KR102045833B1 - Glass plate manufacturing device and manufacturing method - Google Patents

Glass plate manufacturing device and manufacturing method Download PDF

Info

Publication number
KR102045833B1
KR102045833B1 KR1020147029127A KR20147029127A KR102045833B1 KR 102045833 B1 KR102045833 B1 KR 102045833B1 KR 1020147029127 A KR1020147029127 A KR 1020147029127A KR 20147029127 A KR20147029127 A KR 20147029127A KR 102045833 B1 KR102045833 B1 KR 102045833B1
Authority
KR
South Korea
Prior art keywords
glass
region
glass ribbon
barrel head
ribbon
Prior art date
Application number
KR1020147029127A
Other languages
Korean (ko)
Other versions
KR20150002678A (en
Inventor
요시히로 시라이시
마사키 고토
겐키 고바야시
Original Assignee
에이지씨 가부시키가이샤
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 에이지씨 가부시키가이샤 filed Critical 에이지씨 가부시키가이샤
Publication of KR20150002678A publication Critical patent/KR20150002678A/en
Application granted granted Critical
Publication of KR102045833B1 publication Critical patent/KR102045833B1/en

Links

Images

Classifications

    • 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
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Abstract

An object of this invention is to provide the technique which can manufacture a glass ribbon by the float method, without generating a local deformation | transformation part called a straw. The present invention comprises a float bath with molten metal constituting the movement path of the glass ribbon and a plurality of pairs of top rolls, the top rolls each of which has a horizontal axis extending horizontally on both sides in the width direction of the movement path, A plurality of barrel heads having a barrel head pressurized at the widthwise end portion of the glass ribbon conveyed along the movement path, and pressurized by the glass ribbon to exert a tensile force in the outward direction on the glass ribbon, The nip area | region which shows the distance of a pressurized position and the edge of an edge of a glass ribbon relates to the manufacturing apparatus of a small glass plate as it goes to the downstream side from the upstream side of a midstream region.

Description

Glass plate manufacturing apparatus and manufacturing method {GLASS PLATE MANUFACTURING DEVICE AND MANUFACTURING METHOD}

The present invention relates to an apparatus and a manufacturing method for producing a thin glass plate according to the float bath method.

BACKGROUND ART Glass substrates for flat panel displays, such as liquid crystal displays and plasma displays, have recently increased in size and thickness.

As an example of the manufacturing method of this kind of glass substrate, the float method which uses the float bath which stored molten metals, such as a metal tin, is stretched and shape | molded thin molten glass in a horizontal direction on a molten metal, and the shaping | molding method is known. According to this float method, a strip | belt-shaped glass ribbon can be shape | molded by floating the molten glass on the molten metal of a float bath, ensuring the required thickness according to the objective, and taking out this molten glass in a horizontal direction. By cutting this glass ribbon into the required size, a glass substrate of a desired size can be obtained.

According to this float method, in order to manufacture the glass substrate which is enlarged and thinned as mentioned above, the shaping | molding apparatus called a top roll which pulls the width direction both ends of the glass ribbon outward on the molten metal of a float bath is performed. It installs and the method of thinning by extending a glass ribbon to the width direction both ends side is employ | adopted. The thinly stretched glass ribbon is cut into the required size after slow cooling, and the desired glass substrate can be obtained by polishing and washing. According to this float method, a large and thin glass substrate is produced in large quantities, and as a glass substrate, a large glass substrate having a thickness of about 0.7 mm and a length and a width of several meters is produced.

Also, in recent years, portable information terminal devices have been manufactured in large quantities, and as an example of a liquid crystal panel applied to the portable information terminal device, after manufacturing a liquid crystal panel using a glass substrate having a thickness of about 0.7 mm, There is provided a liquid crystal panel having a glass substrate thinned by a method such as wet etching and thinned to a thickness of about 0.3 mm.

FIG. 8 shows an example of a float bath used in the float method. The float bath 100 includes a bottom bath 102 having molten metal 101 such as molten tin therein, and the bottom The molten glass 103 flows in from the converter of the melting furnace to the inlet side of the bath 102. The molten glass 103 is stretched to a desired width by the plurality of top rolls 105 on the molten metal 101, and gradually cooled to form a glass ribbon 106 having a required width and thickness.

As an example of the top roll 105 applied to this kind of float bath 100, it is formed in disk shape as shown in FIG. 9, and the outer periphery 105a of saw blade shape is provided in the outer periphery in two stages. The top roll provided with one barrel head 105A is known (refer patent document 1).

The barrel head 105A shown in FIG. 9 applies the tension force in the outward direction to the edge part 103a, making the outer peripheral edges 105a and 105a bite into the edge part 103a of the molten glass 103, and melting The width and thickness of the glass ribbon 106 can be adjusted by adjusting the width of the glass 103.

Japanese Patent Laid-Open No. 11-236231

From the above background, glass substrates tend to become thinner, and the use of a glass substrate having a thickness of about 0.3 mm from the beginning as a glass substrate for a panel of a portable information terminal device has also been considered. In addition, in the glass substrate for flat panel displays, further thinning is desired.

Conventionally, the molten glass 103 immediately after flowing in and expanding the float bath 100 is a high temperature and liquid phase, and thus cannot be easily stretched, but the molten glass 103 is a downstream region in an upstream region of the float bath 100. Since it cools slowly as it moves to and gradually increases viscosity, the molten glass 103 whose viscosity became high can be stretched and expanded by the barrel head 105A.

However, since the molten glass 103 with the tensile force applied to the flowing side tends to be reduced, the thinner the molten glass 103 is to be pressed, the more it is necessary to press the glass with a stronger force to apply a strong tensile force.

As a result, the edge portion of the barrel head 105A is inserted more deeply into the edge portion 103a of the molten glass 103 than in the state shown in FIG. 9, and the molten glass 103 is greatly deformed in the vicinity of the edge portion thereof. I have a problem to let you go.

FIG. 10: is a figure for demonstrating the state which pressed 105 A of barrel heads with the strong force with respect to the edge part 103a of the molten glass 103. FIG.

When the barrel head 105A is strongly pressed against the edge portion 103a of the molten glass 103 shown in FIG. 10A as shown in FIG. 10B, the edge portion 103a causes the barrel. It is deformed into a U-shaped bag shape so as to sink deeply in proportion to the pressing force of the head 105A. For example, when the glass deformed as it is in this bag state is hardened, there is a problem that a local deformation portion 110 called a cross-sectional T-shaped straw is generated as shown in FIG.

In addition, when the barrel head 105A is strongly pressurized with respect to the edge part 103a of the molten glass 103, as shown in FIG.10 (b), as shown in FIG.10 (c), a cross section will be When the glass is hardened as it is in this state, and as shown in Fig. 12, the deformed portion is deformed so as to overlap the bag portion 111a in the upper direction and the bag portion 111b in the lower direction as shown in FIG. There is a problem that a local deformation portion 111 called a straw is produced. When this S-shaped local deformation part 111 is produced | generated, as shown to the arrow a and arrow b of FIG. 10 (c), a molten metal may be rolled to the inner side of glass, As a result, after There is a problem that causes the glass to crack in the slow cooling process. For example, since the metal tin and the glass plate have different coefficients of thermal expansion, there is a possibility that a stress acts on the glass plate of the portion where the metal tin is rolled up and cracks due to thermal shrinkage during slow cooling.

