CN103906714A - Support roll, molding device for plate glass having support roll, and molding method for plate glass using support roll - Google Patents

Support roll, molding device for plate glass having support roll, and molding method for plate glass using support roll Download PDF

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Publication number
CN103906714A
CN103906714A CN201280051775.0A CN201280051775A CN103906714A CN 103906714 A CN103906714 A CN 103906714A CN 201280051775 A CN201280051775 A CN 201280051775A CN 103906714 A CN103906714 A CN 103906714A
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China
Prior art keywords
support roll
rotating member
molten glass
glass passing
passing
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Granted
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CN201280051775.0A
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CN103906714B (en
Inventor
富田成明
后藤真毅
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AGC Inc
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Asahi Glass Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B18/00Shaping glass in contact with the surface of a liquid
    • C03B18/02Forming sheets
    • C03B18/04Changing or regulating the dimensions of the molten glass ribbon
    • C03B18/06Changing or regulating the dimensions of the molten glass ribbon using mechanical means, e.g. restrictor bars, edge rollers

Abstract

A support roll (40) used to suppress shrinkage in the width direction (Y direction) of a strip-shaped molten glass ribbon (G), has in the tip section thereof, a rotating member (50) that comes in contact with the molten glass ribbon (G). The rotating member (50) comprises a main body section (53), and a plurality of protruding sections (54) provided along the outer periphery of the main body section (53). Of the rotating member (50), at least the protruding sections (54) are formed using tool steel.

