WO2014050826A1 - ガラスの溶解方法、ガラス基板の製造方法及びガラスの溶解装置 - Google Patents

ガラスの溶解方法、ガラス基板の製造方法及びガラスの溶解装置 Download PDF

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Publication number
WO2014050826A1
WO2014050826A1 PCT/JP2013/075734 JP2013075734W WO2014050826A1 WO 2014050826 A1 WO2014050826 A1 WO 2014050826A1 JP 2013075734 W JP2013075734 W JP 2013075734W WO 2014050826 A1 WO2014050826 A1 WO 2014050826A1
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Prior art keywords
electrode body
electrode
glass
pressing
melting
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PCT/JP2013/075734
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English (en)
French (fr)
Japanese (ja)
Inventor
正恭 松林
英明 染井
Original Assignee
ＡｖａｎＳｔｒａｔｅ株式会社
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Priority to CN201380003757.XA priority Critical patent/CN103917498B/zh
Priority to JP2013553733A priority patent/JP5706544B2/ja
Publication of WO2014050826A1 publication Critical patent/WO2014050826A1/ja

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/18—Stirring devices; Homogenisation
    • C03B5/183—Stirring devices; Homogenisation using thermal means, e.g. for creating convection currents
    • C03B5/185—Electric means
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/02—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating
    • C03B5/027—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating by passing an electric current between electrodes immersed in the glass bath, i.e. by direct resistance heating
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls

Definitions

  • the present invention relates to a glass melting method, a glass substrate manufacturing method, and a glass melting apparatus.
  • a glass raw material put into a melting tank is melted to produce a molten glass.
  • This molten glass is clarified by defoaming or the like, and then formed into a sheet-like glass by a forming apparatus.
  • a glass substrate is obtained by cutting the sheet-like glass with a predetermined length.
  • the glass raw material charged on the liquid surface of the molten glass is melted by a flame such as a burner. Specifically, the glass raw material starts to melt gradually by the heat radiation of the furnace wall heated by a burner or the like or a high-temperature gas phase atmosphere, and then melts in the molten glass below.
  • the molten glass is stored in a melting tank and is energized using a pair of electrodes in contact with the molten glass. By this energization, the molten glass itself generates Joule heat, and this Joule heat heats the molten glass itself.
  • Patent Document 1 It is known to use a heat-resistant material such as platinum, a platinum rhodium alloy, molybdenum, or tin oxide as a material used for an electrode used in a dissolution tank (Patent Document 1).
  • the tip portion in contact with the molten glass is worn away by erosion and becomes shorter with time.
  • a large amount of current flows through the wall of the dissolution tank, and the dissolution tank wall may be eroded. Therefore, when the electrode is eroded and the position of the tip of the electrode is retracted from a predetermined position, it is necessary to push the electrode toward the inside of the dissolution tank so that the tip of the electrode becomes a predetermined position.
  • the electrode is arranged in a through hole provided in the wall of the dissolution tank. If the frictional resistance between the electrode and the through-hole is large when pushing the electrode toward the inside of the dissolution tank, a force is applied to the wall of the dissolution tank, which may damage the wall of the dissolution tank.
  • the present invention can reduce the frictional resistance between the electrode and the through-hole when the electrode is pushed into the through-hole of the melting tank, and can dissolve the glass stably over a long period of time using the melting tank. It aims at providing the melting method of glass, the manufacturing method of a glass substrate, and the melting apparatus of glass.
  • One embodiment of the present invention is a method for melting glass stored in a dissolution tank in which electrodes made of tin oxide are provided in at least a pair of through holes.
  • This glass melting method includes a measurement step of measuring the inclination of the rear end face of the electrode with respect to the central axis of the through hole when the shortened electrode is pushed out by a pressing member in the molten glass direction; and the measurement obtained in the measurement step A determining step of determining a pressing direction of the pressing member based on the result; and a pressing step of pressing the rear end face of the electrode by the pressing member based on the pressing direction obtained in the determining step.
  • the pressing direction is determined in the determining step so as to reduce the inclination of the rear end face.
  • the rear end surface of the electrode is supported in a state where at least a part of the electrode protruding outside the dissolution tank is supported from a direction intersecting the central axis of the through hole. It is preferable to press.
  • Another aspect of the present invention is a method for producing a glass substrate including the glass melting method described above.
  • another aspect of the present invention includes a melting tank in which electrodes made of tin oxide are provided in at least a pair of through holes; a pressing member that pushes the shortened electrode in the direction of molten glass; and a central axis of the through holes Measuring device for measuring the inclination of the rear end face of the electrode with respect to the glass melting device.
  • FIG. 1 is a process diagram illustrating the steps of the glass substrate manufacturing method of the present embodiment.
  • the glass substrate manufacturing method includes a melting step (ST1), a clarification step (ST2), a homogenization step (ST3), a supply step (ST4), a molding step (ST5), and a slow cooling step (ST6). And a cutting step (ST7).
  • a plurality of glass plates that have a grinding process, a polishing process, a cleaning process, an inspection process, a packing process, and the like and are stacked in the packing process are conveyed to a supplier.
  • FIG. 2 is a diagram schematically showing an apparatus for performing the melting step (ST1) to the cutting step (ST7).
  • the apparatus mainly includes a melting apparatus 200, a molding apparatus 300, and a cutting apparatus 400.
  • the dissolution apparatus 200 mainly has a dissolution tank 201, a clarification tank 202, a stirring tank 203, a first pipe 204, and a second pipe 205.
  • the glass raw material supplied into the melting tank 201 is heated and melted with a flame generated from the burner 206 (see FIG. 3), whereby the molten glass MG is made. Thereafter, the molten glass MG is energized and heated using the electrode body 208 (see FIG. 3).
  • the clarification step (ST2) is performed in the clarification tank 202. When the molten glass MG in the clarification tank 202 is heated, bubbles such as O 2 contained in the molten glass MG grow by absorbing oxygen generated by the reductive reaction of the clarifier and float on the liquid surface. And released.