When the glass ribbon is cut in the cutting process with the local deformation parts 110 and 111, when the glass ribbon is cut and folded into a glass plate having a desired size, it causes cracks at a position or direction different from the desired cutting position or direction. There is a risk of inhibiting stable production. The generation of the local deformation parts 110 and 111 is remarkable in the thin glass plate, and especially when the glass plate having a thickness of 1 mm or less is manufactured by the float method as in the glass substrate for the display device described above. have.

Based on these backgrounds, the present inventors have variously studied a technique for forming a molten glass ribbon by forming a molten glass by a float method to produce a thin glass ribbon of 1 mm or less. When shaping a ribbon, by devising about the position where a barrel head gives a tension, it discovered that the generation | occurrence | production of the local deformation | transformation part called a straw can be suppressed, and the present invention was reached.

When forming a thin glass ribbon by a float method, an object of this invention is to provide a manufacturing apparatus and a manufacturing method which can manufacture a glass ribbon without generating a local deformation | transformation part, and contribute to the stable production of a glass plate.

The present invention provides a float bath for forming a glass ribbon by accumulating molten metal, forming a moving path of the molten glass on the molten metal, moving the molten glass from the upstream region to the downstream region of the moving path, A plurality of top rolls are provided on the width direction both sides of the movement path from the upstream area | region to the downstream area of the movement path in this float bath, and the said top roll is horizontally horizontally on both sides of the movement path of a molten glass, respectively. And a barrel head which is provided on the axis of rotation extending in the direction and on the tip end side of the axis of rotation, and pressed to the widthwise end of the glass ribbon conveyed from the upstream region to the downstream region along the moving path through the upstream region. The moving mirror pressed against the ribbon to exert a tensile force in the outward direction on the widthwise end of the glass ribbon; In the several barrel head of the upstream region of a furnace, the width | variety of the nip area which shows the distance of the pressurization position of the barrel head with respect to the said glass ribbon and the edge of the edge near the glass ribbon is smaller than the upstream side, manufacture of glass plate Relates to a device.

In this invention, the area | region whose number of the viscosity of the said glass ribbon is 5.29-6.37 dPa * s is made into a midstream region, and the magnitude relationship of the width | variety of the nip region of the some barrel head provided in this middlestream region is said upstream side. It is related with the manufacturing apparatus of the glass plate which meets a small relationship on the downstream side.

The position of the line mark formed by the barrel head upstream from the said specific barrel head is formed near the inside of the said glass ribbon rather than the position of the line mark which the said specific barrel head presses and forms the said glass ribbon. The manufacturing apparatus of the glass plate which becomes.

This invention relates to the manufacturing apparatus of the glass plate whose thickness of the glass ribbon shape | molded by the said float bath is 1 mm or less.

This invention relates to the manufacturing apparatus of the glass plate with which the alkali free glass which has the following compositions is applied in the mass percentage display of an oxide reference | standard as said molten glass.

SiO 2 : 50 to 73%, Al 2 O 3 : 10.5 to 24%, B 2 O 3 : 0 to 12%, MgO: 0 to 8%, CaO: 0 to 14.5%, SrO: 0 to 24%, BaO : from 0 to 13.5%, MgO + CaO + SrO + BaO: 9 to 29.5%, ZrO 2: 0 to 5%.

This invention relates to the manufacturing apparatus of the glass plate with which the alkali free glass which has the following compositions is applied in the mass percentage display of an oxide reference | standard as said molten glass.

SiO 2 : 58 to 66%, Al 2 O 3 : 15 to 22%, B 2 O 3 : 5 to 12%, MgO: 0 to 8%, CaO: 0 to 9%, SrO: 3 to 12.5%, BaO : 0 to 2%, MgO + CaO + SrO + BaO: 9 to 18%, ZrO 2: 0 to 5%.

This invention relates to the manufacturing apparatus of the glass plate with which the alkali free glass which has the following compositions is applied in the mass percentage display of an oxide reference | standard as said molten glass.

SiO 2 : 54 to 73%

Al 2 O 3 : 10.5 to 22.5%

B 2 O 3 : 0 to 5.5%

MgO: 0 to 8%

CaO: 0-9%

SrO: 0-16%

BaO: 0-2.5%

MgO + CaO + SrO + BaO: 8-26%

This invention is a manufacturing method of the glass plate which shape | molds while moving a molten glass along the movement path of the molten glass provided on the molten metal, and manufactures a glass ribbon, Comprising: When a glass ribbon having a thickness of 1 mm or less is produced by applying a tensile force in the outward direction to both ends of the glass ribbon by a plurality of pairs of top rolls disposed on both ends in the width direction, the top roll is moved from an upstream region along the movement path. The barrel head which exerts the tension | pulling force of the outward direction to the width direction edge part of the glass ribbon conveyed to a downstream area | region, and the several barrel head provided in the middle region of the said movement path | route has the pressurized position of the barrel head with respect to the said glass ribbon, The width of the nip area showing the distance of the edge of the edge immediately adjacent to the glass ribbon is on the downstream side than the upstream side. Reduced by a method of manufacturing a glass sheet to the action of a tensile force to both ends of the glass ribbon.

This invention makes the magnitude relationship of the width | variety of the width | variety of the nip area | region of the several barrel head provided in this middlestream region using the area | region whose number of the viscosity of the said glass ribbon is 5.29-6.37 dPa * s as a middlestream region, from the above upstream side. It is related with the manufacturing method of the glass plate which has a small relationship in a downstream side.

This invention forms the position of the line mark formed by the barrel head upstream from the said specific barrel head near the inside of the said glass ribbon rather than the position of the line mark which the said specific barrel head presses and forms the said glass ribbon. It is related with the manufacturing method of a glass plate.

This invention relates to the manufacturing method of the glass plate which uses the alkali free glass which has the following compositions in the mass percentage display of an oxide reference | standard as the said molten glass.

SiO 2 : 50 to 73%, Al 2 O 3 : 10.5 to 24%, B 2 O 3 : 0 to 12%, MgO: 0 to 8%, CaO: 0 to 14.5%, SrO: 0 to 24%, BaO : from 0 to 13.5%, MgO + CaO + SrO + BaO: 9 to 29.5%, ZrO 2: 0 to 5%.

This invention relates to the manufacturing method of the glass plate which uses the alkali free glass which has the following compositions in the mass percentage display of an oxide reference | standard as the said molten glass.

SiO 2 : 58 to 66%, Al 2 O 3 : 15 to 22%, B 2 O 3 : 5 to 12%, MgO: 0 to 8%, CaO: 0 to 9%, SrO: 3 to 12.5%, BaO : 0 to 2%, MgO + CaO + SrO + BaO: 9 to 18%, ZrO 2: 0 to 5%.

This invention relates to the manufacturing method of the glass plate which uses the alkali free glass which has the following compositions in the mass percentage display of an oxide reference | standard as the said molten glass.

SiO 2 : 54 to 73%

Al 2 O 3 : 10.5 to 22.5%

B 2 O 3 : 0 to 5.5%

MgO: 0 to 8%

CaO: 0-9%

SrO: 0-16%

BaO: 0-2.5%

MgO + CaO + SrO + BaO: 8-26%

According to the manufacturing apparatus and the manufacturing method of this invention, in the midstream region of the movement path of a float bath, when shape | molding while extending | stretching the edge part of a glass ribbon by a barrel head, the nip area | region of the barrel head provided in the midstream region is formed. The width is formed by sequentially decreasing the width from the upstream side to the downstream side of the midstream region, and the edge of the glass ribbon is positioned at the position of the glass ribbon pressed by the barrel head on the downstream side than the position of the glass ribbon pressed by the barrel head on the upstream side. Since it can be near, the downstream barrel head expands the part closer to an edge of an edge more than the edge of the glass ribbon which the upstream barrel head extended. Thus, even when the upstream barrel head exerts a strong tensile force while strongly pressing and deforming the glass ribbon, the barrel edge of the downstream side pulls outward from the deformed portion of the glass ribbon. The glass ribbon can be molded while correcting the part.