Description

Support roll, have support roll sheet glass building mortion and used the manufacturing process of the sheet glass of support roll
Technical field
The present invention relates to a kind of support roll, have support roll sheet glass building mortion and used the manufacturing process of the sheet glass of support roll.
Background technology
As the manufacturing process of sheet glass, be widely used float glass process.Float glass process is that the melten glass that for example makes to import to, on the molten metal (, molten tin) being housed in bath flows to prescribed direction, is formed as the method for the molten glass passing of band plate-like.Molten glass passing, is annealed in annealing furnace from molten metal pull-up by runner after being cooled in the mobile process of along continuous straight runs, becomes plate glass.Plate glass, after annealing furnace is taken out of, cuts into the size shape of regulation by stapling machine, becoming product is sheet glass.
In addition, as another manufacturing process, also known have a method of fusion.Method of fusion is that the melten glass overflowing from the upper limb of the left and right sides of tubbiness member is flowed down along the left and right sides of tubbiness member, is lower edge interflow at the intersection of left and right sides, forms thus the method for the molten glass passing of band plate-like.Molten glass passing is mobile to vertical below on one side, is annealed on one side, becomes plate glass.Plate glass is cut into the size shape of regulation by stapling machine, becoming product is sheet glass.
But, want to shrink along width in the molten glass passing of the state thinner than equilibrium thickness.In the time that contraction is excessive, product is the thickness thickening that the thickness of sheet glass is compared target.
Therefore, all the time, in order to suppress the contraction of width of molten glass passing, used the support roll (for example,, with reference to patent documentation 1) that molten glass passing is supported.Support roll is multipair in the configuration of the width both sides of molten glass passing, and molten glass passing is applied to tension force along width.
Support roll has the rotating member contacting with the surface of molten glass passing at leading section.Rotating member is for example discoid, has the jog of gear-like in periphery.The protuberance of jog is absorbed in to molten glass passing, suppresses thus the contraction of molten glass passing.
Formerly technical literature
Patent documentation
Patent documentation 1: TOHKEMY 2008-239370 communique
Summary of the invention
The problem that invention will solve
Rotating member in the past mainly by stainless steel (according to JIS (JIS), be expressed as the steel of SUS) or carbon steel (according to JIS (JIS), be expressed as the steel of SC) form, the front end of the protuberance being therefore absorbed in to molten glass passing is easily out of shape, and in weather resistance, has problems.
Although rotating member is inner by water-cooled, when with glass contact, the temperature rise of contact part.Current material is carbon steel or stainless words, and the undercapacity under high temperature is deforming in the situation of protuberance or long-term creep, high temperature fatigue because of the large stress of certain variation.In the time of convex part deformation, become the adhesion starting point of molten glass passing, produce and become that fault cause or grasp decline and the problem such as forming board glass stably.
The present invention completes in view of above-mentioned problem, and object is to provide a kind of support roll of excellent in te pins of durability.
For solving the means of problem
In order to solve above-mentioned purpose, the invention provides a kind of support roll, for the contraction on the width of the tabular molten glass passing of inhibition zone, wherein,
There is the rotating member contacting with described molten glass passing at leading section,
Multiple protuberances that described rotating member possesses main part and arranges along the periphery of this main part, at least described protuberance in described rotating member is formed by tool steel.
Invention effect
According to the present invention, can provide a kind of support roll of excellent in te pins of durability.
Brief description of the drawings
Fig. 1 is the part sectioned view that represents the building mortion of the sheet glass of one embodiment of the present invention.
Fig. 2 is the sectional view along II-II line of Fig. 1.
Fig. 3 is the front view that represents the support roll of one embodiment of the present invention.
Fig. 4 is the partial enlarged drawing in the cross section along IV-IV line of Fig. 3.
Fig. 5 is the figure of the protuberance of explanation rotating member.
Embodiment
Below, with reference to accompanying drawing, one embodiment of the present invention is described.In following accompanying drawing, for same or corresponding structure, mark same or corresponding label, description thereof is omitted.
(building mortion of sheet glass and manufacturing process)
Fig. 1 is the part sectioned view that represents the building mortion of the sheet glass of one embodiment of the present invention.Fig. 2 is the sectional view along II-II line of Fig. 1.
The building mortion 10 of sheet glass has molten metal bath 20.Molten metal bath 20 for example, by the sidewall 24 of accommodating the bath 22 of molten metal (, molten tin) S, arrange along the periphery upper limb of bath 22 and link with sidewall 24 and the formation such as top 26 that the top of bath 22 is covered.Be provided with at top 26 to the gas that is formed on space 28 between bath 22 and top 26 and supplies with reducing gas and supply with road 30.And gas is supplied with in road 30 and inserted the well heater 32 as heating source, the heating part 32a of well heater 32 is configured in the top of bath 22.
The manufacturing process that has used above-mentioned building mortion 10 is that for example, melten glass by making to import on molten metal (, molten tin) S flows to prescribed direction, and forms the method for the molten glass passing G of band plate-like.Molten glass passing G, is annealed in annealing furnace from molten tin S pull-up by runner after being cooled in the process mobile along prescribed direction (in Fig. 2, directions X), becomes plate glass.Plate glass, after annealing furnace is taken out of, is cut into the size shape of regulation by stapling machine, becoming product is sheet glass.
