CN101050056A - New method and equipment for preparing vacuum glass faceplate - Google Patents
New method and equipment for preparing vacuum glass faceplate Download PDFInfo
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- CN101050056A CN101050056A CN 200610067121 CN200610067121A CN101050056A CN 101050056 A CN101050056 A CN 101050056A CN 200610067121 CN200610067121 CN 200610067121 CN 200610067121 A CN200610067121 A CN 200610067121A CN 101050056 A CN101050056 A CN 101050056A
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Abstract
This invention discloses novel method and apparatus for producing vacuum glass. The method comprises: producing isolated supporting points between glass panels and airtight sealing layers at the edges of glass panels by screen printing process, sealing the edges, exhausting, sealing the exhaust mouth, baking, examining, and framing. The softening temperature and thermal and mechanical properties of the low-melting-point glass used for isolated supporting points and airtight sealing layers, and the thickness of isolated supporting points should precisely match the thickness of airtight sealing layers. The exhaust and sealing apparatus comprises: a sealed vacuum chamber for fixing the surface of the vacuum glass panel with exhaust holes downward onto the sealing table, and a movable ejection pin with an electric heating device below the exhaust holes; or a bell jar with a sealing ring, and movable ejection pin with an electric heating device below the exhaust holes. After exhausting, the ejection pin heats the metal plate sintered with low-melting-point glass to the sealing temperature of the low-melting-point glass, and seals by tip layering onto the exhaust holes.
Description
Affiliated technical field
The present invention relates to a kind of novel method and device for preparing vacuum glass faceplate.Vacuum glass faceplate is meant between two or the multi-disc glass spaced staggered relatively, and a plurality of small isolation point of suppon arrays are set between sheet glass and sheet glass, through behind the exhaust sealing, form the vacuum tight cavity between sheet glass and the sheet, obtain a kind of heat insulation, transparent material that sound-proofing properties is excellent.Be used for a plurality of technical fields such as buildings, transportation means, cooling apparatus.In the manufacturing processed of vacuum glass faceplate, after the sealing-in of vacuum face glass surrounding portion is finished, need to get rid of the air in gap between sheet glass and the sheet glass and keep vacuum state, must carry out the exhaust hermetically sealed, the present invention relates generally to and isolates novel method and the hermetically sealed method and apparatus of venting port that point of suppon is made between the vacuum glass faceplate a kind of the preparation.
Background technology
At present, it is similar substantially to relate to the structure of vacuum glass in the technique known.Fig. 1 is typical vacuum glass structure, and A is a prebasal plate glass among Fig. 1; B is a metacoxa glass; C is the isolation point of suppon between sheet glass and the sheet glass; D represents the sealing layer of sealing-in prebasal plate glass A and metacoxa glass B; F is a venting hole.The cavity gap that forms between two sheet glass is a vacuum.
Exist in the known vacuum glass manufacturing technology and isolate point of suppon making and exhaust sealing two big crucial manufacture craft defectives:
The first, the defective of isolation point of suppon between the face glass
Between two or multi-disc glass, metal or high molecular isolation point of suppon C are set in the technique known, generally need place a diameter 0.5mm, the isolation point of suppon of the cylinder shape of high 0.2mm or other shape every 20-40mm.Sheet glass and sheet glass limit portion make the gap between sheet glass and the sheet glass be in vacuum state with low melting glass or organic adhesive sealing through sealing after the exhaust, make vacuum glass.
The vacuum glass that seals with low melting glass between sheet glass and the sheet glass, general with the isolation point of suppon of metal cylinder as vacuum glass, because glass surface unfairness and the not parallel and unfairness of isolation point of suppon metal cylinder upper and lower surface, the right cylinder that usually causes isolating support tilts, thereby make isolating points dislocation or with sheet glass between just some contact or the line contact, rather than contact by the face that design needs.The right cylinder dislocation of isolate supporting, some contact or line contact all will cause vacuum glass stress concentration and mechanical strength and work-ing life of directly breaking or reducing vacuum glass in manufacturing processed.
With the isolation upholder of macromolecular material as vacuum glass, because the upper limit temperature of heat tolerance of general macromolecular material is lower than 250 ℃, therefore, the sealing material of make isolating the sealing-in limit portion that the vacuum glass of upholder uses with macromolecular material generally can only be an organic adhesive.The vacuum glass of Zhi Zaoing in use produces tiny crack owing to organic adhesive is easy to reasons such as embrittlement or organic adhesive inherent aging blemiss in cold winter in this way, causes leaking gas and the effect of loss of vacuum glass.
In addition, no matter be the isolation upholder of metal or macromolecular material because it is not only thin but also many to isolate upholder, pile up time-consuming, fixing difficult, complex manufacturing technology.
The second, the defective of exhaust sealing technology
At present, relate to the exhaust sealing technology that forms vacuum cavity between the face glass in the technique known and mainly contain two kinds of methods: a kind of method as shown in Figure 2, in the side of panel or venting hole a position, corner with the low-melting-point glass glass exhaust tube b that diameter 1-10mm does not wait that is tightly connected, be connected to pumped vacuum systems c, make after the vacuum tightness of cavity reaches requirement between the face glass through gas barrier, make the vapor pipe termination melting sealed by electric heating or laser.Another kind method as shown in Figure 3, at venting hole a position, panel corner with the low-melting-point glass glass exhaust tube b that diameter 1-10mm does not wait that is tightly connected, with one have rubber seal c stainless steel bell jar type device d be buckled on the aspirating hole a of vacuum glass, be connected to pumped vacuum systems f with metal tube e, make after the vacuum tightness of cavity reaches requirement between the face glass through gas barrier, make the vapor pipe melt-sealed with electric heater unit g.
Adopt the vacuum panels of this method preparation all to use glass exhaust tube, Fig. 4 is to use the vapor pipe sealing-in to finish rear exhaust port shape synoptic diagram.C is the termination that stays after the vapor pipe fusion.Have the following disadvantages: the gas that (1) glass exhaust tube fusion produces reduces the vacuum tightness of panel; (2) the vapor pipe seal head that is retained in vacuum glass faceplate outside or end is except influencing product appearance, and in use also being caused breaking damaging by collision easily makes vacuum failure; (3) vapor pipe is long more, and diameter is thin more, and it is long more that exhaust reaches the time that needed vacuum tightness needs, and pumping efficiency is lower; (4) vapor pipe and panel connecting portion leak gas easily.
Summary of the invention
Isolate the aforementioned deficiency of point of suppon in order to overcome existing metal and macromolecular material as vacuum glass, and the defective that vapor pipe exhaust sealing technology is arranged, the present invention proposes novel method and the device that a kind of vacuum glass faceplate is made.
The vacuum glass faceplate making method that the present invention proposes comprises following key step:
1. with size cutting, edging, the cleaning on request of glass raw sheet.
