CN103319082A - Manufacturing method of ultrathin heat-reinforced glass - Google Patents
Manufacturing method of ultrathin heat-reinforced glass Download PDFInfo
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- CN103319082A CN103319082A CN2013102610801A CN201310261080A CN103319082A CN 103319082 A CN103319082 A CN 103319082A CN 2013102610801 A CN2013102610801 A CN 2013102610801A CN 201310261080 A CN201310261080 A CN 201310261080A CN 103319082 A CN103319082 A CN 103319082A
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Abstract
The invention discloses a manufacturing method of ultrathin heat-reinforced glass. The manufacturing method comprises the following steps of: flatly placing ultrathin glass with the thickness of 1.8-2.2mm on a rolling way, adjusting the pressure of convection air in a toughening furnace to be 2000-4000pa/cm<2> with the convection time of 30-50s, simultaneously using the rolling way to drive the glass to do reciprocating movement for 40-50S in the toughening furnace at a speed of 20-30mm/s, and then adjusting the operating speed of the rolling way to be 160-175mm/s till the glass is heated to be 623-630 degrees. The glass manufactured by utilizing the method has the advantages that the generation of 'white mist' is avoided, and the glass is good in flatness, high in strength and good in toughness.
Description
Technical field
The present invention relates to glass-making processes, particularly relate to a kind of manufacture method of ultra-thin thermal reinforced glass.
Background technology
Thermal reinforced glass claims half tempered glass again, it is a kind between ordinary plate glass and toughened glass, it is with the part advantage of toughened glass, as the more common float glass height of intensity, be the several times of common float glass, planeness is higher than the planeness of toughened glass simultaneously, be difficult for self-destruction, can be whole not broken in case destroy, therefore, be widely used.
At present, thickness is that the ultra-thin thermal reinforced glass of 1.8-2.2mm mainly exists following problem: the first, the planeness of glass does not reach requirement (≤3 ‰), especially 1.6-2.5 square metre the large-area glass of GB.The second, glass produces in heat-processed and easily produces distortion, the local contact of glass roller-way overlong time, and produce fraying of surface, form " white mist ".Three, because heating inhomogeneous and method of cooling is improper, the glass surface unbalanced stress after make strengthening is even, is difficult for cutting again.
The reason that produces these problems mainly is: the first, have the type of heating of glass and the glass that control method is not suitable for 1.8-2.2mm thickness now.The radiation heating mode is mainly used in traditional heating, and glass enters in the process furnace with normal temperature, and the bottom of glass is with radiation, transmits heat form acquisition heat; But top is stove silk or radial lamella direct radiation glass.Radial lamella is divided into the unit by the stove silk, and there is the flexible and assemblage gap of heat in the place of unit butt joint, can cause the radiation of glass inhomogeneous; And the temperature between each unit is not transmitted.Glass is inhomogeneous owing to being heated, and can produce flexural deformation, and the distortion of glass has just caused local and ceramic roller friction, thereby the part that has produced glass frays.So it is that the common float glass of 1.8-2.2mm is strengthened that the tempering heating process of existing glass has been not suitable for thickness.
The second, glass was heated evenly for making glass in when heating, and convective heating is adopted on glass top usually, but convection current is adopted in the annealing furnace now is pressurized air, and compressed-air actuated convection current is high pressure, to flowing pressure at 0.3-0.5Mpa/cm
2, and few to flow point, can cause between excessive, adjacent two gas orifices of convection current dot center pressure and the too small phenomenon of pressure between two row's convection tubess, can make thin glass heats initial deformation more serious, so that can't carry out tempering to the glass of 1.8-2.2mm.
Three, Leng Que method makes strength of glass wayward.Present glass tempering is after glass heats arrives the tempering temperature, to come out of the stove immediately, with the cold glass of wind, forms tempering.Because wind blows to glass from aperture, the center blast in each hole is big, and the middle portion blast in two holes is little, the blowing although glass is moving, and the intensity of the different sites of glass is different.How to be that glass intensity is more even, namely the surface stress of glass is more even is crucial.
Based on the problems referred to above, it is that the glass of 1.8-2.2 millimeter carries out efficient hardening that the manufacture method of common ultra-thin thermal reinforced glass is difficult to thickness.
Summary of the invention
The manufacture method that the purpose of this invention is to provide a kind of ultra-thin thermal reinforced glass is in order to solve the defective of above-mentioned prior art.
