WO2013118537A1 - Dispositif de traitement thermique et procédé de traitement thermique - Google Patents

Dispositif de traitement thermique et procédé de traitement thermique Download PDF

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Publication number
WO2013118537A1
WO2013118537A1 PCT/JP2013/050482 JP2013050482W WO2013118537A1 WO 2013118537 A1 WO2013118537 A1 WO 2013118537A1 JP 2013050482 W JP2013050482 W JP 2013050482W WO 2013118537 A1 WO2013118537 A1 WO 2013118537A1
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WO
WIPO (PCT)
Prior art keywords
heat treatment
ring
shaped
glass
glass ribbon
Prior art date
Application number
PCT/JP2013/050482
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English (en)
Japanese (ja)
Inventor
俊二 井上
Original Assignee
旭硝子株式会社
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Filing date
Publication date
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Publication of WO2013118537A1 publication Critical patent/WO2013118537A1/fr

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Classifications

    • 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
    • C03B35/181—Materials, coatings, loose coverings or sleeves thereof
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B25/00—Annealing glass products
    • C03B25/04—Annealing glass products in a continuous way
    • C03B25/06—Annealing glass products in a continuous way with horizontal displacement of the glass products
    • C03B25/08—Annealing glass products in a continuous way with horizontal displacement of the glass products of glass sheets
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B29/00—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins
    • C03B29/04—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins in a continuous way
    • C03B29/06—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins in a continuous way with horizontal displacement of the products
    • C03B29/08—Glass sheets
    • 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
    • C03B35/185—Construction of the conveyor rollers ; Materials, coatings or coverings thereof having a discontinuous surface for contacting the sheets or ribbons other than cloth or fabric, e.g. having protrusions or depressions, spirally wound cable, projecting discs or tires
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • 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
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • 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
    • F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
    • 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 tunnel furnace
    • 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 tunnel furnace being carried by a conveyor
    • F27B9/2407—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 tunnel furnace being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)