2. making diameter with mechanical drill or laser-beam drilling machine on a glass sheets is the venting hole of 1-5mm, and this sheet glass is called prebasal plate glass, and correspondingly, another sheet glass is called metacoxa glass.
3. isolate point of suppon on glass making of metacoxa of method for printing screen.The non-crystalline type low-melting-point glass powder (afterwards being called low-melting-point glass powder A) and the organic solution that are slightly less than the thermal expansivity of face glass with thermal expansivity are mixed with the slurry that a kind of rheological is suitable for silk screen printing.Printing on the metacoxa glass B about diameter 0.5mm with method for printing screen then, the wet film idea of the about 30-250 μ of thickness m, each idea spacing distance is 20-100mm.Through on the glass substrate of back, forming isolation point of suppon as shown in Figure 5 behind super-dry, the sintering.
4. will be used for front glass substrate and the back glass substrate another kind of non-crystalline type low-melting-point glass powder (afterwards being called low-melting-point glass powder B) of sealing be mixed with can silk screen printing slurry, regulate the viscosity and the rheological of slurry, on the glass-based edges of boards of back with method for printing screen around print the wide about 5mm of one deck, the thick glass powder with low melting point slurry wet film of thick about 30-300 μ m.Through on sheet glass, forming the low melting glass rete that is used for seal glass edges of boards portion as shown in Figure 6 after the drying and sintering, abbreviate sealing layer as.
Front glass substrate and back glass substrate is superimposed face-to-face 5., the face of isolating point of suppon is promptly arranged and have the face of sealing layer staggered relatively.Getter is put near venting hole corner.Periphery with heat-resisting elastic mechanical clamp clamps face glass, anchor clamps will guarantee that the face glass periphery is stressed evenly, and be subjected to thermal softening isolating point of suppon and sealing layer, can continue maintenance during forward and backward glass substrate pitch smaller and give forward and backward glass substrate uniform pressure.Heat the sealing temperature that reaches the sealing layer of making of low-melting-point glass B through intermittent type electrical heater or grill-hearth travelling oven then, be generally 420-500 ℃, under this temperature, the isolation point of suppon of making of low-melting-point glass A sintering also can soften deformation under stressed effect.Sealing temperature at sealing layer kept 1-15 minute, evenly reduced to room temperature then.
One of step 3,4, key problem in technology of 5 are to make the low-melting-point glass powder A that isolates upholder and the difference of low-melting-point glass powder B material property.Low-melting-point glass powder A has similar thermomechanical property with low-melting-point glass powder B, here said thermomechanical property is meant: the sample behind the sintering is being subjected at the uniform velocity heating under the constant external force, behind the softening temperature of temperature greater than glass of sample, measure the deformation quantity in the heat-processed, be called hot mechanical paths with the deformation quantity curve that mapping obtains to temperature.Low-melting-point glass powder A and low-melting-point glass powder B have the hot mechanical paths of appearance similar separately at it more than the softening temperature, but two samples reach the temperature difference of identical deformation quantity, and low-melting-point glass powder A is higher more 3-40 ℃ than the temperature that low-melting-point glass powder B reaches identical deformation quantity.In addition, low-melting-point glass powder A is different with the glass softening point of low-melting-point glass powder B, and the softening temperature of low-melting-point glass powder A is higher approximately 3-40 ℃ than the softening temperature of low-melting-point glass powder B.Say with popular words, make the low-melting-point glass powder A that isolates point of suppon exactly and under sealing temperature, omit more firmly than the low-melting-point glass powder B that is used for sealing-in limit portion.Like this, guaranteeing that vacuum glass faceplate limit portion reaches under the prerequisite of hermetic seal, guaranteeing that each isolation point of suppon all has excellent contact with front glass substrate and back glass substrate, makes each isolation point of suppon stressed evenly.
Two of step 3,4,5 key problem in technology is the accurate couplings of making the height of the height of isolating upholder and sealing layer.By control silk screen printing parameter, the thickness of the sealing layer in the control chart 6 behind the sintering is than the low 1-10 μ m of thickness of the isolation upholder among Fig. 5.Like this, during two sheet glass sealings by fusing, under the pressure effect of anchor clamps, heat, make each isolate upholder when being subjected to thermal softening can both with two sheet glass excellent contact, isolate point of suppon like this and can play the good supporting effect, improve the yield rate and the mechanical strength of vacuum glass goods.
In addition, the gap between the known vacuum glass is about 0.2mm, and the present invention is owing to have only 20-250 μ m with the isolation support thickness of method for printing screen making and the sealing layer thickness of edge sealing.Reduced the gap between sheet glass and the sheet glass.
After the forward and backward glass substrate sealing-in of vacuum glass, the isolation point of suppon shape of formation as shown in Figure 7.By aforesaid method, making each isolate point of suppon all has excellent contact with forward and backward glass substrate, has improved the intensity and the good article rate of vacuum glass.
6. the sealing-in sheet of sealing venting port is made.Be mixed with the slurry that a kind of rheological is suitable for silk screen printing with non-crystalline type low-melting-point glass powder C and organic solution.The sealing temperature of this low-melting-point glass powder hangs down 10-80 ℃ than the sealing temperature of the low-melting sealing glass of sealing-in vacuum glass faceplate limit portion, and thermal expansivity is a little less than the thermal expansivity of face glass.Be that printing forms the slurry wet film on the thick tinsel of 0.2-2mm with method for printing screen at thickness then, see Fig. 8 and Fig. 9 through the pattern of super-dry, printing back formation behind 350-450 ℃ of sintering.Wherein, tinsel has been processed into the tangent thin slice of filled circles that diameter is 4-20mm earlier, and it is square also can be processed into (5-20) * (5-20) mm, and redundance hollow out is removed, and is separated into single sealing-in sheet after being convenient to print sintering.Fig. 8 forms diameter 3-15mm, the thick 15-250 μ m left and right sides solid low-melting-point glass rete synoptic diagram behind the printing sintering; A is a tinsel among the figure, and b is the low-melting-point glass rete that forms behind the sintering.Fig. 9 is that the formation width is 3-10mm behind the printing sintering, thick 15-250 μ m left and right sides ring-type low-melting-point glass rete synoptic diagram.A is a tinsel among the figure, and b is the low-melting-point glass rete that forms behind the sintering.Alloy slice among Fig. 8 and Fig. 9 is cut into the sealing-in sheet that single diameter is the 4-20mm circle.The sectional view of single sealing-in sheet is seen Figure 10 and Figure 11 respectively.The thermal expansivity of tinsel is close with the thermal expansivity of face glass.
7. the present invention proposes two kinds and does not use the exhaust mouth-sealing method of vapor pipe and the device that this exhaust-pipe-free of enforcement seals.