In order to achieve the above object, technical scheme provided by the present invention is: a kind of manufacture method of ultra-thin thermal reinforced glass, it comprises the steps:
(1) heat treated: the ultra-thin glass that 1.8-2.2mm is thick lies on the roller-way, and glass is transferred in the annealing furnace and heats, and the pressure of convection current air in the annealing furnace is adjusted to 2000-4000pa/cm
2Convection current time 30-50s, roller-way drives glass with speed to-and-fro movement in annealing furnace of 20-30mm/s simultaneously, and roller-way drives glass and move 40-50S under the running speed of 20-30mm/s, then the roller-way running speed is adjusted to 160-175mm/s, arrive 623-630 ° until glass heats;
(2) chilling is handled: the ultra-thin glass that will be heated to 623-630 ° is sent to quench area by roller-way, roller-way drive glass with the speed of 130-250mm/s in the quench area to-and-fro movement, simultaneously with the blast of 1500-2500pa to the glass 2-5S that dries, glass temperature is down to 400-460 °, stop blowing then, glass continues to-and-fro movement 5-15S;
(3) cooling process: the glass behind the chilling processing 5-15S is dried again, and blast is controlled at 1500-2500pa, cools off fully until glass, reaches normal temperature, forms ultra-thin thermal reinforced glass.
Further, described roller-way comprises roller-way support and some ceramic roll shafts, and described ceramic roll shaft is set up on the roller-way support; The diameter of described ceramic roll shaft is 50-60mm, and ceramic roll shaft spacing is 95-115mm.
Further, the thickness of described ultra-thin glass is 2mm.
Further, described ultra-thin glass is float glass.
Adopt technique scheme, technique effect of the present invention has:
1, the present invention has changed traditional radiation heating form, and the radial lamella of a plurality of segmentations on annealing furnace top changes an integral radiation pipe into, has increased swept area, and glass is heated soon, and is more balanced.The rate of heating on reinforced glass top and equalization temperature.
2, the present invention has changed the form of top convection current, the few form to discharge orifice of high pressure by 0.3-0.5Mpa/cm2, change 2000-4000pa/cm2 near working pressure and many forms to discharge orifice, to rolling up of discharge orifice, avoided compressed-air actuated inequality to flow, rate of heating and the equalization temperature on reinforced glass top.
When 3, heating, running speed and the heat-up time of control roller-way, effectively avoid glass to produce " white mist ", and glass is heated also more even.
4, chilling treatment process of the present invention can make the stress of glass more even, and intensity is better.
5, glass surface planeness of the present invention can reach below 3 ‰, and requirement meets international standards.
Description of drawings
Fig. 1 is annealing furnace structural representation of the present invention;
Fig. 2 is the side-view of annealing furnace of the present invention;
Wherein: 1, stove silk, 2, radiator tube, 3, convection tubes, 4, roller-way, 31, gas orifice, 41, ceramic roller bearing.
Embodiment
Below in conjunction with description of drawings the specific embodiment of the present invention.
General thickness is the thin float glass of 1.8-2.2mm, is difficult to utilize traditional glass tempering furnace that it is carried out efficient hardening.This is because generally adopt the mode of radial lamella radiation that radiation heating is carried out on glass top in the upper furnace of common annealing furnace, at the some stove silks of transversely being lifted with of burner hearth, the lifting radial lamella that stove silk below is corresponding, several radial lamellas are interrupted setting mutually, owing to have the gap between each radial lamella, radiation scope is restricted, and has caused the inequality of being heated of glass, produces diastrophic situation.Therefore, the ultra-thin glass of 1.8-2.2mm is at the heating initial stage, and the uniform type of heating of lower surface on glass and different zones heating equalized form are that glass is smooth and indeformable basic.
For realizing manufacture method of the present invention, at first common glass tempering furnace is improved, it is faster that glass is heated, more even.
Concrete, as depicted in figs. 1 and 2, the radial lamella of existing glass tempering furnace changed into by the heat-resistance stainless steel pipe make radiator tube 2, be arranged on the below of stove silk 1 in the upper furnace body, some radiator tubes that parallel 2 are connected together side by side mutually, the radiating surface of forming is the waviness radiating surface, with the existing radial lamella ratio that adopts, it is nearly 60% that swept area of the present invention has increased, and heat passage speed is faster, and radiator tube 2 is an one-piece construction, though the heating through different stove silks, being heated of radiator tube 2 integral body can be very even, and be even to the radiation heating of glass, avoided the ultra-thin glass of 1.8-2.2mm to produce flexural deformation because of local heating.The spacing of convection tubes 3 is 260-300mm, and convection tubes 3 is communicated with blower fan, and the diameter of the gas orifice 31 on the convection tubes 3 is made as 2-3mm, is 50mm along the spacing of convection tubes 3 length direction gas orifices 31; Air feeder of the present invention replaces common gas-holder with blower fan, changes the form of top convection current simultaneously, by 0.3-0.5Mpa/cm
2The few form to discharge orifice of high pressure, change 2000-4000pa/cm into
2Near working pressure and many forms to discharge orifice, to rolling up of discharge orifice, avoided compressed-air actuated inequality to flow, blower fan adopts the frequency conversion procedure auto-control, comes rate of heating and the equalization temperature on reinforced glass top with this.Roller-way comprises roller-way support and some ceramic roll shafts 41, and described ceramic roll shaft 41 is set up on the roller-way support.The diameter of described ceramic roll shaft 41 is 50-60mm, and ceramic roll shaft 41 spacings are 95-115mm.