  • the molten glass MG in the stirring vessel 203 supplied through the first pipe 204 is stirred using a stirrer, so that the glass components are homogenized.
  • the molten glass MG in the supplying step (ST4) is supplied to the molding apparatus 300 through the second pipe 205.
  • a molding process (ST5) and a slow cooling process (ST6) are performed.
  • the forming step (ST5) the molten glass MG is formed into a sheet glass, and a flow of the sheet glass is created.
  • an overflow downdraw method is used.
  • the slow cooling step (ST6) the sheet-like glass that is formed and flowed is cooled to have a desired thickness, so that internal distortion does not occur and the thermal shrinkage rate does not increase.
  • the cutting step (ST7) the cutting device 400 cuts the sheet-like glass supplied from the forming device 300 into a predetermined length, thereby obtaining a glass substrate.
  • the cut glass substrate is further cut into a predetermined size to produce a glass substrate of a target size. Thereafter, the glass substrate is ground and polished, and then cleaned. Further, the glass substrate is inspected for abnormal defects such as bubbles and striae, and the glass substrate that has passed the inspection is packed as a final product. .
  • FIG. 3 is a diagram illustrating a melting tank 201 that performs a melting step.
  • the melting tank 201 has a wall 210 made of a refractory member that is a refractory brick.
  • the dissolution tank 201 has an internal space surrounded by a wall 210.
  • the internal space of the melting tank 201 is formed in a liquid tank B that accommodates the molten glass MG formed by melting the glass raw material introduced into the space while being heated, and an upper layer of the molten glass MG.
  • an upper space A which is a gas phase.
  • the wall 210 of the upper space A is provided with a burner 206 that emits a flame by burning combustion gas mixed with fuel and oxygen.
  • the burner 206 heats the refractory member in the upper space A with a flame to raise the temperature of the wall 210.
  • the glass raw material is heated and melted by the radiant heat of the wall 210 which has become high temperature and by the gas phase atmosphere which has become high temperature.
  • the walls 210 and 210 facing the liquid tank B of the dissolution tank 201 are each provided with three through holes 210a.
  • three pairs of electrode bodies 208 made of a heat-resistant conductive material such as tin oxide or molybdenum are arranged in the through hole 210a.
  • the electrode body 208 is made of tin oxide. All of the three pairs of electrode bodies 208 extend from the outside of the dissolution tank 201 toward the inner wall surface of the liquid tank B through the through holes 210a.
  • Each pair of the three pairs of electrode bodies 208 is disposed in the through hole 210a so as to face each other through the molten glass MG.
  • Each pair of electrode bodies 208 serves as a positive electrode and a negative electrode, and allows a current to flow through the molten glass MG between the electrodes. This energization generates Joule heat in the molten glass MG, and the molten glass MG is heated by the Joule heat generated by itself.
  • the molten glass MG is heated to, for example, 1500 ° C. or higher.
  • the heated molten glass MG is sent to the clarification tank 202 through a glass supply pipe.
  • the dissolution tank 201 is provided with three pairs of electrode bodies 208, but may be provided with one pair, two pairs, or four or more pairs of electrode bodies. That is, in this embodiment, the glass stored in the melting tank 201 is melted using the melting tank 201 in which the electrode body 208 is provided in each of at least the pair of through holes 210a and 210a.
  • FIG. 4 is a cross-sectional view parallel to the xz plane in the vicinity of the electrode body 208 and the through hole 210a of the dissolution tank 201.
  • FIG. 5 is a cross-sectional view parallel to the xy plane in the vicinity of the electrode body 208 and the through hole 210a.
  • FIG. 6 is an enlarged front view of the vicinity of the electrode body 208 and the through hole 210a as seen from the x direction. In FIGS. 4 to 6, illustration of connectors and the like provided on the electrode body 208 is omitted.
  • the electrode body 208 is a composite body in which a plurality of long electrode body elements 208a are bundled so as to extend in one direction, and each of the electrode body elements 208a energizes the molten glass MG.
  • the front end surface 208f and the rear end surface 208b of the electrode body 208 are configured to be perpendicular to the central axis C1 of the electrode body 208. 4 to 6, the electrode body element 208a is composed of a total of 16 electrode body elements 208a, with four rows in the vertical direction and four rows in the horizontal direction.
  • the electrode body 208 as a composite body including the electrode body elements 208a is limited to a structure composed of a total of 16 electrode body elements 208a in four rows in the vertical direction and four rows in the horizontal direction as in this embodiment.
  • the total number, the number of columns in the vertical direction, and the number of columns in the horizontal direction are not particularly limited.
  • the electrode body 208 may be composed of one electrode body element 208a.
  • the wall 210 of the melting tank 201 is configured by stacking refractory members that are refractory bricks.
  • the wall 210 is provided with a through hole 210a.