Definitions

  • the present invention relates to a heat treatment apparatus and a heat treatment method.
  • the plate glass manufacturing apparatus forms molten glass into a strip-shaped glass ribbon, slowly cools the formed glass ribbon in a slow cooling furnace, and then cuts it to a predetermined size with a cutting device to manufacture a plate glass.
  • the temperature in the slow cooling furnace becomes lower as it goes from the inlet toward the outlet, and a plurality of transport rolls for transporting the glass ribbon in a predetermined direction are provided in the slow cooling furnace (see, for example, Patent Document 1).
  • the temperature difference between the atmospheric temperature in the heat treatment furnace (for example, a slow cooling furnace) and the temperature of the strip (for example, a glass ribbon) transported in the heat treatment furnace is large, the temperature unevenness of the transport roll contacting both the atmosphere and the strip
  • the conveyance roll may bend by thermal stress.
  • the transport speed of the transport roll changes. For this reason, a difference occurs in the transport speed of the strips by the plurality of transport rolls, and excessive stress is locally generated in the strips, which may damage the strips.
  • This invention was made in view of the said subject, Comprising: It aims at provision of the heat processing apparatus and heat processing method which can suppress the damage of the strip
  • a heat treatment apparatus includes: In a heat treatment apparatus comprising a heat treatment furnace and a plurality of transport rolls disposed in the heat treatment furnace and transporting the strip in a predetermined direction, At least one of the transporting rolls includes a rotating shaft portion and a ring-shaped portion that is provided on an outer periphery of the rotating shaft portion and contacts the belt-like object, and the ring-shaped portion extends along the axial direction of the rotating shaft portion. A plurality are provided at intervals.
  • the heat treatment method includes: In a heat treatment method for heat treatment while transporting a strip in a predetermined direction with a plurality of transport rolls arranged in a heat treatment furnace, At least one of the transporting rolls includes a rotating shaft portion and a ring-shaped portion that is provided on an outer periphery of the rotating shaft portion and contacts the belt-like object, and the ring-shaped portion extends along the axial direction of the rotating shaft portion. A plurality are provided at intervals.
  • a heat treatment apparatus and a heat treatment method capable of suppressing damage to a belt-like material conveyed in a heat treatment furnace.
  • FIG. 1 is a cross-sectional view showing a sheet glass manufacturing apparatus including a slow cooling apparatus as a heat treatment apparatus according to an embodiment of the present invention.
  • FIG. 2 is a view partially showing an example of a transport roll disposed in a downstream region in the slow cooling furnace.
  • 3 (a) to 3 (c) are cross-sectional views showing examples of the shape of the outer peripheral portion of the ring-shaped portion.
  • FIG. 4 is a cross-sectional view showing a modification of the ring-shaped portion.
  • 5 (a) and 5 (b) are diagrams showing an example of an arrangement pattern of the ring-shaped portion of the transport roll disposed in the downstream region in the slow cooling furnace.
  • FIG. 1 is a cross-sectional view showing a sheet glass manufacturing apparatus provided with a slow cooling apparatus as a heat treatment apparatus according to an embodiment of the present invention.
  • the plate glass manufacturing apparatus 100 includes a melting apparatus 200 that melts the glass raw material 10 to produce the molten glass 12, a molding apparatus 300 that forms the molten glass 12 supplied from the melting apparatus 200 into a strip shape, and a glass ribbon 14; And a slow cooling device 400 that slowly cools the glass ribbon 14 molded by the molding device 300.
  • the melting apparatus 200 includes a melting tank 210 that stores the molten glass 12 and a burner 220 that forms a flame above the molten glass 12 stored in the melting tank 210.
  • the glass raw material 10 thrown into the melting tank 210 is gradually melted into the molten glass 12 by the radiant heat from the flame formed by the burner 220.
  • the molten glass 12 is continuously supplied from the melting tank 210 to the molding apparatus 300.
  • the forming apparatus 300 is a float forming apparatus, for example, and includes a bathtub 320 that accommodates a molten metal (for example, molten tin) 310.
  • the forming apparatus 300 forms the glass ribbon 14 by forming the molten glass 12 continuously supplied onto the molten metal 310 into a strip shape by causing the molten glass 12 to flow in a predetermined direction on the molten metal 310.
  • the glass ribbon 14 is cooled while flowing in a predetermined direction, and reaches a temperature at which it can be pulled up from the molten metal 310 in the downstream area of the bathtub 320.
  • the glass ribbon 14 pulled up from the molten metal 310 is conveyed to the slow cooling device 400 by the lift-out roll 510.
  • molding apparatus 300 should just be the general structure used for manufacture of plate glass, for example, may be a fusion molding apparatus.
