TWI582051B - A support roll, a forming device having a plate glass for supporting the roll, and a method of forming a plate glass using a support roll - Google Patents
A support roll, a forming device having a plate glass for supporting the roll, and a method of forming a plate glass using a support roll Download PDFInfo
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- TWI582051B TWI582051B TW101140849A TW101140849A TWI582051B TW I582051 B TWI582051 B TW I582051B TW 101140849 A TW101140849 A TW 101140849A TW 101140849 A TW101140849 A TW 101140849A TW I582051 B TWI582051 B TW I582051B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
- C03B18/02—Forming sheets
- C03B18/04—Changing or regulating the dimensions of the molten glass ribbon
- C03B18/06—Changing or regulating the dimensions of the molten glass ribbon using mechanical means, e.g. restrictor bars, edge rollers
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
- C03B18/02—Forming sheets
- C03B18/20—Composition of the atmosphere above the float bath; Treating or purifying the atmosphere above the float bath
- C03B18/22—Controlling or regulating the temperature of the atmosphere above the float tank
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- 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
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Glass Compositions (AREA)
Description
本發明係關於一種支持輥、具有支持輥之板玻璃之成形裝置、及使用支持輥之板玻璃之成形方法。 The present invention relates to a support roll, a forming apparatus for a sheet glass having a support roll, and a forming method of a sheet glass using a support roll.
作為板玻璃之成形方法，廣泛使用有浮式(float)法。浮式法係使導入至收容在浴槽內之熔融金屬(例如，熔融錫)上之熔融玻璃沿特定方向流動而製成帶板狀之熔融玻璃帶之方法。熔融玻璃帶於在沿水平方向流動之過程中冷卻後，藉由提昇輥(Lift-out roll)自熔融金屬中被提起，且於徐冷爐內徐冷，而成為板狀玻璃。板狀玻璃係於自徐冷爐中被搬出之後，藉由切割機切割成特定之尺寸形狀，而成為作為製品之板玻璃。 As a method of forming the sheet glass, a float method is widely used. The floating method is a method in which a molten glass introduced into a molten metal (for example, molten tin) contained in a bath flows in a specific direction to form a strip-shaped molten glass ribbon. The molten glass ribbon is cooled in the process of flowing in the horizontal direction, lifted from the molten metal by a lift-out roll, and rapidly cooled in a cold furnace to form a sheet glass. The sheet glass is cut out into a specific size by a cutter after being carried out from a cold furnace, and becomes a sheet glass as a product.
又，作為另一種成形方法，已知亦有熔合(fusion)法。熔合法係使自引水槽狀構件之左右兩側之上緣溢出之熔融玻璃沿引水槽狀構件之左右兩側面流下，且於左右兩側面相交之下緣匯合，藉此製成帶板狀之熔融玻璃帶之方法。熔融玻璃帶一面向鉛垂方向下方移動一面徐冷，而成為板狀玻璃。板狀玻璃係藉由切割機被切割成特定之尺寸形狀，而成為作為製品之板玻璃。 Further, as another molding method, a fusion method is also known. In the fusion method, the molten glass overflowing from the upper edges of the left and right sides of the water guiding member is flowed down along the left and right sides of the water guiding member, and the lower edges of the left and right sides meet, thereby forming a strip shape. A method of melting a glass ribbon. The molten glass ribbon is moved to the lower side in the vertical direction and is cooled to become a plate glass. The plate glass is cut into a specific size shape by a cutter to become a plate glass as a product.
然而，處在較平衡厚度薄之狀態下之熔融玻璃帶欲沿寬度方向收縮。假如熔融玻璃帶於寬度方向上收縮，則作為製品之板玻璃之厚度會變得較目標之厚度厚。目標之厚度越薄，則該問題越顯著。 However, the molten glass ribbon which is in a state where the balance thickness is thin is intended to shrink in the width direction. If the molten glass ribbon shrinks in the width direction, the thickness of the sheet glass as the product becomes thicker than the target thickness. The thinner the thickness of the target, the more significant the problem.
因此，自先前以來，為了抑制熔融玻璃帶之寬度方向上之收縮，而使用有支持熔融玻璃帶之支持輥(例如，參照專利文獻1)。支持輥係於熔融玻璃帶之寬度方向兩側配置複數對，且沿寬度方向對熔融玻璃帶施加張力。支持輥於前端部具有與熔融玻璃帶之表面接觸之旋轉構件。藉由旋轉構件進行旋轉，而將熔融玻璃帶沿特定方向送出。 Therefore, in order to suppress shrinkage in the width direction of the molten glass ribbon, a support roller that supports the molten glass ribbon has been used (for example, see Patent Document 1). The support roller is provided with a plurality of pairs on both sides in the width direction of the molten glass ribbon, and tension is applied to the molten glass ribbon in the width direction. The support roller has a rotating member that contacts the surface of the molten glass ribbon at the front end portion. The molten glass ribbon is sent in a specific direction by being rotated by the rotating member.
亦存在如下情形：支持輥之旋轉構件係由鋼或耐熱合金等金屬材料呈圓盤狀形成，且對旋轉構件之與熔融玻璃帶接觸之部分實施鍍鉻層等。旋轉構件於與熔融玻璃帶接觸之外周部具有齒輪狀之凹凸，以易於支持熔融玻璃帶。 There is also a case where the rotating member of the supporting roller is formed in a disk shape from a metal material such as steel or a heat resistant alloy, and a chrome plating layer or the like is applied to a portion of the rotating member that is in contact with the molten glass ribbon. The rotating member has gear-like irregularities on the periphery of the molten glass ribbon to easily support the molten glass ribbon.
專利文獻1：日本專利特開2008-239370號公報 Patent Document 1: Japanese Patent Laid-Open Publication No. 2008-239370
然而，由於支持輥之旋轉構件係由金屬材料形成，故而為不使其因與熔融玻璃帶接觸而變得過熱，而於內部具有冷媒流路。由於冷媒流經旋轉構件之內部，故而於旋轉構件之附近，熔融玻璃帶被強力地冷卻。因此，有時熔融玻璃帶之溫度、進而熔融玻璃帶之厚度易變得不穩定，而使作為製品之板玻璃之平坦性受損。 However, since the rotating member of the supporting roller is formed of a metal material, it does not cause overheating due to contact with the molten glass ribbon, and has a refrigerant flow path inside. Since the refrigerant flows through the inside of the rotating member, the molten glass ribbon is strongly cooled in the vicinity of the rotating member. Therefore, the temperature of the molten glass ribbon and the thickness of the molten glass ribbon may be unstable, and the flatness of the sheet glass as a product may be impaired.
又，由於在旋轉構件之附近，熔融玻璃帶被強力地冷卻而變硬，故而有時旋轉構件難以咬入至熔融玻璃帶中，而無法支持(抓持)熔融玻璃帶。尤其是於熔融玻璃帶之移動 方向下游側，因熔融玻璃帶之溫度較低，故而抓持性易成為問題。 Further, since the molten glass ribbon is strongly cooled and hardened in the vicinity of the rotating member, the rotating member is less likely to bite into the molten glass ribbon, and the molten glass ribbon cannot be supported (caught). Especially in the movement of molten glass ribbon On the downstream side of the direction, since the temperature of the molten glass ribbon is low, the gripping property tends to be a problem.
本發明係鑒於上述課題而完成者，其目的在於提供一種能提高作為製品之板玻璃之平坦性、及對熔融玻璃帶之抓持性的支持輥。 The present invention has been made in view of the above problems, and an object thereof is to provide a backup roll which can improve the flatness of a sheet glass as a product and the grip on a molten glass ribbon.
為了解決上述目的，根據本發明之一態樣，提供一種支持輥，其係用於抑制帶板狀之熔融玻璃帶之寬度方向上之收縮者，且於前端部具有與上述熔融玻璃帶接觸之旋轉構件，該旋轉構件於內部不具有冷媒流路，且由陶瓷形成。 In order to solve the above object, according to an aspect of the present invention, a support roller for suppressing shrinkage in a width direction of a strip-shaped molten glass ribbon and having a contact with the molten glass ribbon at a front end portion is provided. A rotating member that does not have a refrigerant flow path inside and is formed of ceramic.