  • the central axis C1 of the through hole 210a and the wall surface of the through hole 210a are provided in parallel with the x axis. That is, the central axis C1 of the through hole 210a and the wall surface of the through hole 210a are provided perpendicular to the wall 210 parallel to the yz plane.
  • the electrode body 208 is inserted and installed in the through hole 210a. That is, the electrode body 208 extends toward the inner wall surface of the liquid tank B, and the refractory member around the electrode body 208 constituting the wall 210, specifically, the lower side, upper side, and It is held by a refractory member on the side. 4 and 5, the central axis C2 of the electrode body 208 coincides with the central axis C1 of the through hole 210a.
  • the position of the front end surface 208f is aligned with the position P0 of the inner wall surface of the liquid tank B (the inner surface of the wall 210). That is, the front end surface 208f of the electrode body 208 and the inner wall surface of the dissolution tank 201 are adjacent to each other without a step. That is, the front end surface 208 f can be arranged on the same plane as the inner wall surface of the liquid tank B.
  • the tip surface 208f of the electrode 208 may be disposed so as to protrude to the inside of the liquid tank B from the through hole 210a to some extent, but the position of the tip surface 208f is matched with the position P0 of the inner wall surface of the liquid tank B.
  • erosion of the electrode body 208 and erosion of the refractory member constituting the wall 210 of the dissolution tank 201 can be reduced.
  • the molten glass MG is energized and heated, so that the tip portion in contact with the molten glass MG is eroded and worn by the molten glass MG, and the position of the tip surface 208f is liquid as shown in FIGS.
  • the tank B moves backward from the position P0 of the inner wall surface of the tank B to the outside of the dissolution tank 201.
  • the front end surface 208f of the electrode body 208 is recessed from the inner wall surface of the liquid tank B to the inside of the through hole 210a, not only the voltage between the opposing electrode bodies 208 and 208 increases, but also the electrode body The wall 210 near 208 is easily eroded. Therefore, a pressing structure 220 for pressing the electrode body 208 in the direction of the molten glass MG is provided outside the melting tank 201.
  • the pressing structure (pressing member) 220 includes a horizontal jig 221 and a vertical jig 222 disposed on the rear end surface 208b of the electrode body 208, a worm jack 223 that applies a pressing force to the vertical jig 222, and a reference plane setting device. 224 and a measurement gauge 225.
  • the horizontal jig 221 is stretched over all the electrode body elements 208a adjacent in the horizontal direction, and is provided in each stage from the uppermost stage to the lowermost stage of the electrode body element 208a. It has been.
  • the vertical jig 222 is stretched over each horizontal jig 221 adjacent in the vertical direction.
  • the worm jack 223 includes a flange portion 223a, a pressing shaft 223b, and a drive portion 223c.
  • the flange portion 223a is provided so as to be fixed at an arbitrary position of a frame-like structure (not shown) provided outside the melting tank 201, and the inclination of the surface facing the electrode body 208 can be adjusted by a bolt or the like. It has become.
  • the pressing shaft 223b is provided perpendicular to the flange portion 223a, and a trapezoidal screw is formed on the outer peripheral surface.
  • the drive unit 223c includes a worm gear having a gear.
  • the gear is formed with a trapezoidal screw on the inner periphery and is screwed to the trapezoidal screw of the pressing shaft 223b.
  • a handle (not shown) is attached to the drive unit 223c and rotated, the gear of the worm gear rotates, and the pressing shaft 223b moves forward and backward in a direction perpendicular to the flange portion 223a by the action of the trapezoidal screw.
  • the worm jack 223 moves the pressing shaft 223b forward in the negative direction of the x-axis with the tip of the pressing shaft 223b in contact with the vertical jig 222, so that the electrode is interposed via the vertical jig 222 and the horizontal jig 221.
  • a pressing force is applied to the rear end surface 208b of the body 208.
  • one worm jack 223 is installed, but the number of installed worm jacks 223 may be two or more.
  • the reference plane setting device 224 can use, for example, a commercially available laser marking device or laser level.
  • the reference plane setting device 224 is configured to set a reference plane or a reference line in the surrounding space by irradiating laser light from the main body 224a along the vertical plane and the horizontal plane.
  • a vertical plane parallel to the wall 210 of the dissolution tank 201 and separated from the wall 210 by a predetermined distance D0 is set as the reference plane R. That is, the reference plane R is set in parallel with the yz plane.
  • the central axis C ⁇ b> 1 of the through hole 210 a provided in the wall 210 of the dissolution tank 201 and the wall surface of the through hole 210 a are provided perpendicular to the wall 210. Therefore, the reference plane R is perpendicular to the central axis C1 of the through hole 210a and the wall surface of the through hole 210a.
  • the measurement gauge (measuring instrument) 225 is a gauge capable of measuring the distance between two points, and measures the distance between an arbitrary point on the rear end surface 208b of the electrode body 208 and the reference plane R.