  • the fusion molding apparatus continuously supplies molten glass to the inside of the ridge, joins the molten glass overflowing from the ridge to the left and right sides at the lower edge of the ridge, and stretches it downward to form a band shape.
  • the slow cooling device 400 gradually cools the glass ribbon 14 formed by the forming device 300.
  • the slow cooling device 400 includes, for example, a slow cooling furnace (rare) 410 having a heat insulating structure, and a plurality of transporting rolls 420 and 430 that are disposed in the slow cooling furnace 410 and transport the glass ribbon 14 in a predetermined direction (the arrow direction in the figure). including.
  • the glass ribbon 14 carried out from the outlet 414 of the slow cooling furnace 410 is cut into a predetermined size by a cutting machine, and a plate glass as a product is obtained.
  • the atmospheric temperature in the slow cooling furnace 410 becomes lower as it goes from the inlet 412 to the outlet 414 of the slow cooling furnace 410.
  • the atmospheric temperature in the slow cooling furnace 410 may be adjusted by a heater 440 (or / and a cooler) provided in the slow cooling furnace 410 or the like.
  • the heater 440 is fixed to the ceiling, hearth, or side wall of the slow cooling furnace 410.
  • a plurality of heaters 440 may be arranged in a direction parallel to the width direction of the glass ribbon 14 and may be controlled independently.
  • the plurality of transport rolls 420 and 430 are rotatable around the central axis of each transport roll 420 and 430.
  • the central axes of the transport rolls 420 and 430 are parallel to the width direction of the glass ribbon 14.
  • the plurality of transport rolls 420 and 430 are rotated by a rotation motor (not shown) to transport the glass ribbon 14 in a predetermined direction.
  • the glass ribbon 14 is gradually cooled while being transported horizontally in the predetermined direction on the transport rolls 420 and 430, and is unloaded from the outlet 414 of the slow cooling furnace 410.
  • the glass ribbon temperature in the vicinity of the outlet 414 of the slow cooling furnace 410 is a temperature below the strain point of the glass (for example, 200 to 400 ° C.). Since the residual strain hardly occurs due to temperature unevenness at a temperature below the strain point of the glass, the glass ribbon 14 carried out from the outlet 414 of the slow cooling furnace 410 is allowed to cool.
  • FIG. 2 is a diagram partially showing an example of a transport roll disposed in the downstream area in the slow cooling furnace.
  • FIG. 2 is a diagram when the glass ribbon 14 is viewed from the front in the conveying direction.
  • the air flows into the slow cooling furnace 410 from the outlet 414 of the slow cooling furnace 410, the atmospheric temperature is lower than the glass ribbon temperature, and the temperature difference between the atmospheric temperature and the glass ribbon temperature is large. .
  • the transport roll 430 includes a rotating shaft portion 432 and a ring-shaped portion 434 that is provided on the outer periphery of the rotating shaft portion 432 and contacts the glass ribbon 14 in order to suppress heat transfer from the glass ribbon 14. Since a plurality of ring-shaped portions 434 are provided at intervals along the axial direction of the rotating shaft portion 432, the contact area between the glass ribbon 14 and the transport roll 430 is small, and heat transfer from the glass ribbon 14 to the transport roll 430 is reduced. It is suppressed.
  • the region where the transport roll 430 having the above-described configuration is disposed is a downstream region in the slow cooling furnace 410, the glass ribbon 14 is cooled and hardened. Therefore, even if the transport roll 430 partially supports the glass ribbon 14 along the width direction, the glass ribbon 14 hardly hangs down by its own weight.
  • the glass ribbon is soft and easily deformed in the upstream region and the middle flow region in the slow cooling furnace 410. Therefore, the transport rolls 420 disposed in these regions may support the glass ribbon 14 over the entire width direction.
  • the temperature difference between the glass ribbon temperature and the ambient temperature is small, and the conveyance roll 420 disposed in these regions does not need to reduce the contact area with the glass ribbon 14.
  • the reason why the temperature difference between the glass ribbon temperature and the ambient temperature is small in these regions is that the space between the inlet 412 of the slow cooling furnace 410 and the outlet of the molding apparatus 300 is shielded from the atmosphere by a box 520 having a heat insulating structure. It is.
  • the rotating shaft portion 432 is made of an alloy or the like.
  • As the alloy general structural rolled steel (SS material), stainless steel, die steel and the like are used.
  • the rotation shaft portion 432 is separated from the glass ribbon 14 by a plurality of ring-shaped portions 434 provided on the outer periphery of the rotation shaft portion 432.
  • the ring-shaped portion 434 rotates together with the rotating shaft portion 432 and conveys the glass ribbon 14 in a predetermined direction.
  • the ring-shaped portion 434 is formed separately from the rotation shaft portion 432, and is fixed to the rotation shaft portion 432 by shrink fitting, for example. That is, the ring-shaped portion 434 is fitted with the rotating shaft portion 432 in a state where the inner diameter is greatly expanded by heating. Thereafter, when the ring-shaped portion 434 is cooled and the inner diameter of the ring-shaped portion 434 is restored, the ring-shaped portion 434 tightens the rotating shaft portion 432.