Space 28 in molten metal bath 20 is full of by supplying with from gas the reducing gas of supplying with on road 30 in order to prevent the oxidation of molten tin S.The hydrogen that reducing gas comprises for example 1~15 volume %, the nitrogen of 85~99 volume %.Space 28 in molten metal bath 20 is sneaked into and is set as the air pressure higher than normal atmosphere from the gap of sidewall 24 etc. in order to prevent atmosphere.
In order to regulate the temperature distribution in molten metal bath 20, well heater 32, for example along the flow direction (directions X) of molten glass passing G and width (Y-direction) is spaced apart arranges multiplely, is configured to rectangular.The output of well heater 32 is controlled so as to more by flow direction (directions X) upstream side of molten glass passing G and the temperature of molten glass passing G is higher.And the temperature broad ways (Y-direction) that the output of well heater 32 is controlled so as to molten glass passing G equates.
In addition, the situation that the building mortion 10 of sheet glass shrinks along width for the molten glass passing G suppressing in molten metal bath 20, and there is the support roll 40 that molten glass passing G is supported.Support roll 40 as shown in Figure 2, multipair in the configuration of the width both sides of molten glass passing G, and molten glass passing G broad ways (in figure, Y-direction) is applied to tension force.
Support roll 40 has the rotating member 50 contacting with molten glass passing G at leading section.Rotating member 50 is absorbed in to the upper surface of molten glass passing G, in the mode of avoiding molten glass passing G broad ways to shrink, the width end of molten glass passing G is supported.By the rotation of rotating member 50, and molten glass passing G is sent to prescribed direction.
(support roll)
Fig. 3 is the front view that represents the support roll of one embodiment of the present invention.Fig. 4 is the partial enlarged drawing in the cross section along IV-IV line of Fig. 3.Fig. 5 is the figure of the protuberance of explanation rotating member, and Fig. 5 (a) represents the cross section of the tapered part of protuberance, and Fig. 5 (b) represents spacing and the height of protuberance.
Support roll 40 is mainly made up of rotating member 50, coupling member 60, shaft component 70.
Shaft component 70 has heat-eliminating medium stream in inside, cooling by heat-eliminating medium mobile in heat-eliminating medium stream, can be by stainless steel (according to JIS (JIS), be expressed as the steel of SUS) or the metallic substance such as carbon steel (according to JIS (JIS), being expressed as the steel of SC) form.Also can be at periphery coiling lagging material of shaft component 70 etc.
Shaft component 70 is for example double wall tube, is made up of inner tube and outer tube.Inner space by inner tube and be formed on the periphery of inner tube and the inner peripheral surface of outer tube between space form heat-eliminating medium stream.
As heat-eliminating medium, can make the gases such as liquid or air such as water.Heat-eliminating medium, by the inner space of inner tube, after the inner space of coupling member 60 and rotating member 50 is supplied with, by the space forming between the periphery of inner tube and the inner peripheral surface of outer tube, is discharged to outside.The heat-eliminating medium of discharging to outside is cooling by water cooler, can again reflux to the inner space of inner tube.It should be noted that, the flow direction of heat-eliminating medium can be also in the other direction.
As shown in Figure 1, shaft component 70 connects sidewall 24, in the outside of molten metal bath 20, is connected with the drive unit 34 being made up of motor, speed reduction unit etc.By the work of drive unit 34, shaft component 70, coupling member 60 and rotating member 50 be rotation centered by the central axis of shaft component 70 and integratedly.
Coupling member 60 is members that shaft component 70 and rotating member 50 are linked.Coupling member 60 has the inner space being communicated with the heat-eliminating medium stream of shaft component 70 in inside.Coupling member 60 is for example tubular, and the external diameter of the end of shaft component 70 sides of coupling member 60 and internal diameter are identical with external diameter and the internal diameter of the outer tube of shaft component 70 respectively.Coupling member 60 docks with the outer tube of shaft component 70, for example, link coaxially by welding.Coupling member 60 is preferably and the easily material of welding of shaft component 70, is more preferably formed by same material.
(rotating member)
As shown in Figure 3, rotating member 50 is discoid, and the central axis of the central axis of rotating member 50 and shaft component 70 is on same straight line.
As shown in Figure 1, rotating member 50 contacts with the surface (being upper surface in the present embodiment) of molten glass passing G in periphery.By the rotation of rotating member 50, molten glass passing G is sent to prescribed direction.
As shown in Figure 4, rotating member 50 has the inner space 51 as heat-eliminating medium stream in inside.This inner space 51 is via the peristome of rear side that is formed on rotating member 50, and is communicated with the inner space of coupling member 60.
As shown in Figure 3, multiple protuberances 54 that rotating member 50 has integratedly discoid main part 53 and arranges along the periphery of main part 53.Multiple protuberances 54 are along circumferentially equally spaced arranging.
Each protuberance 54 is in order to be easily absorbed in and can for example, for tapered (, tetrapyamid shape) to molten glass passing G.
The described tapered part of protuberance 54 is with respect to angle A or B(Fig. 5 (a) of the face vertical with shaft component 70) in the time considering the grasp of molten glass passing G, be preferably below 45 °, more preferably below 30 °, more preferably below 25 °.And in the time considering the intensity of described tapered part, angle A or B are preferably more than 15 °.
When the width C (Fig. 5 (a)) of the leading section of the described tapered part of protuberance 54 is considered the grasp of molten glass passing G, be preferably below 2mm, more preferably below 1mm, more preferably below 0.5mm.Described leading section not necessarily needs for linearity, also can curved shape or compound shape.
The space D (Fig. 5 (b)) of protuberance 54, in the time considering the grasp of molten glass passing G, is preferably below 6.5mm, more preferably below 5.5mm.And, in the time considering intensity, the processibility of described tapered part, more than space D is preferably 1.5mm, more preferably more than 2.5mm.
