CN102953443B

CN102953443B - Convex low-altitude thermal baffle and preparation method thereof

Info

Publication number: CN102953443B
Application number: CN201210075646.7A
Authority: CN
Inventors: 戴长虹
Original assignee: Qingdao University of Technology
Current assignee: Qingdao University of Technology
Priority date: 2012-03-21
Filing date: 2012-03-21
Publication date: 2016-01-20
Anticipated expiration: 2032-03-21
Also published as: CN102953443A

Abstract

The invention provides a kind of low-altitude thermal baffle, it comprises: upper insulating board, lower insulating board, the periphery of described upper insulating board and described lower insulating board is welded together by solder, the low dead level that between described upper insulating board and described lower insulating board, formation one is closed, described upper insulating board and described lower insulating board are convex surface insulating boards, convex surface insulating board convex surface facing outside.The preparation method technique of this low-altitude thermal baffle of the present invention is simple, prepared low-altitude thermal baffle overcomes the deficiency of existing insulating board, effectively can ensure the tightness of the low dead level of low-altitude thermal baffle, extend the application life of low-altitude thermal baffle, and can gain in strength and heat insulation, sound insulation and fireproof performance, also there is good decorative effect simultaneously.

Description

Convex low-altitude thermal baffle and preparation method thereof

Technical field

The present invention relates to energy-saving building technology field, particularly relate to a kind of low-altitude thermal baffle and preparation method thereof.

Background technology

Current domestic construction exterior-wall heat insulation material used is mainly B level heat insulating material, as organic materials such as polystyrene, polyurethane, bipeltates, these organic material heat resistances are poor, easy firing, not only discharge a large amount of heats during burning, produce a large amount of poison gas, and large fire spread can be accelerated; Simultaneously, molten contracting can be there is in organic material when fire, produce density flaming droplet, on initiation insulation layer, institute's tile fixing comes off, cause spot fire and secondary injury possibly, so national relative section prohibites exterior-wall heat insulation use organic insulation material, particularly at highrise building and public building.Reach in the heat insulating material of A grade standard in combustibility, mainly with the inorganic material that mineral wool and rock wool are representative, but existing home made article requires very large gap with Application in Building in water absorption rate, intensity, weatherability etc., be directly used in construction wall insulation, problems such as water suction will being occurred, drop, be softening.In addition, A level heat insulating material cost is far away higher than organic material, and complicated construction technique construction cost is far beyond the expense of B level heat insulating material, and its poor thermal insulation property and energy consumption is high, the needs of national current energy-saving and emission-reduction can not be met.

Summary of the invention

Technical problem to be solved by this invention is the defect being to exist for existing building insulating board, warming plate, a kind of novel low pressure hollow heat insulation plate---low-altitude thermal baffle and preparation method thereof is provided, the preparation method technique of this low-altitude thermal baffle is simple, prepared low-altitude thermal baffle can overcome the deficiency of existing insulating board and warming plate, effectively can ensure the tightness of low-altitude thermal baffle, increase the service life, and its intensity and heat insulation, sound insulation, fireproof performance can be increased, also there is good decorative effect simultaneously.

In order to solve the problems of the technologies described above, the invention provides a kind of convex low-altitude thermal baffle, it comprises: upper insulating board, lower insulating board, the periphery of described upper insulating board and described lower insulating board is welded together by solder, low pressure hollow layer---the low dead level that between described upper insulating board and described lower insulating board, formation one is closed, described upper insulating board and described lower insulating board are convex surface insulating boards, convex surface facing outside.

Wherein, described upper and lower insulating board comprises glass plate, ceramic wafer or metal sheet.

Wherein, the inner surface of described upper or lower insulating board is coated with low-radiation film, as aluminium film etc.

Wherein, described low dead level be low-altitude thermal baffle at high temperature edge sealing, be down to self-assembling formation after room temperature, the air pressure in described low dead level is determined by the fusing point of solder, is generally 0.01 ~ 0.09MPa, is preferably 0.02 ~ 0.07MPa.

Wherein, the convex surface bow of described convex surface insulating board is high is not less than 0.1mm, is preferably 1 ~ 200mm, more preferably 3 ~ 20mm.

Wherein, the periphery of one piece of insulating board is had in described upper and lower insulating board at least at least containing an edge band frame.

Wherein, described edge band frame adopts the preparation of printing cryogenic glass powder or utilizes mould to squeeze and makes.

