WO2012157439A1 - ガラスリボンの搬送ロールの欠陥特定方法およびガラスリボン搬送装置 - Google Patents
ガラスリボンの搬送ロールの欠陥特定方法およびガラスリボン搬送装置 Download PDFInfo
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- WO2012157439A1 WO2012157439A1 PCT/JP2012/061460 JP2012061460W WO2012157439A1 WO 2012157439 A1 WO2012157439 A1 WO 2012157439A1 JP 2012061460 W JP2012061460 W JP 2012061460W WO 2012157439 A1 WO2012157439 A1 WO 2012157439A1
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- WIPO (PCT)
- Prior art keywords
- glass ribbon
- roll
- transport
- transport roll
- glass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
- C03B35/18—Construction of the conveyor rollers ; Materials, coatings or coverings thereof
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
- C03B18/02—Forming sheets
- C03B18/04—Changing or regulating the dimensions of the molten glass ribbon
- C03B18/06—Changing or regulating the dimensions of the molten glass ribbon using mechanical means, e.g. restrictor bars, edge rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path
- F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path being carried by a conveyor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
- G01N21/896—Optical defects in or on transparent materials, e.g. distortion, surface flaws in conveyed flat sheet or rod
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- 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
Definitions
- the present invention relates to an improvement in a method for identifying defects in a transport roll that causes surface defects on a glass plate by a transport roll that transports a glass ribbon in a glass plate production line, a glass ribbon transport device, a method for manufacturing a plate glass, and an operation method for producing plate glass.
- a float plate glass manufacturing method (hereinafter also simply referred to as “float method”) is widely used as a method for manufacturing glass plates for buildings, glass plates for automobiles, and glass plates for displays.
- float method a float plate glass manufacturing method
- the glass raw material is melted in a glass melting furnace, clarified in a clarification tank, and the clarified molten glass is continuously formed on the surface of the molten tin layer of a molten tin bath called a float bath in which molten tin is stored.
- the glass ribbon After being floated along the surface of the molten tin layer of the float bath, the glass ribbon is formed into a glass ribbon having a predetermined thickness and width, and the glass ribbon is pulled out laterally from the float bath, and then subjected to desired slow cooling conditions. It is gradually cooled while being continuously conveyed in a controlled slow cooling furnace, further cooled to a temperature at which cutting is possible, and then cut into a predetermined size to form a glass plate.
- the glass ribbon is drawn out from the surface of the molten tin bath of the float bath by a roll called a lift-out roll.
- the glass ribbon pull-out area by the lift-out roll is called a lift-out area.
- the lower surface of the glass ribbon drawn out from the molten tin bath is liable to adhere to the molten tin.
- the molten tin adhering to the lower surface of the glass ribbon adheres to the surface of the lift-out roll, it adheres to the glass ribbon that is continuously drawn out thereafter.
- the molten tin to be adhered further adheres to the surface of the lift-out roll, and the adhered molten tin and its reaction product are deposited on the surface of the lift-out roll.
- a removal member for removing the molten tin adhering to the surface of the lift-out roll is provided near the lower part of the lift-out roll, and the removal member is lifted out.
- the molten tin is also removed by pressing against the surface of a roll (Patent Document 1).
- Patent Document 1 a removal member for removing the molten tin adhering to the surface of the lift-out roll is provided near the lower part of the lift-out roll, and the removal member is lifted out.
- the molten tin is also removed by pressing against the surface of a roll (Patent Document 1).
- Patent Document 1 Patent Document 1
- the removal member described above cannot completely remove the molten tin on the surface of the lift-out roll, and foreign matters such as molten tin adhering to the surface of the lift-out roll and its reaction product are subsequently drawn out. It may be transferred to the lower surface of the coming glass ribbon and cause defects on the lower surface of the glass ribbon.
- the glass ribbon is transported from the lift-out region to the slow cooling furnace downstream thereof by a transport roll.
- Deposits such as molten tin remaining on the lower surface of the glass ribbon and its reaction product are transferred to the transport roll.
- Deposits accumulate on the transport roll due to repeated transfer, and if the deposit exceeds a certain level, the transport roll deposit is further transferred to the glass ribbon that flows later, or undesirably deforms on the surface of the glass ribbon. Then, this transferred material and deformation may become a defect on the lower surface of the glass ribbon.
- the glass ribbon is placed on the lift-out roll and the transport roll in the slow cooling process where deposits such as molten tin and its reaction products, flaws, defects, and damage have occurred on the surface.