In the heat-processed, at first with the control of the running speed of roller-way 4 at 20-30mm/s, roller-way drives glass and move 40-50S under the running speed of 20-30mm/s, after preventing from heating initial stage glass and being heated, with roller-way 4 relative friction takes place, generation " mist in vain "; Then roller-way 4 running speeds are adjusted to 160-175mm/s, glass fully is heated, surface stress is even; Follow the requirement of toughened glass, glass heats is to 623-630 °.Glass enters when heating in the annealing furnace, and the pressure of convection current air in the annealing furnace is adjusted to 2000-4000pa/cm
2, convection current time 30-50s.
In the chilling treating processes, the ultra-thin glass of 1.8-2.2mm after heat treated is sent to quench area by roller-way, roller-way drives glass with the speed to-and-fro movement of 130-250mm/s, under the blast of 1500-2500pa to glass blowing 2-5S, glass temperature is down to 400-460 °, stop blowing then, roller-way continues to drive glass to-and-fro movement 5-15 second.Blowing for the first time is to increase glass intensity, and the purpose that stops to dry is to make this glass intensity more balanced.Because for the first time the glass temperature after the blowing is at the 400-460 degree, this temperature is greater than 390 ℃ of the temperature of strain point, less than temperature 520-590 ℃ of transition point.
In the cooling process process, the glass after the chilling processing is dried again, blast is controlled at 1500-2500pa, cools off fully until glass.Make glass obtain intensity level uniformly with this method.The present invention can utilize infrared thermometer that glass temperature is measured in real time.
Adopt above-mentioned reasonable quench cooled mode, make glass intensity and toughness reach the use needs, and can cut, the planeness of glass has reached the requirement of GB.
Below be specific embodiments of the invention:
Embodiment one
The ultra-thin glass that 1.8-2.2mm is thick lies on the roller-way, and glass is transferred in the annealing furnace and heats, and the pressure of convection current air in the annealing furnace is adjusted to 2000pa/cm
2, convection current time 30s, simultaneously roller-way drives glass with speed to-and-fro movement in annealing furnace of 20mm/s, and roller-way drives glass and move 40S under the running speed of 20mm/s, then the roller-way running speed is adjusted to 160mm/s, until glass heats to 623 °;
The ultra-thin glass that is heated to 623 ° is sent to quench area by roller-way, roller-way drive glass with the speed of 130mm/s in the quench area to-and-fro movement, simultaneously with the blast of 1500pa to the glass 2S that dries, glass temperature is down to 460 °, stop blowing then, glass continues to-and-fro movement 5S;
Glass behind the chilling processing 5S is dried again, and blast is controlled at 1500pa, cools off fully until glass, reaches normal temperature, forms ultra-thin thermal reinforced glass.
Embodiment two
The ultra-thin glass that 1.8-2.2mm is thick lies on the roller-way, and glass is transferred in the annealing furnace and heats, and the pressure of convection current air in the annealing furnace is adjusted to 3000pa/cm
2, convection current time 40s, simultaneously roller-way drives glass with speed to-and-fro movement in annealing furnace of 25mm/s, and roller-way drives glass and move 45S under the running speed of 25mm/s, then the roller-way running speed is adjusted to 168mm/s, until glass heats to 626 °;
The ultra-thin glass that is heated to 626 ° is sent to quench area by roller-way, roller-way drive glass with the speed of 190mm/s in the quench area to-and-fro movement, simultaneously with the blast of 2000pa to the glass 3.5S that dries, glass temperature is down to 430 °, stop blowing then, glass continues to-and-fro movement 10S;
Glass behind the chilling processing 10S is dried again, and blast is controlled at 2000pa, cools off fully until glass, reaches normal temperature, forms ultra-thin thermal reinforced glass.