Height E(Fig. 5 (b) of protuberance 54) in the time considering the grasp of molten glass passing G, more than being preferably 4mm, more preferably more than 5mm.And in the time considering intensity, the processibility of described tapered part, height E is preferably below 8mm, more preferably below 7mm.
Protuberance 54 shown in Fig. 3 forms 2 row (with reference to Fig. 4) in the periphery of main part 53, but more than also can forming 3 row, can also only form 1 row.
In the region of 800 DEG C~1000 DEG C described later, use support roll of the present invention, in the time considering cooling the preventing of molten glass passing G, protuberance 54 is preferably formed 1~2 row.
In addition, the radius of rotating member 50 is in the time considering the horizontality of contact preventing with molten glass passing G of coupling member 60, shaft component 70, more than being preferably 100mm, more preferably more than 150mm, more preferably more than 180mm, when considering that rotating member 50 and the position of molten glass passing G are adjusted, when the inching of the speed of rotation of rotating member 50, be preferably below 350mm, more preferably below 300mm, more preferably below 270mm.
At least protuberance 54 in rotating member 50 is formed by tool steel, preferred hot-work die steel.It should be noted that, in the present embodiment, main part 53 is also formed by tool steel.
At this, " hot-work die steel " refers to the alloy tool steel of " hot-work die with " in " SKD " that JIS G4404 records.
As tool steel, be not particularly limited, for example, according to JIS (JIS), can use steel that are expressed as SKS, SKD, SKT, SKH etc.Tool steel can be used for example SKS4, SKS41, SKS42, SKS43, SKS44, SKS1, SKS11, SKS2, SK21, SKS5, SKS51, SKS7, SKS8, SKS3, SKS31, SKS93, SKD1, SKD11, SKD12, SKD2, SKD4, SKD5, SKD6, SKD61, SKT1, SKT2, SKT3, SKT4, SKT5, SKT6, SKH2, SKH3, SKH4A, SKH4B, SKH40, SKH5, SKH51, SKH52, SKH53, SKH54, SKH55, SKH56, SKH57, SKH58, SKH59, SKH10 etc. or by the exploitation steel of the each company after the kind improvement of these materials.Such exploitation steel is taking Fe as principal constituent, preferably, the amount of C is 0.3 quality %~2.5 quality %, and the amount of Si is 0~1.1 quality %, and the amount of Mn is 0~1.1 quality %, the amount of Ni is 0~2.0 quality %, the amount of Cr is 0~13.5 quality %, and the amount of Mo is 0~5.0 quality %, and the amount of V is 0~4.0 quality %, the amount of W is 0~10.0 quality %, and the amount of Co is 0~10.0 quality %.As hot-work die steel, be not particularly limited, can use the improvement steel of SKD61 or each company.Such hot-work die steel is taking Fe as principal constituent, preferably, the amount of C is 0.3 quality %~0.5 quality %, the amount of Si is 0.3 quality %~1.20 quality %, the amount of Mn is 0.4 quality %~0.9 quality %, and the amount of Ni is 0~1.8 quality %, and the amount of Cr is 1.3 quality %~5.50 quality %, the amount of Mo is 0.4 quality %~2.7 quality %, and the amount of V is 0.2 quality %~1.7 quality.From the angle of processibility, cost, hot-work die steel is preferably SKD61.SKD61 is taking Fe as principal constituent, as specified in JIS (JIS), the amount that is C is 0.35 quality %~0.42 quality %, the amount of Si is 0.80 quality %~1.20 quality %, the amount of Mn is 0.25 quality %~0.50 quality %, the amount of P is 0~0.030 quality %, the amount of S is 0~0.020 quality %, the amount of Cr is 4.80 quality %~5.50 quality %, the amount of Mo is 1.00 quality %~1.50 quality %, the amount of V is the steel of 0.80 quality %~1.15 quality %, also can comprise the impurity inevitably containing.SKD61 is expressed as X40CrMoV5-1 sometimes in international standard (ISO4957:1999).
Tool steel is compared with the material in the past such as SUS or SC, and hot strength is high, therefore can suppress the distortion of the protuberance 54 being absorbed in to molten glass passing G, can improve the weather resistance of rotating member 50.
In addition, tool steel is compared with the material in the past such as SUS or SC, and hot strength is high, therefore can carry out the sharpening of protuberance 54 in order to make protuberance 54 easily be absorbed in molten glass passing G.Due to more by the downstream side in molten metal bath 20, the colder and hardening of molten glass passing G, therefore this effect becomes significantly, in the temperature province that in the past cannot use, also can use support roll 40.
As shown in Figure 4, rotating member 50 can have at least a portion of outside surface the protective membrane 55 of excellent corrosion resistance.Particularly preferably there is the protective membrane 55 that comprises chromium nitride or chromium metal.Chromium nitride and chromium metal are higher than hot-work die steel with respect to the spittle of molten tin S or the erosion resistance of steam, therefore can improve the resistance to tin of rotating member 50.
Protective membrane 55 covers the outside surface of protuberance 54, and a part for the outside surface of main part 53 is covered.
As the film of protective membrane 55, there are such as plating method, vapour deposition method, sputtering method, CVD method, ion plating method, sputtering process etc., suitably select according to the shape of protuberance 54 etc.For example, in the situation that protuberance 54 carries out sharpening, the dry-coated methods such as preferred vapour deposition method, sputtering method, ion plating method.
Rotating member 50 waits by welding and is integrated with coupling member 60, supplies with as 1 parts.Arranging in the factory of building mortion 10, if store above-mentioned parts,, in the time that protuberance 54 is out of shape, by the replacing of above-mentioned parts, can carry out the repairing of support roll 40.Coupling member 60 and the welding portion of shaft component 70 are cut off in this repairing, after above-mentioned parts have been carried out changing, coupling member 60 and the outer tube of shaft component 70 are welded to carry out.In the time of the replacing of above-mentioned parts, can recycle, reuse shaft component 70.
(purposes of support roll)
Support roll 40 is not particularly limited, but for example in the shaping of the sheet glass of flat-panel monitor (FPD) use such as liquid-crystal display (LCD), plasma display (PDP), OLED display, uses.
In recent years, the slimming progress of FPD, the thin plateization progress of the sheet glass that FPD uses.Therefore, the thickness attenuation of molten glass passing G, the convergent force of the width of molten glass passing G strengthens, and the forming temperature of molten glass passing G raises.