(1) Figure 12 is first kind of vacuum exhaust closing device disclosed by the invention, in a of enclosed vacuum chamber, b is the stainless steel pipes that connects vacuum chamber and air-bleed system c, with around the vacuum glass faceplate d overall fixed that finishes of edge sealing being positioned on the sealing-in worktable e of vacuum chamber, facing down of venting hole f arranged.50-300mm is a push rod g that can move up and down below venting hole f, and the material on push rod top can be the silica glass or the alumina-ceramic of hollow; Upper surface at push rod is the thick 1-3mm that is, diameter is the heat conductivility good metal sheet h of 8-30mm, can be copper or other alloy slice.Be electric heating device i under this tinsel, electric heater unit can be hot resistance, nichrome wire, mica heating piece, intermediate frequency or high-frequency electrical heating unit.The low-melting-point glass that is used to add process presintering on the heat sealing sheet reaches its sealing temperature.J is the sealing-in sheet, comprises metal and the low-melting-point glass that is sintered to fix on metal last slice.Note the strict alignment in center of venting hole f center, push rod g and sealing-in sheet j.
In a of enclosed vacuum chamber, utilize among a with electric heater unit vacuum glass faceplate and vacuum chamber are heated together, vacuumize simultaneously.A kind of mode is that whole vacuum chamber and vacuum panels are heated to the sealing temperature that sealing-in sheet j goes up low-melting-point glass, do not use the interior electric heater unit i of push rod g in 12, after meeting the requirements of vacuum tightness, the low-melting-point glass on the sealing-in sheet j reaches sealing temperature, is generally 380-450 ℃, by mechanism push rod g being risen is pressed on the venting hole f, keep withstanding venting hole under certain pressure, cooling after 0.5-5 minute is after temperature is lower than 250-300 ℃, unclamp push rod, be cooled to room temperature.The exhaust sealing process finishes.Another kind of mode is that whole vacuum chamber and vacuum panels are heated to 300-420 ℃, and this temperature is lower than the sealing temperature of low-melting-point glass on the sealing-in sheet, connects among Figure 12 electric heater unit i in the push rod g, heating be positioned at the push rod upper end sealing-in sheet j.After meeting the requirements of vacuum tightness, low-melting-point glass on the sealing-in sheet j reaches sealing temperature, be generally 380-450 ℃, by mechanism push rod g being risen is pressed on the venting hole f, keep withstanding venting hole under certain pressure, cooling after 0.5-5 minute is after temperature is lower than 250-300 ℃, unclamp push rod, be cooled to room temperature.The exhaust sealing process finishes.
(2) second kind of vacuum exhaust closing device disclosed by the invention seen Figure 13.It is that a threeway stainless steel bell jar a connects pumped vacuum systems c by stainless steel pipes b, the bell jar upper edge hole has heat-resistant rubber seal ring d, a push rod f that can move up and down is arranged in the stainless steel bell jar a, the material on push rod top can be the silica glass or the alumina-ceramic of hollow, and the bottom of push rod is a stainless steel tube; Upper surface at push rod is the thick 1-3mm that is, diameter is the heat conductivility good metal sheet g of 8-30mm, can be copper or other alloy slice.Be electric heating device h under this tinsel, electric heater unit can be hot resistance, nichrome wire, mica heating piece, intermediate frequency or high-frequency electrical heating unit.The low-melting-point glass that is used to add process presintering on the heat sealing sheet reaches its sealing temperature.I is the sealing-in sheet, comprises metal and the low-melting-point glass that is sintered to fix on tinsel.
The j vacuum glass faceplate of sealing the limit all around is placed on the k sealing-in worktable, the last housing l of electrically heated and temperature controlling system is arranged on the cover, heating makes vacuum glass faceplate reach 200-430 ℃; Put the sealing-in sheet i that has through the low-melting-point glass of presintering at push rod f upper surface, note venting hole center, circular bell jar center, push rod center and sealing-in sheet center-aligned.At this moment, the position, upper edge of push rod is apart from venting hole 50-300mm, and energising adds the heat sealing sheet, makes the low-melting-point glass on the sealing-in sheet i be heated to 350-430 ℃ of softening fusion, reaches the sealing temperature of low-melting-point glass.After vacuum tightness in vacuum glass faceplate reaches requirement, by mechanism push rod is risen and be pressed on the venting hole, keep withstanding venting hole under certain pressure, cooling after temperature is lower than 250-300 ℃, is unclamped push rod after 0.5-5 minute, is cooled to room temperature.The exhaust sealing process finishes.
The difference of second kind of device and first kind of device: first kind of device is that whole vacuum chamber is vacuumized, and to be exhaust system vacuumize with the exhaust that directly links to each other of the venting port of vacuum glass faceplate for second kind of device, do not need first kind of vacuum chamber in the device.
Figure 14 is the diagrammatic cross-section that adopts sealing-in sheet sealing-in final vacuum shown in Figure 8 hole site, and Figure 15 is the diagrammatic cross-section that adopts sealing-in sheet sealing-in final vacuum shown in Figure 9 hole site.A is a venting hole among the figure, and b seals the back low-melting-point glass, and c is the tinsel on the sealing-in sheet.Figure 14 forms the structure that is similar to rivet type, compares with the technological method that vapor pipe is arranged, and has improved sealing strength, has reduced the gas leakage probability.In addition, the structure that forms after two kinds of sealing-ins of Figure 14 and Figure 15 has overcome has the outstanding position of vapor pipe to damage easily and macroscopic irregularity.
8. make vacuum tightness in the air-breathing further raising vacuum glass faceplate of the getter that is placed on panel venting hole edge with ratio-frequency heating.
9. detect the performance of vacuum glass, install plastics or plastic-steel frame after meeting the requirements additional, obtain qualified vacuum glass faceplate goods.
The invention has the beneficial effects as follows, isolating aspect the point of suppon making, compare with known vacuum glass manufacturing technology and have the following advantages: (1) adopts method for printing screen to make, and improves the make efficiency of isolating point of suppon; (2) can play the good supporting effect owing to isolate point of suppon, improve the yield rate and the mechanical strength of vacuum glass goods; (3) reduced gap between sheet glass and the sheet, follow-up vacuumizing and exhausting activity time is shortened, enhanced productivity.Reduced the thickness of vacuum glass faceplate simultaneously.
In addition, aspect the exhaust sealing process, compare, do not adopt vapor pipe with known vacuum glass manufacturing technology.It is following not enough that the vacuum glass faceplate that adopts the present invention to produce can overcome existing vacuum glass faceplate manufacturing technology: the gas that (1) glass exhaust tube fusion produces reduces vacuum tightness; (2) vapor pipe that is retained in the vacuum glass faceplate outside is except influencing product appearance, and in use also breaking easily to damage makes product failure; (3) vapor pipe is long more, and diameter is thin more, and it is long more that exhaust reaches the time that needed vacuum tightness needs, and pumping efficiency is lower; (4) vapor pipe and panel connecting portion leak gas easily.