As a result, a thin glass ribbon can be obtained without generating a local deformation | transformation part called a straw in the glass ribbon of a midstream region. And since the glass ribbon which does not produce a local deformation | transformation part is cut | disconnected in a subsequent process, and it is set as a glass plate, a glass plate of a desired dimension can be obtained without generating a crack or a notch.

When producing a glass plate thinner than 1 mm, preferably 0.7 mm or less, more preferably 0.5 mm or less, even more preferably 0.3 mm or less, and particularly preferably 0.1 mm or less, such as a glass substrate for a display device. Although the glass ribbon of the midstream region of is easy to generate a local deformation part called a straw, it uses the barrel head mentioned above with respect to the molten glass of this midstream region, and by exerting a tension force near an edge of an edge, on the end side of a glass ribbon The amount of deformation in the thickness direction can be reduced, and a thin glass ribbon which does not generate local deformation can be obtained. By cutting the glass ribbon, a thin glass plate having a desired size of 1 mm or less without cracks, notches, etc. can be obtained. .

1 is a schematic diagram showing an overall configuration of a glass plate manufacturing apparatus of a first embodiment according to the present invention.
FIG. 2: is a block diagram which shows an example of the arrangement | positioning state of the top roll provided in the same manufacturing apparatus.
It is a block diagram which shows an example principal part of the arrangement | positioning state of the top roll provided in the same manufacturing apparatus.
Fig. 4 shows a barrel head applied to a top roll installed in the same manufacturing apparatus. Fig. 4A is a sectional view of a reference barrel head, and Fig. 4B is a front view of a multistage barrel head. (C) is sectional drawing of a multistage barrel head.
5 is a perspective view of a multi-stage barrel head installed in the same manufacturing apparatus.
It is a graph which shows the viscosity state for every temperature with respect to an example of the molten glass supplied to the same manufacturing apparatus.
It is a graph which shows an example of the compressive stress distribution in the edge part of the glass ribbon supplied to a float bath.
8 is a plan view schematically showing an example of a float bath in which a conventional top roll is raised.
It is sectional drawing which shows an example of the state which pushed the barrel head provided in the conventional top roll in the edge part of the glass ribbon.
FIG. 10: shows the relationship of the edge of a molten glass and the conventional barrel head, FIG. 10 (a) is sectional drawing which shows the edge of a glass ribbon, and FIG. 10 (b) shows a barrel head at the edge of a glass ribbon. Sectional drawing which shows an example of the pressed state and FIG.10 (c) is sectional drawing which shows an example of the local deformation | transformation part (strow) of cross-section S type formed in the edge side of a glass ribbon.
It is sectional drawing which shows an example of the local deformation | transformation part of the cross-sectional T shape formed in the edge side of a glass ribbon.
It is sectional drawing which shows an example of the local deformation | transformation part of cross section S shape formed in the edge side of a glass ribbon.

"First embodiment"

EMBODIMENT OF THE INVENTION Hereinafter, although 1st Embodiment of the manufacturing apparatus of the glass plate which concerns on this invention is described with reference to an accompanying drawing, this invention is not limited to embodiment demonstrated below.

BRIEF DESCRIPTION OF THE DRAWINGS The 1st Embodiment schematic structure of the manufacturing apparatus of the glass plate which concerns on this invention is shown, The manufacturing apparatus (float bath) 1 of the glass plate of this embodiment is a substantially rectangular refractory when viewed in plan view. The bath 2 which consists of a furnace, molten metal 3, such as metal tin accommodated in the inside of this bathtub 2, and the top roll 11 arrange | positioned in multiple inside the bathtub 2 are provided, have.

The bath 2 is composed of a refractory bottom structure, side walls and an upper structure, but only the bottom structure is shown in a plan view in FIG. The upper structure side of the bathtub 2 is provided with an auxiliary facility such as a gas supply pipe such as a non-oxidizing gas, a temperature controller, etc., so that the atmosphere of the bathtub 2 can be controlled to a non-oxidizing gas atmosphere, The temperature of the upper space part can be controlled to a desired temperature.

In FIG. 1, the inlet part 5 for supplying molten glass G on the molten metal 3 from the converter of the glass melting furnace provided in the previous process is provided in the left edge part side of the bathtub 2. In the bathtub 2, an outlet portion 6 is formed at an end opposite to the side where the inlet portion 5 is provided, and a plurality of conveying rolls 7 are arranged outside the outlet portion 6, and a slow cooling line is provided. 7A is formed.

On the molten metal 3 from the inlet part 5 to the outlet part 6 in the bathtub 2, the rectangular movement path 8 is partitioned in plan view for shape | molding molten glass G. In FIG. .

When the molten glass G flows in from the inlet part 5 on the molten metal 3 along this movement path 8, the molten glass G will be expanded to the required thickness and width, and the glass ribbon 9 of a molten state will be made. ), Gradually cooled and moved to the outlet 6 side, and the glass ribbon 10 as a final | finished form of the strip | belt shape uniformed in width is formed, and this glass ribbon 10 is removed from the outlet part 6. It discharges to the slow cooling line 7A side. In the present embodiment, since the planar shape of the bathtub 2 is formed in a rectangular shape, the movement path 8 partitioned on the molten metal 3 inside the bathtub 2 is also rectangular in shape. The planar shape of the path 8 is not limited to the rectangular shape, and any shape conforming to the planar shape of the bath 2 is possible.

In the bath 2 of the present embodiment, the inlet portion 5 and the outlet portion 6 are arranged at predetermined intervals from the upstream region to the downstream region along the width direction both ends of the movement path 8. A plurality of top rolls 11 are arranged. In the present embodiment, the molten glass G supplied from the inlet portion 5 is stretched in the width direction by the plurality of top rolls 11 described above and becomes downstream as the glass ribbon 9 in the molten state described above. It is conveyed to the area | region (outlet part 6 side), and the strip | belt-shaped glass ribbon 10 of predetermined width is finally obtained.

As shown in FIG. 2, in the bathtub 2 of this embodiment, it is 16 pieces from the position for starting to expand the width | variety of the molten glass G in the width direction both ends of the movement path 8, respectively. Top rolls 11 are arranged at predetermined intervals. These 16 top rolls 11 are labeled with A 0 to A 15 conveniently for convenience, and individual arrangements will be described below.

Of these top rolls 11, the top roll 11A 0 of the first stage to the 15th top roll A 15 (that is, the top roll 11A 15 is counted from the top roll 11A o of the first stage to 16 2) is a top roll provided with the reference barrel head 18 demonstrated later. In addition, in this embodiment, as the 5th top roll 11A 5- the 10th top roll 11A 10 , the multistage barrel head 14 demonstrated later instead of the reference barrel head 18 is provided. It can also be set as one top roll.

The first stage top rolls 11A 0 to the fifteenth top roll A 15 include a rotation shaft 17 shown in FIG. 4A and a reference barrel head 18 integrated with its tip. It is composed.