根據本發明，可提供一種能提高作為製品之板玻璃之平坦性、及對熔融玻璃帶之抓持性的支持輥。 According to the present invention, it is possible to provide a backup roll which can improve the flatness of the sheet glass as a product and the grip on the molten glass ribbon.
以下，參照圖式對本發明之一實施形態進行說明。於以下圖式中，對相同或對應之構成標註相同或對應之符號，而省略說明。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding components are denoted by the same or corresponding numerals, and the description is omitted.
圖1係表示本發明之一實施形態之板玻璃之成形裝置之局部剖面圖。圖2係沿圖1之II-II線之剖面圖。 Fig. 1 is a partial cross-sectional view showing a molding apparatus for a sheet glass according to an embodiment of the present invention. Figure 2 is a cross-sectional view taken along line II-II of Figure 1.
板玻璃之成形裝置10具有金屬液槽(float bath)20。金屬液槽20包括：浴槽22，其收容熔融金屬(例如，熔融錫)S；側壁24，其係沿浴槽22之外周上緣而設置；及頂板26，其與側壁24連結，且覆蓋浴槽22之上方；等。於頂板 26上，在形成於浴槽22與頂板26之間之空間28中設置有供給還原性氣體之氣體供給路徑30。又，於氣體供給路徑30中插通有作為加熱源之加熱器32，且加熱器32之發熱部32a配置於浴槽22之上方。 The sheet glass forming apparatus 10 has a float bath 20. The metal liquid tank 20 includes a bath 22 that houses molten metal (for example, molten tin) S, a side wall 24 that is disposed along the outer peripheral edge of the bath 22, and a top plate 26 that is coupled to the side wall 24 and covers the bath 22 Above; etc. Top plate At 26, a gas supply path 30 for supplying a reducing gas is provided in a space 28 formed between the bath 22 and the top plate 26. Further, a heater 32 as a heating source is inserted into the gas supply path 30, and the heat generating portion 32a of the heater 32 is disposed above the bath 22.
使用上述成形裝置10之成形方法係藉由使導入至熔融金屬(例如，熔融錫)S上之熔融玻璃沿特定方向流動而製成帶板狀之熔融玻璃帶G之方法。熔融玻璃帶G於在沿特定方向(圖2中為X方向)流動之過程中冷卻後，藉由提昇輥自熔融錫S中被提起，並於徐冷爐內徐冷，而成為板狀玻璃。板狀玻璃於自徐冷爐中被搬出後，藉由切割機切割成特定之尺寸形狀，而成為作為製品之板玻璃。 The molding method using the above-described molding apparatus 10 is a method of forming a molten glass ribbon G in a plate shape by flowing molten glass introduced into a molten metal (for example, molten tin) S in a specific direction. The molten glass ribbon G is cooled in the process of flowing in a specific direction (X direction in Fig. 2), lifted up from the molten tin S by the lift rolls, and rapidly cooled in the cold furnace to form a sheet glass. After the sheet glass is carried out from the cold furnace, it is cut into a specific size by a cutter to form a sheet glass as a product.
為了防止熔融錫S之氧化，金屬液槽20內之空間28由自氣體供給路徑30供給之還原性氣體充滿。還原性氣體例如含有氫氣1~15體積%、氮氣85~99體積%。為了防止大氣自側壁24之間隙等混入，而將金屬液槽20內之空間28設定為高於大氣壓之氣壓。 In order to prevent oxidation of the molten tin S, the space 28 in the molten metal tank 20 is filled with a reducing gas supplied from the gas supply path 30. The reducing gas contains, for example, 1 to 15% by volume of hydrogen and 85 to 99% by volume of nitrogen. In order to prevent the atmosphere from being mixed in from the gap of the side wall 24, the space 28 in the molten metal tank 20 is set to be higher than the atmospheric pressure.
為了調節金屬液槽20內之溫度分佈，加熱器32例如係於熔融玻璃帶G之流動方向(X方向)及寬度方向(Y方向)上隔開間隔而設置有複數個，且配置成矩陣狀。加熱器32之輸出係以越靠熔融玻璃帶G之流動方向(X方向)上游側則熔融玻璃帶G之溫度越高之方式進行控制。又，加熱器32之輸出係以使熔融玻璃帶G之溫度於寬度方向(Y方向)上變得均勻之方式進行控制。 In order to adjust the temperature distribution in the molten metal tank 20, the heater 32 is provided in a plurality of rows, for example, in a flow direction (X direction) and a width direction (Y direction) of the molten glass ribbon G, and is arranged in a matrix. . The output of the heater 32 is controlled such that the temperature of the molten glass ribbon G is higher as the upstream side of the flow direction (X direction) of the molten glass ribbon G is higher. Moreover, the output of the heater 32 is controlled such that the temperature of the molten glass ribbon G becomes uniform in the width direction (Y direction).
又，板玻璃之成形裝置10為了抑制金屬液槽20內之熔融 玻璃帶G於寬度方向上收縮而具有支持熔融玻璃帶G之支持輥40。如圖2所示，支持輥40於熔融玻璃帶G之寬度方向兩側配置有複數對，且沿寬度方向(圖中為Y方向)對熔融玻璃帶G施加張力。 Further, the plate glass forming apparatus 10 is for suppressing melting in the molten metal tank 20. The glass ribbon G is contracted in the width direction to have a support roller 40 that supports the molten glass ribbon G. As shown in FIG. 2, the support roller 40 has a plurality of pairs disposed on both sides in the width direction of the molten glass ribbon G, and applies tension to the molten glass ribbon G in the width direction (Y direction in the drawing).
支持輥40於前端部具有與熔融玻璃帶G接觸之旋轉構件50。旋轉構件50藉由咬入或接觸於熔融玻璃帶G之上表面，而以不使熔融玻璃帶G於寬度方向上收縮之方式，支持熔融玻璃帶G之寬度方向端部。藉由旋轉構件50進行旋轉，而將熔融玻璃帶G沿特定方向送出。 The support roller 40 has a rotary member 50 that is in contact with the molten glass ribbon G at the front end portion. The rotating member 50 supports the end portion in the width direction of the molten glass ribbon G by biting or contacting the upper surface of the molten glass ribbon G so as not to shrink the molten glass ribbon G in the width direction. The molten glass ribbon G is sent out in a specific direction by the rotation of the rotating member 50.
圖3係表示本發明之一實施形態之支持輥之前視圖。圖4係沿圖3之IV-IV線之局部剖面圖。 Fig. 3 is a front view showing a support roller according to an embodiment of the present invention. Figure 4 is a partial cross-sectional view taken along line IV-IV of Figure 3.
支持輥40主要包括旋轉構件50、可安裝旋轉構件50之安裝構件60、及與安裝構件60一體化之軸構件70。以下，對旋轉構件50、安裝構件60、及軸構件70之構成進行說明，但為了便於說明，而以軸構件70、安裝構件60、旋轉構件50之順序進行說明。 The support roller 40 mainly includes a rotating member 50, a mounting member 60 to which the rotating member 50 can be mounted, and a shaft member 70 integrated with the mounting member 60. Hereinafter, the configuration of the rotating member 50, the mounting member 60, and the shaft member 70 will be described. However, for convenience of explanation, the shaft member 70, the mounting member 60, and the rotating member 50 will be described in order.
軸構件70於內部具有冷媒流路，藉由流經冷媒流路之冷媒而得以冷卻，且可由鋼或耐熱合金等金屬材料形成。亦可於軸構件70之外周捲繞未圖示之隔熱材料等。 The shaft member 70 has a refrigerant flow path therein, is cooled by a refrigerant flowing through the refrigerant flow path, and can be formed of a metal material such as steel or a heat resistant alloy. A heat insulating material or the like (not shown) may be wound around the outer circumference of the shaft member 70.
軸構件70例如為雙層管，包括內管及外管。由內管之內側空間、及形成於內管之外周面與外管之內周面之間之空間構成冷媒流路。 The shaft member 70 is, for example, a double tube including an inner tube and an outer tube. The refrigerant flow path is constituted by the inner space of the inner tube and the space formed between the outer circumferential surface of the inner tube and the inner circumferential surface of the outer tube.
