of the slow cooling furnace 45, cooled to a temperature near room temperature that can be cut while being conveyed, and then cooled. Cutting is performed by a cutting device 55 at a cutting work site downstream of the rare 46.

特開2009−155164号公報JP 2009-155164 A

従来の冷却レア46は、図4に示すように囲い構造を持たない搬送ロールだけの設備であるため、徐冷後の高温のフロートガラス41は、該冷却レア46の搬送ロールに乗載されて搬送される間に外気との接触によって自然放冷される。そのため、冷却レア46は徐冷炉45において徐冷されたフロートガラス41を切断可能な温度まで冷却するのに非常に長い距離が必要であり、約10〜200mの長さを有している。以下、このように囲い構造を持たない搬送ロールだけの従来の冷却レアを「オープン冷却レア」とする。   Since the conventional cooling rare 46 is a facility of only a conveyance roll having no enclosure structure as shown in FIG. 4, the high-temperature float glass 41 after the slow cooling is mounted on the conveyance roll of the cooling rare 46. It is naturally cooled by contact with outside air while being conveyed. Therefore, the cooling rare 46 requires a very long distance to cool the float glass 41 gradually cooled in the slow cooling furnace 45 to a temperature at which it can be cut, and has a length of about 10 to 200 m. Hereinafter, the conventional cooling rare of only the transport roll having no enclosure structure is referred to as “open cooling rare”.

オープン冷却レアを取り囲む雰囲気には外部や切断作業場から微細の粉塵等が飛散することがあり、フロートガラスはこのような粉塵等が飛散している雰囲気に曝されながら搬送される。そのため、フロートガラスの表面に雰囲気中の粉塵等が降りかかって付着する場合がある。特に、オープン冷却レアの上流域では、フロートガラスがまだ高温であるために、フロートガラスの表面に付着した粉塵等がガラスに固着しやすい。   In the atmosphere surrounding the open cooling rare, fine dust or the like may be scattered from the outside or a cutting work place, and the float glass is conveyed while being exposed to the atmosphere in which such dust or the like is scattered. Therefore, dust in the atmosphere may fall on the surface of the float glass and adhere to it. In particular, in the upstream region of the open cooling rare, since the float glass is still at a high temperature, dust or the like adhering to the surface of the float glass is likely to adhere to the glass.

また、オープン冷却レアではフロートガラスは自然放冷で冷却されるため、雰囲気の温度やガラスの種類によっては十分に冷却することが困難な場合が生じる。このような冷却不足を解消するために、局所的に空気を吹き付けて冷却しようとすると、冷却むらが生じて反りが発生し、フロートガラスの品質を低下させる。   Further, in the open cooling rare, the float glass is cooled by natural cooling, so that it may be difficult to sufficiently cool depending on the temperature of the atmosphere and the type of glass. In order to solve such a lack of cooling, when trying to cool by blowing air locally, cooling unevenness occurs, warping occurs, and the quality of the float glass is lowered.

本発明は、フロートガラスの表面に粉塵等が付着するのを防止し、かつフロートガラスの冷却をむらなく促進させるフロートガラス製造装置の冷却レアを提供することを目的とする。   An object of this invention is to provide the cooling rare of the float glass manufacturing apparatus which prevents that dust etc. adhere to the surface of float glass and accelerates | stimulates cooling of float glass uniformly.