- deposits such as molten tin and its reaction products, flaws, defects, and damage have occurred on the surface.
- it is conveyed, it is transferred and adhered to the lower surface of the subsequent glass ribbon, resulting in defects such as wrinkles, deposits, and altered parts of the glass ribbon, resulting in defective products, yield, and quality degradation.
- a defect occurs on the lower surface of such a glass ribbon, it is necessary to quickly analyze and analyze the cause of the occurrence and take measures against the occurrence of the defect.
- the deposit on the periphery of the defect is analyzed, and if the ceramic component that covers the roll is detected based on the analysis result, the defect can be lifted roll or transport roll. It can be estimated that it is caused by
- the conveyance rolls are separated from the conveyance path of the slow cooling furnace one by one sequentially, or taken out of the slow cooling furnace, and in this state, the work of observing wrinkles, deposits and damage on the surface of the conveyance roll is continued. Had to be done. And when a flaw, a deposit
- the defect identification work for the defective transport roll requires a long time because the number of transport rolls is very large. For this reason, if the specification of the defective transport roll is delayed, production of defective glass sheet products continues to be performed, and the yield decreases. For this reason, there has been a strong demand for a method that can efficiently identify a defective transport roll in a short time.
- the present invention is to facilitate the identification of defects in a defective conveyance roll that causes a defect on the lower surface of the glass ribbon among a large number of conveyance rolls installed in the slow cooling furnace from the lift-out region in the conveyance line of the glass ribbon. Objective.
- the present invention has been obtained as a result of intensive studies to solve the above-mentioned object, and is a method for identifying a defect in a glass ribbon transport roll having the following configuration, a glass ribbon transport device, a method for manufacturing plate glass, and plate glass production.
- the composition of the material of the surface part which contacts at least the glass ribbon of the transport roll is made different and the defect due to the deposit occurs on the contact surface with the transport roll of the glass ribbon, the composition of the deposit adhered to the glass ribbon is analyzed.
- a method for identifying a defect in a transport roll of a glass ribbon that identifies a defective transport roll group that has caused a defect by comparing the analysis result with the composition of each transport roll group.
- the coating film is formed on the surface of the transport roll, and the detection component is contained in the coating film of the transport roll of the transport roll group in the predetermined area, and the composition analysis of the detection component.
- the coating film contains a base material and a detection component
- the base material is composed of at least one selected from the group consisting of silica, alumina, titania, zirconia, and a rare earth oxide
- the detection component comprises at least one selected from the group of alkaline earth metal oxides, alumina, iron oxide, nickel oxide, titania, zinc oxide and rare earth oxide, and the content of the detection component is a predetermined transport roll group
- the present invention provides the method for identifying a defect in a transport roll of a glass ribbon according to (3), wherein the rare earth oxide in the base material is at least one selected from the group consisting of yttria, ceria, and lanthania. provide.
- the content of the detection component is changed for each conveyance roll group within a range of 1% to 20% (mass percentage) with respect to the base material (1) to (4).
- the defect identification method of the conveyance roll of the glass ribbon in any one of is provided.
- each conveyance roll of the defective conveyance roll group is inspected, Provided is a method for specifying a defect in a transport roll of a glass ribbon that specifies a transport roll.
- the present invention provides a glass ribbon transport apparatus provided with a plurality of transport rolls for transporting a glass ribbon, and has a plurality of transport roll groups divided in a predetermined area among the plurality of transport rolls. And the glass ribbon conveying apparatus which made the composition of the material of the surface part which contact
- a coating film is formed on the surface of the transport roll, and a detection component is contained in each of the transport roll coating films of the transport roll group divided in a predetermined region.
- the coating film contains a base material and a detection component
- the base material consists of at least one selected from the group consisting of silica, alumina, titania, zirconia, and rare earth oxides
- the detection component comprises at least one selected from the group consisting of alkaline earth metal oxides, alumina, iron oxide, nickel oxide, titania, zinc oxide and rare earth oxide, and the content of the detection component is a predetermined value of the transport roll group.
- the glass ribbon transport device according to (8) which is different for each transport roll, and can identify a transport roll group based on the analysis result of the amount of the detected component.
- this invention provides the glass ribbon conveying apparatus as described in (9) whose rare earth oxide in the said base material is at least 1 type chosen from the group which consists of a yttria, a ceria, and a lanthania.
- the content of the detection component is changed for each conveyance roll group in the range of 1% to 20% (mass percentage) with respect to the base material (7) to (10).
- a glass ribbon transport device according to any one of the above.
- the glass ribbon is gradually cooled while being transported in a slow cooling furnace controlled under slow cooling conditions by a transport roll.
- a glass sheet manufacturing method in which the glass ribbon is cooled to a temperature that can be cut and cut into a predetermined size, and when the inside of the slow cooling furnace is continuously transported, any of the above (1) to (6)
- the manufacturing method of the plate glass which specifies the defect of the conveyance roll of a glass ribbon by the defect identification method of the conveyance roll of the described glass ribbon is provided.
- Molten glass is continuously supplied onto the molten metal layer surface of the float bath where the molten metal is stored, and moved while floating along the molten metal layer surface of the float bath to form a glass ribbon having a predetermined thickness and width.
- the transported glass ribbon is gradually cooled while being continuously transported in a slow cooling furnace controlled under slow cooling conditions by the transport roll, and can be cut.
- An operation method for producing a glass sheet of a float method in which the glass ribbon is cooled to a temperature and then cut into a predetermined size, and the method for identifying a defect in a transport roll of the glass ribbon according to any one of (1) to (6) above The operation method of the plate glass by the float method which specifies the defect of the conveyance roll of a glass ribbon is provided.
- a glass plate piece of the defective part is collected, and the defective part is analyzed. It is possible to determine whether or not the defect is caused by the transport roll group, and it is possible to speed up the work for identifying the defective transport roll with the defect, and to improve the production yield of high-quality glass sheets. .
- FIG. 1 is a schematic view of a production line for a float glass sheet according to an embodiment of the present invention.
- FIG. 2 is an explanatory diagram for explaining a defect identification method for a glass ribbon transport roll in a glass plate production line according to one embodiment of the present invention.
- FIG. 3 is a flowchart of a glass ribbon transport roll defect identification method according to one embodiment of the present invention.
- molten glass is a molten metal (specifically, molten tin or molten tin alloy, which is stored in the float bath 3 after passing through the clarification tank 2, and hereinafter referred to as molten tin including molten tin and molten tin alloy in the present specification. .) Effluent to the surface of the layer.
- molten metal specifically, molten tin or molten tin alloy, which is stored in the float bath 3 after passing through the clarification tank 2, and hereinafter referred to as molten tin including molten tin and molten tin alloy in the present specification. .
- the molten glass poured out to the float bath 3 is moved to the glass ribbon 4 having a predetermined width and thickness while moving on the surface of the molten metal layer from the upstream side of the higher temperature float bath toward the lower temperature downstream side. It is molded, pulled out from the outlet of the float bath 3 by a lift-out roll, passes through the lift-out region, is transported to the slow cooling furnace 5 by a transport roll, and the slow cooling temperature region is strictly controlled while being transported in the slow cooling furnace 5.
- the glass ribbon 4 that has been slowly cooled and slowly cooled under the slow cooling conditions is drawn out of the slow cooling furnace 5 and then cut into a predetermined size at a cutting stage of the next glass ribbon to become a float glass sheet.
- the glass ribbon 11 formed to have a predetermined width and thickness in the float bath 10 is formed from the surface of the molten tin 12 of the float bath 10.
- the glass ribbon 11 pulled out in the horizontal direction by a transport roll called a lift-out roll 13 passes through the lift-out region 14 and is transported in the slow cooling furnace 15 by the transport roll 16 in the horizontal direction (A direction).
- the glass ribbon is gradually cooled at a predetermined controlled slow cooling rate and pulled out from the slow cooling furnace 15, and then the defect inspection device 19 inspects the presence or absence of the defects of the glass ribbon, marks them, and further cuts the glass ribbon.
- the upstream side of the slow cooling furnace 15 (upstream side in the direction of arrow A; the left side in the figure) is a slow cooling zone in which the temperature of the glass ribbon is precisely controlled so that the temperature of the slow cooling region is a predetermined slow cooling condition.
- the downstream side of the slow cooling furnace 15 (the downstream side in the direction of arrow A; the right side in the figure) is a slow cooling zone for further cooling the slowly cooled glass ribbon.
- the float plate glass production line usually has about 3 to 5 lift-out rolls, a transport roll in the lift-out area, and about 40 to 150 transport rolls in a slow cooling furnace. Yes.
- the lift roll 13, the transport roll (not shown) between the lift-out region and the slow cooling furnace, and the transport roll 16 in the slow cooling furnace 15 are referred to as a transport roll.