作為冷媒，可使用水等液體、或空氣等氣體。冷媒例如係通過內管之內側空間，而供給至安裝構件60之內側空間，之後通過形成於內管之外周面與外管之內周面之間之空間，而向外部排出。排出至外部之冷媒亦可藉由冷卻器冷卻，而再次回流至內管之內側空間。再者，冷媒之流動方向亦可為反方向。 As the refrigerant, a liquid such as water or a gas such as air can be used. The refrigerant is supplied to the inner space of the mounting member 60, for example, through the inner space of the inner tube, and then discharged to the outside through a space formed between the outer peripheral surface of the inner tube and the inner peripheral surface of the outer tube. The refrigerant discharged to the outside can also be cooled by the cooler and returned to the inner space of the inner tube again. Furthermore, the flow direction of the refrigerant can also be in the opposite direction.
軸構件70係如圖1所示，貫通側壁24，且於金屬液槽20之外部與包括馬達或減速機等之驅動裝置34連接。藉由驅動裝置34作動，而使軸構件70、安裝構件60、及旋轉構件50以軸構件70之中心軸線為中心一體地旋轉。 As shown in FIG. 1, the shaft member 70 penetrates the side wall 24 and is connected to a driving device 34 including a motor or a speed reducer outside the molten metal tank 20. The shaft member 70, the mounting member 60, and the rotating member 50 are integrally rotated about the central axis of the shaft member 70 by the driving device 34 being actuated.
安裝構件60係如圖4所示，與軸構件70一體化，且可於內部具有與軸構件70之冷媒流路連通之未圖示之內側空間。由於冷媒流經內側空間，故而安裝構件60可由鋼或耐熱合金等金屬材料形成。於安裝構件60上，可卸除地安裝有旋轉構件50。 As shown in FIG. 4, the attachment member 60 is integrated with the shaft member 70, and has an inner space (not shown) that communicates with the refrigerant flow path of the shaft member 70. Since the refrigerant flows through the inner space, the mounting member 60 may be formed of a metal material such as steel or a heat resistant alloy. A rotating member 50 is detachably attached to the mounting member 60.
安裝構件60一體地具有：聯軸(shaft)部62，其與軸構件70一體化；環狀之凸緣部63，其自聯軸部62之前端部向聯軸部62之徑向外方突出；及桿部64，其自聯軸部62之前端部與聯軸部62同軸地延伸。 The mounting member 60 integrally includes a shaft portion 62 that is integrated with the shaft member 70 and an annular flange portion 63 that is radially outward from the front end portion of the coupling shaft portion 62 toward the coupling portion 62. And a rod portion 64 that extends coaxially from the front end portion of the coupling portion 62 and the coupling portion 62.
聯軸部62與軸構件70對接，例如藉由焊接而一體化。可於聯軸部62中設置與軸構件70之冷媒流路連通之未圖示之冷媒流路。 The coupling portion 62 is butted against the shaft member 70, for example, by welding. A refrigerant flow path (not shown) that communicates with the refrigerant flow path of the shaft member 70 may be provided in the coupling portion 62.
凸緣部63自聯軸部62之前端部(與軸構件70相反之側之 端部)向聯軸部62之徑向外方突出。可於凸緣部63中設置與軸構件70之冷媒流路連通之未圖示之冷媒流路。 The flange portion 63 is from the front end portion of the coupling portion 62 (the side opposite to the shaft member 70) The end portion protrudes radially outward of the coupling portion 62. A refrigerant flow path (not shown) that communicates with the refrigerant flow path of the shaft member 70 may be provided in the flange portion 63.
桿部64自聯軸部62之前端部與聯軸部62同軸地延伸。可於桿部64中設置與軸構件70之冷媒流路連通之未圖示之冷媒流路。如圖4所示，桿部64貫通旋轉構件50，且於前端部具有公螺紋部。藉由螺固於公螺紋部上之螺帽41、及凸緣部63，而限制旋轉構件50於軸向上之移動。藉由將螺帽41自公螺紋部卸除，而可將旋轉構件50卸除。 The rod portion 64 extends coaxially from the front end portion of the coupling portion 62 and the coupling portion 62. A refrigerant flow path (not shown) that communicates with the refrigerant flow path of the shaft member 70 may be provided in the rod portion 64. As shown in FIG. 4, the rod portion 64 passes through the rotating member 50 and has a male screw portion at the front end portion. The nut 41 is screwed to the male screw portion and the flange portion 63 to restrict the movement of the rotary member 50 in the axial direction. The rotating member 50 can be removed by removing the nut 41 from the male screw portion.
又，安裝構件60具有軸部67、68，該軸部67、68係固定於凸緣部63之前端側之面上，且與桿部64之中心軸線平行。藉由軸部67、68及桿部64而使安裝構件60與旋轉構件50可一體地旋轉。 Further, the attachment member 60 has shaft portions 67 and 68 which are fixed to the front end side of the flange portion 63 and which are parallel to the central axis of the rod portion 64. The mounting member 60 and the rotating member 50 are integrally rotatable by the shaft portions 67, 68 and the rod portion 64.
軸部67、68係如圖4所示，分別貫通旋轉構件50，且於前端部具有公螺紋部。藉由螺固於公螺紋部上之螺帽42、43、及凸緣部63，而限制旋轉構件50於軸向上之移動。藉由將螺帽42、43自公螺紋部卸除，而可將旋轉構件50卸除。 As shown in FIG. 4, the shaft portions 67 and 68 respectively pass through the rotating member 50 and have a male screw portion at the front end portion. The rotation of the rotating member 50 in the axial direction is restricted by the nuts 42 and 43 screwed to the male thread portion and the flange portion 63. The rotating member 50 can be removed by removing the nuts 42 and 43 from the male screw portion.
旋轉構件50為圓盤狀，且旋轉構件50之中心軸線及軸構件70之中心軸線位於同一直線上。旋轉構件50以外周部51與熔融玻璃帶G之表面(於本實施形態中為上表面)接觸。藉由旋轉構件50進行旋轉，而將熔融玻璃帶G沿特定方向送出。 The rotating member 50 has a disk shape, and the central axis of the rotating member 50 and the central axis of the shaft member 70 are on the same straight line. The outer peripheral portion 51 of the rotating member 50 is in contact with the surface (upper surface in the present embodiment) of the molten glass ribbon G. The molten glass ribbon G is sent out in a specific direction by the rotation of the rotating member 50.
例如，如圖3所示，旋轉構件50於外周部51具有齒輪狀 之凹凸52。藉由凹凸52，而使旋轉構件50變得易於咬入至熔融玻璃帶G中。凹凸52之凸部52a並無特別限定，例如，如圖3所示，可形成為前端尖細狀(例如，四角錐狀)。齒輪狀之凹凸52係如圖4所示，於旋轉構件50之外周部51形成有一行，但亦可形成有複數行。 For example, as shown in FIG. 3, the rotating member 50 has a gear shape at the outer peripheral portion 51. The bump 52. By the unevenness 52, the rotating member 50 becomes easy to bite into the molten glass ribbon G. The convex portion 52a of the unevenness 52 is not particularly limited, and for example, as shown in FIG. 3, the tip end may be formed in a tapered shape (for example, a quadrangular pyramid shape). As shown in FIG. 4, the gear-like irregularities 52 are formed in one row on the outer peripheral portion 51 of the rotary member 50, but a plurality of rows may be formed.