本発明の一態様によれば、成形されたフロートガラスを徐冷する徐冷炉の下流側に配置され、該徐冷炉で徐冷された前記フロートガラスを搬送ロールで搬送しながら切断可能な温度まで冷却する冷却レアであって、該冷却レアは前記搬送ロールを囲む部屋を有し、該部屋に外気を供給するための供給部と前記部屋内の空気を外部に排出するための排出部とを設け、前記供給部が前記部屋の下流部に設けられ、前記排出部が前記部屋の上流部に設けられ、前記部屋内の圧力が前記部屋外の圧力に対し正圧に保持されていることを特徴とするフロートガラス製造装置の冷却レアを提供する。
また、本発明の別の一態様によれば、成形されたフロートガラスを徐冷する徐冷炉の下流側に配置され、該徐冷炉で徐冷された前記フロートガラスを搬送ロールで搬送しながら切断可能な温度まで冷却する冷却レアであって、該冷却レアは前記搬送ロールを囲む部屋を有し、該部屋に外気を供給するための供給部と前記部屋内の空気を外部に排出するための排出部とを設け、前記供給部および前記排出部が前記部屋の天井部に設けられ、前記部屋内の圧力が前記部屋外の圧力に対し正圧に保持されていることを特徴とするフロートガラス製造装置の冷却レアを提供する。
According to one aspect of the present invention, the float glass, which is disposed on the downstream side of the slow cooling furnace that gradually cools the formed float glass, is cooled to a temperature that can be cut while being transported by a transport roll. A cooling rare, the cooling rare has a room surrounding the transport roll, and a supply unit for supplying outside air to the room and a discharge unit for discharging the air in the room to the outside, The supply unit is provided in the downstream part of the room, the discharge part is provided in the upstream part of the room, and the pressure in the room is maintained at a positive pressure with respect to the pressure outside the part. The present invention provides a cooling rare for a float glass manufacturing apparatus.
Further, according to another aspect of the present invention, the float glass is disposed downstream of a slow cooling furnace that gradually cools the formed float glass, and can be cut while being transported by a transport roll. A cooling rare for cooling to a temperature, the cooling rare having a room surrounding the transport roll, a supply part for supplying outside air to the room, and a discharge part for discharging the air in the room to the outside And the supply section and the discharge section are provided on the ceiling of the room, and the pressure in the room is maintained at a positive pressure relative to the pressure outside the section. Provide cooling rares.

また、本発明は上記冷却レアを用いたフロートガラスの冷却方法を提供する。   Moreover, this invention provides the cooling method of the float glass using the said cooling rare.

本発明によれば、粉塵等がフロートガラスの表面に付着するのを防止でき、高品質のフロートガラスを得ることができる。   ADVANTAGE OF THE INVENTION According to this invention, it can prevent that dust etc. adhere to the surface of float glass, and can obtain high quality float glass.

さらに、フロートガラスを切断可能な温度までむらなく効率的に冷却でき、反りのないフロートガラスを得ることができる。   Furthermore, the float glass can be efficiently cooled evenly to a temperature at which the float glass can be cut, and a float glass without warping can be obtained.

本発明の好ましい実施形態に係る徐冷・冷却レアの断面説明図。Cross-sectional explanatory drawing of the slow cooling and cooling rare which concerns on preferable embodiment of this invention. 図1の徐冷・冷却レアのA−A部における平面図(半分のみ図示)。The top view in the AA part of the slow cooling and cooling rare of FIG. 1 (only half is shown). 図1の冷却レアの拡大図。The enlarged view of the cooling rare of FIG. 従来の徐冷・冷却レアの断面説明図。Cross-sectional explanatory drawing of the conventional slow cooling and cooling rare.

以下、本発明の実施形態について図面を参照して説明する。
図1は、本発明の好ましい実施形態に係る徐冷・冷却レアの断面説明図、図2はそのA−A部における平面図で、図2には徐冷・冷却レアの半分だけを図示しているが、図示しない半分もこれと対称をなしており同じである。図示するようにフロートバス3の溶融スズ2上でリボン状に成形されたフロートガラス1は、フロートバス3の出口に配置されたリフトアウト部4に設置されているリフトアウトロール8によって溶融スズ2から引き上げられ、リフトアウト部4に隣接して配置されている徐冷炉5に搬送される。リフトアウト部4内にはリフトアウトロール8のほか数本のロールが溶融スズ面より高いレベルに配置されており、フロートバス3でリボン状に成形されたフロートガラス1は、リフトアウトロール8によって引き上げられた後、囲い構造10を有するリフトアウト部4において冷却されて安定したリボン状ガラスとして徐冷炉5に送られる。
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional explanatory view of a slow cooling / cooling rare according to a preferred embodiment of the present invention, FIG. 2 is a plan view of the AA portion, and FIG. 2 shows only half of the slow cooling / cooling rare. However, the half (not shown) is symmetric with this and is the same. As shown in the drawing, the float glass 1 formed in a ribbon shape on the molten tin 2 of the float bath 3 is melted by the lift-out roll 8 installed in the lift-out portion 4 disposed at the outlet of the float bath 3. And is conveyed to a slow cooling furnace 5 disposed adjacent to the lift-out unit 4. In the lift-out part 4, several rolls other than the lift-out roll 8 are arranged at a level higher than the molten tin surface, and the float glass 1 formed into a ribbon shape by the float bath 3 is After being pulled up, it is cooled in the lift-out part 4 having the enclosure structure 10 and sent to the slow cooling furnace 5 as a stable ribbon-like glass.