The mechanism for rotating the respective rotary shafts 17 and the mechanism for moving the rotary shafts 17 is omitted in FIGS. 1 and 2, but the rotary shafts 17 penetrate the sidewalls of the tubs 2 and the tubs 2. It extends substantially horizontally to the outer side of the inside, and the rotation drive apparatus and the moving apparatus are provided in the outer side of the bathtub 2. As the moving device of the rotary shaft 17, a moving device provided with a rotation drive device such as a motor can be applied to the moving cart provided to be movable along the rail member provided outside the position where the bathtub 2 is installed. have. These rotation drive devices and moving devices are equivalent to the top roll drive devices and moving devices provided in a general float bath, and the rotation shaft 17 is, for example, in the width direction both ends of the moving path 8 in a rotationally driven state. Is arranged to be movable in the width direction of the movement path (8). 1 to 3, these rotational drive devices and moving devices are omitted, and only the tip barrel side of the rotary shaft 17 and the reference barrel head 18 provided therein are shown.

As shown in Fig. 4A, the reference barrel head 18 includes two outer stages (two rows) of outer circumferential edges 19 on the outer circumferential wall 20a of the rotating drum 20. Both the rotating shaft 17 and the reference barrel head 18 have a hollow structure, and the hollow portion 17a formed inside the rotating shaft 17 and the hollow portion formed inside the rotating drum 20 ( 20b) are in communication with each other. The supply pipe 17b of cooling water is provided in the inside of the rotating shaft 17, and the return flow path 17c of the cooling water is formed in the clearance gap between the supply pipe 17b and the inner peripheral wall of the rotating shaft 17. As shown in FIG. With these constitutions, the cooling shaft is supplied from the supply pipe 17b to the hollow portion 20b of the rotary drum 20, and the cooling water is recovered through the return flow passage 17c to thereby rotate the rotary shaft 17 and the rotary drum 20. It is configured to cool from the inside. In addition, you may change suitably the cross-sectional shape of the hollow part 20b so that water flow may circulate efficiently.

The outer circumferential edge 19 of the reference barrel head 18 has a plurality of quadrangular pyramid-shaped edges as shown in FIG. 4A along the outer circumferential wall 20a of the thin cylindrical rotating drum 20. It is formed continuously so that it may become two steps (two rows). Since these outer edges 19 are formed in the circumferential direction of the rotating drum 20 at the same pitch with each blade end having the same shape, one row of the outer peripheral edges 19 circumscribing the rotating drum 20 has two rows in total. It has a formed two-stage structure. In the rotary drum 20 of this embodiment, the end surface wall 20c of the side integrated with the rotating shaft 17 side, and the end surface wall 20d of the front end side of the reference barrel head 18 are flat form. Formed. The end face wall 20c may be inclined obliquely outward from the center of the barrel head.

From the top roll 11A 0 of the first stage to the fourth top roll 11A 4 , the molten glass G introduced from the inlet 5 into the upper movement path 8 of the molten metal 3 is introduced. It is provided with respect to the upstream area | region of the movement path 8 which slows cooling and a viscosity starts to rise and becomes the glass ribbon 9 of a molten state.

The fifth top roll 11A 5 to the tenth top roll 11A 10 are used in the midstream region of the movement path 8, that is, in the region where the glass ribbon 9 has a higher viscosity than the upstream region. Is installed.

In the eleventh top roll 11A 11 to the fifteenth top roll 11A 15 of the structure, the viscosity of the downstream region of the movement path 8, that is, the glass ribbon 9 is higher than that of the midstream region. It is provided about the area | region which rises.

In the manufacturing apparatus 1 of this embodiment, upstream with respect to the width | variety of each nip area | region of 5th top roll 11A 5 thru | or 10th top roll 11A 10 provided in the midstream region. The reference barrel head 18 on the downstream side has a width of the nip region that is narrower than the reference barrel head 18 on the side. Although the 5th top roll 11A 5- the 8th top roll 11A 8 are shown typically in FIG. 3 , the reference barrel head 18 of the 5th top roll 11A 5 is shown. Is the distance from the position pressed on the upper surface of the glass ribbon 9 to the edge of the edge of the glass ribbon 9 in the immediate vicinity, in other words, from the position pressed on the upper surface of the glass ribbon 9, the rotation shaft 17 The distance a to the edge of the edge of the glass ribbon 9 is defined as the width of the nip region.

According to this definition, the width of the nip region of the fifth top roll 11A 5 , the width of the nip region of the sixth top roll 11A 6 , and the seventh aspect of the width of the nip region. The width of the nip region of the top roll 11A 7 and the width of the nip region of the eighth top roll 11A 8 are set so as to become smaller in this order. Likewise, the width of the nip area of the width and the 10th second top roll (11A 10) in the nip region of the addition, but not shown in Figure 3 ninth top roll of the second (11A 9) in a consecutive in these sequential smaller It is set to lose.

In the present embodiment, but it arranged to be successively reduced for each of the width of the nip area of the 5th of the top roll (11A 5) to the top roll (11A 10) of the 10th of the middle region, a plurality of the middle region Top roll 11 of, so good when decreasing the width of the nip area of any of the top roll 11 in all downstream any top roll 11 on the upstream side, the top roll of the fifth (11A 5) to In the tenth top roll 11A 10 , the width of the nip region may be sequentially reduced in two or more arbitrary number of top rolls 11. Therefore, you may make it small intermittently, for example, making the width | variety of a nip area | region small for every top roll 11 of one space | interval. Or in the some top roll 11 arrange | positioned not only to an upstream region but from an upstream region to a midstream region, the width | variety of the nip region from an upstream side to a downstream side among these some top rolls 11. In the plurality of top rolls 11 arranged sequentially from the midstream region to the downstream region, the width of the nip region may be sequentially reduced from the upstream side to the downstream side among the plurality of top rolls 11. do.

By the way, in the top roll 11 of the present embodiment, instead, a reference barrel head 18 relative to the fifth of the top roll (11A 5) to the top roll of the 10th (11A 10) as described above You may use the multistage barrel head 14 integrated with the front-end | tip part of the rotating shaft 13 shown to Fig.4 (c).

The multi-stage barrel head 14, as shown in (b), (c), and FIG. 5 of FIG. Equipped with. The rotating shaft 13 and the multi-stage barrel head 14 both have a hollow structure, and the hollow portion 13a formed inside the rotating shaft 13 and the hollow portion formed inside the rotating drum 16 ( 16b) are in communication with each other. The supply pipe 13b of cooling water is provided in the inside of the rotating shaft 13, and the return flow path 13c of the cooling water is formed in the clearance gap between the supply pipe 13b and the inner peripheral wall of the rotating shaft 13. As shown in FIG. With these constitutions, the cooling shaft is supplied from the supply pipe 13b to the hollow portion 16b of the rotary drum 16, and the cooling water is recovered through the return flow passage 13c to thereby rotate the rotary shaft 13 and the rotary drum 16. It is configured to be cooled from the inner side of the.

The outer circumferential edge 15 of the multi-stage barrel head 14 is a quadrangular pyramid as shown in FIGS. 4B, 4C, and 5 along the outer circumferential wall 16a of the cylindrical rotating drum 16. Many blade ends of the die are formed continuously so as to have six stages (six rows). These outer edges 15 are formed in the circumferential direction of the rotating drum 16 at the same pitch with each blade end having the same shape, so that one row of the outer edges 15 circumscribing the rotating drum 16 has six rows in total. It has a six-stage structure formed. In the rotary drum 16 of this embodiment, the end surface wall 16c of the side integrated with the rotating shaft 13 side, and the end surface wall 16d of the front end side of the multi-stage barrel head 14 are flat form. Formed. In addition, the outer periphery blade 15 formed in the multistage barrel head 14 is not limited to a six-stage structure, and may be any three or more stages, four stages, five stages, or seven stages or more. However, if the number of stages is more than necessary, the glass ribbon 9 will be cooled more than necessary. Therefore, three or more stages, for example, about 4 to 8 stages, may be used in such a degree that the glass ribbon 9 is not cooled too much. desirable.