Therefore, under the identical prerequisite of other condition, compare with the vacuum glass faceplate of known manufacturing technology preparation, the vacuum glass faceplate mechanical property that adopts the present invention to make is better, and thickness is thinner, and vacuum tightness is higher, venting port is more attractive in appearance.
Description of drawings
Fig. 1 is typical vacuum glass structural representation, and A is a prebasal plate glass among the figure, and B is a metacoxa glass, and C is the isolation point of suppon between sheet glass and the sheet glass, and D represents the sealing layer of sealing-in prebasal plate glass A and metacoxa glass B, and F is a venting hole.
Fig. 2 is known use vapor pipe sealing method synoptic diagram.A is a prebasal plate glass among the figure, and B is a metacoxa glass, and a is the venting hole that is positioned at the corner of panel, and b is that c is a pumped vacuum systems with the low-melting-point glass glass exhaust tube that diameter 1-10mm does not wait that is tightly connected
Fig. 3 is known use vapor pipe and bell jar sealing method synoptic diagram.A is a prebasal plate glass among the figure, and B is a metacoxa glass, and a is at panel corner venting hole, b is that c is a rubber seal with the low-melting-point glass glass exhaust tube that diameter 1-10mm does not wait that is tightly connected, and d is a stainless steel bell jar type device, e is a metal tube, and f is a pumped vacuum systems, and g is an electric heater unit.
Fig. 4 is to use the vapor pipe sealing-in to finish rear exhaust port shape synoptic diagram.A is a prebasal plate glass among the figure, and B is a metacoxa glass, and a is a venting hole, and b is a vapor pipe, and c is the termination that stays after the vapor pipe fusion.
Fig. 5 is the isolation point of suppon synoptic diagram that forms on the glass substrate of back through behind silk screen printing, drying, the sintering.B is the back glass substrate among the figure, and a isolates point of suppon.
Fig. 6 is the low melting glass rete that is used for seal glass edges of boards portion, abbreviates the synoptic diagram of sealing layer as.A is a prebasal plate glass among the figure, and a is a venting hole, and b is a sealing layer.
After Fig. 7 is the forward and backward glass substrate sealing-in of vacuum glass, the isolation point of suppon shape synoptic diagram of formation.A is a prebasal plate glass among the figure, and B is a metacoxa glass, and a isolates the point of suppon shape.
Fig. 8 forms diameter 3-15mm, the thick 10-250 μ m left and right sides solid low-melting-point glass rete synoptic diagram behind the printing sintering; A is a tinsel among the figure, and b is the low-melting-point glass rete that forms behind the sintering.
Fig. 9 is that the formation width is 3-10mm behind the printing sintering, thick 10-250 μ m left and right sides ring-type low-melting-point glass rete synoptic diagram.A is a tinsel among the figure, and b is the low-melting-point glass rete that forms behind the sintering.
Figure 10 is the sectional view of single sealing-in sheet, and a is a tinsel among the figure, and b is the low-melting-point glass rete that forms behind the sintering.
Figure 11 is the sectional view of single sealing-in sheet, and a is a tinsel among the figure, and b is the low-melting-point glass rete that forms behind the sintering.
Figure 12 is a vacuum exhaust closing device synoptic diagram disclosed by the invention, and a is the enclosed vacuum chamber among the figure, and b is the stainless steel pipes that connects vacuum chamber and air-bleed system, c is an air-bleed system, d be around the vacuum glass faceplate that finishes of edge sealing, e is the sealing-in worktable that is positioned at vacuum chamber, f is a venting hole.G is a push rod that can move up and down that is positioned at the venting hole below, h is the thick 1-3mm of being that is positioned at the upper surface of push rod, diameter is the heat conductivility good metal sheet of 8-30mm, i is the electric heating device that is positioned under the tinsel h, j is the sealing-in sheet, comprises metal and the low-melting-point glass that is sintered to fix on metal last slice.
Figure 13 is second kind of vacuum exhaust closing device synoptic diagram disclosed by the invention.A is a threeway stainless steel bell jar among the figure, and b is a stainless steel pipes, the c pumped vacuum systems.D is the heat-resistant rubber seal ring that is positioned at the bell jar upper edge hole.F is a push rod that can move up and down that is positioned at the stainless steel bell jar, g is the heat conductivility good metal sheet at the upper surface of push rod, h is the electric heating device under this tinsel, and i is the sealing-in sheet, comprises metal and the low-melting-point glass that is sintered to fix on metal last slice.J is a vacuum glass faceplate of sealing the limit all around, and k is the sealing-in worktable, and l is the last housing that electrically heated and temperature controlling system are arranged.
Figure 14 is the diagrammatic cross-section that adopts sealing-in sheet sealing-in final vacuum shown in Figure 8 hole site.A is a venting hole among the figure, and b seals the back low-melting-point glass, and c is the tinsel on the sealing-in sheet.
Figure 15 is the diagrammatic cross-section that adopts sealing-in sheet sealing-in final vacuum shown in Figure 9 hole site.A is a venting hole among the figure, and b seals the back low-melting-point glass, and c is the tinsel on the sealing-in sheet.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Embodiment 1
(1) with size cutting, edging, the cleaning on request of glass raw sheet.The glass raw sheet can be common float glass, toughened glass, various coated glass, glass with clean, low emissivity glass, high visible light transmissivity glass or the like.
(2) making diameter with mechanical drill or laser-beam drilling machine on a sheet glass is the venting hole of 2mm, and this sheet glass is called prebasal plate glass, and correspondingly, another sheet glass is called metacoxa glass.
(3) isolate point of suppon on glass making of metacoxa of method for printing screen.The non-crystalline type low-melting-point glass powder (afterwards being called low-melting-point glass powder A) and the organic solution that are slightly less than the face glass thermal expansivity with thermal expansivity are mixed with the slurry that a kind of rheological is suitable for silk screen printing.Printing on the metacoxa glass B about diameter 0.5mm with method for printing screen then, the wet film idea of the about 25-35 μ of thickness m, each idea spacing distance is 25 * 25mm.Through on the glass substrate of back, forming isolation point of suppon as shown in Figure 5 behind super-dry, the sintering.
(4) will be used for front glass substrate and the back glass substrate non-crystalline type low-melting-point glass powder (afterwards being called low-melting-point glass powder B) of sealing be mixed with can silk screen printing slurry, regulate the viscosity and the rheological of slurry, on the glass-based edges of boards of back with method for printing screen around print the wide 6mm of one deck, the thick glass powder with low melting point slurry wet film of thick about 20-30 μ m.Through on sheet glass, forming the low melting glass rete that is used for seal glass edges of boards portion as shown in Figure 6 after the drying and sintering, abbreviate sealing layer as.