徐冷炉5は、汎用されているものと同様に囲い構造11を持つ温度調整可能な設備で、内部にはフロートガラス1を搬送するための複数本の搬送ロール7が設置されている。これらの搬送ロール7は駆動モーター(不図示)によって駆動され、リボン状のフロートガラス1を搬送する。リフトアウト部4から搬送されてきたフロートガラス1は、該徐冷炉5において搬送ロール7で搬送されながら好ましくない熱応力が残らないようにガラスの歪点温度以下まで徐冷される。そして、通常は徐冷炉5の出口に達するときまでに、ガラスの歪点温度よりさらに低い温度になるまで冷却される。徐冷炉5で徐冷されたフロートガラス1は、次いで冷却レア6で切断可能な温度まで冷却された後、冷却レア6の川下に位置する切断作業場において切断装置15によって所定の大きさに切断される。本発明において、フロートガラス1の切断可能な温度は通常は室温付近の温度であるが、それより若干高い温度でもよい。   The slow cooling furnace 5 is a temperature-adjustable facility having an enclosure structure 11 as in a general-purpose one, and a plurality of transport rolls 7 for transporting the float glass 1 are installed therein. These transport rolls 7 are driven by a drive motor (not shown) to transport the ribbon-like float glass 1. The float glass 1 transported from the lift-out unit 4 is gradually cooled to a temperature equal to or lower than the strain point temperature of the glass so that undesirable thermal stress does not remain while being transported by the transport roll 7 in the slow cooling furnace 5. And normally, it cools until it becomes temperature lower than the strain point temperature of glass by the time of reaching the exit of the slow cooling furnace 5. The float glass 1 that has been slowly cooled in the slow cooling furnace 5 is then cooled to a temperature that can be cut by the cooling rare 6, and then cut to a predetermined size by a cutting device 15 at a cutting work site located downstream of the cooling rare 6. . In the present invention, the temperature at which the float glass 1 can be cut is usually around room temperature, but may be slightly higher.

本発明は、図1および図2に示すように冷却レア6の搬送ロール7を囲む部屋9を形成し、該部屋6に外気を供給するための供給部12と部屋内の空気を外部に排出するための排出部13を設け、さらに部屋内の圧力が部屋外の圧力に対し正圧に保持されることを特徴とする。   As shown in FIGS. 1 and 2, the present invention forms a room 9 that encloses the transport roll 7 of the cooling rare 6 and supplies a supply unit 12 for supplying outside air to the room 6 and discharges the air in the room to the outside. A discharge portion 13 is provided, and the pressure in the room is maintained at a positive pressure with respect to the outdoor pressure.

本発明において、冷却レア6に搬送ロール7を囲んで部屋9を設ける目的としては、外気中の粉塵等がフロートガラス1の表面に降りかかって付着するのを防ぐことが挙げられる。前記したように囲い構造を持たない従来のオープン冷却レアでは、冷却レアで冷却する間に外気中の粉塵等がフロートガラス1の表面に降りかかって付着することがあるが、本発明では冷却レア6の搬送ロール7で搬送中のフロートガラス1を部屋9で覆うことによって、フロートガラス1の表面に上方から降りかかる外気中の粉塵等を囲い構造で遮断し、粉塵等がフロートガラス1の表面に付着しないようにすることができる。さらに、他の目的としては、冷却レア6の搬送ロール7を囲んで部屋9を設け、該部屋9の内部に外気を供給して部屋の下流と上流との間をフロートガラス1に沿って流動させることによって、フロートガラス1を効率よく冷却するとともに、粉塵等が容易にフロートガラス1の表面に付着しないようにすることにある。従来のオープン冷却レアのように搬送ロールで搬送中のフロートガラスの周りの雰囲気が静止状態にあると、外気中の粉塵等がフロートガラス1の表面に付着しやすいが、部屋9の内部に導入した外気をこのように流動させることによって、粉塵等がフロートガラス1の表面に付着しにくくできる。   In the present invention, the purpose of providing the room 9 by enclosing the transport roll 7 in the cooling rare 6 is to prevent dust or the like in the outside air from falling on and adhering to the surface of the float glass 1. As described above, in the conventional open cooling rare having no enclosure structure, dust or the like in the outside air may fall on and adhere to the surface of the float glass 1 while being cooled with the cooling rare. By covering the float glass 1 being transported by the transport roll 7 with the room 9 in the room 9, dust or the like in the outside air that falls on the surface of the float glass 1 is blocked by a surrounding structure, and the dust etc. is blocked on the surface of the float glass 1. It can be prevented from sticking. As another object, a room 9 is provided so as to surround the transport roll 7 of the cooling rare 6, and outside air is supplied into the room 9 to flow between the downstream and upstream of the room along the float glass 1. Thus, the float glass 1 is efficiently cooled, and dust and the like are not easily adhered to the surface of the float glass 1. When the atmosphere around the float glass being transported by the transport roll is stationary like a conventional open cooling rare, dust in the outside air tends to adhere to the surface of the float glass 1, but it is introduced into the interior of the room 9. By allowing the outside air to flow in this way, dust and the like can be hardly attached to the surface of the float glass 1.