  • the electrode body 208 is inserted into the through hole 210 a provided in the wall 210 of the liquid tank B of the dissolution tank 201, and the rear end part is inserted into the dissolution tank 201 from the through hole 210 a. It is arranged in a state protruding from the outside. Below the rear end of the electrode body 208, there is provided an electrode support base 230 that supports at least a part of the electrode body 208 protruding outside the dissolution tank 201 from the z direction intersecting the central axis C1 of the through hole 210a. It has been.
  • the electrode support base 230 includes a pedestal part 231, an elevating part 232, an adjusting screw 233, an insulating part 234, and an electrode support part 235.
  • the pedestal portion 231 supports the lifting / lowering portion 232 via the adjustment screw 233.
  • the elevating unit 232 is configured to elevate in the vertical direction (z direction) by the adjusting screw 233.
  • An insulating part 234 made of an insulator is disposed on the elevating part 232.
  • the electrode support part 235 which consists of a refractory brick is arrange
  • the electrode support base 230 supports the electrode body 208 so that the central axis C2 of the electrode body 208 is horizontal by raising and lowering the elevating part 232 with the adjusting screw 233 and setting the electrode support part 235 to an appropriate height. is doing.
  • the glass raw material is supplied into the melting tank 201. Is done.
  • the glass raw material is heated and melted by the flame generated by the burner 206, and the molten glass MG is stored in the liquid tank B.
  • the molten glass MG is energized and heated using the electrode body 208.
  • the tip of the electrode body 208 is eroded by the molten glass MG.
  • the position of the distal end surface 208 f of the electrode body 208 retreats from the initial position P 0 to the inside of the through hole 210 a.
  • the shortened electrode body 208 is used as the molten glass MG in the melting tank 201.
  • a process of extruding in the direction is required.
  • the process of extruding the electrode body 208 in the molten glass MG direction in the melting tank 201 will be described.
  • FIG. 7A and 7B are cross-sectional views parallel to the xz plane, where FIG. 7A is a cross-sectional view showing the periphery of the electrode body 208 before being pushed in, and FIG. 7B is a cross-sectional view showing the periphery of the electrode body 208 after being pushed in.
  • 8A and 8B are cross-sectional views parallel to the xy plane, where FIG. 8A is a cross-sectional view showing the periphery of the electrode body 208 before being pushed in, and FIG. 8B is a cross-sectional view showing the periphery of the electrode body 208 after being pushed in.
  • the electrode support 230 is not shown. As shown in FIG.
  • the electrode body 208 may have its center axis C2 inclined with respect to the center axis C1 of the through hole 210a in the vertical plane. Further, as shown in FIG. 8A, the electrode body 208 may have its central axis C2 inclined with respect to the central axis C1 of the through hole 210a in the horizontal plane.
  • the inclination of the central axis C2 of the electrode body 208 with respect to the central axis C1 of the through hole 210a in the xz plane is defined as the vertical inclination
  • the central axis of the through hole 210a in the xy plane horizontal plane
  • the inclination of the central axis C2 of the electrode body 208 with respect to C1 is defined as the left-right inclination.
  • the central axis C2 of the electrode body 208 is inclined upward with respect to the central axis C1 of the through hole 210a or the x axis.
  • the central axis C2 of the electrode body 208 is inclined downward with respect to the central axis C1 of the through-hole 210a or the x-axis.
  • the central axis C2 of the electrode body 208 is inclined to the right with respect to the central axis C1 of the through hole 210a or the x axis.
  • the central axis C2 of the electrode body 208 when the inclination of the central axis C2 of the electrode body 208 is negative, the central axis C2 of the electrode body 208 is inclined to the left with respect to the central axis C1 or the x axis of the through hole 210a.
  • the factors that cause the central axis C2 of the electrode body 208 to incline with respect to the central axis C1 of the through hole 210a as described above are, for example, thermal expansion of the wall 210 due to the temperature rise of the dissolution tank 201, and the weight of the rear end of the electrode body 208.
  • the electrode body 208 When the electrode body 208 is pushed out in the direction of the molten glass MG without properly determining the pressing direction of the electrode body 208 in a state where the center axis C2 of the electrode body 208 is inclined with respect to the center axis C1 of the through hole 210a, the electrode A large frictional force is generated between the body 208 and the through hole 210a, and a large force is required to push the electrode body 208. If the electrode 208 is pushed into the through-hole 210a in such a state, the wall 210 of the liquid tank B of the dissolution tank 201 may be damaged by receiving a large force.
  • the shortened electrode body 208 when the shortened electrode body 208 is pushed out by the pressing structure 220 in the direction of the molten glass MG in the melting tank 201, the inclination of the rear end surface 208b of the electrode body 208 with respect to the central axis C1 of the through hole 210a is set.
  • the measurement process to measure is implemented.