  • the rotating shaft portion 432 fitted into the ring-shaped portion 434 may be plastically deformed with a punch or the like to form a convex portion around the ring-shaped portion 434. 432 and the ring-shaped portion 434 may be welded.
  • the thermal expansion of the ring-shaped part 434 is less than or equal to that of the rotating shaft part 432 so that the inner diameter of the ring-shaped part 434 does not become larger than the outer diameter of the rotating shaft part 432 due to temperature rise.
  • the ring-shaped portion 434 is made of, for example, heat resistant steel, carbon, ceramic fiber, or glass fiber.
  • stainless steel or die steel is used as the heat resistant steel.
  • the stainless steel may contain 18% by mass or more of chromium (Cr). Since stainless steel and die steel have high hardness, they have excellent scratch resistance and are suitable as materials that come into contact with the hard glass ribbon 14.
  • the heat-resistant steel may be a heat-treated steel that has been quenched or a nitrided steel that has been nitrided to increase hardness. Carbon is excellent in lubricity.
  • As the ceramic fiber for example, a fiber mainly composed of silica (SiO 2 ) -alumina (Al 2 O 3 ) is used. Ceramic fibers and glass fibers are excellent in heat resistance.
  • rotating shaft part 432 and the ring-shaped part 434 are formed separately, you may form integrally.
  • FIG. 3 is a cross-sectional view showing an example of the shape of the outer peripheral portion of the ring-shaped portion.
  • FIG. 3 is a cross-sectional view when viewed from a cross section including the central axis of the ring-shaped portion, and is a view when viewed from a predetermined direction (conveying direction).
  • the outer peripheral portion of the ring-shaped portion 434 is rounded when viewed from a predetermined direction (conveying direction) so as not to damage the glass ribbon 14. It may be formed.
  • the corners (both ends in the axial direction) of the outer peripheral portion 434a of the ring-shaped portion 434 are chamfered.
  • the corners (both ends in the axial direction) of the outer peripheral portion 434Aa of the ring-shaped portion 434A are chamfered.
  • FIG. 3A the corners (both ends in the axial direction) of the outer peripheral portion 434Aa of the ring-shaped portion 434A are chamfered.
  • the outer peripheral portion 434Ba of the ring-shaped portion 434B has a cross-sectional shape that is convex outward in the radial direction, and radially outwards from both ends toward the center along the axial direction. It protrudes toward.
  • FIG. 4 is a cross-sectional view showing a modification of the ring-shaped portion.
  • FIG. 4 is a cross-sectional view when viewed from a cross section including the central axis of the ring-shaped portion, and is a view when viewed from a predetermined direction (conveying direction).
  • the ring-shaped portion 434C includes a ring-shaped main body portion 435C and a coating layer 436C formed on the outer periphery of the ring-shaped main body portion 435C.
  • plating or thermal spraying is used for the formation of the coating layer 436C. Examples of plating include chrome plating and nickel plating.
  • thermal spray material for example, chromium, nickel, tungsten carbide, cobalt and the like are used. Since the coating layer 436C is in contact with the glass ribbon, the scratch resistance is improved. Moreover, the freedom degree of material design of the ring-shaped main-body part 435C increases.
  • FIG. 5 is a diagram illustrating an arrangement pattern example of the ring-shaped portion of the transport roll disposed in the downstream region in the slow cooling furnace.
  • FIG. 5A is a plan view
  • FIG. 5B is a view when seen from the front in the conveying direction of the glass ribbon.
  • the arrow direction indicates the conveyance direction of the glass ribbon.
  • a plurality of ring-shaped parts 434-1 to 434-4 included in a plurality (for example, four) of transport rollers 430-1 to 430-4 do not overlap with each other in a predetermined direction (transport direction). May be placed in position.
  • any of the plurality of transport rolls 430-1 to 430-4 has a defect and a defect is formed on the surface of the glass ribbon 14 by the rotation of the transport rolls 430-1 to 430-4, the width direction of the glass ribbon 14 By examining the position of the defect, it is possible to easily identify the transport roll causing the defect.
  • Examples of the case where a defect occurs include a case where foreign matter adheres to the outer peripheral surface of any of the plurality of ring-shaped portions 434-1 to 434-4 or a scratch is formed. In these cases, a defect is formed on the surface of the glass ribbon 14 each time the transport rolls 430-1 to 430-4 rotate once. Defects appear periodically at intervals in the conveyance direction of the glass ribbon 14. A transport roll that causes a failure is repaired or replaced.
  • a plurality of transport roll groups including a plurality of transport rolls 430-1 to 430-4 may be provided in a predetermined direction (transport direction). Also in this case, by examining the defect position in the width direction of the glass ribbon 14, it is possible to narrow down the transport roll candidates that cause the problem.