As an example, the viscosity of the glass ribbon 9 of the said molten state is shown in FIG. 6 until the molten glass of general alkali free glass changes in viscosity, hardens, and becomes a glass ribbon with temperature fall. .

In the state which shows the change of the viscosity shown in FIG. 6, the common number of the viscosity of the viscosity of the glass ribbon 9 and the upstream area | region of the movement path 8, and the common number of the viscosity of the glass ribbon 9 are the area where the common number of the viscosity (eta) of the glass ribbon 9 is less than 5.29. The region whose value is 5.29-6.37 can be defined as the downstream region of the movement path 8 by the middle region of the movement path 8, and the area where the common number of the viscosity of the glass ribbon 9 exceeds 6.37. In addition, corresponding to a region of the logarithm of the viscosity of the glass ribbon (9) 5.29 to 6.37-in area is, the viscosity (η) of the glass ribbon (9) 10 5.29 to 10 6.37 dPa · s.

The top rolls 11A 0 to 11A 15 are each not inclined in parallel to the width direction of the glass ribbon 9 but are inclined at a slight angle. For example, when the moving path 8 is viewed in a plane, the moving direction of the glass ribbon 9 in the moving path 8 (from the inlet part 5 toward the outlet part 6, the side wall of the bathtub 2) A plane including an outer circumferential edge 19 of each row of the reference barrel head 18, assuming an XY coordinate system defining the direction parallel to the Y axis direction and the width direction of the movement path 8 as the X axis direction, Or the plane containing the outer peripheral edge 15 of each row of the multistage barrel head 14 is assumed.

In this case, the plane 19a including the outer peripheral edges 19 arranged in one row in the circumferential direction of the reference barrel head 18 shown in FIG. 2, or arranged in one row in the circumferential direction of the multistage barrel head 14. The plane 14a including the outer circumferential edge 15 is inclined in plan view so as to have an inclination angle θ of about 0 to 16 degrees with respect to the Y axis. Further, the outer circumferential edge 19 of the reference barrel head 18 or the outer circumferential edge 15 of the multistage barrel head 14 are both pressed from above substantially perpendicular to the glass ribbon 9. In other words, each of the rotary shafts 13 and 17 of the barrel heads 14 and 18 moves up and down while being arranged almost horizontally, respectively, so that the barrel heads 14 and 18 can be pressed against the ends of the glass ribbon 9. It is installed to be movable.

As an example of the inclination arrangement, for example, in the first top roll 11A 1 to the fifteenth top roll 11A 15 illustrated in FIG. 2, the first top roll 11A 1 is sequentially ordered from the first top roll 11A 1 . Each barrel head is arranged with the angle of inclination gradually large, the angle of inclination is increased up to the maximum angle of inclination of the upstream region, and in the reference barrel head 18 of the top roll in the downstream region, the angle of inclination is gradually reduced to reduce the inclination angle. In the reference barrel head 18 of the top roll, an example in which the inclination angle is set to 0 degrees may be mentioned. The inclination arrangement state of each barrel head is not limited to the example described here, and may be any inclination arrangement having the maximum inclination angle in the reference barrel head 18 provided in the midstream region.

In order to manufacture the glass ribbon 10 using the glass manufacturing apparatus (float bath) 1 of this embodiment, molten glass G from the inlet part 5 to the upper movement path 8 of the molten metal 3 is carried out. ) Is expanded by supplying and expanding a force. A tensile force is applied to the outside of the width direction both ends of the glass ribbon 9 while pressing the glass ribbon 9 in the molten state using the reference barrel head 18 provided in plurality. The width and thickness of (9) can be adjusted to finally obtain a glass ribbon 10 having a desired width. In addition, a glass plate can be obtained by cutting this glass ribbon 10 to a desired size in the cutting process of the subsequent process of the slow cooling line 7A.

In the manufacturing apparatus 1 of this embodiment, the top roll (11A 0) to the top roll (11A 15) is, based on the barrel so provided with a head 18, a glass to the outer peripheral edge 19 of the two-stage structure ribbon It rotates by pressing to the width direction edge part side of (9), and it is the outer side with respect to the width direction both ends of the glass ribbon 9 of an upstream area | region, the upstream region, and the downstream region by the reference barrel head 18 of these top rolls, respectively. The glass ribbon 9 can be expanded by applying the necessary tensile force in the direction.

In the manufacturing apparatus 1 of this embodiment, the top roll of the fifth (11A 5) through the 10th top roll (11A 10) of the reference barrel head of the upstream side with respect to the width of each of the nip area of the ( The reference barrel head 18 on the downstream side has a width of the nip region which is smaller sequentially than 18). But illustrates a fifth top roll of the second (11A 5) to the top roll of the eighth (11A 8) in the middle area in Figure 3, each top roll (11A 5 to 11A 8) has a respective axis of rotation (17) By moving in the direction of the arrows T 5 to T 8 in FIG. 3, a tensile force of a desired magnitude is applied to the ends of the glass ribbon 9 to expand the width of the glass ribbon 9.

Thereby, as shown in FIG. 3, the trace of the line mark which the upstream reference barrel head 18 draws on the upper surface of the glass ribbon 9 (the blade edge of the outer peripheral blade 19 is located on the upper surface of the glass ribbon 9). As the reference barrel head 18 is rotated while being pressed, the reference barrel head 18 on the downstream side of the line marks drawn on the upper surface of the glass ribbon 9 is lower than the track of the line marks imprinted on the upper surface of the glass ribbon 9. The trajectory is drawn at the position near the edge of the glass ribbon 9. That is, as shown in Figure 3, a fifth of the top roll (11A 5) to draw line marks (A 5) than the sixth of the top roll (11A 6) to draw line marks (A 6) the glass ribbon It is plotted on the position of the end border neighborhood of 9, the sixth top roll (11A 6), the draw line marks (a 6) than the top roll of the 7th order (11A 7) draw the line marks of (a 7) It is drawn in the position near the edge of the edge of this glass ribbon 9. In this way, line marks A 5 to A 10 are formed intermittently at intervals so as to approach the edges of the edges of the glass ribbon 9 sequentially.

Here, the 5th top roll 11A 5 of an upstream side presses the edge part of the glass ribbon 9, and tensions a pressurized part outward, and the 6th top roll 11A 6 downstream of it. ) Is shown in the area enclosed by the dashed-dotted line in FIG. The first fifth top roll (11A 5) of which is located on the upstream side in the middle region 3, while transformed into a convex shape under the edge of the glass ribbon (9) located in and applying a tensile force to the outer With respect to the position where the sixth top roll 11A 6 on the downstream side exerts a tensile force on the outside with respect to the end of the glass ribbon 9 becomes the outside position of the glass ribbon 9, for example, the upstream side the fifth of the top roll (11A 5), this may ditches to form a deep recess (9A) in a glass ribbon (9), a sixth of the top roll on the downstream side (11A 6) end portion of the glass ribbon (9) of When the tensile force is applied to the outside, the tensile force is applied to the direction in which the recessed portion 9A is stretched and lost, so that the recessed portion 9A can be eliminated or reduced.