  • distances in the x direction between the reference plane R and the rear end surface 208b of the electrode body 208 are measured at a plurality of locations in the z direction.
  • the front end of the measurement gauge 225 is brought into contact with the rear end surface 208b of the electrode body 208, and the measurement gauge 225 is kept parallel to the x-axis using a leveler or a reference surface setting device 224.
  • the distance in the x direction between the rear end surface 208b of the electrode body 208 and the reference surface R is read by reading the scale of the measurement gauge 225 irradiated with the laser beam indicating the reference surface R from the reference surface setting device 224. Measure.
  • the slope inside is determined.
  • the measurement of the distance of the x direction between the rear end surface 208b of the electrode body 208 and the reference plane R is performed at three or more places.
  • the rear end surface 208 b of the electrode body 208 is provided perpendicular to the central axis C ⁇ b> 2 of the electrode body 208.
  • the central axis C1 of the through hole 210a is parallel to the x axis.
  • the inclination of the central axis C2 of the electrode body 208 in the xz plane is obtained from the inclination of the rear end surface 208b of the electrode body 208 in the xz plane, and further, the electrode body 208 with respect to the central axis C1 of the through hole 210a in the xz plane.
  • the inclination of the central axis C2 is obtained.
  • the distance in the x direction between the reference plane R and the rear end face 208b of the electrode body 208 is measured at a plurality of points in the y direction.
  • the distance D3 in the x direction between the rear end surface 208b of the electrode body 208 and the reference surface R is obtained by bringing the front end of the measurement gauge 225 into contact with the left end and the right end of the rear end surface 208b of the electrode body 208. , D4 is measured.
  • the rear end surface 208b of the electrode body 208 by the pressing structure (pressing member) 220 is measured.
  • a determination step for determining the pressing direction is performed.
  • the pressing direction is determined so as to reduce the inclination of the rear end surface 208b of the electrode body 208.
  • the pressing position of the rear end surface 208b is determined together with the pressing direction of the rear end surface 208b.
  • the pressing direction of the rear end surface 208b of the electrode body 208 by the pressing structure 220 is determined.
  • the flange portion 223a of the worm jack 223 and the reference surface R The distances d1, d2, d3, and d4 are measured at a plurality of locations in the z direction and the y direction by the measurement gauge 225, and the inclination of the flange portion 223a with respect to the reference plane R is obtained.
  • the distance between the flange part 223a and the reference plane R is measured at three or more places.
  • the inclination of the flange portion 223a is adjusted by an adjustment screw (not shown) so that the flange portion 223a is parallel to the reference plane R.
  • the pressing direction of the rear end surface 208b of the electrode body 208 by the pressing shaft 223b of the worm jack 223 is made parallel to the x-axis. That is, the pressing direction of the rear end surface 208b of the electrode body 208 is parallel to the central axis C1 of the through hole 210a.
  • the pressing position can be determined without determining the pressing direction.
  • the determination of the pressing position can be performed as follows. When the central axis C2 of the electrode body 208 is inclined downward with respect to the central axis C1 of the through hole 210a, the worm jack 223 is moved, and the pressing position of the rear end surface 208b of the electrode body 208 by the pressing shaft 223b is the center. It should be above the axis C2.
  • the worm jack 223 is moved and the pressing position of the rear end surface 208b of the electrode body 208 by the pressing shaft 223b. Is to the right of the center axis C2. That is, the pressing position of the rear end surface 208b of the electrode body 208 by the pressing structure 220 is such that the center axis C2 of the electrode body 208 is inclined with respect to the center axis C1 of the through hole 210a with respect to the center axis C2 of the electrode body 208. Decide on the opposite side of the direction.
  • a pressing step of pressing the rear end surface 208b of the electrode body 208 by the pressing member 220 is performed. Specifically, the rear end surface 208 b of the electrode body 208 is pressed by the pressing shaft 223 b of the worm jack 223 through the horizontal jig 221 and the vertical jig 222.
  • the pressing direction of the rear end surface 208b of the electrode body 208 is parallel to the central axis C1 of the through hole 210a. Therefore, even when the central axis C2 of the electrode body 208 is inclined with respect to the central axis C1 of the through hole 210a, the electrode body 208 is pushed by pushing the electrode body 208 along the central axis C1 of the through hole 210a. The inclination of the central axis C2 can be reduced. Therefore, the frictional resistance between the electrode body 208 and the through hole 210a when the electrode body 208 is pushed into the through hole 210a can be reduced.
  • the pressing position of the pressing member 220 is such that the center axis C2 of the electrode body 208 is inclined with respect to the center axis C1 of the through hole 210a with respect to the center axis C2 of the electrode body 208; It has been decided on the other side. Therefore, when the electrode body 208 is pressed by the pressing structure 220, a rotational force that reduces the inclination of the central axis C2 of the electrode body 208 with respect to the central axis C1 of the through hole 210a of the electrode body 208 acts on the electrode body 208. .