  • a method for further narrowing down the candidates a method in which a plurality of candidates are divided into two groups, a transport roll belonging to one group is separated from the glass ribbon 14, and an inspection is performed based on whether or not the defect disappears when the transport roll is rotated. There is.
  • Other methods include (1) changing the rotation speed of the transport roll belonging to one group and checking whether the cycle of the defect changes when the transport roll is rotated, or (2) one group. There is a method of investigating whether or not the position of the defect is shifted when the transport roll belonging to the above is shifted in the axial direction of each transport roll and the transport roll is rotated.
  • the above methods (1) and (2) can also be used as a method for removing foreign substances adhering to the transport roll.
  • the method (1) it is possible to remove the foreign matter by applying a shear stress to the foreign matter according to the difference in speed between the peripheral speed of the transport roll on which the foreign matter adheres and the transport speed of the glass ribbon 14.
  • the method (2) it is possible to apply a shear stress to the foreign matter and remove the foreign matter by shifting the transport roll to which the foreign matter adheres in the axial direction of the transport roll. If the foreign matter can be removed by the above method (1) or (2), the trouble of repairing or replacing the transport roll that causes a problem is reduced.
  • the type of glass of the plate glass manufactured by the plate glass manufacturing apparatus 100 is not particularly limited, and may be, for example, non-alkali glass or soda lime glass.
  • the alkali-free glass is used for a glass substrate or cover glass for a flat panel display (FPD) such as a liquid crystal display (LCD) or an organic EL display.
  • Soda lime glass is used for window glass of automobiles and window glass of buildings.
  • the alkali-free glass has a higher glass strain point temperature than the soda lime glass, and the glass ribbon 14 conveyed in the slow cooling furnace 410 has a high temperature. Therefore, the ambient temperature and the glass ribbon temperature in the downstream region in the slow cooling furnace 410. And the temperature difference becomes large. Therefore, in the alkali-free glass, the effect of suppressing the heat transfer from the glass ribbon 14 to the transport roll 430 in the downstream region in the slow cooling furnace 410 is significantly obtained as compared with the soda lime glass.
  • the alkali-free glass is a glass that substantially does not contain an alkali metal oxide (Na 2 O, K 2 O, Li 2 O) (that is, does not contain an alkali metal oxide except for inevitable impurities).
  • the total content (Na 2 O + K 2 O + Li 2 O) of the alkali metal oxide content in the alkali-free glass may be, for example, 0.1% or less.
  • the alkali-free glass is, for example, expressed in terms of mass percentage based on oxide, SiO 2 : 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%, ZrO 2 : 0 to 5%, MgO + CaO + SrO + BaO: 9 to 29.5%.
  • the alkali-free glass is preferably expressed in terms of mass percentage based on 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%, and MgO + CaO + SrO + BaO: 9 to 18%.
  • the chemical composition of the plate glass is measured with a commercially available fluorescent X-ray analyzer (for example, ZSX100e, manufactured by Rigaku Corporation).
  • the chemical composition of the plate glass is the same as the chemical composition of the glass ribbon 14.
  • the heat treatment apparatus of the above embodiment heat-treats the belt-shaped glass ribbon 14, but instead of the glass ribbon 14, for example, a ceramic sheet, a resin sheet, a metal sheet, or the like may be heat-treated.
  • the heat treatment furnace of the above embodiment is a slow cooling furnace in which the atmosphere temperature in the heat treatment furnace becomes lower as it goes from the inlet to the outlet of the heat treatment furnace, but the temperature distribution of the atmosphere temperature in the heat treatment furnace is appropriately set according to the application. May be.
  • the atmosphere temperature in the heat treatment furnace may become higher as it goes from the entrance to the exit of the heat treatment furnace. If the temperature difference between the ambient temperature and the band temperature is large in a partial region in the heat treatment furnace, the effect of the present invention can be obtained. The temperature difference between the ambient temperature and the band temperature will be large if an opening into which the outside air enters the heat treatment furnace is formed.
  • the transport roll of the above embodiment transports the belt-shaped glass ribbon horizontally, but may transport the glass ribbon vertically while sandwiching the glass ribbon.
  • the four transport rollers 430-1 to 430-4 have the ring-shaped portions 434-1 to 434-4 having different arrangement patterns, but the number of the arrangement patterns of the ring-shaped portions is not limited. .
  • the two transport rolls may have ring-shaped portions having different arrangement patterns, and in this case, the ring-shaped portions may be staggered.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Glass Compositions (AREA)
  • Tunnel Furnaces (AREA)