In addition, since achieve the same operation and also to the top roll (11A 7 through 11A 10) after that is installed on the downstream side, is disposed in the top roll (11A 5 to 11A 10) shown in the present embodiment, the glass ribbon in the middle region The glass ribbon 9 can be shape | molded, removing the recessed part 9A which is going to generate | occur | produce in the edge part of (9) one by one.

Therefore, compared with the conventional apparatus, even if it is going to manufacture the very thin glass ribbon 9 like 1 mm or less, local deformation | transformation part called a straw does not generate | occur | produce on the width direction edge side of molten glass G.

The molten glass G which has been thinly stretched using the top rolls 11A 1 to 11A 15 is gradually cooled to increase in hardness as it moves from the upstream region to the downstream region of the movement path 8, thereby increasing the hardness. In the downstream region of 8), it becomes the glass ribbon 10 of fixed width and thickness, reaches the exit part 6, and is conveyed to the slow cooling line 7A side of a subsequent process. According to the glass plate manufacturing apparatus 1 of this embodiment, since the local deformation | transformation part is not produced | generated in the glass ribbon 10 conveyed to the slow cooling line 7A with the local deformation | transformation part called a straw conventionally, 7A of slow cooling lines ), There is no fear that the glass ribbon 10 will crack.

In addition, since the cutting line (not shown) is provided in the subsequent process of the slow cooling line 7A, the glass plate of a desired size can be obtained by cutting and folding the glass ribbon 10 after slow cooling to a required size. Since the local deformation | transformation part is not produced | generated in the glass ribbon 10 sent to this cutting line, there exists a possibility that a cutting failure point may arise at the time of cut-and-fold cutting, and contributes to the improvement of productivity.

In addition, when having a large multi-stage barrel head 14, the width of the six-stage structure with respect to a fifth of the top roll (11A 5) from the top roll of the 10th (11A 10), the glass ribbon (9 of the middle region ), Even if the multi-stage barrel head 14 is pressed with a strong force to apply a strong tensile force, the amount of pressure (the amount of deformation of the molten glass G in the thickness direction) of the glass ribbon 9 is 2, It can be made shallower than the case where the reference barrel head 18 of a short structure is used.

For this reason, even if the multi-stage barrel head 14 exerts a strong tensile force in the outward direction with respect to the width direction edge part of the glass ribbon 9 by strong tensile force, the multi-stage barrel head 14 makes the width | variety of the glass ribbon 9 The amount (pressure amount) which deforms a direction end part in the thickness direction becomes small. For this reason, the width | variety of the molten glass G even in the case of trying to manufacture the thin glass ribbon 9 compared with the conventional apparatus which exerted strong tensile force on the outer periphery of the two-stage structure with respect to the glass ribbon 9 in the midstream region. There is no local deformation called a straw on the side of the direction end.

Further, the glass ribbon 9 in the upstream region is low in viscosity, and it is difficult to apply a strong tensile force in the first place, so that the reference barrel head 18 is sufficient, and the glass ribbon 9 in the downstream region is high in viscosity and close to a solid state. Even when pressurized by the reference barrel head 18, the amount of deformation in the thickness direction is small.

For this reason, in this embodiment, although the arrangement relationship of the reference barrel head 18 of the midstream region was made into a special arrangement as shown in FIG. 3, the required number of barrel heads provided in the midstream region is referred to as the multistage barrel head 14. Thus, it is also possible to partially share with the reference barrel head 18 in the arrangement shown in FIG. 3.

In view of this, since the glass ribbon 9 is stretched by applying a strong tensile force to the glass ribbon 9 in the midstream region, after adopting the arrangement of the reference barrel head 18 shown in FIG. 3 in the midstream region, It is also possible to provide the multistage barrel head 14. By setting it as such arrangement structure, local deformation part called a straw can be prevented from occurring more effectively.

In addition, the number which installs the multistage barrel head 14 in a midstream region is not specifically defined in this embodiment, A necessary number can be provided with respect to the glass ribbon 10 of desired final thickness.

In addition, the number of reference barrel heads 18 provided in the entire region from the upstream region to the downstream region is not limited to the example of the present embodiment, but the number necessary for forming the glass ribbon 10 having a desired thickness is provided. do.

The composition of the molten glass G which is going to manufacture in the glass manufacturing apparatus 1 of this embodiment does not have a restriction | limiting in particular.

Therefore, any of alkali free glass, soda-lime glass, mixed alkali type glass, borosilicate glass, or other glass may be sufficient. In addition, the use of the glass goods manufactured is not limited to a flat panel display, a building use, or a vehicle, and other various uses are mentioned. In particular, alkali-free glass for flat panel displays in which high quality is required is preferable.

Moreover, as a glass suitable for molten glass G, the alkali free glass which has the following compositions can be used in the mass percentage display of an oxide reference | standard.

SiO 2 : 50 to 73%, preferably 50 to 66%, Al 2 O 3 : 10.5 to 24%, B 2 O 3 : 0 to 12%, MgO: 0 to 8%, CaO: 0 to 14.5%, SrO : 0 to 24%, BaO: 0 to 13.5%, MgO + CaO + SrO + BaO: 9 to 29.5%, ZrO 2 : 0 to 5%.

As a glass suitable for the molten glass G, when the strain point is high and solubility is considered, an alkali free glass having the following composition can be used in the mass percentage display based on the oxide.

SiO 2 : 58 to 66%, Al 2 O 3 : 15 to 22%, B 2 O 3 : 5 to 12%, MgO: 0 to 8%, CaO: 0 to 9%, SrO: 3 to 12.5%, BaO : 0 to 2%, MgO + CaO + SrO + BaO: 9 to 18%, ZrO 2: 0 to 5%.

As a glass suitable for the molten glass G, in particular, when high strain points are considered, an alkali free glass having the following composition can be used in the mass percentage display based on the oxide.

SiO 2 : 54-73%,

Al 2 O 3 : 10.5-22.5%,

B 2 O 3 : 0 to 5.5%,

MgO: 0 to 8%,

CaO: 0-9%,

SrO: 0-16%,

BaO: 0-2.5%,

MgO + CaO + SrO + BaO: 8 to 26%.

(Example)

FIG. 6 is a graph showing an example related to the temperature and viscosity of an alkali free glass, and in the case of forming a glass ribbon, a viscosity at each temperature when a molten glass of about 1110 ° C to 1120 ° C is formed and the temperature is gradually lowered Indicates a relationship.

As shown in FIG. 6, the commercial number of the viscosity of the upstream area | region and the glass ribbon 9 is 5.29-6.37 in the area before the area | region where the common number of the viscosity ((eta)) of the glass ribbon 9 becomes 5.29 dPa * s. The region where dPa · s can be distinguished from the downstream region can be distinguished from the downstream region where the commercial number of viscosities of the midstream region and the glass ribbon 9 exceeds 6.37 dPa · s. The reference barrel head 18 can be provided, and the multistage barrel head 14 can be provided in the midstream region.

The molten glass of the viscosity characteristic shown in FIG. 6 is applied to the shaping | molding apparatus provided with the 16 reference barrel heads shown in FIG. 1, FIG. 2, and is about 80 inches (about 2.28 m) in width, and about 110 inches (about 3.05 in width). m), a glass ribbon having a thickness of 0.3 mm was prepared.

The width | variety of the following nip area | region was set with respect to the 9th top roll from the 7th top roll.