  • the through hole The electrode body 208 can be pushed into the through-hole 210a so that the central axis C1 of 210a and the central axis C2 of the electrode body 208 coincide. Therefore, the frictional resistance between the electrode body 208 and the through-hole 210a is reduced, and the wall 210 of the liquid tank B of the dissolution tank 201 is prevented from being damaged by the pressing of the electrode body 208. Glass can be melted stably over a period of time.
  • the electrode support base 230 is provided to support from the direction to perform. Therefore, when the electrode body 208 is pushed out in the direction of the molten glass MG, the center axis C2 of the electrode body 208 is prevented from being inclined downward with respect to the center axis C1 of the through hole 210a.
  • the height of the electrode support base 230 is adjustable, it is possible to more effectively prevent the electrode body 208 from being tilted by its own weight by appropriately setting the height of the electrode support base 230. .
  • the electrode body 208 and the through hole when the electrode body 208 is pushed into the through hole 208a of the melting tank 201 Friction resistance with 208a can be reduced, and the glass can be stably melted over a long period of time using the melting tank 201.
  • the pressing of the electrode body 208 can be divided into a plurality of times, and the process of measuring the inclination of the rear end face 208b and the process of determining the pressing position or pressing direction of the pressing structure 220 can be repeated. Thereby, the pressing position and the pressing direction by the pressing structure 220 can be finely adjusted while measuring the inclination of the central axis C1 of the electrode body 208 with respect to the central axis C1 of the through hole 210a.
  • the electrode body 208 is directly pushed into the through hole 210a by the pressing structure 220 without changing the pressing direction. But it ’s okay. Moreover, it is also possible to determine only the pressing direction as the optimum direction without changing the pressing position. In this case, the pressing direction is set so as to face the direction opposite to the direction in which the central axis C2 of the electrode body 208 is inclined with respect to the central axis C1 of the through hole 210a in the xz plane and the xy plane.
  • a rotational force that reduces the inclination of the central axis C2 of the electrode body 208 with respect to the central axis C1 of the through hole 210a is applied to the electrode body 208, so that the central axis C2 of the electrode body 208 with respect to the central axis C1 of the through hole 210a
  • the inclination can be reduced.
  • the pressing direction of the rear end surface 208b of the electrode body 208 may not be parallel to the central axis C1 of the through hole 210a as long as the inclination of the rear end surface 208b of the electrode body 208 can be reduced. For example, as shown in FIG.
  • the electrode by the pressing shaft 223b of the worm jack 223 is used.
  • the pressing direction may be determined so that the pressing direction of the rear end surface 208b of the body 208 faces obliquely upward.
  • the pressing direction of the rear end surface 208b of the electrode body 208 by the pressing shaft 223b of the worm jack 223 is The pressing direction may be determined so as to face obliquely downward.
  • the electrode by the pressing shaft 223b of the worm jack 223 is used.
  • the pressing direction may be determined so that the pressing direction of the rear end surface 208b of the body 208 faces diagonally to the left.
  • the pressing direction of the rear end surface 208b of the electrode body 208 by the pressing shaft 223b of the worm jack 223 is The pressing direction may be determined so as to face diagonally right.
  • the pressing structure 220 is configured to press the rear end surface 208b of the electrode body 208 via the horizontal jig 221 and the vertical jig 222.
  • a grid-like jig or a plate-like jig is used. You may press the rear-end surface 208b of the electrode body 208 using the jig
  • the measurement gauge 225 is used as the measuring device.
  • a non-contact type distance sensor such as an optical type may be used as the measuring device.
  • an acceleration sensor may be provided on the rear end surface of the horizontal jig 221 and the gravitational acceleration may be measured using the acceleration sensor to obtain the inclination of the rear end surface of the electrode.
  • the electrode support base 230 is configured to support the electrode body 208 from below.
  • the direction in which the electrode body 208 is indicated is not particularly limited as long as at least a part of the electrode body 208 protruding outside the dissolution tank 201 is supported from the direction intersecting the central axis C1 of the through hole 210a.
  • the rear end portion of the electrode body 208 may be supported by being suspended from above, or may be supported from an oblique direction.
  • the method of the present invention makes it possible to advantageously perform a glass melting step particularly in the production of a glass substrate by molding molten glass.
  • Electrode body (electrode) 208b Rear end face 210a Through hole 220 Press structure (press member) 225 Measuring instrument C1, C2 Center axis MG Molten glass