Support roll 40 of the present invention, in the time considering the plasticity of molten glass passing G, is preferably 10 in the viscosity of molten glass passing G 3[dPas]~10 13in the region of [dPas], use.,, the in the situation that of described non-alkali glass, preferably in being the region of 800 DEG C~1400 DEG C, the temperature of molten glass passing G uses.Be 10 in the viscosity of molten glass passing G in the past 6.5[dPas]~10 13the region 1 of [dPas], be in the situation of described non-alkali glass, in the temperature of molten glass passing G is the region 1 of 800 DEG C~1000 DEG C, be difficult to carry out stable firmly grasping, even if but support roll of the present invention 40 also can carry out stable firmly grasping in described region 1, therefore at least more preferably uses in described region 1.
The support roll 40 of present embodiment is high due to the hot strength of the protuberance 54 being absorbed in to molten glass passing G as described above, and can sharpening due to protuberance 54, is therefore suitable for the shaping of the sheet glass that FPD uses.
Product is that the kind of sheet glass is not particularly limited, for example, can be non-alkali glass.Non-alkali glass is not contain in fact alkalimetal oxide (Na 2o, K 2o, Li 2o) glass.Total amount (the Na of the amount of the alkalimetal oxide in non-alkali glass 2o+K 2o+Li 2o) can be for for example below 0.1%.
Non-alkali glass for example represents by the quality percentage of oxide compound benchmark, contains 50~73%, preferably 50~66% SiO 2, 10.5~24% Al 2o 3, 0~12% B 2o 3, 0~10%, preferably 0~8% MgO, 0~14.5% CaO, 0~24% SrO, 0~13.5% BaO, 0~5% ZrO 2, and contain 8~29.5%, preferred 9~29.5%MgO+CaO+SrO+BaO.
Non-alkali glass is high and consider melting in the situation that, preferably, to represent by the quality percentage of oxide compound benchmark at strain point, contains 58~66% SiO 2, 15~22% Al 2o 3, 5~12% B 2o 3, 0~8% MgO, 0~9% CaO, 3~12.5% SrO, 0~2% BaO, and contain 9~18% MgO+CaO+SrO+BaO.
Non-alkali glass in the situation that considering high strain-point, preferably, represents by the quality percentage of oxide compound benchmark, contains 54~73% SiO 2, 10.5~22.5% Al 2o 3, 0~5.5% B 2o 3, 0~10% MgO, 0~9% CaO, 0~16% SrO, 0~2.5% BaO, 8~26% MgO+CaO+SrO+BaO.
Above, one embodiment of the present invention and variation thereof have been described, but the present invention is not limited to above-mentioned embodiment and variation thereof.Do not depart from the scope of the present invention, can apply various distortion and displacement to above-mentioned embodiment and variation thereof.
For example, the support roll 40 of present embodiment only uses in the region of the part in molten metal bath 20, and the support roll that for example also can be used as downstream side uses.This be because, in downstream side, the cooling and hardening of molten glass passing, therefore promptly property easily becomes problem.
In addition, the support roll 40 of present embodiment uses in float glass process, but also can in other manufacturing process, use, for example, can in method of fusion, use.
The in the situation that of method of fusion, the rotating member of support roll is cylindric or cylindric, with 2 the 1 group use of mode from table side and dorsal part clamping molten glass passing.The support roll group being made up of 2 support rolls is multipair in the configuration of the width both sides of molten glass passing.
In addition, the in the situation that of method of fusion, the building mortion of sheet glass has the tubbiness member of continuous supply melten glass.The melten glass overflowing from the upper limb of the left and right sides of tubbiness member flows down along the left and right sides of tubbiness member, at the crossing lower edge interflow of left and right sides and integrated, becomes thus molten glass passing.Molten glass passing applies tension force by multipair support roll group broad ways, can suppress the contraction of width on one side, sends downwards on one side.
In addition, the rotating member 50 of present embodiment has protective membrane 55, but also can not have protective membrane 55.
In addition, the inner tube of the shaft component 70 of present embodiment is configured in the inner side of outer tube, but also can extend to the inner side of coupling member 60 or the inner side of rotating member 50.If extend, the mobile of heat-eliminating medium in the inner space 51 of the inner space of coupling member 60 or rotating member 50 is rectified, and the cooling efficiency of coupling member 60 or rotating member 50 raises.
Embodiment
Below, wait and specifically describe the present invention by embodiment, but the present invention is not subject to the restriction of these examples.
In embodiment 1, the support roll shown in Fig. 3 and Fig. 4 is contacted with the molten glass passing in molten metal bath, study the protuberance being absorbed in to molten glass passing and had or not distortion.
As the rotating member of support roll, used main part and protuberance by SKD61(Hitachi Metals society system, DAC) form structure.The intensity of SKD61 has been used the structure that Rockwell hardness (HRC) is 30~40.By dry-coated method, form the protective membrane of chromium nitride on surface.
Having or not of the distortion of protuberance after molten glass passing contacts 100 days continuously with rotating member, confirmed by visual making.Consequently, in embodiment 1, the distortion to protuberance unconfirmed.
On the other hand, in comparative example 1, except main part and the protuberance of rotating member replace SKD61 and being made up of S25C, test under condition similarly to Example 1.
The result of test is that, in comparative example 1, the front end bending of protuberance, has confirmed the distortion of protuberance.
Thus, according to embodiment 1, confirmed to provide the support roll of excellent in te pins of durability.
Industrial utilizability
The present invention is suitable for support roll, have support roll sheet glass building mortion and used the manufacturing process of the sheet glass of support roll.
The Japanese Patent Application 2011-251275 that the application filed an application to the patent Hall of Japan based on November 17th, 2011, the right of priority of opinion this application, by the full content with reference to comprising this application.
Label declaration
The building mortion of 10 sheet glasss
20 molten metal baths
40 support rolls
50 rotating members
53 main parts
54 protuberances
55 protective membranes
G molten glass passing