(5) front glass substrate and back glass substrate is superimposed face-to-face, the face of isolating point of suppon is promptly arranged and have the face of sealing layer staggered relatively.Getter is put near venting hole corner.Periphery with heat-resisting elastic mechanical clamp clamps face glass, anchor clamps will guarantee that the face glass periphery is stressed evenly, and be subjected to thermal softening isolating point of suppon and sealing layer, can continue maintenance during forward and backward glass substrate pitch smaller and give forward and backward glass substrate uniform pressure.Heat the sealing temperature that reaches the sealing layer of making of low-melting-point glass B through grill-hearth travelling oven then, present embodiment is 450 ℃, and under this temperature, the isolation point of suppon of making of low-melting-point glass A sintering also can soften deformation under stressed effect.Sealing temperature at sealing layer kept 8 minutes, evenly reduced to room temperature then.
(6) be mixed with the slurry that a kind of rheological is suitable for silk screen printing with non-crystalline type low-melting-point glass powder C and organic solution.The sealing temperature of this low-melting-point glass powder hangs down 30 ℃ than the sealing temperature of the low-melting sealing glass of sealing-in vacuum glass faceplate limit portion, and thermal expansivity is a little less than the thermal expansivity of face glass.Be that printing forms the slurry wet film on the 426 thick alloy slices of 1mm with method for printing screen at thickness then, form diameter 6mm, the solid low-melting-point glass rete in the thick 30 μ m left and right sides through super-dry, behind 400 ℃ of sintering after the printing.Fig. 8 is the pattern synoptic diagram that forms, and a is a tinsel among the figure, and b is the low-melting-point glass rete that forms behind the sintering.It is 10mm circle sealed sheet that the alloy slice of Fig. 8 is cut into single diameter.The sectional view of single sealing-in sheet is seen Figure 10.The thermal expansivity of 426 alloy slices is close with the thermal expansivity of face glass.
(7) vacuum exhaust sealing step is referring to device shown in Figure 12, with around the vacuum glass faceplate d overall fixed that finishes of edge sealing being positioned on the sealing-in worktable e of vacuum chamber, facing down of venting hole f arranged.100mm is a push rod g that can move up and down below venting hole f, is the thick 1.5mm that is at the upper surface of push rod, and diameter is the heat conductivility good metal sheet h of 20mm.Under this tinsel electric heating device i.Indoor in enclosed vacuum, vacuum panels and vacuum chamber heated together vacuumize, temperature reaches 350 ℃.After meeting the requirements of vacuum tightness, connect the interior electric heater unit i of push rod g among Figure 12, heating be positioned at push rod upper end sealing-in sheet j, the low-melting-point glass on the sealing-in sheet j reaches sealing temperature, 420 ℃ of present embodiments, by mechanism push rod g being risen is pressed on the venting hole f sealing-in sheet, keep withstanding venting hole under certain pressure, cooling after 3 minutes is after temperature is lower than 250 ℃, unclamp push rod, be cooled to room temperature.The exhaust sealing process finishes.Figure 14 is the diagrammatic cross-section of sealing-in final vacuum hole site.A is a venting hole among the figure, and b seals the back low-melting-point glass, and c is the tinsel on the sealing-in sheet.
(8) make the getter activation that is placed on panel venting hole edge air-breathing with ratio-frequency heating, further improve the vacuum tightness in the vacuum glass faceplate.
(9) detect the vacuum glass performance, install plastics or plastic-steel frame after meeting the requirements additional.Obtain qualified vacuum glass faceplate goods.
Embodiment 2
(1) with size cutting, edging, the cleaning on request of glass raw sheet.The glass raw sheet can be common float glass, toughened glass, various coated glass, glass with clean, low emissivity glass, high visible light transmissivity glass or the like.
(2) making diameter with mechanical drill or laser-beam drilling machine on a sheet glass is the venting hole of 1mm, and this sheet glass is called prebasal plate glass, and correspondingly, another sheet glass is called metacoxa glass.
(3) isolate point of suppon on glass making of metacoxa of method for printing screen.The non-crystalline type low-melting-point glass powder (afterwards being called low-melting-point glass powder A) and the organic solution that are slightly less than the thermal expansivity of face glass with thermal expansivity are mixed with the slurry that a kind of rheological is suitable for silk screen printing.Printing on the metacoxa glass B about diameter 0.5mm with method for printing screen then, the wet film idea of the about 230-240 μ of thickness m, each idea spacing distance is 40 * 40mm.Through on the glass substrate of back, forming isolation point of suppon as shown in Figure 5 behind super-dry, the sintering.
(4) will be used for front glass substrate and the back glass substrate non-crystalline type low-melting-point glass powder (afterwards being called low-melting-point glass powder B) of sealing be mixed with can silk screen printing slurry, regulate the viscosity and the rheological of slurry, on the glass-based edges of boards of back with method for printing screen around print the wide 8mm of one deck, the thick glass powder with low melting point slurry wet film of thick about 225-235 μ m.Through on sheet glass, forming the low melting glass rete that is used for seal glass edges of boards portion as shown in Figure 6 after the drying and sintering, abbreviate sealing layer as.
(5) front glass substrate and back glass substrate is superimposed face-to-face, the face of isolating point of suppon is promptly arranged and have the face of sealing layer staggered relatively.Getter is put near venting hole corner.Periphery with heat-resisting elastic mechanical clamp clamps face glass, anchor clamps will guarantee that the face glass periphery is stressed evenly, and be subjected to thermal softening isolating point of suppon and sealing layer, can continue maintenance during forward and backward glass substrate pitch smaller and give forward and backward glass substrate uniform pressure.Heat the sealing temperature that reaches the sealing layer of making of low-melting-point glass B through intermittent type electrical heater or grill-hearth travelling oven then, present embodiment is 420 ℃, under this temperature, the isolation point of suppon of making of low-melting-point glass A sintering also can soften deformation under stressed effect.Sealing temperature at sealing layer kept 12 minutes, evenly reduced to room temperature then.
(6) be mixed with the slurry that a kind of rheological is suitable for silk screen printing with non-crystalline type low-melting-point glass powder C and organic solution.The sealing temperature of this low-melting-point glass powder hangs down 30 ℃ than the sealing temperature of the low-melting sealing glass of sealing-in vacuum glass faceplate limit portion, and thermal expansivity is a little less than the thermal expansivity of face glass.Be that printing forms the slurry wet film on the 426 thick alloy slices of 1.5mm with method for printing screen at thickness then, form diameter 5mm, the solid low-melting-point glass rete in the thick 25 μ m left and right sides through super-dry, behind 390 ℃ of sintering after the printing.Fig. 8 is the pattern synoptic diagram that forms, and a is a tinsel among the figure, and b is the low-melting-point glass rete that forms behind the sintering.It is 8mm circle sealed sheet that the alloy slice of Fig. 8 is cut into single diameter.The sectional view of single sealing-in sheet is seen Figure 10.The thermal expansivity of 426 alloy slices is close with the thermal expansivity of face glass.