It is set as the top roll L-0 of the 1st stage, the 1st top roll L-1-the 15th top roll L-15.

About the inclination angle (theta) of each top roll, it inclines at 0 degrees-15 degrees with respect to the barrel head of the top rolls of L-0-L-3, and provides the top to L-4-L-8. Inclination of 12 to 15 ° with respect to the barrel head of the roll, inclination is gradually decreased with respect to the barrel head of the top rolls from L9 to L-13, and incline to 0 ° with respect to the top roll after L-11. Angle conditions were taken.

Width of the nip area of the seventh top roll: 155 mm

Width of the nip area of the eighth top roll: 140 mm

Width of the nip area of the ninth top roll: 120 mm

The glass ribbon with a thickness of 0.3 mm was produced for 24 hours under the above conditions, so that the glass ribbon can be produced without generating a local deformation portion called a straw. The glass ribbon with a thickness of 0.3 mm can be produced by slow cooling and folding the glass ribbon. Could.

For comparison,

Width of the nip area of the seventh top roll: 125 mm

Width of the nip area of the eighth top roll: 140 mm

Width of the nip area of the ninth top roll: 155 mm

As mentioned above, when the width | variety of the nip area | region was made larger by the downstream top roll, and the glass ribbon of thickness 0.3mm was produced, the local deformation part called a straw was produced continuously.

From the above contrast, it turned out that it is effective to make it smaller as the width | variety of the nip area | region of the downstream side with respect to the width | variety of the nip area | region of the some top roll provided in the midstream region.

Fig. 7 shows the stress distribution at the pressing positions of the barrel heads at the ends of the glass ribbons when the reference barrel heads are provided on all the top rolls shown above, and the glass ribbons are formed by the case arrangement of the above-described comparison. It is a figure which shows the result calculated | required by the stress analysis simulation.

As a result of analyzing the state of the stress distribution which acts on the glass ribbon of each position with respect to each top roll of No. 4 (L-4)-No. 11 (L-11) from the result shown in FIG. Regarding the boundary value R indicated by the dashed line, which is expected to occur, a local deformation portion called an assumed straw is a significant stress distribution at positions No. 5 (L-5) to No. 10 (L-10). From the simulation results, it can be seen that it is effective to adjust the nip region with respect to the top roll of the midstream region.

This application is based on the JP Patent application 2012-093883 of an application on April 17, 2012, The content is taken in here as a reference.

The technique of the present invention can be widely applied to an apparatus and a method for producing glass plates used in glass for display devices, optical glass, medical glass, building glass, vehicle glass, and other general glass products.

G: molten glass
1 manufacturing apparatus (float bath)
2: bathtub
3: molten metal
5: entrance
6: outlet
7: conveying roll
7A: slow cooling line
8: movement path
9: glass ribbon
10: glass ribbon
11: top roll
11A 0 to 11A 15 : Top Roll
13: axis of rotation
14: multi-stage barrel head
16: rotating drum
17: axis of rotation
18: reference barrel head
20: rotating drum
30: multistage barrel head
a: width of the nip area

Claims (13)

A molten metal accumulates, a movement path of the molten glass is formed on the molten metal, a float bath for forming the glass ribbon by moving the molten glass from the upstream region to the downstream region of the movement path, and in the float bath A plurality of pairs of top rolls disposed on both sides in the width direction of the movement path from an upstream region to a downstream region of the movement path;
The said top roll is provided in the horizontal direction of the rotary shaft individually extended to the width direction both sides of the movement path | route of the molten glass, and is provided in the front-end | tip part side of the said rotation shaft, and is conveyed to the downstream area | region from the upstream area | region to the downstream region along the said movement path | route. It is provided with the barrel head pressed on the width direction edge part of the glass ribbon used,
The plurality of barrel heads in the midstream region of the travel path, which are pressed by the glass ribbon to exert a tensile force in the outward direction to the widthwise end of the glass ribbon, are immediately adjacent to the pressure position of the barrel head with respect to the glass ribbon and the glass ribbon. The manufacturing apparatus of the glass plate whose width | variety of the nip area | region which shows the distance of the edge of the edge is smaller on the downstream side than the upstream side. The magnitude | size relationship of the width | variety of the width | variety of the nip area | region of the several barrel head provided in this middlestream area | region is made into the middlestream area | region as the area | region whose number of the viscosity of the said glass ribbon is 5.29-6.37 dPa * s. The manufacturing apparatus of the glass plate which meets the relationship small on the downstream side rather than an upstream side. The position of the line mark formed by the barrel head upstream from the said specific barrel head is more than the position of the line mark which the said specific barrel head presses and forms the said glass ribbon, The said glass of Claim 1 or 2 characterized by the above-mentioned. The manufacturing apparatus of the glass plate formed near the inner side of a ribbon. The manufacturing apparatus of the glass plate of Claim 1 or 2 whose thickness of the glass ribbon shape | molded by the said float bath is 1 mm or less. The manufacturing apparatus of the glass plate of Claim 1 or 2 with which the alkali free glass which has the following compositions is applied in the mass percentage display of an oxide reference | standard as said molten glass:
SiO 2 : 50-73%,
Al 2 O 3 : 10.5-24%,
B 2 O 3 : 0-12%,
MgO: 0 to 8%,
CaO: 0-14.5%,
SrO: 0-24%,
BaO: 0-13.5%,
MgO + CaO + SrO + BaO: 9 to 29.5% and
ZrO 2 : 0-5%. The manufacturing apparatus of the glass plate of Claim 1 or 2 with which the alkali free glass which has the following compositions is applied in the mass percentage display of an oxide reference | standard as said molten glass:
SiO 2 : 58-66%,
Al 2 O 3 : 15-22%,
B 2 O 3 : 5-12%,
MgO: 0 to 8%,
CaO: 0-9%,
SrO: 3 to 12.5%,
BaO: 0-2%,
MgO + CaO + SrO + BaO: 9-18% and
ZrO 2 : 0-5%. The manufacturing apparatus of the glass plate of Claim 1 or 2 with which the alkali free glass which has the following compositions is applied in the mass percentage display of an oxide reference | standard as said molten glass:
SiO 2 : 54-73%,
Al 2 O 3 : 10.5-22.5%,
B 2 O 3 : 0 to 5.5%,
MgO: 0 to 8%,
CaO: 0-9%,
SrO: 0-16%,
BaO: 0-2.5% and
MgO + CaO + SrO + BaO: 8 to 26%. In the manufacturing method of the glass plate which shape | molds and moves a molten glass along the movement path of the molten glass provided on the molten metal, and manufactures a glass ribbon,
When a glass ribbon having a thickness of 1 mm or less is produced by applying an outward tensile force to both ends of the glass ribbon by a plurality of pairs of top rolls disposed on both sides of the width direction from the upstream region to the downstream region of the movement route. ,
The said top roll is provided with the barrel head which exerts the tension | pulling force of an outward direction to the width direction edge part of the glass ribbon conveyed from an upstream area | region to a downstream area | region along the said movement path,
The plurality of barrel heads provided in the midstream region of the movement path has a width of the nip region representing the distance between the pressing position of the barrel head with respect to the glass ribbon and the edge of the edge immediately adjacent to the glass ribbon, rather than the upstream side. The manufacturing method of the glass plate which makes small and exerts a tension force to both ends of a glass ribbon. 9. The upper and lower relations of the widths of the nip regions of the plurality of barrel heads provided in the middle-class region, wherein the number of the viscosity of the glass ribbon is 5.29 to 6.37 dPa · s as the middle-class region. The manufacturing method of the glass plate made into the relationship smaller on the downstream side than the side. The position of the line mark formed by the barrel head upstream from the said specific barrel head rather than the position of the line mark which the said specific barrel head presses and forms the said glass ribbon, The said glass of Claim 8 or 9 characterized by the above-mentioned. The manufacturing method of a glass plate formed near the inside of a ribbon. The manufacturing method of the glass plate of Claim 8 or 9 which uses the alkali free glass which has the following compositions in the mass percentage display of an oxide reference | standard as said molten glass:
SiO 2 : 50-73%,
Al 2 O 3 : 10.5-24%,
B 2 O 3 : 0-12%,
MgO: 0 to 8%,
CaO: 0-14.5%,
SrO: 0-24%,
BaO: 0-13.5%,
MgO + CaO + SrO + BaO: 9 to 29.5% and
ZrO 2 : 0-5%. The manufacturing method of the glass plate of Claim 8 or 9 which uses the alkali free glass which has the following compositions in the mass percentage display of an oxide reference | standard as said molten glass:
SiO 2 : 58-66%,
Al 2 O 3 : 15-22%,
B 2 O 3 : 5-12%,
MgO: 0 to 8%,
CaO: 0-9%,
SrO: 3 to 12.5%,
BaO: 0-2%,
MgO + CaO + SrO + BaO: 9-18% and
ZrO 2 : 0-5%. The manufacturing method of the glass plate of Claim 8 or 9 which uses the alkali free glass which has the following compositions in the mass percentage display of an oxide reference | standard as said molten glass:
SiO 2 : 54-73%,
Al 2 O 3 : 10.5-22.5%,
B 2 O 3 : 0 to 5.5%,
MgO: 0 to 8%,
CaO: 0-9%,
SrO: 0-16%,
BaO: 0-2.5% and
MgO + CaO + SrO + BaO: 8 to 26%.
KR1020147029127A 2012-04-17 2013-04-11 Glass plate manufacturing device and manufacturing method KR102045833B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2012093883 2012-04-17
JPJP-P-2012-093883 2012-04-17
PCT/JP2013/060923 WO2013157477A1 (en) 2012-04-17 2013-04-11 Glass plate manufacturing device and manufacturing method