旋轉構件50於內部不具有冷媒流路，且由陶瓷形成。陶瓷與先前之鋼或耐熱合金等金屬相比高溫強度較高，故而無需先前所必需之冷媒流路。由此，由於冷媒不流經旋轉構件50之內部，故而於旋轉構件50之附近，熔融玻璃帶G難以被強力地冷卻。其結果，熔融玻璃帶G之溫度、進而熔融玻璃帶G之厚度穩定化，因此作為製品之板玻璃之平坦性提高。又，由於在旋轉構件50之附近，熔融玻璃帶G難以被強力地冷卻，從而難以變硬，故而旋轉構件50易於咬入至熔融玻璃帶G中，從而旋轉構件50對熔融玻璃帶G之抓持性提高。該效果於熔融玻璃帶G之溫度降低之流動方向下游側較顯著。 The rotating member 50 does not have a refrigerant flow path inside and is formed of ceramic. Ceramics have higher high-temperature strength than metals such as steel or heat-resistant alloys, so there is no need for a previously required refrigerant flow path. Thereby, since the refrigerant does not flow through the inside of the rotating member 50, the molten glass ribbon G is hardly cooled strongly in the vicinity of the rotating member 50. As a result, the temperature of the molten glass ribbon G and the thickness of the molten glass ribbon G are stabilized, so that the flatness of the sheet glass as a product is improved. Further, since the molten glass ribbon G is hardly cooled in the vicinity of the rotating member 50, it is difficult to be hardened, so that the rotating member 50 is easily bitten into the molten glass ribbon G, so that the rotating member 50 catches the molten glass ribbon G. Increased holdings. This effect is remarkable on the downstream side in the flow direction in which the temperature of the molten glass ribbon G is lowered.
作為陶瓷，並無特別限定，例如，可使用碳化矽(SiC)質陶瓷、氮化矽(Si3N4)質陶瓷等。碳化矽或氮化矽對於熔融錫S之飛沫或熔融錫S之蒸氣之耐性較高，又，高溫強度或潛變(creep)特性優異。 The ceramic is not particularly limited, and for example, tantalum carbide (SiC) ceramics, tantalum nitride (Si 3 N 4 ) ceramics, or the like can be used. Tantalum carbide or tantalum nitride is highly resistant to the spray of molten tin S or the vapor of molten tin S, and is excellent in high temperature strength or creep characteristics.
陶瓷之種類係根據作為製品之板玻璃(即，熔融玻璃帶G)之種類等而選定。例如，於板玻璃為無鹼玻璃之情形時，較佳為耐熱衝擊性優異之氮化矽質陶瓷。其原因在於，於無鹼玻璃之情形時，存在金屬液槽20內之溫度較高 之傾向，故而耐熱衝擊性較高者之作業操作之自由度變高。進而，其原因在於，越高溫，則與熔融玻璃帶G或熔融錫S之反應性越容易成為問題，但氮化矽質陶瓷對於反應性亦存在較低之傾向。又，於板玻璃之種類為鈉鈣玻璃之情形時，除氮化矽質陶瓷以外，亦可使用碳化矽質陶瓷或氧化鋁系陶瓷。 The type of the ceramic is selected depending on the type of the sheet glass (i.e., the molten glass ribbon G) as the product. For example, when the plate glass is an alkali-free glass, a tantalum nitride ceramic excellent in thermal shock resistance is preferable. The reason is that in the case of alkali-free glass, there is a higher temperature in the molten metal tank 20. Therefore, the degree of freedom in the operation of the person having higher thermal shock resistance becomes higher. Further, the reason is that the higher the temperature, the more likely the reactivity with the molten glass ribbon G or the molten tin S is, but the nitrided ceramic tends to have a lower reactivity. Further, in the case where the type of the plate glass is soda lime glass, in addition to the tantalum nitride ceramic, a tantalum ceramic or an alumina ceramic may be used.
無鹼玻璃係實質上不含鹼金屬氧化物(Na2O、K2O、Li2O)之玻璃。無鹼玻璃中之鹼金屬氧化物之含量之合量(Na2O+K2O+Li2O)可為例如0.1%以下。 The alkali-free glass is a glass which does not substantially contain an alkali metal oxide (Na 2 O, K 2 O, Li 2 O). The combined amount of the alkali metal oxide in the alkali-free glass (Na 2 O+K 2 O+Li 2 O) may be, for example, 0.1% or less.
例如，以氧化物基準之質量百分率表示，無鹼玻璃含有SiO2：50~70%、較佳為50~66%，Al2O3：10.5~24%，B2O3：0~12%，MgO：0~10%、較佳為0~8%，CaO：0~14.5%，SrO：0~24%，BaO：0~13.5%，ZrO2：0~5%，且含有MgO+CaO+SrO+BaO：8~29.5%、較佳為9~29.5%。 For example, based on the mass percentage of the oxide standard, the alkali-free glass contains SiO 2 : 50 to 70%, preferably 50 to 66%, Al 2 O 3 : 10.5 to 24%, and B 2 O 3 : 0 to 12%. , MgO: 0~10%, preferably 0~8%, CaO: 0~14.5%, SrO: 0~24%, BaO: 0~13.5%, ZrO 2 : 0~5%, and contains MgO+CaO +SrO+BaO: 8 to 29.5%, preferably 9 to 29.5%.
無鹼玻璃於考慮高應變點及熔解性之情形時，以氧化物基準之質量百分率表示，較佳為含有SiO2：58~66%、Al2O3：15~22%、B2O3：5~12%、MgO：0~8%、CaO：0~9%、SrO：3~12.5%、BaO：0~2%，且含有MgO+CaO+SrO+BaO：9~18%。 In the case of considering high strain point and meltability, the alkali-free glass is expressed by the mass percentage of the oxide standard, preferably containing SiO 2 : 58 to 66%, Al 2 O 3 : 15 to 22%, and B 2 O 3 . : 5~12%, MgO: 0~8%, CaO: 0~9%, SrO: 3~12.5%, BaO: 0~2%, and contains MgO+CaO+SrO+BaO: 9~18%.
無鹼玻璃於考慮高應變點之情形時，以氧化物基準之質量百分率表示，較佳為含有SiO2：54~73%、Al2O3：10.5~22.5%、B2O3：0~5.5%、MgO：0~10%、CaO：0~9%、SrO：0~16%、BaO：0~2.5%、及MgO+CaO+SrO+BaO：8~26%。 When the alkali-free glass is considered to have a high strain point, it is represented by mass percentage of the oxide standard, and preferably contains SiO 2 : 54 to 73%, Al 2 O 3 : 10.5 to 22.5%, and B 2 O 3 : 0~ 5.5%, MgO: 0~10%, CaO: 0~9%, SrO: 0~16%, BaO: 0~2.5%, and MgO+CaO+SrO+BaO: 8~26%.
於板玻璃之種類為無鹼玻璃之情形時，既可旋轉構件50中之至少與熔融玻璃帶G接觸之部分為氮化矽質陶瓷，亦可旋轉構件50之整體不為氮化矽質陶瓷。例如，亦可於包含金屬、碳或其他陶瓷之基材上，藉由成膜、接合或嵌合等形成有氮化矽質陶瓷層。如此，亦可針對旋轉構件50之每個部位，使用不同種類之陶瓷。再者，於本實施形態中，旋轉構件50之整體係由氮化矽質陶瓷形成。 When the type of the plate glass is an alkali-free glass, at least the portion of the rotatable member 50 that is in contact with the molten glass ribbon G is a tantalum nitride ceramic, or the entire rotating member 50 is not a tantalum ceramic. . For example, a tantalum nitride ceramic layer may be formed on a substrate including metal, carbon or other ceramic by film formation, bonding, or fitting. As such, different types of ceramics can be used for each portion of the rotating member 50. Further, in the present embodiment, the entire rotating member 50 is formed of a tantalum nitride ceramic.
氮化矽質陶瓷可為將由包含氮化矽之粉末、與燒結助劑之粉末之混合粉末所製作之成形體燒結而成之燒結體。作為燒結方法，有常壓燒結法、加壓燒結法(包括熱壓燒結、氣壓燒結)等。作為燒結助劑，例如，可使用選自氧化鋁(Al2O3)、氧化鎂(MgO)、氧化鈦(TiO2)、氧化鋯(ZrO2)、及氧化釔(Y2O3)中之至少1種。 The tantalum nitride ceramic may be a sintered body obtained by sintering a molded body obtained by mixing a powder containing tantalum nitride and a powder of a sintering aid. Examples of the sintering method include a normal pressure sintering method, a pressure sintering method (including hot press sintering, and air pressure sintering). As the sintering aid, for example, alumina (Al 2 O 3 ), magnesium oxide (MgO), titanium oxide (TiO 2 ), zirconia (Z r O 2 ), and yttrium oxide (Y 2 O 3 ) can be used. At least one of them.