Claims (7)

1. a support roll, for the contraction on the width of the tabular molten glass passing of inhibition zone, wherein,
There is the rotating member contacting with described molten glass passing at leading section,
Multiple protuberances that described rotating member possesses main part and arranges along the periphery of this main part, at least described protuberance in described rotating member is formed by tool steel.
2. support roll according to claim 1, wherein,
Described tool steel is hot-work die steel.
3. support roll according to claim 2, wherein,
Described hot-work die steel is SKD61.
4. according to the support roll described in any one in claim 1~3, wherein,
Described rotating member has the protective membrane that comprises chromium nitride or chromium metal at least a portion of outside surface.
5. according to the support roll described in any one in claim 1~4, wherein,
Described rotating member is member discoid and that contact with the molten glass passing in molten metal bath.
6. a building mortion for sheet glass, has the support roll described in any one in claim 1~5.
7. a manufacturing process for sheet glass, has right to use and requires the support roll described in any one in 1~5 to suppress the operation of the contraction of the width of described molten glass passing.
CN201280051775.0A 2011-11-17 2012-10-24 Support roll, there is the building mortion of the sheet glass of support roll and employ the manufacturing process of sheet glass of support roll Active CN103906714B (en)

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JP2011-251275 2011-11-17
JP2011251275 2011-11-17
PCT/JP2012/077521 WO2013073353A1 (en) 2011-11-17 2012-10-24 Support roll, molding device for plate glass having support roll, and molding method for plate glass using support roll

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CN103906714B CN103906714B (en) 2016-02-24

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CN103906714B (en) 2016-02-24

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