- the coating film component of the lift-out roll may adhere to the lower surface of the glass ribbon and cause a defect. Usually, such deposits and coating film components are partially generated on the surface of the lift-out roll.
- the surface of the lift-out roll is made of molten tin entrained on the lower surface of the glass ribbon. The remaining molten tin and its reaction products, and the coating film components of the lift-out roll and the transport roll adhere to the surface of the downstream transport roll and deposit to a certain thickness to form a glass ribbon.
- the bottom surface of the glass ribbon is wrinkled or transferred to the bottom surface of the glass ribbon as a deposit, which becomes a defect of the bottom surface of the glass ribbon.
- attachment and coating film component which have a fault on the lower surface of a glass ribbon adhered, or the conveyance roll with a wrinkle is called a defect conveyance roll.
- the composition of the materials in the conveyance line of the glass ribbon which has the conveyance roll group which conveys the glass ribbon in which many conveyance rolls were installed, in the surface part which touches the glass ribbon of a conveyance roll for every predetermined area among conveyance roll groups
- the composition of the material of the surface portion of the transport roll is different. Since most of the deposits generated by the defective transport roll on the lower surface of the glass ribbon are accompanied by components on the surface of the transport roll, the deposit on the lower surface of the glass ribbon is analyzed and transported in advance.
- the analysis results cause the defect by which conveyance roll group. Can be determined and identified.
- FIG. 2 A specific example of the present invention will be described with reference to FIG. 2 according to the flowchart of the defect identification method for the transport roll of the glass ribbon of the present invention shown in FIG.
- the glass ribbon 11 carried out from the slow cooling furnace 15 is inspected for defects of the glass ribbon by the defect inspection device 19 or by visual inspection by a person.
- the marking is performed, and the next glass ribbon cutting device 20 is transported to the cutting process in which it is installed.
- the glass ribbon 11 is cut into a glass plate having a predetermined size and provided as a glass plate product.
- the glass plate piece including the defective portion of the glass plate removed from the product of the glass plate is separately collected, and the cause of the defective portion is caused by the situation of the defective matter such as deposits and altered portions. It is used for analysis to investigate.
- a component of the material of the transport roll is detected by the composition analysis of the defect portion, it is determined that the defect is caused by the transport roll.
- the conveyance roll A group, B group, C group, and D group the conveyance in which the defect is considered by the composition analysis result of the defect.
- a roll group is specified.
- heat resistance As the transport roll, heat resistance, thermal shock resistance, which can sufficiently withstand the transport of the glass ribbon of 600 ° C to 900 ° C derived from the molten tin bath, and the transport of the glass ribbon of 500 ° C to 800 ° C near the inlet of the slow cooling furnace, It is selected from those made of materials having high temperature tin resistance, durability, and hardness.
- a transport roll in which the surface of a heat-resistant alloy steel roll is coated with ceramics based on at least one oxide selected from the group consisting of silica, alumina, titania, zirconia, yttria, ceria, and lanthanum.
- the coating film is preferably stabilized zirconia, alumina, or silica in which yttrium oxide (yttria) is dissolved in zirconia (ZrO 2 ).
- yttrium oxide yttria
- ZrO 2 zirconia
- the yttrium component in yttria-stabilized zirconia, can be analyzed as a detection component. it can.
- the content of yttrium oxide as the yttrium component is such that a coating film having a thickness of 100 ⁇ m to 1000 ⁇ m is formed on the surface of a heat-resistant alloy roll (for example, heat-resistant stainless steel) by spraying zirconia and yttrium oxide (particularly plasma spraying).
- a heat-resistant alloy roll for example, heat-resistant stainless steel
- the content of yttrium oxide is adjusted within a range of about 1 to 20% by mass (hereinafter simply referred to as% means mass%). can do.
- the transport roll group A for example, 3% as yttrium oxide
- the B group for example, 5% as yttrium oxide
- the C group for example, to the extent that the content of yttrium oxide in each transport roll group can be identified by analysis.
- D group for example, 9% as yttrium oxide.
- Each transport roll has defects such as deposits, and if the composition analysis of the deposits is carried out, there is a difference in the content thereof. Can be identified.
- the method may be a method of gradually decreasing the amount of yttrium oxide, and the yttrium oxide amount of each transport roll group may be reduced. You may change the quantity in the range which can be identified suitably.
- the content of yttrium oxide described above is 1 to 20% is the ratio of yttrium oxide as an yttrium component to yttria-stabilized zirconia coated on the surface of a roll made of a heat resistant alloy, and the balance is zirconia.
- each of the transport rolls in the group is visually or, if it is difficult to distinguish visually, remove the transport roll from the transport path and perform defect analysis. Then, the presence or absence of deposits, deformed parts, or altered parts on the surface of the transport roll is checked, the defective transport roll is specified, and this defective transport roll is replaced with a non-defective transport roll.
- a large number of transport rolls are divided into several transport roll groups having different compositions, and in identifying the faulty transport roll, the transport roll group including the faulty transport roll in question is first identified. Then, because it is a method to identify the defective transport roll in the procedure of identifying the defective transport roll from the specified transport roll group, compared to the case where many transport rolls are individually checked for defects.
- the transport roll can be identified quickly and easily.
- a zirconia-coated transport roll in which yttrium oxide having improved high-temperature tin resistance, corrosion resistance and the like is preferably used as a transport roll, particularly in a float plate glass manufacturing process, and yttrium oxide.
- the method of identifying the transport roll group by detecting the yttrium oxide content is described, but the detection substance and detection element for determining the difference of the transport roll group by detection are not limited to the yttrium component. Other components may be used.
- examples of the detection component include alkaline earth metal oxides such as calcia and magnesia, silica, nickel oxide, titania, iron oxide, and zinc oxide.
- examples of the detection component include alkaline earth metal oxides such as calcia and magnesia, alumina, titania, iron oxide, and zinc oxide.
- magnesia can be used as a detection component
- calcia can be used as a detection component
- the glass ribbon is shown as an example of being divided into four transport roll groups A to D among a large number of transport rolls to be transported. It is not limited to these.
- it is divided into a transport roll in a region in contact with the high-temperature glass ribbon, for example, a lift-out roll group, a transport roll group near the inlet of the slow cooling furnace adjacent to the lift-out roll group (a transport roll group on the most upstream side in the slow cooling furnace), What is necessary is just to enable it to detect the composition of the surface of these conveyance roll groups by analysis.
- each transport roll group shown in FIG. 2 is 3 in the transport roll group A, 3 in the transport roll group B, 6 in the transport roll group C, and 6 in the transport roll group D.
- the number of each transport roll group is not limited to these and may be any number.
- a single roll may be used depending on the transport roll group, and a predetermined number may be adopted according to the temperature range of the transport roll.
- the amount of the detection component of the transport roll group disposed in the region where the temperature of the glass ribbon itself flowing in the slow cooling furnace is higher than at least 500 ° C. may be changed from the lift-out roll.
- a transport roll group A of lift-out rolls (about 3 to 5), a transport roll group B of transport rolls after the lift-out roll (about 3 to 50), and a transport roll group C after that You may make it change into one conveyance roll group and change content of the detection component of the at least surface part of a conveyance roll for every conveyance roll group A, B, and C.
- the amount of the detected component for each of the transport rolls arranged in the region where the temperature of the glass ribbon itself flowing in the slow cooling furnace is at least higher than 500 ° C. may be changed from the lift-out roll.
- the composition analysis of the detection component of the transport roll is performed by, for example, a fluorescent X-ray analyzer (energy dispersion type, wavelength dispersion type), X-ray photoelectron analyzer, secondary ion mass spectrometer, Auger electron spectrometer, etc. Can be done by.
- a fluorescent X-ray analyzer energy dispersion type, wavelength dispersion type
- X-ray photoelectron analyzer X-ray photoelectron analyzer
- secondary ion mass spectrometer Auger electron spectrometer, etc.
- the glass ribbon conveying apparatus of the present invention is used in a plate glass production line by a float process in a lift-out region and a region in which the inside of a slow cooling furnace is laterally conveyed with a glass ribbon immediately after being drawn from a float bath.
- each transport roll of the glass ribbon transport apparatus is installed on the gantry on both sides for each transport roll, with the rotary shafts at both ends of the transport roll supported rotatably by bearings.
- a worm gear is mounted.
- the worm gear is meshed with a driving force transmission worm provided on the driving shaft, and is driven to rotate through the driving force transmission worm by rotating the driving shaft with a driving motor.
- a conveyance roll rotates and it conveys a glass ribbon at the predetermined
- the example which applied the specific method of the malfunction conveyance roll of the conveyance roll of the glass ribbon of this invention with respect to the float sheet glass manufacturing method was demonstrated, of the malfunction conveyance roll of the conveyance roll of the glass ribbon of this invention
- the specific method is a glass plate conveying line in which a number of conveying rolls for conveying glass ribbons in other plate glass manufacturing methods, for example, a plate glass manufacturing method by a roll-out method, a plate glass manufacturing method by a fusion method, and other plate glass manufacturing methods are installed. The same applies to.
- the glass plate piece of the defective part when it occurs on the lower surface of the glass ribbon, the glass plate piece of the defective part is taken out, the defective part is analyzed, and whether or not the result is caused by the transport roll can be determined, Furthermore, since there are differences in the composition of the material on the contact surface with the glass ribbon of the conveyance roll for each predetermined conveyance roll area among the multiple conveyance rolls, the disadvantages can be reduced by comparing the composition differences.
- the transport roll area can be identified, the identification work of defective transport rolls with defects can be accelerated, the production yield of high quality glass sheets can be improved, and the transport roll transports the glass ribbon. It can be effectively applied to various types of glass plate production lines.
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Abstract
Description
(1)ガラスリボンを搬送する多数本の搬送ロールが設置されたガラス板搬送ラインにおいて、多数本の搬送ロールのうち所定領域において複数の搬送ロール群に区分けし、区分けされた搬送ロール群ごとに搬送ロールの少なくともガラスリボンと接する表面部分の材料の組成を異ならしめ、ガラスリボンの搬送ロールとの接触面に付着物による欠点が生じた場合、ガラスリボンに付着した付着物の組成を分析し、その分析結果と搬送ロール群ごとの組成との対比により欠点を生じさせた不具合搬送ロール群を特定するガラスリボンの搬送ロールの欠陥特定方法を提供する。
(2)また、本発明は、搬送ロールの表面に被覆膜が形成され、所定領域の搬送ロール群の搬送ロールの被覆膜に夫々検知成分が含有されており、当該検知成分の組成分析結果の差異により不具合搬送ロール群を特定する上記(1)に記載のガラスリボンの搬送ロールの欠陥特定方法を提供する。
(3)また、本発明は、前記被覆膜が母材と検知成分を含有しており、母材はシリカ、アルミナ、チタニア、ジルコニアおよび希土類酸化物からなる群より選ばれる少なくとも一種からなり、前記検知成分は、アルカリ土類金属酸化物、アルミナ、酸化鉄、酸化ニッケル、チタニア、酸化亜鉛および希土類酸化物の群から選ばれる少なくとも一種からなり、前記検知成分の含有量が所定の搬送ロール群ごとに異ならしめてあり、前記検知成分の量の分析結果により不具合搬送ロール群を特定する(1)または(2)に記載のガラスリボンの搬送ロールの欠陥特定方法を提供する。
(4)また、本発明は、前記母材中の希土類酸化物が、イットリア、セリアおよびランタニアからなる群より選ばれる少なくとも一種である(3)に記載のガラスリボンの搬送ロールの欠陥特定方法を提供する。
(5)また、本発明は、前記検知成分の含有量が前記母材に対し、1%~20%(質量百分率)の範囲で搬送ロール群ごとに変化されている(1)~(4)のいずれかに記載のガラスリボンの搬送ロールの欠陥特定方法を提供する。
(6)上記(1)~(5)のいずれかに記載のガラスリボンの搬送ロールの欠陥特定方法より不具合搬送ロール群を特定した後、当該不具合搬送ロール群の各搬送ロールを検査し、不具合搬送ロールを特定するガラスリボンの搬送ロールの欠陥特定方法を提供する。
(7)また、本発明は、ガラスリボンを搬送する多数本の搬送ロールが設置されたガラスリボン搬送装置において、前記多数本の搬送ロールのうち所定領域において区分けされた複数の搬送ロール群を有し、区分けされた搬送ロール群ごとに搬送ロールの少なくともガラスリボンと接する表面部分の材料の組成を異ならしめてあるガラスリボン搬送装置を提供する。
(8)また、本発明は、前記搬送ロールの表面に被覆膜が形成され、所定領域において区分けされた搬送ロール群の搬送ロールの被覆膜に夫々検知成分が含有されており、当該検知成分の組成分析結果の差異により搬送ロール群を特定できるようにされた(7)に記載のガラスリボン搬送装置を提供する。
(9)また、本発明は、前記被覆膜が母材と検知成分を含有しており、母材はシリカ、アルミナ、チタニア、ジルコニアおよび希土類酸化物からなる群より選ばれる少なくとも一種からなり、前記検知成分は、アルカリ土類金属酸化物、アルミナ、酸化鉄、酸化ニッケル、チタニア、酸化亜鉛および希土類酸化物の群から選ばれる少なくとも一種からなり、前記検知成分の含有量が搬送ロール群の所定の搬送ロールごとに異ならしめてあり、前記検知成分の量の分析結果により搬送ロール群を特定できるようにされた(8)に記載のガラスリボン搬送装置を提供する。
(10)また、本発明は、前記母材中の希土類酸化物が、イットリア、セリアおよびランタニアからなる群より選ばれる少なくとも一種である(9)に記載のガラスリボン搬送装置を提供する。
(11)また、本発明は、前記検知成分の含有量が前記母材に対し、1%~20%(質量百分率)の範囲で搬送ロール群ごとに変化されている(7)~(10)のいずれかに記載のガラスリボン搬送装置を提供する。
(12)また、本発明は、溶融ガラスを所定厚さと所定幅のガラスリボンに成形した後、このガラスリボンを搬送ロールにより徐冷条件に制御された徐冷炉内を連続的に搬送しながら徐冷し、切断可能な温度まで冷却し、所定のサイズにガラスリボンを切断する板ガラスの製造方法であって、前記徐冷炉内を連続的搬送する際に、上記(1)~(6)のいずれかに記載のガラスリボンの搬送ロールの欠陥特定方法によってガラスリボンの搬送ロールの欠陥を特定する板ガラスの製造方法を提供する。
(13)溶融ガラスを溶融金属が貯溜されたフロートバスの溶融金属層面上に連続的に供給し、フロートバスの溶融金属層面に沿って浮かしながら移動させて所定厚さと所定幅のガラスリボンに成形し、成形されたガラスリボンをフロートバスから引き出し搬送ロールにより搬送した後、搬送されたガラスリボンを搬送ロールにより徐冷条件に制御された徐冷炉内を連続的搬送しながら徐冷し、切断可能な温度まで冷却し、次いで所定のサイズにガラスリボンを切断するフロート法の板ガラス生産の操業方法であって、上記(1)~(6)のいずれかに記載のガラスリボンの搬送ロールの欠陥特定方法によってガラスリボンの搬送ロールの欠陥を特定するフロート法による板ガラスの操業方法を提供する。
本出願は、2011年5月16日出願の日本特許出願2011-109418に基づくものであり、その内容はここに参照として取り込まれる。
2:清澄槽
3、10:フロートバス
4、11:ガラスリボン
5、15:徐冷炉
12:溶融錫
13:リフトアウトロール
14:リフトアウト領域
16:搬送ロール
17:ドロスボックス
18:除去部材
19:欠点検査装置
20:切断装置
Claims (13)
- ガラスリボンを搬送する多数本の搬送ロールが設置されたガラス板搬送ラインにおいて、多数本の搬送ロールのうち所定領域において複数の搬送ロール群に区分けし、区分けされた搬送ロール群ごとに搬送ロールの少なくともガラスリボンと接する表面部分の材料の組成を異ならしめ、
ガラスリボンの搬送ロールとの接触面に付着物による欠点が生じた場合、ガラスリボンに付着した付着物の組成を分析し、その分析結果と搬送ロール群ごとの組成との対比により欠点を生じさせた不具合搬送ロール群を特定するガラスリボンの搬送ロールの欠陥特定方法。 - 搬送ロールの表面に被覆膜が形成され、所定領域の搬送ロール群の搬送ロールの被覆膜に夫々検知成分が含有されており、当該検知成分の組成分析結果の差異により不具合搬送ロール群を特定する請求項1に記載のガラスリボンの搬送ロールの欠陥特定方法。
- 前記被覆膜が、母材と検知成分を含有しており、前記母材は、シリカ、アルミナ、チタニア、ジルコニアおよび希土類酸化物からなる群より選ばれる少なくとも一種からなり、
前記検知成分は、アルカリ土類金属酸化物、アルミナ、酸化鉄、酸化ニッケル、チタニア、酸化亜鉛および希土類酸化物の群から選ばれる少なくとも一種からなり、
前記検知成分の含有量が搬送ロール群の所定の搬送ロールごとに異ならしめてあり、前記検知成分の量の分析結果により不具合搬送ロール群を特定する請求項1または2に記載のガラスリボンの搬送ロールの欠陥特定方法。 - 前記母材中の希土類酸化物は、イットリア、セリアおよびランタニアからなる群より選ばれる少なくとも一種である請求項3に記載のガラスリボンの搬送ロールの欠陥特定方法。
- 前記検知成分の含有量が前記母材に対し、1%~20%(質量百分率)の範囲で搬送ロール群ごとに変化している請求項1~4のいずれか1項に記載のガラスリボンの搬送ロールの欠陥特定方法。
- 請求項1~5のいずれか1項に記載のガラスリボンの搬送ロールの欠陥特定方法により不具合搬送ロール群を特定した後、当該不具合搬送ロール群の各搬送ロールを検査し、不具合搬送ロールを特定するガラスリボンの搬送ロールの欠陥特定方法。
- ガラスリボンを搬送する多数本の搬送ロールが設置されたガラスリボン搬送装置において、
前記多数本の搬送ロールのうち所定領域において区分けされた複数の搬送ロール群を有し、区分けされた搬送ロール群ごとに搬送ロールの少なくともガラスリボンと接する表面部分の材料の組成を異ならしめてあるガラスリボン搬送装置。 - 前記搬送ロールの表面に被覆膜が形成され、所定領域において区分けされた搬送ロール群の搬送ロールの被覆膜に夫々検知成分が含有されており、当該検知成分の組成分析結果の差異により搬送ロール群を特定できるようにされた請求項7に記載のガラスリボン搬送装置。
- 前記被覆膜が、母材と検知成分を含有しており、前記母材は、シリカ、アルミナ、チタニア、ジルコニアおよび希土類酸化物からなる群より選ばれる少なくとも一種からなり、
前記検知成分は、アルカリ土類金属酸化物、アルミナ、酸化鉄、酸化ニッケル、チタニア、酸化亜鉛および希土類酸化物の群から選ばれる少なくとも一種からなり、
前記検知成分の含有量が搬送ロール群の所定の搬送ロールごとに異ならしめてあり、前記検知成分の量の分析結果により搬送ロール群を特定できるようにされた請求項8に記載のガラスリボン搬送装置。 - 前記母材中の希土類酸化物は、イットリア、セリアおよびランタニアからなる群より選ばれる少なくとも一種である請求項9に記載のガラスリボン搬送装置。
- 前記検知成分の含有量が前記母材に対し、1%~20%(質量百分率)の範囲で搬送ロール群ごとに変化されている請求項7~10のいずれか1項に記載のガラスリボン搬送装置。
- 溶融ガラスを所定厚さと所定幅のガラスリボンに成形した後、このガラスリボンを搬送ロールにより徐冷条件に制御された徐冷炉内を連続的に搬送しながら徐冷し、切断可能な温度まで冷却し、所定のサイズにガラスリボンを切断する板ガラスの製造方法であって、
前記徐冷炉内を連続的搬送する際に、請求項1~6のいずれか1項に記載のガラスリボンの搬送ロールの欠陥特定方法によってガラスリボンの搬送ロールの欠陥を特定する板ガラスの製造方法。 - 溶融ガラスを溶融金属が貯溜されたフロートバスの溶融金属層面上に連続的に供給し、フロートバスの溶融金属層面に沿って浮かしながら移動させて所定厚さと所定幅のガラスリボンに成形し、成形されたガラスリボンをフロートバスから引き出し搬送ロールにより搬送した後、搬送されたガラスリボンを搬送ロールにより徐冷条件に制御された徐冷炉内を連続的搬送しながら徐冷し、切断可能な温度まで冷却し、次いで所定のサイズにガラスリボンを切断するフロート法の板ガラス生産の操業方法であって、請求項1~6のいずれか1項に記載のガラスリボンの搬送ロールの欠陥特定方法によってガラスリボンの搬送ロールの欠陥を特定するフロート法による板ガラス生産の操業方法。
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| CN106841532B (zh) * | 2017-03-22 | 2019-03-29 | 东旭科技集团有限公司 | 玻璃基板生产用牵引辊缺陷检测方法及牵引辊移动装置 |
| CN109399118A (zh) * | 2018-12-01 | 2019-03-01 | 中航三鑫太阳能光电玻璃有限公司 | 一种固化炉镀膜固化段的传送装置 |
| KR102530405B1 (ko) * | 2019-02-15 | 2023-05-09 | 주식회사 엘지화학 | 플로트 유리 제조 장치 및 방법 |
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