Abstract

La présente invention se rapporte à un dispositif de traitement thermique grâce auquel l'endommagement d'un objet en forme de courroie qui est transporté dans un four de traitement thermique peut être évité. Ce dispositif de traitement thermique (400) est équipé d'un four de traitement thermique (410), et de multiples rouleaux de transport (420, 430) qui sont agencés dans le four de traitement thermique (410) et transportent un objet en forme de courroie (14) dans une direction prescrite. Au moins un des rouleaux de transport (430) comprend un élément arbre rotatif (432) et des éléments annulaires (434) qui sont disposés sur la périphérie extérieure de l'élément arbre rotatif (432) et qui entrent en contact avec l'objet en forme de courroie (14), de multiples éléments annulaires (434) étant placés, avec des intervalles entre eux, dans la direction axiale de l'élément arbre rotatif (432).
PCT/JP2013/050482 2012-02-08 2013-01-11 Dispositif de traitement thermique et procédé de traitement thermique WO2013118537A1 (fr)

Applications Claiming Priority (2)

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JP2012024753A JP2015083845A (ja) 2012-02-08 2012-02-08 熱処理装置、及び熱処理方法
JP2012-024753 2012-02-08

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WO2013118537A1 true WO2013118537A1 (fr) 2013-08-15

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Publication number Priority date Publication date Assignee Title
CN111971401A (zh) * 2018-04-02 2020-11-20 株式会社则武 加热炉用运送辊
JP6934123B1 (ja) * 2021-04-19 2021-09-08 株式会社ノリタケカンパニーリミテド 加熱炉用搬送ローラ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08176649A (ja) * 1994-12-20 1996-07-09 Koyo Rindobaagu Kk ローラハース炉用ローラ
WO2009060868A1 (fr) * 2007-11-06 2009-05-14 Asahi Glass Co., Ltd. Rouleau pour le convoyage d'une plaque de verre flotté, procédé pour sa fabrication et procédé pour la fabrication d'une plaque de verre flotté avec ce rouleau
WO2011118534A1 (fr) * 2010-03-25 2011-09-29 日本電気硝子株式会社 Procédé de fabrication d'une plaque en verre et son dispositif
WO2011136149A1 (fr) * 2010-04-28 2011-11-03 旭硝子株式会社 Procédé de production de plaque de verre, et plaque de verre

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08176649A (ja) * 1994-12-20 1996-07-09 Koyo Rindobaagu Kk ローラハース炉用ローラ
WO2009060868A1 (fr) * 2007-11-06 2009-05-14 Asahi Glass Co., Ltd. Rouleau pour le convoyage d'une plaque de verre flotté, procédé pour sa fabrication et procédé pour la fabrication d'une plaque de verre flotté avec ce rouleau
WO2011118534A1 (fr) * 2010-03-25 2011-09-29 日本電気硝子株式会社 Procédé de fabrication d'une plaque en verre et son dispositif
WO2011136149A1 (fr) * 2010-04-28 2011-11-03 旭硝子株式会社 Procédé de production de plaque de verre, et plaque de verre

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