氮化矽質陶瓷較佳為，鋁(Al)之含量為0.1質量%以下，較佳為未達1質量%，鎂(Mg)之含量為0.7質量%以下，較佳為未達0.7質量%，鈦(Ti)之含量為0.9質量%以下，較佳為未達0.9質量%。若Al含量、Mg含量、及Ti含量為上述範圍，則難以與熔融玻璃帶G反應，又，熔融玻璃帶G難以附著，故而可獲得良好之耐久性。再者，Al含量、Mg含量、及Ti含量亦可分別為0質量%。 The tantalum nitride ceramic preferably has a content of aluminum (Al) of 0.1% by mass or less, preferably less than 1% by mass, and a content of magnesium (Mg) of 0.7% by mass or less, preferably less than 0.7% by mass. The content of titanium (Ti) is 0.9% by mass or less, preferably less than 0.9% by mass. When the Al content, the Mg content, and the Ti content are in the above range, it is difficult to react with the molten glass ribbon G, and the molten glass ribbon G is hard to adhere, so that good durability can be obtained. Further, the Al content, the Mg content, and the Ti content may each be 0% by mass.
氮化矽質陶瓷較佳為，鋯(Zr)之含量為3.5質量%以下，較佳為未達3.5質量%，釔(Y)之含量為0.5質量%以上，較佳為超過0.5質量%，且10質量%以下，較佳為未達10質量%。Zr或Y與Al或Mg、Ti相比，為難以與熔融玻璃帶G相 互擴散之成分，故而能夠以上述範圍含有。藉由以上述範圍含有Zr或Y，而可促進氮化矽粉末之燒結。再者，Zr為任意成分，且Zr含量亦可為0質量%。 The tantalum nitride ceramic preferably has a zirconium (Zr) content of 3.5% by mass or less, preferably less than 3.5% by mass, and a cerium (Y) content of 0.5% by mass or more, preferably more than 0.5% by mass. It is 10% by mass or less, preferably less than 10% by mass. Compared with Al or Mg and Ti, Zr or Y is difficult to phase with molten glass ribbon G. The components of the interdiffusion can be contained in the above range. Sintering of the tantalum nitride powder can be promoted by containing Zr or Y in the above range. Further, Zr is an optional component, and the Zr content may be 0% by mass.
再者，本實施形態之氮化矽質陶瓷雖作為藉由常壓燒結法或加壓燒結法而獲得之燒結體，但亦可為藉由反應燒結法而獲得之燒結體。反應燒結法係於氮氣環境中對由金屬矽(Si)之粉末所成形之成形體進行加熱之方法。反應燒結法不使用燒結助劑，故而可獲得高純度之燒結體，從而可提高燒結體相對於熔融玻璃帶G之耐久性。 In addition, the tantalum nitride ceramic of the present embodiment is a sintered body obtained by a normal pressure sintering method or a pressure sintering method, but may be a sintered body obtained by a reaction sintering method. The reaction sintering method is a method of heating a molded body formed of a powder of metal cerium (Si) in a nitrogen atmosphere. Since the reaction sintering method does not use a sintering aid, a sintered body of high purity can be obtained, and the durability of the sintered body with respect to the molten glass ribbon G can be improved.
於旋轉構件50之中心貫通形成有圓孔。於圓孔中，插通桿部64。圓孔之內徑大於桿部64之外徑。 A circular hole is formed through the center of the rotating member 50. In the round hole, the rod portion 64 is inserted. The inner diameter of the circular hole is larger than the outer diameter of the rod portion 64.
又，於旋轉構件50中貫通形成有插通孔。於插通孔中，插通軸部67、68。各插通孔之內徑大於相對應之軸部67、68之外徑。 Further, an insertion hole is formed through the rotating member 50. The shaft portions 67, 68 are inserted into the insertion holes. The inner diameter of each insertion hole is larger than the outer diameter of the corresponding shaft portions 67, 68.
圖5係表示旋轉構件之變形例(1)之前視圖。圖6(a)~(c)係沿圖5之VI-VI線之剖面圖之例。 Fig. 5 is a front view showing a modification (1) of the rotating member. 6(a) to (c) are examples of sectional views taken along line VI-VI of Fig. 5.
例如，如圖6(a)所示，圖5所示之旋轉構件50A之外周面56A係遍及全周，而剖面形狀為向徑向外方凸起之彎曲狀。旋轉構件50A之外周面56A係軸向中央部較軸向兩端部更向徑向外方突出。旋轉構件50A於外周面56A不具有齒輪狀之凹凸。即便無齒輪狀之凹凸，旋轉構件50A亦可咬入至熔融玻璃帶G中。其原因在於，由於冷媒並未流經旋轉構件50A之內部，故而於旋轉構件50A之附近，熔融玻璃帶G不會被強力地冷卻，而難以變硬。 For example, as shown in Fig. 6(a), the outer peripheral surface 56A of the rotating member 50A shown in Fig. 5 is spread over the entire circumference, and the cross-sectional shape is curved outward in the radial direction. The outer peripheral surface 56A of the rotating member 50A protrudes outward in the radial direction from the axial end portions in the axial center portion. The rotating member 50A does not have gear-like irregularities on the outer peripheral surface 56A. The rotating member 50A can bite into the molten glass ribbon G even without the gear-like irregularities. This is because the refrigerant does not flow through the inside of the rotating member 50A, so that the molten glass ribbon G is not strongly cooled in the vicinity of the rotating member 50A, and is hard to be hardened.
例如，如圖6(b)所示，若考慮與熔融玻璃帶G之抓持力，則上述凸起之彎曲狀之曲率半徑Ra較佳為R1 mm~R100 mm，更佳為R3 mm~R50 mm，進而較佳為R5 mm~R30 mm，尤佳為R10 mm~R20 mm。又，於上述凸起之彎曲狀中，例如，如圖6(c)所示，上述軸向中央部之曲率半徑Rb與上述軸向兩端部之曲率半徑Rc亦可為複合R。此時，曲率半徑Rb、Rc均較佳為R1 mm~R100 mm，更佳為R3 mm~R50 mm，進而較佳為R5 mm~R30 mm，尤佳為R10 mm~R20 mm。又，於上述凸起之彎曲狀中，亦可於局部具有平坦部，但不具有平坦部者與熔融玻璃帶G之抓持力穩定，故而較佳。 For example, as shown in FIG. 6(b), in consideration of the gripping force with the molten glass ribbon G, the curvature radius Ra of the curved shape of the projection is preferably R1 mm to R100 mm, more preferably R3 mm to R50. Mm, and further preferably R5 mm to R30 mm, particularly preferably R10 mm to R20 mm. Further, in the curved shape of the projection, for example, as shown in FIG. 6(c), the curvature radius Rb of the axial center portion and the curvature radius Rc of the axial end portions may be a composite R. At this time, the curvature radii Rb and Rc are preferably R1 mm to R100 mm, more preferably R3 mm to R50 mm, further preferably R5 mm to R30 mm, and particularly preferably R10 mm to R20 mm. Further, in the curved shape of the projections, a flat portion may be partially provided, but the gripping force of the molten glass ribbon G is not stabilized, and therefore, it is preferable.
又，若考慮與熔融玻璃帶G之抓持力，則圖6(b)所示之上述凸起之彎曲狀處之旋轉構件50A之半徑方向之寬度d較佳為0.5 mm以上，更佳為1 mm以上，進而較佳為2 mm以上。同樣地，上述凸起之彎曲狀處之旋轉構件50A之半徑方向之寬度d較佳為5 mm以下，更佳為4 mm以下。 Further, in consideration of the gripping force with the molten glass ribbon G, the width d of the rotating member 50A in the curved portion of the convex portion shown in Fig. 6(b) in the radial direction is preferably 0.5 mm or more, more preferably 1 mm or more, and more preferably 2 mm or more. Similarly, the width d of the rotating member 50A in the curved portion of the convex portion is preferably 5 mm or less, more preferably 4 mm or less.
又，就圖6(b)所示之旋轉構件50A之半徑r而言，若考慮安裝構件60與熔融玻璃帶G之接觸防止或軸構件70之水平性，則較佳為100 mm以上，更佳為150 mm以上，進而較佳為180 mm以上，若考慮旋轉構件50A與熔融玻璃帶G之位置調整或旋轉構件50A之旋轉速度之微調整，則較佳為350 mm以下，更佳為300 mm以下，進而較佳為270 mm以下。 Further, in consideration of the radius r of the rotating member 50A shown in Fig. 6(b), considering the contact prevention between the mounting member 60 and the molten glass ribbon G or the horizontalness of the shaft member 70, it is preferably 100 mm or more. It is preferably 150 mm or more, and more preferably 180 mm or more. When the positional adjustment of the rotating member 50A and the molten glass ribbon G or the fine adjustment of the rotational speed of the rotating member 50A is considered, it is preferably 350 mm or less, more preferably 300 or less. It is not more than mm, and further preferably 270 mm or less.
又，就旋轉構件50A之厚度w而言，若考慮與熔融玻璃 帶G之抓持力，則較佳為5 mm以上，更佳為10 mm以上，進而較佳為15 mm以上，若考慮提高熔融玻璃帶G之平坦性或防止無需之抓持寬度之擴大，則較佳為60 mm以下，更佳為40 mm以下，進而較佳為35 mm以下。 Further, in terms of the thickness w of the rotating member 50A, consideration is given to the molten glass. The gripping force with G is preferably 5 mm or more, more preferably 10 mm or more, and further preferably 15 mm or more. If the flatness of the molten glass ribbon G is increased or the unnecessary grip width is prevented from being increased, It is preferably 60 mm or less, more preferably 40 mm or less, and still more preferably 35 mm or less.
如此，旋轉構件50A之外周面56A係如圖6(a)~(c)所示，遍及全周，剖面形狀為向徑向外方凸起之彎曲狀，且無齒輪狀之凹凸，故而難以破損，從而可降低成形或加工成本。又，於如圖6(a)~(c)之構造之情形時，可使熔融玻璃帶G穩定地成形為板狀玻璃，故而較佳。 As described above, the outer peripheral surface 56A of the rotating member 50A is curved over the entire circumference as shown in FIGS. 6( a ) to 6 ( c ), and has a cross-sectional shape that is convex outward in the radial direction, and has no gear-like irregularities, and thus is difficult. Damaged, thereby reducing the cost of forming or processing. Further, in the case of the structure shown in Figs. 6(a) to 6(c), the molten glass ribbon G can be stably formed into a sheet glass, which is preferable.
圖7~圖10係表示旋轉構件之變形例(2)~(5)之前視圖。於變形例(2)~(5)中，為了緩和旋轉構件50B~50E中之溫度斜率等所引起之應力，而在旋轉構件50B~50E中形成有缺口57B、或貫通孔58C、58D、59E。迄今為止之金屬製之旋轉構件係如上所述般於內部具有冷卻流路，因此難以設置上述缺口或貫通孔。本發明之旋轉構件無需冷卻，而無需設置冷卻流路。進而，可容易且任意地設置上述缺口或貫通孔。若於旋轉構件中設置有上述缺口或貫通孔，則可緩和旋轉構件之上述應力，進而亦可緩和旋轉構件之製作時之殘留應力，從而可防止旋轉構件之變形或破損，故而較佳。 7 to 10 are front views showing modifications (2) to (5) of the rotating member. In the modifications (2) to (5), in order to alleviate the stress caused by the temperature gradient or the like in the rotating members 50B to 50E, the notch 57B or the through holes 58C, 58D, 59E are formed in the rotating members 50B to 50E. . Since the metal rotating member has a cooling flow path inside as described above, it is difficult to provide the above-mentioned notch or through hole. The rotating member of the present invention does not require cooling, and it is not necessary to provide a cooling flow path. Further, the above-mentioned notch or through hole can be easily and arbitrarily provided. When the notch or the through hole is provided in the rotating member, the stress of the rotating member can be alleviated, and the residual stress during the production of the rotating member can be alleviated, and deformation or breakage of the rotating member can be prevented, which is preferable.
於圖7所示之旋轉構件50B中，除形成有供桿部64(參照圖4)插通之圓孔53B、及供軸部67、68(參照圖4)插通之插通孔54B、55B以外，亦沿圓孔53B之內周隔開間隔而形成有複數個圓弧狀之缺口57B。 The rotary member 50B shown in FIG. 7 is provided with a circular hole 53B through which the rod portion 64 (see FIG. 4) is inserted, and an insertion hole 54B through which the shaft portions 67 and 68 (see FIG. 4) are inserted, In addition to 55B, a plurality of arc-shaped notches 57B are formed at intervals along the inner circumference of the circular hole 53B.
於圖8所示之旋轉構件50C中，除形成有供桿部64(參照圖4)插通之圓孔53C、及供軸部67、68(參照圖4)插通之插通孔54C、55C以外，亦呈放射狀形成有複數個於徑向上較長之貫通孔58C。 The rotary member 50C shown in FIG. 8 is provided with a circular hole 53C through which the rod portion 64 (see FIG. 4) is inserted, and an insertion hole 54C through which the shaft portions 67 and 68 (see FIG. 4) are inserted, In addition to the 55C, a plurality of through holes 58C which are long in the radial direction are also formed radially.
於圖9所示之旋轉構件50D中，除形成有供桿部64(參照圖4)插通之圓孔53D、及供軸部67、68(參照圖4)插通之插通孔54D、55D以外，亦形成有複數個於圓周方向上較長之圓弧狀之貫通孔58D。 The rotary member 50D shown in FIG. 9 is provided with a circular hole 53D through which the rod portion 64 (see FIG. 4) is inserted, and an insertion hole 54D through which the shaft portions 67 and 68 (see FIG. 4) are inserted, In addition to the 55D, a plurality of through holes 58D having an arc shape that is long in the circumferential direction are formed.
於圖10所示之旋轉構件50E中，除形成有供桿部64(參照圖4)插通之圓孔53E、及供軸部67、68(參照圖4)插通之插通孔54E、55E以外，亦形成有複數個圓形之貫通孔59E。 In the rotating member 50E shown in FIG. 10, a circular hole 53E through which the rod portion 64 (see FIG. 4) is inserted, and an insertion hole 54E through which the shaft portions 67 and 68 (see FIG. 4) are inserted are formed. In addition to the 55E, a plurality of circular through holes 59E are formed.
缺口57B、貫通孔58C、58D、59E之尺寸形狀、配置位置係例如藉由有限要素法等應力解析而求出。 The size and arrangement position of the notch 57B and the through holes 58C, 58D, and 59E are obtained by, for example, stress analysis such as the finite element method.
以上，對本發明之一實施形態及其變形例進行了說明，但本發明並不限制於上述實施形態及其變形例。只要不脫離本發明之範圍，則可對上述實施形態及其變形例添加各種變形及置換。 Although an embodiment of the present invention and its modifications have been described above, the present invention is not limited to the above embodiment and its modifications. Various modifications and substitutions may be added to the above-described embodiments and their modifications without departing from the scope of the invention.
例如，本實施形態之支持輥40亦可僅於金屬液槽20內之一部分區域內使用，例如亦可作為下游側之支持輥而使用。其原因在於，在下游側，因溫度較低且熔融玻璃帶較硬，故而抓持性易成為問題。 For example, the support roller 40 of the present embodiment may be used only in a part of the molten metal tank 20, and may be used, for example, as a support roller on the downstream side. The reason for this is that on the downstream side, since the temperature is low and the molten glass ribbon is hard, the gripping property tends to be a problem.