(7) vacuum exhaust sealing step is referring to device shown in Figure 12, with around the vacuum glass faceplate d overall fixed that finishes of edge sealing being positioned on the sealing-in worktable e of vacuum chamber, facing down of venting hole f arranged.100mm is a push rod g that can move up and down below venting hole f, is the thick 1.5mm that is at the upper surface of push rod, and diameter is the heat conductivility good metal sheet h of 20mm.Indoor in enclosed vacuum, vacuum panels and vacuum chamber heated together vacuumize, temperature reaches 390 ℃.After meeting the requirements of vacuum tightness, low-melting-point glass on the sealing-in sheet j reaches sealing temperature, 390 ℃, by mechanism push rod g being risen is pressed on the venting hole f sealing-in sheet j, keep withstanding venting hole under certain pressure, cooling after 5 minutes is after temperature is lower than 300 ℃, unclamp push rod, be cooled to room temperature.The exhaust sealing process finishes.Figure 14 is the diagrammatic cross-section of sealing-in final vacuum hole site.A is a venting hole among the figure, and b seals the back low-melting-point glass, and c is the tinsel on the sealing-in sheet.
(8) make the getter that is placed on panel venting hole edge activate vacuum tightness in the air-breathing further raising vacuum glass faceplate with ratio-frequency heating.
(9) detect the vacuum glass performance, install plastics or plastic-steel frame after meeting the requirements additional.Obtain qualified vacuum glass faceplate goods.
Embodiment 3
(1) with size cutting, edging, the cleaning on request of glass raw sheet.The glass raw sheet can be common float glass, toughened glass, various coated glass, glass with clean, low emissivity glass, high visible light transmissivity glass or the like.
(2) making diameter with mechanical drill or laser-beam drilling machine on a sheet glass is the venting hole of 3mm, and this sheet glass is called prebasal plate glass, and correspondingly, another sheet glass is called metacoxa glass.
(3) isolate point of suppon on glass making of metacoxa of method for printing screen.The non-crystalline type low-melting-point glass powder (afterwards being called low-melting-point glass powder A) and the organic solution that are slightly less than the thermal expansivity of face glass with thermal expansivity are mixed with the slurry that a kind of rheological is suitable for silk screen printing.Printing on the metacoxa glass B about diameter 0.5mm with method for printing screen then, the wet film idea of the about 135-145 μ of thickness m, each idea spacing distance is 80 * 80mm.Through on the glass substrate of back, forming isolation point of suppon as shown in Figure 5 behind super-dry, the sintering.
(4) will be used for front glass substrate and the back glass substrate non-crystalline type low-melting-point glass powder (afterwards being called low-melting-point glass powder B) of sealing be mixed with can silk screen printing slurry, regulate the viscosity and the rheological of slurry, on the glass-based edges of boards of back with method for printing screen around print the wide 4mm of one deck, the thick glass powder with low melting point slurry wet film of thick about 130-140 μ m.Through on sheet glass, forming the low melting glass rete that is used for seal glass edges of boards portion as shown in Figure 6 after the drying and sintering, abbreviate sealing layer as.
(5) front glass substrate and back glass substrate is superimposed face-to-face, the face of isolating point of suppon is promptly arranged and have the face of sealing layer staggered relatively.Getter is put near venting hole corner.Periphery with heat-resisting elastic mechanical clamp clamps face glass, anchor clamps will guarantee that the face glass periphery is stressed evenly, and be subjected to thermal softening isolating point of suppon and sealing layer, can continue maintenance during forward and backward glass substrate pitch smaller and give forward and backward glass substrate uniform pressure.Heat the sealing temperature that reaches the sealing layer of making of low-melting-point glass B through intermittent type electrical heater or grill-hearth travelling oven then, present embodiment is 400 ℃, under this temperature, the isolation point of suppon of making of low-melting-point glass A sintering also can soften deformation under stressed effect.Sealing temperature at sealing layer kept 15 minutes, evenly reduced to room temperature then.
(6) be mixed with the slurry that a kind of rheological is suitable for silk screen printing with non-crystalline type low-melting-point glass powder C and organic solution.The sealing temperature of this low-melting-point glass powder hangs down 30 ℃ than the sealing temperature of the low-melting sealing glass of sealing-in vacuum glass faceplate limit portion, and thermal expansivity is a little less than the thermal expansivity of face glass.Be that printing forms the slurry wet film on the 426 thick alloy slices of 1.5mm with method for printing screen at thickness then, printing back formation width through super-dry, behind 370 ℃ of sintering is 6mm, thick 30 μ m left and right sides ring-type low-melting-point glass retes.Fig. 9 is the pattern synoptic diagram that forms, and a is a tinsel among the figure, and b is the low-melting-point glass rete that forms behind the sintering.It is 10 * 10mm quadrate sealing-in sheet that the alloy slice of Fig. 9 is cut into single diameter.The sectional view of single sealing-in sheet is seen Figure 10.The thermal expansivity of 426 alloy slices is close with the thermal expansivity of face glass.
(7) Figure 13 is the vacuumizing and exhausting closing device.The j vacuum glass faceplate of sealing the limit all around is placed on the k sealing-in worktable, the last housing l of electrically heated and temperature controlling system is arranged on the cover, heating makes vacuum glass faceplate reach 250 ℃; Put the sealing-in sheet i that has through the low-melting-point glass of presintering at push rod f upper surface, note venting hole center, circular bell jar center, push rod center and sealing-in sheet center-aligned.At this moment, the position, upper edge of push rod is apart from venting hole 200mm, and energising adds the heat sealing sheet, makes the low-melting-point glass on the sealing-in sheet i be heated to 370 ℃ of softening fusions, reaches the sealing temperature of low-melting-point glass.After vacuum tightness in vacuum glass faceplate reaches requirement, by mechanism push rod is risen and be pressed on the venting hole, keep withstanding venting hole under certain pressure, cooling after temperature is lower than 280 ℃, is unclamped push rod after 5 minutes, is cooled to room temperature.The exhaust sealing process finishes.Figure 15 is the diagrammatic cross-section of sealing-in final vacuum hole site.A is a venting hole among the figure, and b seals the back low-melting-point glass, and c is the tinsel on the sealing-in sheet.
(8) make the getter that is placed on panel venting hole edge activate vacuum tightness in the air-breathing further raising vacuum glass faceplate with ratio-frequency heating.