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
PCT/JP2013/075734 2012-09-28 2013-09-24 ガラスの溶解方法、ガラス基板の製造方法及びガラスの溶解装置 WO2014050826A1 (ja)

Priority Applications (2)

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CN201380003757.XA CN103917498B (zh) 2012-09-28 2013-09-24 玻璃的熔解方法、玻璃基板的制造方法及玻璃的熔解装置
JP2013553733A JP5706544B2 (ja) 2012-09-28 2013-09-24 ガラスの溶解方法、ガラス基板の製造方法及びガラスの溶解装置

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Cited By (1)

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JP7430709B2 (ja) 2018-09-06 2024-02-13 コーニング インコーポレイテッド 溶融炉電極操作装置

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JP6722021B2 (ja) * 2016-03-31 2020-07-15 ＡｖａｎＳｔｒａｔｅ株式会社 ガラス基板の製造方法、およびガラス熔解装置

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JP2003292323A (ja) * 2002-04-01 2003-10-15 Nippon Electric Glass Co Ltd ガラス溶融炉及びガラスの溶融方法
JP2012162422A (ja) * 2011-02-08 2012-08-30 Nippon Electric Glass Co Ltd ガラス物品の製造方法、及びガラス熔融炉
JP2012250906A (ja) * 2011-05-31 2012-12-20 Corning Inc ガラス融液ハンドリング装置及び方法
JP2013082608A (ja) * 2011-09-30 2013-05-09 Avanstrate Inc ガラス板の製造方法

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JP2003292323A (ja) * 2002-04-01 2003-10-15 Nippon Electric Glass Co Ltd ガラス溶融炉及びガラスの溶融方法
JP2012162422A (ja) * 2011-02-08 2012-08-30 Nippon Electric Glass Co Ltd ガラス物品の製造方法、及びガラス熔融炉
JP2012250906A (ja) * 2011-05-31 2012-12-20 Corning Inc ガラス融液ハンドリング装置及び方法
JP2013082608A (ja) * 2011-09-30 2013-05-09 Avanstrate Inc ガラス板の製造方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7430709B2 (ja) 2018-09-06 2024-02-13 コーニング インコーポレイテッド 溶融炉電極操作装置

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CN106007340A (zh) 2016-10-12
JP5941175B2 (ja) 2016-06-29
CN103917498B (zh) 2016-07-06
CN103917498A (zh) 2014-07-09
JPWO2014050826A1 (ja) 2016-08-22
JP2015155369A (ja) 2015-08-27
JP5706544B2 (ja) 2015-04-22

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