CN111003931B - Production method of bent tempered glass with Low-E surface capable of contacting roller way of tempering furnace - Google Patents
Production method of bent tempered glass with Low-E surface capable of contacting roller way of tempering furnace Download PDFInfo
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- CN111003931B CN111003931B CN201911405965.8A CN201911405965A CN111003931B CN 111003931 B CN111003931 B CN 111003931B CN 201911405965 A CN201911405965 A CN 201911405965A CN 111003931 B CN111003931 B CN 111003931B
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- 238000005496 tempering Methods 0.000 title claims abstract description 52
- 239000005341 toughened glass Substances 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 239000011521 glass Substances 0.000 claims abstract description 170
- 238000010438 heat treatment Methods 0.000 claims abstract description 140
- 239000000758 substrate Substances 0.000 claims abstract description 85
- 238000005452 bending Methods 0.000 claims abstract description 19
- 238000007688 edging Methods 0.000 claims abstract description 16
- 230000003068 static effect Effects 0.000 claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims description 8
- 239000005357 flat glass Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 1
- 238000004804 winding Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 239000000919 ceramic Substances 0.000 description 5
- 238000006748 scratching Methods 0.000 description 5
- 230000002393 scratching effect Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000005329 float glass Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/04—Tempering or quenching glass products using gas
- C03B27/044—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position
- C03B27/0442—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position for bent glass sheets
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/012—Tempering or quenching glass products by heat treatment, e.g. for crystallisation; Heat treatment of glass products before tempering by cooling
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Abstract
本发明公开一种Low‑E面可接触钢化炉辊道的弯钢化玻璃的生产方法，其包括切割、磨边、清洗、加热和弯钢化成型，加热操作为：将Low‑E玻璃基片的Low‑E膜向下置于钢化炉中并在预设的目标时间内均匀加热至玻璃的软化点温度，加热时，玻璃基片具有静止状态和移动状态，当玻璃基片进入炉膛后，在预设的第一加热时间内，玻璃基片处于静止状态，直至玻璃基片处于不弯曲状态；在预设的第二加热时间内，玻璃基片处于移动状态，第一加热时间与第二加热时间之和等于目标时间；弯钢化成型后得到弯钢化玻璃。本发明提供的生产方法，增加玻璃进入钢化炉时停止移动操作，同时通过加热温度、功率、对流的调整，避免成品玻璃出现擦伤、脱膜等缺陷。
The invention discloses a method for producing bent tempered glass whose Low-E surface can contact the roller table of a tempering furnace. The method includes cutting, edging, cleaning, heating and bending and tempering. The heating operation is: The Low‑E film is placed down in the tempering furnace and heated uniformly to the softening point temperature of the glass within a preset target time. During heating, the glass substrate has a static state and a moving state. During the preset first heating time, the glass substrate is in a static state until the glass substrate is in a non-bending state; during the preset second heating time, the glass substrate is in a moving state, and the first heating time and the second heating time The sum of the time is equal to the target time; the curved tempered glass is obtained after bending and tempering. The production method provided by the present invention increases the stop moving operation when the glass enters the tempering furnace, and at the same time, through the adjustment of heating temperature, power and convection, defects such as scratches and peeling of the finished glass are avoided.
Description
Technical Field
The invention relates to the field of glass production, in particular to a production method of bent tempered glass with a Low-E surface capable of contacting with a roller way of a tempering furnace.
Background
Low-E glass has been widely used in the fields of buildings, automobiles, and the like because of its excellent energy saving performance. Along with the continuous development of the building industry, the diversity of the building design and the demands of customers are changing day by day, the common convex arc Low-E curved toughened glass can not meet the requirements of the customers, and more concave arc Low-E curved toughened glass can enter the market along with the change. Due to the height of the cavity of the coating equipment, the bent toughened glass needs to be coated with a Low-E film and then subjected to bent toughening treatment. The common normalizing and tempering furnace requires that the Low-E surface needs to be fed upwards, namely convex arc-shaped tempering. A metal silver layer is attached to the Low-E surface, and when the Low-E surface is produced downwards, the Low-E surface is in contact with a roller way of a toughening furnace, so that scratches are easily generated, and the Low-E surface turns yellow after being toughened, so that the product quality is seriously influenced. At present, the reverse-bending tempering equipment is available on the market, but the market demand cannot be completely met due to the influence of the arch height and the bending radius, and equipment investment needs to be carried out again. The traditional normalizing tempering furnace can only produce convex curved tempered glass in order to ensure the quality of the film surface and prevent the film surface from being scratched and other quality defects. When the conventional positive bending tempering equipment is used for producing 'concave' bent tempered glass, the problem of Low-E surface scratch can occur when the Low-E surface is in contact with a roller way in a tempering furnace.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a production method of bent tempered glass with a Low-E surface capable of contacting with a roller way of a tempering furnace, which aims to solve the problem of scratching of the Low-E surface when the Low-E glass contacts with the roller way of the tempering furnace, and the technical scheme is as follows:
the invention provides a production method of bent tempered glass with a Low-E surface capable of contacting with a roller way of a tempering furnace, which comprises the following steps:
s1: cutting: cutting the Low-E large plate glass into a Low-E glass substrate;
s2: edging: edging and cleaning the cut Low-E glass substrate in the step S1;
s3: heating: placing the Low-E film of the Low-E glass substrate cleaned in the step S2 downwards in a toughening furnace and uniformly heating to the softening point temperature of glass within a preset target time, wherein the upper surface and the lower surface of the Low-E glass substrate are subjected to convection heating during heating, the upper part of a hearth of the toughening furnace adopts hot air circulation convection, and the lower part adopts compressed air convection;
during heating, the Low-E glass substrate has a static state and a moving state in a tempering furnace, and is in contact with a roller way after entering a hearth, and is in the static state within a preset first heating time until the Low-E glass substrate is in an unbent state; within a preset second heating time, the Low-E glass substrate is in a moving state, and the sum of the first heating time and the second heating time is equal to a target time;
s4: bending, tempering and forming: and (5) moving the heated Low-E glass substrate in the step (S3) to a bent air grid for processing to obtain Low-E bent toughened glass, wherein a Low-E film of the Low-E glass substrate is placed in a downward contact roller way.
Further, in step S3, the first heating time is 40% to 60% of the target time, and the second heating time is 40% to 60% of the target time.
Further, in step S3, heating the Low-E glass substrate within a preset first heating time, wherein the convection power range of the upper portion of the toughening furnace is set to 40% -60%, the temperature range of the upper heating furnace is set to 680 ℃ -700 ℃, and the heating power range of the upper heating wire is set to 60% -70%; the convection power range of the lower part of the heating furnace of the toughening furnace is set to be 20-30%, the temperature range of the lower part of the heating furnace is set to be 680-700 ℃, the power range of the lower heating wire is set to be 40-60%, and the temperature of the upper part of the heating furnace of the toughening furnace is more than or equal to that of the lower part of the heating furnace.
Further, in step S3, heating the Low-E glass substrate within a preset second heating time, wherein the convection power range of the upper portion of the toughening furnace is set to be 20% -30%, the temperature range of the upper heating furnace is set to be 680 ℃ -700 ℃, and the heating power range of the upper heating wire is set to be 60% -70%; the convection power range of the lower part of the heating furnace of the toughening furnace is set to be 20-30%, the temperature range of the lower part of the heating furnace is set to be 680-700 ℃, the power range of the lower heating wire is set to be 40-60%, the temperature of the upper part of the toughening furnace is more than or equal to that of the lower part of the heating furnace, and the temperature of the upper part of the toughening furnace is more than or equal to that of the lower part of the heating furnace.
Further, in step S1, the Low-E glass substrate has a thickness in a range of 5mm to 6 mm.
Further, in step S3, when the thickness of the Low-E glass substrate is 5mm, the target time range is 290S-320S; when the thickness of the Low-E glass substrate is 6mm, the target time range is 350s-370 s.
Further, in step S3, the Low-E glass substrate is oscillated back and forth at a speed of 80-120mm/S within an oscillation distance range of 800mm-1000mm during a preset second heating time.
Further, in step S3, the feeding speed range of the Low-E glass substrate into the toughening furnace is set to 50mm/S-100 mm/S.
Further, in step S2, the cut Low-E glass substrate is put into a horizontal edge grinding machine for edge grinding, and a belt used by the edge grinding machine is a soft belt; and during edging, the Low-E surface of the Low-E glass substrate is faced upwards for edging.
Further, in step S4, before the Low-E glass substrate enters the curved air grid, the upper curved air grid falls down, after the glass completely enters the curved air grid, the lower curved air grid arcs according to a preset height, after the arcing, the Low-E glass substrate is firstly cooled under the air pressure of 200 and 2500pa, the time range of the first cooling is set to be 40-80S, and then is cooled under the air pressure of 800 and 1500pa for the second time, the time range of the second cooling is set to be 80-160S, and finally the concave-arc curved toughened glass is obtained; the curved arc radius range of the concave arc curved toughened glass is set to be 1500mm-15000 mm.
The technical scheme provided by the invention has the following beneficial effects:
a. according to the production method of the bent toughened glass with the Low-E surface capable of contacting with the roller way of the toughening furnace, provided by the invention, the operation that the Low-E glass substrate stops moving when entering the toughening furnace is added, and meanwhile, the glass is ensured to be in a straight state after the glass is heated in a toughening furnace hearth for the first time through the adjustment and optimization of the heating temperature, the heating power and the heating convection, so that the quality defects of scratching, demoulding and the like of the finished concave arc bent toughened glass are avoided, and the problem that the Low-E surface is scratched when the concave type Low-E bent toughened glass is produced in the traditional toughening furnace is solved;
b. the production method of the bent tempered glass with the Low-E surface capable of contacting with the roller way of the tempering furnace, provided by the invention, has high production efficiency, and the scratches are not visible when the glass surface is observed, so that the bent tempered glass has no wave deformation;
c. the concave arc-bent toughened Low-E glass can be produced without purchasing equipment again, and the production cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a side view of a Low-E curved tempered glass provided by an embodiment of the present invention;
FIG. 2 is a side view of a Low-E glass substrate in contact with a roller bed at rest according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for producing bent tempered glass with a Low-E surface contactable to a roller way of a tempering furnace according to an embodiment of the present invention.
Wherein the reference numerals include: 1-Low-E glass substrate, 11-Low-E surface, 12-glass surface and 3-roller way.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
In an embodiment of the present invention, a method for producing a bent tempered glass with a Low-E surface capable of contacting a roller way of a tempering furnace is provided, and a specific flow chart is shown in fig. 3, which includes the following steps:
s1: cutting: cutting the Low-E large plate glass into a Low-E glass substrate, wherein the thickness range of the Low-E glass substrate is 5mm-6 mm;
s2: edging: edging and cleaning the cut Low-E glass substrate in the step S1, wherein a horizontal edging machine is adopted for edging, and a belt used by the edging machine is a soft belt; when edging, the Low-E surface of the Low-E glass substrate is faced upwards for edging; the cleaning machine is adopted for cleaning.
S3: heating: and (4) downwards placing the Low-E film of the Low-E glass substrate cleaned in the step (S2) into a toughening furnace, and uniformly heating the Low-E film to the softening point temperature of the glass within a preset target time, wherein convection heating is carried out on the upper surface (glass surface) and the lower surface (Low-E surface) of the Low-E glass substrate during heating, the upper part of a hearth of the toughening furnace adopts hot air circulation convection, and the lower part adopts compressed air convection.
When heating, the Low-E glass substrate has a static state and a moving state (the moving is swinging, the swinging refers to that a motor drives a roller way (preferably a ceramic roller) to rotate through a belt, the motor positively rotates and reversely rotates, so the roller way can also forwardly or backwardly rotate, the glass is on the roller way, and the roller way drives the glass to reciprocally swing in a toughening furnace hearth, after the Low-E glass substrate enters the furnace hearth, the Low-E glass substrate is in the static state within a preset first heating time, and referring to fig. 2, until a plane of the Low-E glass substrate, which is in contact with the roller way, is in a flat state; and in a preset second heating time, the Low-E glass substrate is in a moving state, and the sum of the first heating time and the second heating time is equal to the target time.
Specifically, the Low-E glass substrate is heated within a preset first heating time, and the convection power range of the upper part of the toughening furnace is set to be 40% -60%, preferably 50%; the temperature range of the upper heating furnace is set to be 680-700 ℃, and is preferably 690 ℃; the heating power range of the upper heating wire is set to be 60-70%, and preferably 65%; the convection power range of the lower part of the heating furnace of the toughening furnace is set to be 20-30%, the temperature range of the lower part of the heating furnace is set to be 680-700 ℃, the power range of the lower heating wire is set to be 40-60%, and the temperature of the upper part of the heating furnace of the toughening furnace is more than or equal to that of the lower part of the heating furnace.
Heating the Low-E glass substrate within a preset second heating time, wherein the convection power range of the upper part of the toughening furnace is set to be 20-30%, the temperature range of the upper heating furnace is set to be 680-700 ℃, and the heating power range of the upper heating wire is set to be 60-70%; the convection power range of the lower part of the heating furnace of the toughening furnace is set to be 20-30%, the temperature range of the lower part of the heating furnace is set to be 680-700 ℃, the power range of the lower heating wire is set to be 40-60%, the temperature of the upper part of the toughening furnace is more than or equal to the temperature of the lower part of the heating furnace, the sum of the first heating time and the second heating time is equal to the target time.
In step S2, convection bellows are used for convection heating, and 6 convection bellows are arranged on the top of the tempering furnace. Each convection air box corresponds to a 5.5KW fan, the rotating speed is controlled to be 1000-1400r/min, a plurality of heating wires are distributed in front of the fan, the fan is used for transmitting heat generated by the heating wires to glass, and each heating wire is 2250W and used for generating a heat source; the rotating speeds of the fans are all set to be the same; hot air is blown to the glass surface by a convection fan. A compressed air pipeline is arranged at a position 250mm below the ceramic roller ways of the hearth and is arranged between every two adjacent ceramic roller ways, small holes of 2mm are formed in the pipeline, and compressed air enters the tempering hearth through the small holes, so that the upper space and the lower space of the glass substrate form gas convection.
During heating, the Low-E glass substrate has a static (non-swing) state and a moving (swing) state in a tempering furnace, and is in the static state within a preset first heating time after entering a hearth; and in a second heating time after the first heating time, the Low-E glass substrate is in a moving state.
The Low-E glass substrate 1 is provided with a Low-E surface 11 and a glass surface 12 which are oppositely arranged, the glass surface is the outside of a room, the Low-E surface 11 is directly contacted with a roller way 3, the roller way is a silicon roller, the concave arc-shaped tempered glass prepared by the preparation method provided by the invention is curved, the side edge in the width direction is arc-shaped, the glass surface of the concave arc-shaped tempered glass faces upwards, and the glass surface and the Low-E surface of the concave arc-shaped tempered glass are both concave, see fig. 1.
The invention aims to solve the problem of Low-E surface scratch, and increases the operation that the Low-E glass substrate stops moving when entering a toughening furnace, namely, the glass is in a static (non-swing) state in the early stage (the first heating time) in a toughening furnace, and the glass is ensured to be in a non-bending (flat) state (the non-bending state refers to that the glass is not bent when being observed by naked eyes, and refers to relative flatness) after being heated in the toughening furnace by adjusting the heating temperature, the heating power and the heating convection, and the specific reason is as follows: after the Low-E glass substrate enters the hearth, the glass does not swing in the early stage (first heating time), the glass and the roller way are relatively static and do not generate relative displacement, and at the moment, because the heat absorption rates of the Low-E surface and the glass surface are different, according to the principle of expansion with heat and contraction with cold, the glass surface can be bent towards the Low-E surface, at the moment, the edge part of the glass is contacted with the roller way in the tempering furnace, the contact area is small, the stress of the contact point is large due to the influence of gravity, in the non-swing stage, three heating modes of heat conduction, heat convection and heat radiation exist on the two surfaces of the Low-E glass substrate, and as the glass surface absorbs heat quickly and is heated at high temperature, the Low-E surface absorbs heat slowly and is heated at Low temperature, the heat of the glass surface can be transferred to the Low-E surface in a heat conduction mode, when heated to a certain degree, the two faces of the Low-E glass will have the same temperature, and the glass is in an unbent state. In the second heating time after the first heating time, the glass begins to swing, the contact area of the glass and a hearth roller way of the toughening furnace is increased, the stress of the contact point is reduced, the glass can be prevented from generating relative displacement along with the swing of the roller way to the maximum extent, and the quality defects of scratching, demoulding and the like of the finished concave arc bent toughened glass are avoided.
The glass is static (does not swing) in the first heating time in the toughening furnace chamber, the glass and the roller table are static relatively and do not generate relative displacement, the glass cannot be scratched, the glass enters the toughening furnace in a straight state, the glass can be bent in the heating process, the glass is ensured to be in the non-bending (straight) state after the first heating time in the toughening furnace chamber through the adjustment of heating temperature, heating power and heating convection, and the film surface scratch caused by the bending of the glass is prevented; and then the glass begins to swing within a second heating time after the first heating time, the later-stage swinging speed and the swinging distance are reduced, the glass is always in an unbent (flat) state, the scratch problem of the Low-E surface can be well solved, the scratch is generated because the glass is bent, the edge part is bent downwards and contacts with a ceramic roller way, the straight back edge part of the glass is not bent downwards, the stress of the position contacting with a ceramic roller is reduced, and the scratch is not generated.
If the glass does not swing all the way through the tempering furnace, the following disadvantages are caused: 1) the production efficiency is too low; 2) the glass is an amorphous solid with an irregular structure, the tempered glass needs to be heated to the softening point temperature of common float glass, the glass is softened at the moment, the glass is influenced by gravity at the moment, and when the glass does not swing, the part of the glass, which is not in contact with a roller way, sinks to form wave deformation. Therefore, the glass starts to swing in the second heating time after the first heating time, so that the efficiency can be improved, and the glass can be prevented from being waved and deformed.
If the glass is oscillated in the tempering furnace all the time according to the conventional manufacturing method, there are disadvantages as follows: because two surfaces (a glass surface and a Low-E surface) of the Low-E glass absorb heat differently in the toughening heating process, the glass surface absorbs heat faster than the Low-E surface, and the glass bends downwards in a toughening furnace. If glass normally swings after entering the hearth, the edge of the glass is in contact with the inner track of the tempering hearth, the contact area is small, the contact point of the edge of the glass and the roller way is stressed to be enlarged due to the influence of gravity, the glass and the roller way can generate relative displacement, and the bent tempered glass finished product has quality defects of Low-E surface scratch, demoulding and the like.
The first heating time accounts for 40-60%, preferably 50%, of the target time, and as can be seen from multiple operations, in the initial heating, the glass is stationary, when the glass is in a non-bent state, the first heating time accounts for 50% of the target time, and in the remaining time of the target time, the first heating time is the second heating time, and the second heating time accounts for 40-60%, preferably 50%, of the target time.
The preset target time is related to the thickness of the Low-E glass substrate and is specifically related to the following steps: when the thickness of the Low-E glass substrate is 5mm, the target time range is 290-320 s; when the thickness of the Low-E glass substrate is 6mm, the target time range is 350s-370 s.
In step S3, the Low-E glass substrate swings back and forth at a speed of 80-120mm/S within a swing distance range of 800mm-1000mm within a preset second heating time, and if not within this range, the Low-E surface scratch of the Low-E glass substrate is more obvious.
In step S3, the feeding speed of the Low-E glass substrate into the toughening furnace is set to be in the range of 50mm/S-100mm/S, and if the speed is too high, the Low-E surface scratch of the Low-E glass substrate is affected.
S4: and moving the Low-E glass substrate heated in the step S3 to a bent air grid for arc bending to obtain Low-E bent toughened glass, wherein a Low-E film of the Low-E glass substrate is placed in downward contact with a roller way. When the curved arc is processed, the curved air grid of the toughening furnace needs to be bent upwards, the bending height is set according to the actual required curved arc radius of the curved toughened glass, and the specific implementation process is as follows: the Low-E glass substrate enters the front of the curved air grid for 20s, the upper curved air grid falls down, after the glass completely enters the curved air grid, the lower curved air grid arcs according to the preset height (the arc-striking height is related to the curved arc radius), after the arc-striking, the Low-E glass substrate is firstly cooled under the air pressure of 200 and 2500Pa (preferably 1200Pa) for the first time, the time range of the first cooling is set to be 40-80s (preferably 50s), then the Low-E glass substrate is secondly cooled under the air pressure of 800 and 1500Pa (preferably 1000Pa), the time range of the second cooling is set to be 80-160s (preferably 110s), and finally the concave arc curved toughened glass is obtained. The curved arc radius range of the concave arc curved toughened glass is set to be 1500mm-15000 mm.