若考慮熔融玻璃帶G之成形性，則本發明之支持輥40較佳為於熔融玻璃帶G之黏度為103~1013[dPa．s]之區域內使 用。即，於上述無鹼玻璃之情形時，較佳為於熔融玻璃帶G之溫度為800~1400℃之區域內使用。先前於熔融玻璃帶G之黏度為106.5~1013[dPa．s]之區域1內、即於上述無鹼玻璃之情形時於熔融玻璃帶G之溫度為800~1000℃之區域1內，難以穩定地抓持，但本發明之支持輥40即便於上述區域1內亦可實現穩定之抓持，故而更佳為至少於上述區域1內使用。 The support roller 40 of the present invention preferably has a viscosity of 10 3 to 10 13 [dPa. Used within the area of s]. That is, in the case of the above alkali-free glass, it is preferably used in a region where the temperature of the molten glass ribbon G is 800 to 1400 °C. The viscosity of the previous molten glass ribbon G was 10 6.5 ~ 10 13 [dPa. In the region 1 of s], that is, in the case of the above alkali-free glass, it is difficult to stably hold in the region 1 in which the temperature of the molten glass ribbon G is 800 to 1000 ° C, but the support roller 40 of the present invention is even in the above region. A stable grip can also be achieved in 1 and it is more preferable to use it at least in the above region 1.
又，本實施形態之支持輥40係以浮式法使用，但亦可以其他成形方法使用，例如亦可以熔合法使用。 Further, although the support roller 40 of the present embodiment is used in a floating method, it may be used in another molding method, and may be used, for example, in a fusion method.
於熔合法之情形時，支持輥為圓柱狀或圓筒狀，且以自表面側及背面側夾持熔融玻璃帶之方式以2個為1組而使用，包含2個支持輥之支持輥群係於熔融玻璃帶之寬度方向兩側配置複數對。 In the case of the fusion process, the support roller is in the shape of a cylinder or a cylinder, and is used in two groups of the molten glass ribbon from the front side and the back side, and the support roller group including the two support rollers is used. A plurality of pairs are disposed on both sides in the width direction of the molten glass ribbon.
又，於熔合法之情形時，板玻璃之成形裝置具有連續地供給熔融玻璃之引水槽狀構件。自引水槽狀構件之左右兩側之上緣溢出之熔融玻璃沿引水槽狀構件之左右兩側面流下，並於左右兩側面相交之下緣合流，而一體化，藉此成為熔融玻璃帶。熔融玻璃帶係藉由複數對支持輥群，一面沿寬度方向對其施加張力而抑制寬度方向上之收縮，一面將其向下方送出。 Further, in the case of the fusion method, the plate glass forming apparatus has a water guiding member which continuously supplies the molten glass. The molten glass overflowing from the upper edges of the left and right sides of the water guiding member flows down along the left and right sides of the water guiding member, and merges at the lower edges of the left and right sides to be integrated, thereby forming a molten glass ribbon. The molten glass ribbon is fed downward by applying tension to the support roller group in the width direction and suppressing shrinkage in the width direction.
以下，藉由實施例等對本發明具體地進行說明，但本發明並非由該等例子所限定。 Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited by the examples.
於例1~例4中，對燒結體相對於熔融玻璃之潤濕性與燒 結體中所含有之雜質之關係進行調查。 In Examples 1 to 4, the wettability and burning of the sintered body with respect to the molten glass The relationship between the impurities contained in the knot was investigated.
評價用之試片及試板係對每例均不同之氮化矽(Si3N4)質陶瓷之燒結體進行加工而製作。 The test piece and the test piece for evaluation were produced by processing a sintered body of tantalum nitride (Si 3 N 4 ) ceramics each having a different degree.
燒結體中之雜質之含量係利用輝光放電質譜分析法(Glow Discharge Mass Spectrometry)對自燒結體中呈角狀切下之試片進行分析而測定。作為測定對象之雜質係作為燒結助劑而含有者，為鋁(Al)、鎂(Mg)、鈦(Ti)，鋯(Zr)、釔(Y)。 The content of the impurities in the sintered body was measured by Glow Discharge Mass Spectrometry to analyze the test piece cut from the sintered body in an angular shape. The impurities to be measured are contained as a sintering aid, and are aluminum (Al), magnesium (Mg), titanium (Ti), zirconium (Zr), or yttrium (Y).
燒結體相對於熔融玻璃之潤濕性係藉由高溫潤濕性試驗機(ULVAC理工公司製造，WET1200)而測定。具體而言，將無鹼玻璃(旭硝子公司製造，AN100)之角狀玻璃片載置於加工成1 mm厚度之試板上，且於氮氣環境中，以10分鐘升溫至1150℃，於1150℃下保持10分鐘而生成熔融玻璃，其後以90秒使溫度自1150℃下降至1050℃，並維持在1050℃，而測定液滴之接觸角。測定係於下降至1050℃之時間點時、及自該時間點起經過2小時後、4小時後、6小時後、8小時後進行。接觸角越大，則意味著熔融玻璃越難以被燒結體潤濕，故而表示熔融玻璃與燒結體之反應性較低。又，接觸角之時間變化越少，則意味著潤濕難易度越易於持續。 The wettability of the sintered body with respect to the molten glass was measured by a high-temperature wettability tester (manufactured by ULVAC Corporation, WET1200). Specifically, the horn glass piece of the alkali-free glass (manufactured by Asahi Glass Co., Ltd., AN100) was placed on a test plate processed to a thickness of 1 mm, and heated to 1150 ° C for 10 minutes in a nitrogen atmosphere at 1150 ° C. The molten glass was formed by holding for 10 minutes, and then the temperature was lowered from 1,150 ° C to 1,050 ° C for 90 seconds, and maintained at 1,050 ° C, and the contact angle of the liquid droplets was measured. The measurement was carried out at a time point of dropping to 1050 ° C and after 2 hours, 4 hours, 6 hours, and 8 hours from the time point. The larger the contact angle, the more difficult it is for the molten glass to be wetted by the sintered body, so that the reactivity of the molten glass with the sintered body is low. Moreover, the less the change in the contact angle time, the easier it is to maintain the wetting ease.
將評價之結果示於表1及圖11中。圖11中，縱軸表示接觸角(°)，橫軸表示經過時間(h：hours)。再者，10000質量ppm=1質量%。 The results of the evaluation are shown in Table 1 and Figure 11. In Fig. 11, the vertical axis represents the contact angle (°), and the horizontal axis represents the elapsed time (h: hours). Further, 10,000 mass ppm = 1 mass%.
[表1]
由表1及圖11明確可知：只要Al含量為0.1質量%以下，較佳為未達0.1質量%，Mg含量為0.7質量%以下，較佳為未達0.7質量%，Ti含量為0.9質量%以下，較佳為未達0.9質量%，Zr含量為3.5質量%以下，較佳為未達3.5質量%，Y含量為0.5質量%以上且10質量%以下，較佳為超過0.5質量%且未達10質量%，則接觸角之時間變化較少，且經過8小時後之接觸角較大，故而可獲得良好之耐久性。 As is clear from Table 1 and FIG. 11, as long as the Al content is 0.1% by mass or less, preferably less than 0.1% by mass, the Mg content is 0.7% by mass or less, preferably less than 0.7% by mass, and the Ti content is 0.9% by mass. Hereinafter, it is preferably less than 0.9% by mass, the Zr content is 3.5% by mass or less, preferably less than 3.5% by mass, and the Y content is 0.5% by mass or more and 10% by mass or less, preferably more than 0.5% by mass. When the amount is 10% by mass, the contact angle changes little, and after 8 hours, the contact angle is large, so that good durability can be obtained.
本發明對於支持輥、具有支持輥之板玻璃之成形裝置、及使用支持輥之板玻璃之成形方法而言較佳。 The present invention is preferred for a support roll, a forming apparatus for a sheet glass having a backup roll, and a forming method of a sheet glass using a backup roll.
本申請案係基於2011年11月17日向日本專利廳提出申請之日本專利特願2011-251274者，且係對該申請案主張優先權者，藉由參照該申請案之全部內容而將其包含。 The present application is based on Japanese Patent Application No. 2011-251274 filed on Jan. .