Publications (2)

Publication Number Publication Date
KR20150002678A KR20150002678A (en) 2015-01-07
KR102045833B1 true KR102045833B1 (en) 2019-11-18

Family

ID=49383435

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020147029127A KR102045833B1 (en) 2012-04-17 2013-04-11 Glass plate manufacturing device and manufacturing method

Country Status (5)

Country Link
JP (1) JPWO2013157477A1 (en)
KR (1) KR102045833B1 (en)
CN (1) CN104245605B (en)
TW (1) TW201345848A (en)
WO (1) WO2013157477A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1022595A9 (en) * 2014-11-19 2016-09-28 Fives Stein S A DEVICE FOR HANDLING THE EDGE OF A FLOATING GLASS TAPE, INCLUDING AN INCLINED AXIS WHEEL, AND AN INSTALLATION COMPRISING SUCH A DEVICE
JP2020066548A (en) * 2018-10-24 2020-04-30 Ａｇｃ株式会社 Analysis device, manufacturing apparatus of float glass, analysis method, and manufacturing method of float glass
DE102020104973A1 (en) * 2019-03-04 2020-09-10 Schott Ag Glass substrate for a vehicle window, in particular for the front window of a vehicle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3493359A (en) 1965-03-11 1970-02-03 Pilkington Brothers Ltd Molten bath with roller for drawing a glass sheet thereover

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1393118A (en) * 1971-09-16 1975-05-07 Pilkington Brothers Ltd Manufacture of flat glass
JPS5988326A (en) * 1982-11-10 1984-05-22 Nippon Sheet Glass Co Ltd Top roll for manufacturing plate glass by floating
JP3083586B2 (en) * 1991-04-26 2000-09-04 旭硝子株式会社 Alkali-free glass
JP3572631B2 (en) * 1993-06-25 2004-10-06 旭硝子株式会社 Manufacturing method of float plate glass
JPH08277131A (en) * 1995-04-05 1996-10-22 Asahi Glass Co Ltd Edge roll apparatus for producing float glass
JPH11236231A (en) 1998-02-20 1999-08-31 Asahi Glass Co Ltd Edge roll device for producing float glass
JP4158249B2 (en) * 1998-11-30 2008-10-01 旭硝子株式会社 Method for producing glass for display substrate by float method
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
DE102004052568B4 (en) * 2004-10-29 2012-02-02 Schott Ag Thin glass substrate and method of making thin glass
JP5056035B2 (en) * 2007-02-05 2012-10-24 旭硝子株式会社 Manufacturing method of plate glass by float method
JP2008239370A (en) * 2007-03-26 2008-10-09 Asahi Glass Co Ltd Method for producing plate glass by floating process
KR101285989B1 (en) * 2009-06-19 2013-07-15 아사히 가라스 가부시키가이샤 Top roller, float glass production device, and float glass production method
JP5565062B2 (en) * 2010-04-15 2014-08-06 旭硝子株式会社 Float glass manufacturing apparatus and float glass manufacturing method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3493359A (en) 1965-03-11 1970-02-03 Pilkington Brothers Ltd Molten bath with roller for drawing a glass sheet thereover

Also Published As

Publication number Publication date
JPWO2013157477A1 (en) 2015-12-21
CN104245605B (en) 2016-06-15
KR20150002678A (en) 2015-01-07
WO2013157477A1 (en) 2013-10-24
CN104245605A (en) 2014-12-24
TW201345848A (en) 2013-11-16

Similar Documents

Publication Publication Date Title
CN105492654B (en) Metallic plate, the manufacture method of metallic plate and the method using metallic plate manufacture mask
CN103429541B (en) The manufacture method of glass roll and manufacture device
JP5428288B2 (en) Glass plate manufacturing method and manufacturing equipment
TWI535671B (en) Manufacturing device and method of glass film
EP2189424B1 (en) Method for making glass sheet with low compaction
KR102045833B1 (en) Glass plate manufacturing device and manufacturing method
TWI422539B (en) Manufacturing method and apparatus for glass plate
EP2226299A1 (en) Glass manufacturing system and method for forming a high quality thin glass sheet
KR20120130265A (en) Glass substrate production method
KR102045834B1 (en) Method and device for manufacturing glass plate
JP2009107913A (en) Method for manufacturing float plate glass
JP3572631B2 (en) Manufacturing method of float plate glass
CN113087366B (en) Gas expansion forming method for ultrathin glass
JP5402602B2 (en) Glass plate manufacturing method and apparatus
KR20150002677A (en) Device and method for producing glass sheet and edge-rolling device for producing float glass
JP4520192B2 (en) Method for producing float glass sheet
JP2000016840A (en) Glass substrate for flat panel display and production of display substrate
CN109963817A (en) Glass plate manufacturing method and device for producing glass sheet
WO2022065169A1 (en) Glass substrate, and method for manufacturing glass substrate
JP4048553B2 (en) Manufacturing method of glass substrate for flat panel display
JP2000016825A (en) Production of glass substrate for flat panel display
CN114192867A (en) Shearing method of oriented silicon steel pickling disc shear
CN116060446A (en) High-speed plate passing method and device and strip steel production line
JP2005324206A (en) Method for manufacturing steel strip having deformed cross section
JP2000016823A (en) Production of glass substrate for flat panel display

Legal Events

Date Code Title Description
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant