CN1676481A - vacuum glass edge heating method and vacuum glass made thereby - Google Patents
vacuum glass edge heating method and vacuum glass made thereby Download PDFInfo
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- CN1676481A CN1676481A CNA2004100298962A CN200410029896A CN1676481A CN 1676481 A CN1676481 A CN 1676481A CN A2004100298962 A CNA2004100298962 A CN A2004100298962A CN 200410029896 A CN200410029896 A CN 200410029896A CN 1676481 A CN1676481 A CN 1676481A
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- braze
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- 239000011521 glass Substances 0.000 title claims abstract description 112
- 238000010438 heat treatment Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000005341 toughened glass Substances 0.000 claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 230000005855 radiation Effects 0.000 claims description 11
- 238000005496 tempering Methods 0.000 claims description 10
- 238000010010 raising Methods 0.000 claims description 4
- 239000005329 float glass Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 11
- 238000001816 cooling Methods 0.000 abstract description 10
- 238000002844 melting Methods 0.000 abstract description 8
- 230000008018 melting Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 3
- 238000005219 brazing Methods 0.000 abstract 2
- 229910001120 nichrome Inorganic materials 0.000 description 15
- 230000000740 bleeding effect Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000007507 annealing of glass Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000005357 flat glass Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000002419 bulk glass Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
This invention discloses a method adopting edge heating technology to make vacuum glass (including multi-layered vacuum glass). It heats the whole body of the glass to be made to the set temperature (such as 300deg.C), then only heats the edge sealing area to the brazing materials melting point (450deg.C) for short time, and carries out cooling, exhaustion and sealing after the sealing of the brazing materials to heat the non-edge area of the glass to about 300deg.C. The toughened intensity of toughened vacuum glass adopting this invention also meets the standard of toughened or semi-toughened glasses.
Description
Technical field
The present invention relates to the manufacture method of vacuum glass.More particularly, the vacuum glass that relates to the edge heating means in a kind of vacuum glass (comprising multi-layer vacuum glass) manufacturing and adopt this method to make.
The existence of vacuum layer makes vacuum glass compare with traditional sheet glass at aspects such as heat-and sound-insulatings in the vacuum glass the progress of essence.
The typical structure of vacuum glass is promptly placed the miniature upholder 2 according to certain geometrical rule arrangement that satisfies the mechanics requirement as shown in Figure 1 between two sheet glass 1, nationality is to form the wall 4 of vacuum.Periphery carries out vacuum suction and seals the back forming vacuum heat-insulating layer by aspirating hole 3 with 6 sealings of low melting glass braze.Operation with low melting glass braze seal perimeter is the process of a first heat temperature raising postcooling cooling, the process of its edge sealing and the visible China Patent No. ZL02256440.3 of concrete working method, ZL95108228.0, the specific descriptions in the patent documentations such as ZL94192667.2.
From the description of above-mentioned prior art, as can be known, be a requisite important procedure in the vacuum glass manufacturing processed with the operation of low melting glass braze seal perimeter.Because edge sealing, the low melting glass braze fusing point that seals are about 450-500 ℃, so traditional working method will be heated to the monolithic glass prefabricated component above-mentioned 450-500 ℃ temperature, carry out vacuum exhaust after the cooling again.Such production technique is that the production cycle is long, and energy consumption is big, cost height, and glass deformation.Even more serious is that toughened glass annealing will take place after the long-time heating under said temperature and loses the tempering characteristic.
As shown in Figure 2, toughened glass is as heating 1 hour at 450 ℃, and retained strength will drop to about below 40%.Therefore above-mentioned technology can not be used to adopt former manufacturing of toughened glass " toughened vacuum glass ".But actual situation is, most of modern architecture and insulation bin all require glass safe in utilization, and toughened glass is the important kind of shatter proof glass.Owing to adopt existing production technology can not make " toughened vacuum glass ", so that the use range of vacuum glass is very limited.
Summary of the invention
An object of the present invention is to provide the novel method of a kind of manufacturing vacuum glass (comprising multi-layer vacuum glass), can overcome the above-mentioned defective in the prior art, can be when realizing intact edge sealing, keep the tempering intensity of toughened glass to greatest extent, thereby produce " toughened vacuum glass ".The present invention also can enhance productivity and save energy greatly as being used for the conventional vacuum glass production.
Basic design of the present invention is to adopt the edge heating technique, promptly after integral body is heated to design temperature (as 300 ℃) in advance whole vacuum glass, only the edge is sealed the zone short period of time and be heated to scolder melting temperature (as 450 ℃), can lower the temperature after treating to finish, make the most non-fringe region of glass only be heated to about 300 ℃ as the braze sealing by fusing of joint filling material.From Fig. 2 as seen, be heated in the short period of time under 300 ℃ the situation, toughened glass still can keep original surface stress of about 90%, promptly still has enough tempering intensity.
In fact, the surface stress permissible value of toughened glass can be up to 140MPa, and China cladding glass standard GB17841-1999 regulation stress range is: toughened glass is greater than 95MPa, half tempered glass 24-69MPa.Therefore, adopt above-mentioned edge heating technique, as long as select former of the suitable toughened glass of surface stress, and choose the temperature and time of center and peripheral heating, just can produce the vacuum glass that surface stress meets above-mentioned toughened glass or half tempered glass standard as required.
The inventor proves in experiment that also the central part and the edge of former of high-quality float glass can tolerate the 100-150 ℃ of temperature difference in 200 ℃ to 400 ℃ scopes, the scope that toughened glass can tolerate the temperature difference can reach 250-320 ℃, so, will can not cause and break as long as the temperature difference that is added the margin and center position of thermosetting by the edge is controlled in the suitable scope.This is another feasible foundation of the present invention.
According to an aspect of the present invention, provide a kind of edge heating means of toughened vacuum glass, comprising: place the step of low melting glass braze, at the marginal position that braze is placed on the toughened vacuum glass preform; Whole heating steps integrally heats this toughened vacuum glass preform and is incubated about 300 ℃; The edge heating steps for the further independent rapid heating in the edge that is placed with braze, makes this braze reach and melts the also temperature (as 450 ℃) of sealed vacuum glass edge.
The tempering intensity of the toughened vacuum glass of Zhi Zaoing will still can reach the standard of toughened glass or half tempered glass according to the method described above, thereby has overcome that tempering intensity in the prior art significantly reduces and the defective that loses the tempering characteristic.
More particularly, according to above-mentioned vacuum glass edge heating means, wherein said further independent heating is to realize by the heating power that is laid in the in-built electrical heated filament in the said braze to the edge.
In addition, according to the edge heating means of above-mentioned vacuum glass, in the wherein said edge heating steps for the edge that is placed with braze further separately heating also can realize by the thermal radiation of the pyrotoxin placed near said braze.
Only as an example and not as restrictedly, the pyrotoxin that above-mentioned close said braze is placed can be an infrared lamp.
In addition, can adopt several different methods to put into practice the edge heating means of above-mentioned vacuum glass, for example adopt the high-frequency induction edge to implement heating steps, heat separately for the edge that is placed with braze, perhaps the mode by the Electric radiant Heating Film heating realizes heating separately for the edge that is placed with braze.
The present invention also provides the vacuum glass by adopting above-mentioned different methods to make.These vacuum glass can be identical or different with the vacuum glass that traditional heating mode is made on surface structure, for example, the above-mentioned nichrome wire type of heating and the type of heating of high-frequency induction can stay nichrome wire or radio-frequency induction coil in the braze of solidifying, and that the type of heating of above-mentioned radiation and Electric radiant Heating Film can be implemented in appearance the vacuum glass made from traditional heating mode is identical, but the substantial characteristics that the vacuum glass that the method for these edge heating is made has are that its tempering intensity still can reach the standard of toughened glass formula half tempered glass.
This be because, when the method that adopts above-mentioned edge to heat heats, the temperature of glass plate edge is far above the temperature at middle part, and when vacuum glass is made in the braze thawing that edge is placed, keep its centre portions to be in relative low-temperature condition, and to guarantee after cooling to form the edge be not destructive stress to the stress of central part.
The advantage of edge heating is tangible:
After whole prefabricated component reaches design temperature, only, energy consumption and production cycle are reduced greatly, thereby also reduced cost accounting for the total area less than 1/10th edge short-term heat temperature raising, reduced glass deformation.
The bending strength of toughened glass, resistance to impact shock and allowable deflection are the several times of simple glass, can be used for the field that Highrise buildings etc. requires high strength and high security, the edge heating makes the making toughened vacuum glass become possibility, has expanded the Application Areas of vacuum glass greatly.
Below by accompanying drawing embodiments of the invention are described: wherein
Fig. 1 is the exemplary block diagram of vacuum glass;
1 is last lower glass plate among the figure; 2 is upholder; 3 is aspirating hole; 4 is the vacuum space interlayer; 5 for helping the envelope glass bar; 6 is the low melting glass braze;
Fig. 2 is toughened glass annealing curve figure;
Fig. 3 adopts the in-built electrical heated filament to carry out the synoptic diagram of the method for edge heating; 7 is the in-built electrical heated filament among the figure;
Fig. 4 adopts thermal radiation to carry out the synoptic diagram of the method for edge heating.
8 is radiant heating source among the figure
The implementation step of the edge heating means of manufacturing vacuum glass of the present invention is described below particularly.
With reference to Fig. 3 the following process that employing in-built electrical heated filament carries out the method for edge heating is described, wherein adopt traditional technology and equipment, monoblock vacuum glass prefabricated component is finished, promptly as seen from the figure, between two dull and stereotyped toughened glass, laid upholder, setting completed for bleeding point, and form the vacuum glass work in-process that close sheet up and down in peripheral dusting.
Subsequently, the staggered platform at the edge of the above-mentioned vacuum glass preform that closes sheet up and down or on fill out in lower glass plate 1 and the groove that helps envelope glass bar 5 to form and put braze 6, and one/evenly distributed several (being two among the figure) nichrome wire 7 of the appropriate location lay in this braze, nichrome wire 7 is around the edge of this vacuum glass preform, but not short circuit.
Subsequently, above-mentioned lay evenly be warming up to about 300 ℃ around the vacuum glass preform integral body of nichrome wire 7.
Subsequently, stop to heat up then, and adopt external source, till making that braze 6 around this nichrome wire 7 is melted fully said nichrome wire 7 energising heat temperature raisings for the whole evenly insulation of above-mentioned preform.
Stop energising heating subsequently, make whole vacuum glass preform cooling cool off for nichrome wire.
Treat that limit portion temperature reduces to after braze begins to solidify, to preform carry out exhaust, seal, subsequent operations such as cooling, finally make vacuum glass.
More particularly, the nichrome wire that nichrome wire shown in Figure 3 carries out adopting in the method for edge heating is the φ 0.1-0.3mm nichrome wire of the coefficient of expansion near soda-lime glass, overcoat φ 1mm glass fiber hose, around glass periphery step one circle, paste glass braze on the cloth then, expose at the nichrome wire two ends, connects low-voltage power supply.Sealing part is compressed in the powder circle of glass braze with same nichrome wire, is enclosed within on the extraction pipe, and the nichrome wire two ends also connect low-voltage power supply.When the temperature of vacuum glass heats stove is raised to preset temperature as 300 ℃, start the low-voltage power supply of above-mentioned nichrome wire, when edge and bleeding point place temperature were raised to braze temperature of fusion (as 450 ℃), subsequent handlings such as vacuumizing and seal was finished in the outage cooling in temperature-fall period.
With reference to Fig. 4 the following process that the method for edge heating is carried out in the employing thermal radiation is described, wherein adopt traditional technology and equipment, monoblock vacuum glass prefabricated component is finished, promptly as seen from the figure, between two dull and stereotyped toughened glass, laid upholder 2, setting completed for bleeding point 3, and form the vacuum glass work in-process that close sheet up and down at peripheral cloth powder 6.
Subsequently, in the staggered platform or the upper glass plates at the above-mentioned half-finished edge of vacuum glass that closes sheet up and down and the groove that helps the envelope glass bar to form, fill out and put braze.
Subsequently, above-mentioned vacuum glass preform integral body evenly is warming up to about 300 ℃.
Subsequently, stop to heat up and evenly being incubated, and adopt the braze 6 of 8 pairs of said peripheries of another radiant heating source to carry out radiation heating, till braze is melted fully for above-mentioned preform whole implementation.
Stop radiation heating subsequently, make whole vacuum glass preform cooling cool off braze.
Treat that limit portion reduces to after braze begins to solidify, to preform find time, seal, subsequent operations such as cooling, finally make vacuum glass.
What more particularly, thermal radiation mode shown in Figure 4 carried out adopting in the method for edge heating is infrared radiation heater 8.When the temperature of vacuum glass heats stove is raised to preset temperature as 300 ℃, connecting described infrared radiation heater 8 heats, with radiation heater 8 direct braze 6 over against the vacuum glass edge, when edge and bleeding point place temperature are raised to braze temperature of fusion (as 450 ℃), subsequent handlings such as vacuumizing and seal is finished in the outage cooling in temperature-fall period.
Above-mentioned edge heating method is produced toughened vacuum glass has two kinds to join sheet mode: the first " simple glass+toughened glass ", the method of its manufacture method and conventional vacuum glass is basic identical, the technology point of unique GPRS is to determine (≤350 ℃ of peak temperature rises according to toughened glass annealing curve (as Fig. 2), low more good more), the time that stops under top temperature is short more good more, and is general≤0.5 hour.It two is " toughened glass+toughened glass ", this all steel vacuum glass can bear the bigger temperature difference, therefore the temperature of bulk glass can be lower when guaranteeing edge sealing, sealing temperature～450 ℃, as 200-250 ℃, but simultaneously in time that this warm area stops also proper extension, and the intensity of toughened glass reduces seldom.
Can determine the variation of toughened glass intensity and the quality of effective control product by the surface stress of measuring toughened vacuum glass centre portions and edge section.
Adopt the vacuum glass of above-mentioned edge heating means manufacturing to overcome the defective of prior art, use the tempering intensity of the vacuum glass that toughened glass makes still can reach the standard of toughened glass or half tempered glass.Can satisfy the service requirements of most of modern architecture and insulation bin to shatter proof glass.Therefore, " toughened vacuum glass " made by method of the present invention makes the use range of vacuum glass be greatly expanded.Present method is applicable to the manufacturing of the conventional vacuum glass that float glass constitutes too.
Claims (6)
1. the edge heating means of a toughened vacuum glass (comprising multi-layer vacuum glass) are characterised in that to comprise:
Place the step of glass braze, at the marginal position that braze is placed on the toughened vacuum glass preform;
Whole heating steps integrally is heated to design temperature (as 300 ℃) to this toughened vacuum glass preform, stops integral body to the vacuum glass preform then and heats up and be incubated; And the edge heating steps, carry out independent heat temperature raising for the edge that is placed with braze, make this braze reach and melt and the temperature (as 450 ℃) of sealed vacuum glass edge.
Lower the temperature, exhaust, subsequent operations such as seal for product subsequently, finally make toughened vacuum glass (comprising the tempering multi-layer vacuum glass) it is characterized in that the toughened vacuum glass of finished product still can reach the standard of toughened glass or half tempered glass.
2. according to the edge heating means of the toughened vacuum glass of claim 1, it is characterized in that said edge heating steps promptly heats separately for the edge that is placed with braze and is by the heating power that is laid in the in-built electrical heated filament in the said braze realized.
3. according to the edge heating means of the toughened vacuum glass of claim 1, it is characterized in that said edge heating steps promptly heats separately for the edge that is placed with braze and is to realize by the external well heater of placing near said braze.
4. according to the edge heating means of the toughened vacuum glass of claim 4, it is characterized in that the said well heater of placing near this braze can be an infrared radiation heater.
5. the toughened vacuum glass that uses aforesaid right to require the edge heating means of one of any toughened vacuum glass of 1-4 to make is characterized in that the tempering intensity of vacuum glass still can reach the standard of toughened glass or half tempered glass.
6. the method for claim 1 is equally applicable to the manufacturing of the conventional vacuum glass that is made of float glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100298962A CN100497222C (en) | 2004-04-01 | 2004-04-01 | Reinforced vacuum glass manufacture method and vacuum glass made thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100298962A CN100497222C (en) | 2004-04-01 | 2004-04-01 | Reinforced vacuum glass manufacture method and vacuum glass made thereby |
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| Publication Number | Publication Date |
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| CN1676481A true CN1676481A (en) | 2005-10-05 |
| CN100497222C CN100497222C (en) | 2009-06-10 |
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| CNB2004100298962A Expired - Fee Related CN100497222C (en) | 2004-04-01 | 2004-04-01 | Reinforced vacuum glass manufacture method and vacuum glass made thereby |
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-
2004
- 2004-04-01 CN CNB2004100298962A patent/CN100497222C/en not_active Expired - Fee Related
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