10‧‧‧板玻璃之成形裝置 10‧‧‧Sheet glass forming device
20‧‧‧金屬液槽 20‧‧‧metal tank
22‧‧‧浴槽 22‧‧‧ bath
24‧‧‧側壁 24‧‧‧ side wall
26‧‧‧頂板 26‧‧‧ top board
28‧‧‧空間 28‧‧‧ Space
30‧‧‧氣體供給路徑 30‧‧‧ gas supply path
32‧‧‧加熱器 32‧‧‧heater
32a‧‧‧發熱部 32a‧‧‧Fever Department
34‧‧‧驅動裝置 34‧‧‧ drive
40‧‧‧支持輥 40‧‧‧Support roller
50‧‧‧旋轉構件 50‧‧‧Rotating components
51‧‧‧外周部 51‧‧‧The outer part
52‧‧‧凹凸 52‧‧‧ bump
56A‧‧‧外周面 56A‧‧‧ outer perimeter
60‧‧‧安裝構件 60‧‧‧Installation components
70‧‧‧軸構件 70‧‧‧Axis components
G‧‧‧熔融玻璃帶 G‧‧‧Molten glass ribbon
S‧‧‧熔融金屬 S‧‧‧ molten metal
Y‧‧‧方向 Y‧‧‧ direction
圖1係表示本發明之一實施形態之板玻璃之成形裝置之局部剖面圖。 Fig. 1 is a partial cross-sectional view showing a molding apparatus for a sheet glass according to an embodiment of the present invention.
圖2係沿圖1之II-II線之剖面圖。 Figure 2 is a cross-sectional view taken along line II-II of Figure 1.
圖3係表示本發明之一實施形態之支持輥之前視圖。 Fig. 3 is a front view showing a support roller according to an embodiment of the present invention.
圖4係沿圖3之IV-IV線之局部剖面圖。 Figure 4 is a partial cross-sectional view taken along line IV-IV of Figure 3.
圖5係表示旋轉構件之變形例(1)之前視圖。 Fig. 5 is a front view showing a modification (1) of the rotating member.
圖6(a)~(c)係沿圖5之VI-VI線之剖面圖。 6(a) to 6(c) are cross-sectional views taken along line VI-VI of Fig. 5.
圖7係表示旋轉構件之變形例(2)之前視圖。 Fig. 7 is a front view showing a modified example (2) of the rotating member.
圖8係表示旋轉構件之變形例(3)之前視圖。 Fig. 8 is a front view showing a modification (3) of the rotating member.
圖9係表示旋轉構件之變形例(4)之前視圖。 Fig. 9 is a front view showing a modification (4) of the rotating member.
圖10係表示旋轉構件之變形例(5)之前視圖。 Fig. 10 is a front view showing a modification (5) of the rotating member.
圖11係表示例1~例4中之燒結體相對於熔融玻璃之潤濕性之時間變化的圖表。 Fig. 11 is a graph showing temporal changes in wettability of the sintered body in Examples 1 to 4 with respect to molten glass.
10‧‧‧板玻璃之成形裝置 10‧‧‧Sheet glass forming device
20‧‧‧金屬液槽 20‧‧‧metal tank
22‧‧‧浴槽 22‧‧‧ bath
24‧‧‧側壁 24‧‧‧ side wall
26‧‧‧頂板 26‧‧‧ top board
28‧‧‧空間 28‧‧‧ Space
30‧‧‧氣體供給路徑 30‧‧‧ gas supply path
32‧‧‧加熱器 32‧‧‧heater
32a‧‧‧發熱部 32a‧‧‧Fever Department
34‧‧‧驅動裝置 34‧‧‧ drive
40‧‧‧支持輥 40‧‧‧Support roller
50‧‧‧旋轉構件 50‧‧‧Rotating components
60‧‧‧安裝構件 60‧‧‧Installation components
70‧‧‧軸構件 70‧‧‧Axis components
G‧‧‧熔融玻璃帶 G‧‧‧Molten glass ribbon
S‧‧‧熔融金屬 S‧‧‧ molten metal
Y‧‧‧方向 Y‧‧‧ direction
Claims (10)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| JP2011251274 | 2011-11-17 |
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| Publication Number | Publication Date |
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| TW101140849A TWI582051B (en) | 2011-11-17 | 2012-11-02 | A support roll, a forming device having a plate glass for supporting the roll, and a method of forming a plate glass using a support roll |
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| JP (1) | JP6127978B2 (en) |
| KR (1) | KR102002655B1 (en) |
| CN (2) | CN105776824A (en) |
| TW (1) | TWI582051B (en) |
| WO (1) | WO2013073352A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2016135715A (en) * | 2013-05-16 | 2016-07-28 | 旭硝子株式会社 | Molding method of plate glass, and manufacturing apparatus of plate glass |
| JP2016135717A (en) * | 2013-05-16 | 2016-07-28 | 旭硝子株式会社 | Apparatus and method for manufacturing sheet glass, and glass ribbon |
| JP2016183070A (en) * | 2015-03-26 | 2016-10-20 | 旭硝子株式会社 | Support roll, glass manufacturing apparatus, and glass manufacturing method |
| CN105110607B (en) * | 2015-08-28 | 2017-05-24 | 河南省海川电子玻璃有限公司 | Ceramic edge rolling wheel for glass edge roller and preparation method thereof |
| JP6930464B2 (en) | 2018-03-09 | 2021-09-01 | Ｊｆｅスチール株式会社 | Annealing method and annealing furnace for steel sheet |
| JP7251444B2 (en) * | 2019-10-21 | 2023-04-04 | Ａｇｃ株式会社 | Glass plate manufacturing apparatus and glass plate manufacturing method |
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| CN1446765A (en) * | 2002-03-06 | 2003-10-08 | 舱壁玻璃公司 | Cleaner for lifting roller surface of float equipment in producing float glass strip |
| TW200842114A (en) * | 2007-02-05 | 2008-11-01 | Asahi Glass Co Ltd | Method for producing plate glass by float process |
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| JP3837729B2 (en) * | 1998-03-05 | 2006-10-25 | 日本電気硝子株式会社 | Sheet glass forming equipment |
| JP3754271B2 (en) * | 2000-04-28 | 2006-03-08 | 新日本製鐵株式会社 | Butterfly valve and manufacturing method thereof |
| JP4520192B2 (en) * | 2004-03-22 | 2010-08-04 | セントラル硝子株式会社 | Method for producing float glass sheet |
| JP2008239370A (en) | 2007-03-26 | 2008-10-09 | Asahi Glass Co Ltd | Method for producing plate glass by floating process |
| JP4974053B2 (en) * | 2007-04-19 | 2012-07-11 | 日本電気硝子株式会社 | Forming roller and glass plate forming apparatus |
| JP2010143800A (en) * | 2008-12-19 | 2010-07-01 | Nippon Electric Glass Co Ltd | Apparatus for producing glass plate |
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| US8146388B2 (en) * | 2009-10-29 | 2012-04-03 | Corning Incorporated | Low friction edge roll to minimize force cycling |
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- 2012-10-24 CN CN201610082368.6A patent/CN105776824A/en active Pending
- 2012-10-24 KR KR1020147007121A patent/KR102002655B1/en active IP Right Grant
- 2012-10-24 CN CN201280051763.8A patent/CN103889910A/en active Pending
- 2012-10-24 JP JP2013544198A patent/JP6127978B2/en active Active
- 2012-10-24 WO PCT/JP2012/077520 patent/WO2013073352A1/en active Application Filing
- 2012-11-02 TW TW101140849A patent/TWI582051B/en active
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| JPH01219029A (en) * | 1988-02-29 | 1989-09-01 | Hoya Corp | Formation of thin sheet glass |
| CN1446765A (en) * | 2002-03-06 | 2003-10-08 | 舱壁玻璃公司 | Cleaner for lifting roller surface of float equipment in producing float glass strip |
| TW200842114A (en) * | 2007-02-05 | 2008-11-01 | Asahi Glass Co Ltd | Method for producing plate glass by float process |
Also Published As
| Publication number | Publication date |
|---|---|
| KR102002655B1 (en) | 2019-07-23 |
| CN105776824A (en) | 2016-07-20 |
| KR20140098736A (en) | 2014-08-08 |
| CN103889910A (en) | 2014-06-25 |
| TW201326062A (en) | 2013-07-01 |
| JP6127978B2 (en) | 2017-05-17 |
| JPWO2013073352A1 (en) | 2015-04-02 |
| WO2013073352A1 (en) | 2013-05-23 |
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