上記目的が満足に達成されるためには、上記部屋9は徐冷炉5の出口から切断装置15を用いて切断作業が実施される切断作業場までの搬送ロール7を囲むように、すなわち上記部屋9が冷却レア6の搬送ロール7の上流から下流までの全体を囲むように設けられることが好ましい。また、搬送ロール7の両側は搬送ロール7の上方ばかりでなく下方も囲むように設けられることが好ましい。この場合、部屋9の下部は建物の床面を利用できる。冷却レア6と切断作業場との間には、図1および図2に示すように冷却レア6を切断作業場から遮断するための仕切り壁17が設けられることが好ましい。このとき、該仕切り壁17までの搬送ロール7を囲むように部屋9を形成するのが好ましい。   In order to achieve the above-mentioned object satisfactorily, the room 9 surrounds the transport roll 7 from the outlet of the slow cooling furnace 5 to the cutting work place where the cutting work is performed using the cutting device 15, that is, the room 9 is It is preferable that the cooling rare 6 is provided so as to surround the whole of the conveyance roll 7 from the upstream side to the downstream side. Moreover, it is preferable that both sides of the conveyance roll 7 are provided so as to surround not only the upper side but also the lower side of the conveyance roll 7. In this case, the floor of the building can be used for the lower part of the room 9. Between the cooling rare 6 and the cutting work place, it is preferable to provide a partition wall 17 for blocking the cooling rare 6 from the cutting work place as shown in FIGS. 1 and 2. At this time, it is preferable to form the chamber 9 so as to surround the transport roll 7 up to the partition wall 17.

次に、冷却レア6に設けられる部屋9の構成とその操作について説明する。
図3は図1に示す上記部屋9を拡大して図示したものである。図3に示すように上記部屋9は、冷却レア6内を搬送ロール7で搬送されるフロートガラス1の上方と両側に空間を十分に確保できる大きさを有していることが好ましい。部屋9の大きさは、冷却レア6の長さと搬送ロール7の幅などに基づいて決められるため特定されないが、上記搬送ロール7の上方に1〜15m程度、両側(両脇)に0.5〜10m程度の空間が得られるようにすることが好ましい。搬送ロール7の上方と両側にこのような空間を持っていれば、部屋9内に導入された外気を該空間においてむらなく流動させてフロートガラス1を均一に冷却することができる。
Next, the configuration and operation of the room 9 provided in the cooling rare 6 will be described.
FIG. 3 is an enlarged view of the room 9 shown in FIG. As shown in FIG. 3, the room 9 preferably has a size that can sufficiently secure a space above and on both sides of the float glass 1 that is transported in the cooling rare 6 by the transport roll 7. The size of the room 9 is not specified because it is determined based on the length of the cooling rare 6 and the width of the transport roll 7, but is about 1 to 15 m above the transport roll 7 and 0.5 on both sides (both sides). It is preferable to obtain a space of about 10 m. If such a space is provided above and on both sides of the transport roll 7, the outside air introduced into the room 9 can flow evenly in the space to uniformly cool the float glass 1.

本発明において上記部屋9には、外気を部屋に供給するための供給部12と部屋内の空気を外部に排出するための排出部13が設けられる。そして、供給部12には、送風装置(送風用ファン)14が装備されている。該送風装置14は部屋9に外気を供給し、部屋内を外部に対し正圧にするための有効な手段である。送風装置14で外気を供給部12から部屋9に導入することによって、部屋内の空気は排出部13から自然排出されるが、排出部13にも排気用ファンを装備して部屋内の空気を積極的に排出してもよい。供給部12からの外気の供給量は、送風装置14の回転数の制御によって行うことができる。また、図示はしていないが、これら供給部12および排出部13に風量調節弁をそれぞれ設けて、部屋9に供給する外気の量と外部に排出する空気の量を調節することによって、冷却レア6の冷却能力を調整したり、あるいは部屋内の圧力を部屋外よりも正圧に保持して外部から粉塵等が部屋内に浸入しにくくすることができる。   In the present invention, the room 9 is provided with a supply unit 12 for supplying outside air to the room and a discharge unit 13 for discharging the air in the room to the outside. The supply unit 12 is equipped with a blowing device (fan for blowing) 14. The air blower 14 is an effective means for supplying outside air to the room 9 and making the inside of the room positive with respect to the outside. By introducing the outside air from the supply unit 12 to the room 9 by the blower 14, the air in the room is naturally discharged from the discharge unit 13, but the exhaust unit 13 is also equipped with an exhaust fan to remove the air in the room. It may be actively discharged. The amount of outside air supplied from the supply unit 12 can be controlled by controlling the rotational speed of the blower 14. Although not shown in the drawings, the supply unit 12 and the discharge unit 13 are respectively provided with air volume control valves to adjust the amount of outside air supplied to the room 9 and the amount of air discharged to the outside, thereby reducing the cooling rare. 6 can be adjusted, or the pressure in the room can be maintained at a positive pressure from the outside of the room to make it difficult for dust and the like to enter the room from the outside.

上記供給部12および排出部13を部屋9に設ける場合、供給部12は部屋9の下流部に設け、排出部13は部屋9の上流部に設けることが好ましい。このように供給部12および排出部13を部屋9に設けることにより、部屋9の下流部から導入した外気を、フロートガラス1の下流方向に逓減する温度勾配に合わせて温度が低い下流から温度が高い上流に向かって流動させ、この間にフロートガラス1を徐々に冷却した後、部屋9の上流部から外部に排出させることができる。   When the supply unit 12 and the discharge unit 13 are provided in the room 9, the supply unit 12 is preferably provided in the downstream part of the room 9, and the discharge unit 13 is preferably provided in the upstream part of the room 9. By providing the supply unit 12 and the discharge unit 13 in the room 9 as described above, the temperature of the outside air introduced from the downstream part of the room 9 is decreased from the downstream side in accordance with the temperature gradient gradually decreasing in the downstream direction of the float glass 1. The float glass 1 is allowed to flow toward a high upstream, and during this time, the float glass 1 is gradually cooled, and then discharged from the upstream portion of the room 9 to the outside.

上記供給部12および排出部13は、通常部屋9にそれぞれ一つが設けられるが、必要に応じて増設することもできる。部屋9に設ける位置としては、部屋9の天井部で搬送ロール7の上方が好ましい。特に上記供給部12は部屋9の天井部に設け、外気をフロートガラス1の上方から供給することが好ましい。この場合、上記供給部12および排出部13が部屋9の天井部に位置していれば、外気の導入は例えば部屋9の側部から行ってもよく、また部屋9の内部の空気の一部または全部を部屋9の側部から排出してもよい。   The supply unit 12 and the discharge unit 13 are each provided in the normal room 9, but can be added as necessary. The position provided in the room 9 is preferably above the transport roll 7 at the ceiling of the room 9. In particular, the supply unit 12 is preferably provided on the ceiling of the room 9 to supply outside air from above the float glass 1. In this case, if the supply unit 12 and the discharge unit 13 are located on the ceiling of the room 9, the outside air may be introduced from the side of the room 9, for example, or a part of the air inside the room 9 Alternatively, the whole may be discharged from the side of the room 9.

また、上記供給部12および排出部13の形状としては、ダクト状でもよいし、箱状などでもよい。供給部12の開口部(供給口)および排出部13の開口部(排気口)の形状としては、図2に2点鎖線で示すようなスリット状のもの以外に、円形状、矩形状などでもよい。供給部12および排出部13のスリット状の開口部をフロートガラス1の幅方向に平行に設置することにより、外気の部屋9への供給と部屋内の空気の外部への排出をフロートガラス1の幅方向に対し均一に行うことができる。さらに、フロートガラス1を幅方向に均一に冷却するため、スリット状の開口部は上面視にてフロートガラス1の幅方向両端部より例えば50cm程度外側に突出させることが好ましい。   Further, the shape of the supply unit 12 and the discharge unit 13 may be a duct shape or a box shape. The shape of the opening (supply port) of the supply unit 12 and the opening (exhaust port) of the discharge unit 13 may be a circular shape, a rectangular shape, or the like in addition to the slit shape as shown by a two-dot chain line in FIG. Good. By installing slit-like openings of the supply unit 12 and the discharge unit 13 in parallel to the width direction of the float glass 1, supply of the outside air to the room 9 and discharge of the air in the room to the outside are performed on the float glass 1. It can be performed uniformly in the width direction. Furthermore, in order to uniformly cool the float glass 1 in the width direction, it is preferable that the slit-shaped opening portions protrude, for example, about 50 cm outward from both ends in the width direction of the float glass 1 in a top view.

さらに、外気を部屋9に供給するための供給部12の周囲には、図3に示すように部屋内に導入された外気をフロートガラス1の近くまで誘導するためのガイド16が設けられるのが好ましい。このガイド16は耐熱鋼板製の筒状または箱状をなしており、供給部12の周囲から下方に所定の長さ延びている。そして、ガイド16の下流側のガイド板の長さを上流側のガイド板より長く設定し、下流側のガイド板の下端とフロートガラス1との間隔が約1〜100cmになるようにするのが好ましい。供給部12にこのようなガイド16を設けることにより、供給部12から供給された外気をフロートガラス1の近くまで誘導し、ガイド16の下端から部屋9の上流方向に放出したあと、フロートガラス1の板面に沿って流動させることができる。なお、本例のガイド16はフロートガラス1に対する外気の誘導性において優れているが、ガイド16の形状はこれに限定されない。例えば、供給部12の開口部の向きが部屋9の上流方向になるようにガイド16の下端を彎曲させてもよい。   Further, a guide 16 for guiding the outside air introduced into the room to the vicinity of the float glass 1 is provided around the supply unit 12 for supplying the outside air to the room 9 as shown in FIG. preferable. The guide 16 has a cylindrical or box shape made of a heat-resistant steel plate, and extends downward from the periphery of the supply unit 12 by a predetermined length. The length of the guide plate on the downstream side of the guide 16 is set longer than that of the upstream guide plate so that the distance between the lower end of the downstream guide plate and the float glass 1 is about 1 to 100 cm. preferable. By providing such a guide 16 in the supply unit 12, the outside air supplied from the supply unit 12 is guided to the vicinity of the float glass 1, discharged from the lower end of the guide 16 in the upstream direction of the room 9, and then the float glass 1. It can be made to flow along the plate surface. In addition, although the guide 16 of this example is excellent in the inductivity of the external air with respect to the float glass 1, the shape of the guide 16 is not limited to this. For example, the lower end of the guide 16 may be bent so that the direction of the opening of the supply unit 12 is in the upstream direction of the room 9.

以上本発明の好ましい実施形態について説明したが、本発明はこれに限定されないで目的を達成できる範囲において適宜変更できる。例えば、冷却レアの搬送装置を囲む部屋に導入する外気を事前に清浄化処理することによって、冷却レアにおけるフロートガラスの表面に付着する粉塵等をさらに減少できる。   The preferred embodiments of the present invention have been described above. However, the present invention is not limited to these embodiments, and various modifications can be made as long as the object can be achieved. For example, by preliminarily cleaning the outside air introduced into the room surrounding the cooling rare transport device, dust or the like adhering to the surface of the float glass in the cooling rare can be further reduced.

本発明は、フロートガラス製造における冷却レアとして優れており、特に成形温度が高く、高品質が要求されるLCD用ガラス基板をフロート法で製造するのに好適する。   The present invention is excellent as a cooling rare in float glass production, and is particularly suitable for producing a glass substrate for LCD which requires a high molding temperature and high quality by the float process.