(9) detect the vacuum glass performance, install plastics or plastic-steel frame after meeting the requirements additional.Obtain qualified vacuum glass faceplate goods.
Embodiment 4
(1) with size cutting, edging, the cleaning on request of glass raw sheet.The glass raw sheet can be common float glass, toughened glass, various coated glass, glass with clean, low emissivity glass, high visible light transmissivity glass or the like.
(2) making diameter with mechanical drill or laser-beam drilling machine on a sheet glass is the venting hole of 3.5mm, and this sheet glass is called prebasal plate glass, and correspondingly, another sheet glass is called metacoxa glass.
(3) isolate point of suppon on glass making of metacoxa of method for printing screen.The non-crystalline type low-melting-point glass powder (afterwards being called low-melting-point glass powder A) and the organic solution that are slightly less than the thermal expansivity of face glass with thermal expansivity are mixed with the slurry that a kind of rheological is suitable for silk screen printing.Printing on the metacoxa glass B about diameter 0.5mm with method for printing screen then, the wet film idea of the about 85-95 μ of thickness m, each idea spacing distance is 50 * 50mm.Through on the glass substrate of back, forming isolation point of suppon as shown in Figure 5 behind super-dry, the sintering.
(4) will be used for front glass substrate and the back glass substrate non-crystalline type low-melting-point glass powder (afterwards being called low-melting-point glass powder B) of sealing be mixed with can silk screen printing slurry, regulate the viscosity and the rheological of slurry, on the glass-based edges of boards of back with method for printing screen around print the wide 6mm of one deck, the thick glass powder with low melting point slurry wet film of thick about 80-90 μ m.Through on sheet glass, forming the low melting glass rete that is used for seal glass edges of boards portion as shown in Figure 6 after the drying and sintering, abbreviate sealing layer as.
(5) front glass substrate and back glass substrate is superimposed face-to-face, the face of isolating point of suppon is promptly arranged and have the face of sealing layer staggered relatively.Getter is put near venting hole corner.Periphery with heat-resisting elastic mechanical clamp clamps face glass, anchor clamps will guarantee that the face glass periphery is stressed evenly, and be subjected to thermal softening isolating point of suppon and sealing layer, can continue maintenance during forward and backward glass substrate pitch smaller and give forward and backward glass substrate uniform pressure.Heat the sealing temperature that reaches the sealing layer of making of low-melting-point glass B through intermittent type electrical heater or grill-hearth travelling oven then, present embodiment is 430 ℃, under this temperature, the isolation point of suppon of making of low-melting-point glass A sintering also can soften deformation under stressed effect.Sealing temperature at sealing layer kept 12 minutes, evenly reduced to room temperature then.
(6) be mixed with the slurry that a kind of rheological is suitable for silk screen printing with non-crystalline type low-melting-point glass powder C and organic solution.The sealing temperature of this low-melting-point glass powder hangs down 30 ℃ than the sealing temperature of the low-melting sealing glass of sealing-in vacuum glass faceplate limit portion, and thermal expansivity is a little less than the thermal expansivity of face glass.Be that printing forms the slurry wet film on the 426 thick alloy slices of 2mm with method for printing screen at thickness then, printing back formation width through super-dry, behind 400 ℃ of sintering is 8mm, thick 25 μ m left and right sides ring-type low-melting-point glass retes.Fig. 9 is the pattern synoptic diagram that forms, and a is a tinsel among the figure, and b is the low-melting-point glass rete that forms behind the sintering.It is 8 * 8mm quadrate sealing-in sheet that the alloy slice of Fig. 9 is cut into single diameter.The sectional view of single sealing-in sheet is seen Figure 10.The thermal expansivity of 426 alloy slices is close with the thermal expansivity of face glass.
(7) Figure 13 is the vacuumizing and exhausting closing device.The j vacuum glass faceplate of sealing the limit all around is placed on the k sealing-in worktable, the last housing l of electrically heated and temperature controlling system is arranged on the cover, heating makes vacuum glass faceplate reach 400 ℃; Put the sealing-in sheet i that has through the low-melting-point glass of presintering at push rod f upper surface, note venting hole center, circular bell jar center, push rod center and sealing-in sheet center-aligned.At this moment, the position, upper edge of push rod is apart from venting hole 250mm, and energising adds the heat sealing sheet, makes the low-melting-point glass on the sealing-in sheet i be heated to 400 ℃ of softening fusions, reaches the sealing temperature of low-melting-point glass.After vacuum tightness in vacuum glass faceplate reaches requirement, by mechanism push rod is risen and be pressed on the venting hole, keep withstanding venting hole under certain pressure, cooling after temperature is lower than 300 ℃, is unclamped push rod after 4 minutes, is cooled to room temperature.The exhaust sealing process finishes.Figure 15 is the diagrammatic cross-section of sealing-in final vacuum hole site.A is a venting hole among the figure, and b seals the back low-melting-point glass, and c is the tinsel on the sealing-in sheet.
(8) make the getter that is placed on panel venting hole edge activate vacuum tightness in the air-breathing further raising vacuum glass faceplate with ratio-frequency heating.
(9) detect the vacuum glass performance, install plastics or plastic-steel frame after meeting the requirements additional.Obtain qualified vacuum glass faceplate goods.
It should be noted that, above embodiment only is used for technical scheme of the present invention, it will be understood by those skilled in the art that technical scheme of the present invention is carried out various changes and equivalence replacement, and do not deviate from the principle and the scope of technical solution of the present invention, all should be encompassed among the scope of claim of the present invention.
Claims (10)
1. a novel method and device for preparing vacuum glass.Method: make isolation point of suppon and face glass limit portion hermetic seal layer between the panel respectively with silk-screen printing technique, the softening temperature, thermomechanical property, the thickness of isolation point of suppon and the thickness of sealing layer that require to isolate point of suppon and the employed low-melting-point glass of sealing layer accurately mate.After the edge sealing exhaust, use device of the present invention sealing venting port, roasting technology such as disappear, detect, frame up to make vacuum glass.Exhaust sealing device: an enclosed vacuum chamber, the facing down of vacuum glass faceplate venting hole that edge sealing is finished is fixed on the sealing-in worktable; A movably push rod that has electric heating device is arranged below venting hole; Another kind of device is not need vacuum chamber, bell jar with a band sealing-ring, the bell jar roof pressure is after exhaust finishes under venting hole, have in the bell jar electric heating device, movably push rod in advance the sintering sealing temperature roof pressure that has the tinsel of low-melting-point glass to be heated to low-melting-point glass on venting hole, seal.
2. the method for isolating point of suppon between the making vacuum glass faceplate according to claim 1, it is characterized in that: the low-melting-point glass powder is mixed with the printing slurry, after printing on the sheet glass, make isolation point of suppon between the vacuum glass faceplate with method for printing screen through operations such as super-dry, sintering.Supporting with it technology is with the method for printing screen printing, through super-dry on the glass substrate of back, sintering circuit is made the sealing layer of sealing-in vacuum glass faceplate limit portion, and the softening temperature of the employed low-melting-point glass powder of this sealing layer is a little less than the softening temperature of the low-melting-point glass powder of making point of suppon.The thickness of the thickness of point of suppon a little more than sealing layer is isolated in control.Under sealing temperature, the isolation point of suppon behind the sintering is slightly hard than limit portion sealing layer, is subjected under the uniform pressure, and the former deformation is smaller.
3. the method for isolating point of suppon between the making vacuum glass faceplate according to claim 1, it is characterized in that: isolating point of suppon is glassiness sintered compact, the diameter of this sintered compact is 0.1-1.0mm, and thickness is 20-250 μ m, the sealing-in floor height 1-20 μ m that uses than vacuum glass faceplate sealing-in limit portion.
4. isolate the method for point of suppon between the making vacuum glass faceplate according to claim 1, it is characterized in that: the low-melting-point glass powder that is used to make sealing-in limit portion sealing layer hangs down 3-30 ℃ than the softening temperature that is used to make the low-melting-point glass powder of isolating point of suppon.
5. the method for isolating point of suppon between the making vacuum glass faceplate according to claim 1, it is characterized in that: more than glass softening point, the hot mechanical paths appearance similar of the sintered compact that is used to make sintered compact that the sealing by fusing glass powder of isolating point of suppon forms and forms as the sealing glass powder of sealing-in limit portion, the former is high approximately 3-30 ℃ but reach the needed temperature of identical deformation quantity.
6. the vacuum glass faceplate exhaust-pipe-free exhaust method for sealing that is used for according to claim 1, it is characterized in that: the low-melting-point glass powder is mixed with the printing slurry, after printing on the tinsel, make the sealing-in sheet that is used for sealing-in vacuum glass faceplate venting hole with method for printing screen through operations such as super-dry, sintering.Sheet thicknesses is 0.2-2mm, and diameter is the disk of 4-20mm or (10-20) * (10-20) mm square plate.The sintered layer that presintering forms on the tinsel can be 3-15mm, and thick 10-40 μ m left and right sides solid membrane also can be that width is 3-10mm, the annular membrane about thick 10-40 μ m.
7. the vacuum glass faceplate exhaust-pipe-free exhaust method for sealing that is used for according to claim 1 is characterized in that: the sealing temperature of the low-melting-point glass powder of use hangs down 10-80 ℃ than the sealing temperature of the employed low-melting-point glass of vacuum glass faceplate limit portion's sealing-in.Thermal expansivity is a little less than the thermal expansivity of face glass.
8. the vacuum glass faceplate exhaust-pipe-free exhaust method for sealing that is used for according to claim 1, it is characterized in that: the thermal expansivity of the tinsel that is used to seal is close with the thermal expansivity of face glass.
9. vacuum glass faceplate exhaust-pipe-free exhaust sealing-in device and the method for sealing of being used for according to claim 1, it is characterized in that: indoor in enclosed vacuum, with around the vacuum glass faceplate overall fixed that finishes of edge sealing being positioned on the sealing-in worktable of vacuum chamber, facing down of venting hole arranged.50-300mm is a push rod that can move up and down below venting hole, is the thick 1-3mm that is at the upper surface of push rod, and diameter is the heat conductivility good metal sheet of 8-30mm, can be copper or other alloy slice.Be electric heating device under this tinsel, electric heater unit can be intermediate frequency, high frequency, hot resistance, nichrome wire or mica heating piece, and the low-melting-point glass that is used to add process presintering on the heat sealing sheet reaches its sealing temperature.On this tinsel, place the sealing-in sheet described in the claim 6, comprise metal and the low-melting-point glass that is sintered to fix on tinsel.Note the strict alignment in center of venting hole center, push rod and sealing-in sheet.Its method feature is: indoor in enclosed vacuum, and vacuum panels and vacuum chamber heated together vacuumize.A kind of mode is the sealing temperature that vacuum chamber and face glass integral body is heated to low-melting-point glass on the sealing-in sheet, be generally 380-450 ℃, by mechanism push rod being risen is pressed on the venting hole, under certain pressure, keep withstanding venting hole, 0.5-5 cooling after minute, after temperature is lower than 250-300 ℃, unclamp push rod, be cooled to room temperature.Another kind of mode is that vacuum chamber and face glass integral body are heated to the sealing temperature that is lower than low-melting-point glass on the sealing-in sheet, is generally 200-360 ℃, then with the heating of the electric heater unit in the push rod be positioned on the push rod the sealing-in sheet.After meeting the requirements of vacuum tightness, low-melting-point glass on the sealing-in sheet reaches sealing temperature, be generally 380-450 ℃, by mechanism push rod being risen is pressed on the venting hole, keep withstanding venting hole under certain pressure, cooling after 0.5-5 minute is after temperature is lower than 250-300 ℃, unclamp push rod, be cooled to room temperature.
10. vacuum glass faceplate exhaust-pipe-free exhaust sealing-in device and the method for sealing of being used for according to claim 1 is characterized in that: the exhaust closing device is a threeway stainless steel bell jar, connects pumped vacuum systems by stainless steel pipes.The bell jar upper edge hole has heat-resistant rubber seal ring, and a push rod is arranged in the bell jar; Upper surface at push rod is the thick 1-3mm that is, diameter is the heat conductivility good metal sheet of 8-30mm, can be copper or other alloy slice.Be electric heating device under this tinsel, electric heater unit can be intermediate frequency, high frequency, hot resistance, nichrome wire or mica heating piece.The low-melting-point glass that is used to add process presintering on the heat sealing sheet reaches its sealing temperature.Its method feature is: the vacuum glass faceplate that hermetic seal all around finishes is placed on the sealing-in worktable, the last housing that electrically heated and temperature controlling system are arranged on the last face shield, heating makes vacuum glass faceplate reach 200-300 ℃: place the sealing-in sheet described in the claim 6 at the push rod upper surface, comprise metal and the low-melting-point glass that is sintered to fix on tinsel.Note the strict alignment in center of venting hole center, push rod and sealing-in sheet.At this moment, the position, upper edge of push rod is apart from venting hole 50-300mm, and energising adds the heat sealing sheet, makes the low-melting-point glass on the sealing-in sheet be heated to 350-430 ℃ of softening fusion, reaches the sealing temperature of low-melting-point glass.After vacuum tightness in vacuum glass faceplate reaches requirement, by mechanism push rod is risen and be pressed on the venting hole, keep withstanding venting hole under certain pressure, cooling after temperature is lower than 250-300 ℃, is unclamped push rod after 0.5-5 minute, is cooled to room temperature.
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2006
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