Embodiment three
The ultra-thin glass that 1.8-2.2mm is thick lies on the roller-way, and glass is transferred in the annealing furnace and heats, and the pressure of convection current air in the annealing furnace is adjusted to 4000pa/cm
2, convection current time 50s, simultaneously roller-way drives glass with speed to-and-fro movement in annealing furnace of 30mm/s, and roller-way drives glass and move 50S under the running speed of 30mm/s, then the roller-way running speed is adjusted to 175mm/s, until glass heats to 630 °;
The ultra-thin glass that is heated to 630 ° is sent to quench area by roller-way, roller-way drive glass with the speed of 250mm/s in the quench area to-and-fro movement, simultaneously with the blast of 2500pa to the glass 5S that dries, glass temperature is down to 400 °, stop blowing then, glass continues to-and-fro movement 15S;
Glass behind the chilling processing 15S is dried again, and blast is controlled at 2500pa, cools off fully until glass, reaches normal temperature, forms ultra-thin thermal reinforced glass.
Through test determination, the glass that utilizes manufacture method of the present invention to make, the surface stress intensity of glass has reached 25-30Mpa.And use the break bar of high alloy intensity to cut.Following table is to utilize the glass of manufacture method manufacturing of the present invention and the performance comparison table of simple glass;
From then on table by above measure, has been realized the homogeneous heating of glass and the uniform strength of tempering as can be seen, and the surface stress of glass, shock strength and planeness are compared with simple glass, all is significantly increased, and can realizes cutting.
It should be noted that at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
1. the manufacture method of a ultra-thin thermal reinforced glass is characterized in that, it comprises the steps:
(1) heat treated: the ultra-thin glass that 1.8-2.2mm is thick lies on the roller-way, and glass is transferred in the annealing furnace and heats, and the pressure of convection current air in the annealing furnace is adjusted to 2000-4000pa/cm
2Convection current time 30-50s, roller-way drives glass with speed to-and-fro movement in annealing furnace of 20-30mm/s simultaneously, and roller-way drives glass and move 40-50S under the running speed of 20-30mm/s, then the roller-way running speed is adjusted to 160-175mm/s, arrive 623-630 ° until glass heats;
(2) chilling is handled: the ultra-thin glass that will be heated to 623-630 ° is sent to quench area by roller-way, roller-way drive glass with the speed of 130-250mm/s in the quench area to-and-fro movement, simultaneously with the blast of 1500-2500pa to the glass 2-5S that dries, glass temperature is down to 400-460 °, stop blowing then, glass continues to-and-fro movement 5-15S;
(3) cooling process: the glass behind the chilling processing 5-15S is dried again, and blast is controlled at 1500-2500pa, cools off fully until glass, reaches normal temperature, forms ultra-thin thermal reinforced glass.
2. the manufacture method of ultra-thin thermal reinforced glass according to claim 1, it is characterized in that: described roller-way comprises roller-way support and some ceramic roll shafts, and described ceramic roll shaft is set up on the roller-way support; The diameter of described ceramic roll shaft is 50-60mm, and ceramic roll shaft spacing is 95-115mm.
3. the manufacture method of ultra-thin thermal reinforced glass according to claim 1, it is characterized in that: the thickness of described ultra-thin glass is 2mm.
4. according to the manufacture method of claim 1 or 3 described ultra-thin thermal reinforced glass, it is characterized in that: described ultra-thin glass is float glass.
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| CN105236718A (en) * | 2015-08-23 | 2016-01-13 | 洛阳新兆电子有限公司 | Heating process of heating section of thermal-forming furnace for mobile phone 3D curve-surface glass cover plate |
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| CN107572764A (en) * | 2017-09-07 | 2018-01-12 | 洛阳兰迪玻璃机器股份有限公司 | A kind of glass plate convection type heating means |
| WO2019046676A1 (en) * | 2017-08-31 | 2019-03-07 | Corning Incorporated | Improved ceramic roller bed and measurement method |
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| US11485673B2 (en) | 2017-08-24 | 2022-11-01 | Corning Incorporated | Glasses with improved tempering capabilities |
| US11643355B2 (en) | 2016-01-12 | 2023-05-09 | Corning Incorporated | Thin thermally and chemically strengthened glass-based articles |
| US11697617B2 (en) | 2019-08-06 | 2023-07-11 | Corning Incorporated | Glass laminate with buried stress spikes to arrest cracks and methods of making the same |
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| CN104860524B (en) * | 2015-04-08 | 2017-07-07 | 东莞南玻工程玻璃有限公司 | Suitable for the ceramic roller transmission speed adjusting method of annealing furnace |
| CN104860524A (en) * | 2015-04-08 | 2015-08-26 | 东莞南玻工程玻璃有限公司 | Ceramic roller transmission speed adjustment method for toughening furnace |
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| WO2019046676A1 (en) * | 2017-08-31 | 2019-03-07 | Corning Incorporated | Improved ceramic roller bed and measurement method |
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