1:フロートガラス
2:溶融スズ
3:フロートバス
4:リフトアウト部
5:徐冷炉
6:冷却レア
7:搬送ロール
8:リフトアウトロール
9:部屋
10:囲い構造
11:囲い構造
12:供給部
13:排出部
14:送風装置
15:切断装置
16:ガイド
17:仕切り壁
1: float glass 2: molten tin 3: float bath 4: lift-out part 5: annealing furnace 6: cooling rare 7: transport roll
8: Lift-out roll 9: Room 10: Enclosure structure 11: Enclosure structure 12: Supply unit 13: Discharge unit 14: Blower 15: Cutting device
16: Guide 17: Partition wall

Claims (7)

成形されたフロートガラスを徐冷する徐冷炉の下流側に配置され、該徐冷炉で徐冷された前記フロートガラスを搬送ロールで搬送しながら切断可能な温度まで冷却する冷却レアであって、該冷却レアは前記搬送ロールを囲む部屋を有し、該部屋に外気を供給するための供給部と前記部屋内の空気を外部に排出するための排出部とを設け、前記供給部が前記部屋の下流部に設けられ、前記排出部が前記部屋の上流部に設けられ、前記部屋内の圧力が前記部屋外の圧力に対し正圧に保持されていることを特徴とするフロートガラス製造装置の冷却レア。 A cooling rare which is arranged on the downstream side of a slow cooling furnace for slowly cooling the formed float glass and cools the float glass slowly cooled in the slow cooling furnace to a temperature capable of being cut while being transported by a transport roll, the cooling rare Has a room surrounding the transport roll, and is provided with a supply part for supplying outside air to the room and a discharge part for discharging the air in the room to the outside, and the supply part is a downstream part of the room A cooling rare of a float glass manufacturing apparatus , wherein the discharge part is provided in an upstream part of the room, and the pressure in the room is maintained at a positive pressure with respect to the pressure outside the part. 前記供給部および前記排出部が前記部屋の天井部に設けられる、請求項1に記載のフロートガラス製造装置の冷却レア。The cooling rare of the float glass manufacturing apparatus of Claim 1 with which the said supply part and the said discharge part are provided in the ceiling part of the said room. 成形されたフロートガラスを徐冷する徐冷炉の下流側に配置され、該徐冷炉で徐冷された前記フロートガラスを搬送ロールで搬送しながら切断可能な温度まで冷却する冷却レアであって、該冷却レアは前記搬送ロールを囲む部屋を有し、該部屋に外気を供給するための供給部と前記部屋内の空気を外部に排出するための排出部とを設け、前記供給部および前記排出部が前記部屋の天井部に設けられ、前記部屋内の圧力が前記部屋外の圧力に対し正圧に保持されていることを特徴とするフロートガラス製造装置の冷却レア。 A cooling rare which is arranged on the downstream side of a slow cooling furnace for slowly cooling the formed float glass and cools the float glass slowly cooled in the slow cooling furnace to a temperature capable of being cut while being transported by a transport roll, the cooling rare Has a room surrounding the transport roll, and includes a supply unit for supplying outside air to the room and a discharge unit for discharging the air in the room to the outside, and the supply unit and the discharge unit are A cooling rare of a float glass manufacturing apparatus, which is provided on a ceiling part of a room, and the pressure in the room is maintained at a positive pressure with respect to the pressure outside the part. 前記供給部および前記排出部が、前記フロートガラスの幅方向に平行に開口したスリット状の開口部をそれぞれ有し、前記各開口部が上面視にて前記フロートガラスの幅方向両端部の外側に突出する請求項2または3に記載のフロートガラス製造装置の冷却レア。 The supply unit and the discharge unit each have a slit-shaped opening that is opened in parallel to the width direction of the float glass, and each opening is outside the both ends in the width direction of the float glass in a top view. The cooling rare of the float glass manufacturing apparatus of Claim 2 or 3 which protrudes. 前記供給部に送風装置が設けられている請求項1〜4のいずれかに記載のフロートガラス製造装置の冷却レア。 The cooling rare of the float glass manufacturing apparatus in any one of Claims 1-4 in which the ventilation apparatus is provided in the said supply part. 前記供給部の周囲に、外気を前記フロートガラスに向かって誘導するためのガイドが設けられている請求項1〜のいずれかに記載のフロートガラス製造装置の冷却レア。 The cooling rare of the float glass manufacturing apparatus in any one of Claims 1-5 in which the guide for guide | inducing outside air toward the said float glass is provided around the said supply part. 請求項1〜のいずれかに記載の冷却レアを用いたフロートガラスの冷却方法。 Cooling method of float glass with cooling rare according to any one of claims 1-6.
JP2009295979A 2009-12-25 2009-12-25 Cooling rare of float glass manufacturing equipment Expired - Fee Related JP5434578B2 (en)

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