The curved arc glass prepared by the production method of the curved toughened glass with the Low-E surface capable of contacting with the roller way of the toughening furnace has the following properties: scratching and pocking mark defects can not be seen through transmission vertical observation outside 1500mm under natural light conditions; no visible crack, unfilled corner and edge breakage defect exist; there is no band-like optical distortion.
If the Low-E glass substrate does not swing within the preset target time after entering the hearth of the toughening furnace, the production efficiency is too Low, the curved arc forming comparison test is carried out on the glass (such as 5mm and 6mm) with the same thickness under the same condition, the objects are the curved arc glass (swinging all the time in the toughening furnace) prepared by the traditional production method, the glass not swinging in the heating furnace and the curved arc glass prepared by the preparation method provided by the invention, the comparison test parameters are the total time required by heating in the toughening furnace, and the glass does not enter the curved air grid, namely the total time between entering the toughening furnace and not entering the curved air grid, and the test is respectively carried out on the glass with two thicknesses, which is detailed in table 1.
TABLE 1
As can be seen from the above table, if according to the conventional production method, the scratches on the glass surface were observed to be obviously yellowish; if the glass does not swing in the tempering furnace all the time, the heating time is long, the production efficiency is low, and the glass can generate wave deformation; if the preparation method provided by the scheme is adopted, the production efficiency is high, scratches cannot be seen when the glass surface is observed, and wave deformation does not exist.
According to the production method of the bent toughened glass with the Low-E surface capable of contacting with the roller way of the toughening furnace, provided by the invention, the operation that the Low-E glass substrate stops moving when entering the toughening furnace is added, and meanwhile, the glass is ensured to be in a straight state after the glass is heated in a toughening furnace hearth for the first time through the adjustment and optimization of the heating temperature, the heating power and the heating convection, so that the quality defects of scratching, demoulding and the like of the finished concave arc bent toughened glass are avoided, and the problem that the Low-E surface is scratched when the concave type Low-E bent toughened glass is produced in the traditional toughening furnace is solved; the production method of the bent tempered glass with the Low-E surface capable of contacting with the roller way of the tempering furnace, provided by the invention, has high production efficiency, and the scratches are not visible when the glass surface is observed, so that the bent tempered glass has no wave deformation; the concave arc-bent toughened Low-E glass can be produced without purchasing equipment again, and the production cost is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
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| CN119874172A (en) * | 2025-01-06 | 2025-04-25 | 咸宁南玻节能玻璃有限公司 | Processing method for relieving stress spots of toughened glass |
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| CN103274585A (en) * | 2013-05-13 | 2013-09-04 | 天津南玻节能玻璃有限公司 | Processing method for rapidly tempering low-e glass |
| CN104291671A (en) * | 2014-09-03 | 2015-01-21 | 宁波市合鑫玻璃科技有限公司 | Production process for LOW-E incurved toughened glass |
| CN104513001A (en) * | 2013-09-26 | 2015-04-15 | 青岛市首胜实业有限公司 | LOW-E glass toughening method |
| CN104860524A (en) * | 2015-04-08 | 2015-08-26 | 东莞南玻工程玻璃有限公司 | Transmission Speed Adjustment Method for Ceramic Roller Table Applicable to Tempering Furnace |
| CN106242259A (en) * | 2016-08-05 | 2016-12-21 | 浙江南晶玻璃科技股份有限公司 | A kind of preparation technology of the curved laminated glass of Low e |
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| FI110866B (en) * | 2000-08-28 | 2003-04-15 | Tamglass Ltd Oy | Method for heating LowE glass sheets in a curing kid |
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| CN103274585A (en) * | 2013-05-13 | 2013-09-04 | 天津南玻节能玻璃有限公司 | Processing method for rapidly tempering low-e glass |
| CN104513001A (en) * | 2013-09-26 | 2015-04-15 | 青岛市首胜实业有限公司 | LOW-E glass toughening method |
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| CN104860524A (en) * | 2015-04-08 | 2015-08-26 | 东莞南玻工程玻璃有限公司 | Transmission Speed Adjustment Method for Ceramic Roller Table Applicable to Tempering Furnace |
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