Wherein, described convex low-altitude thermal baffle can also comprise one piece of middle insulating board, described middle insulating board is clipped between described upper insulating board and described lower insulating board, and described upper insulating board and described lower insulating board form two closed low dead levels respectively with described middle insulating board.

In order to solve the problems of the technologies described above, the invention provides the preparation method of above-mentioned convex low-altitude thermal baffle, it comprises:

The first step, the preparation of mould: the making mould preparing convex surface insulating board according to the shape of the convex low-altitude thermal baffle of required making and size;

When described insulating board is glass plate, make the hot bending die in existing heat-bending glass technology of preparing;

When described insulating board is ceramic wafer, make the diel in existing ceramic wafer technology of preparing or slip casting mould;

When described insulating board is metal sheet, make the diel in existing metal sheet technology of preparing;

Second step, the making of convex surface insulating board: utilize mould to prepare convex surface insulating board;

When described insulating board is glass plate, prepare two blocks of sheet glass plates of required size, and carry out edging, chamfering, cleaning, dry process, glass plate after processing two pieces loads in hot bending die, is placed in bending furnace, is warming up to the temperature 550 ~ 750 DEG C that glass plate is softening, relies on the gravity of glass plate self to make insulating board form convex surface downwards, and be down to room temperature with stove, obtain convex glass plate;

When described insulating board is ceramic wafer, the powder of existing making ceramic wafer or slurry is loaded diel or slip casting mould, prepares the base substrate of ceramic wafer, drying and high temperature sintering, obtain convex surface ceramic wafer, or the outer flat ceramic wafer of indent;

When described insulating board is metal sheet, prepares two pieces of metal sheets of required size, metal sheet is loaded in diel, obtain convex metallic plate through punching press;

3rd step, coating solder: the two pieces of insulating boards obtain second step or the solder side periphery even spread solder of one piece of insulating board, solder evenly leaves several venthole, and is stacked together by described two pieces of insulating board consistencies from top to bottom, sends in high temperature edge sealing stove;

4th step, high temperature edge sealing: described high temperature edge sealing stove is warming up to more than the melt temperature of solder, reach edge sealing temperature, venthole disappears, stop heating, lower the temperature with stove, two pieces of insulating boards hermetic weld together by solder, and the fire door opening high temperature edge sealing stove obtains required convex low-altitude thermal baffle.

In order to solve the problems of the technologies described above, the invention provides the preparation method of above-mentioned convex low-altitude thermal baffle, when being convex surface armorplate glass when having one piece in described convex low-altitude thermal baffle at least, preparation method is as follows:

When described insulating board is glass plate, prepare two blocks of sheet glass plates of required size, and carry out edging, chamfering, cleaning, dry process, glass plate after processing two pieces loads in hot bending die, is placed in bending furnace, is warming up to the temperature 550 ~ 750 DEG C that glass plate is softening, relies on the gravity of glass plate self to make insulating board form convex surface downwards, and carry out wind-cooling reinforcing immediately, obtain convex surface armorplate glass;

3rd step, coating solder: the two pieces of insulating boards obtain second step or the solder side periphery even spread solder of one piece of insulating board, solder evenly leaves several venthole, and is stacked together by described two pieces of insulating board consistencies from top to bottom, sends in high temperature edge sealing stove; Described high temperature edge sealing stove and accessory has basic heating system and hot spot system, basis heating system can adopt the mode of resistance heated as heating wire, electrothermal tube, electric hot plate etc., or adopting the mode of circulating air heating, hot spot system can adopt the mode such as resistance heated, infrared heating, LASER HEATING, Electromagnetic Heating, heating using microwave;

4th step, high temperature edge sealing: first adopt basic heating system that described high temperature edge sealing furnace interior and upper and lower insulating board entirety are heated to a basal temperature, hot spot system is adopted to carry out spot heating to upper and lower insulating board peripheral position again, reach the object at short notice solder being heated to melting, thus reach edge sealing temperature, venthole disappears, stop heating, lower the temperature with stove, two pieces of insulating boards hermetic weld together by solder, and the fire door opening high temperature edge sealing stove obtains required convex low-altitude thermal baffle.

The invention has the beneficial effects as follows:

Low-altitude thermal baffle of the present invention is a kind of thermal insulation board between hollow heat insulation plate and vacuum insulation panel, utilizes high temperature edge sealing to seal, and after being down to room temperature, automatically forms low pressure air layer between upper and lower insulating board.Compared with hollow heat insulation plate, replace organic or water-base adhesive and normal temperature edge sealing with inorganic high-temp solder and high temperature edge sealing, drastically increase sealing performance and extend application life; The rarefaction of air of low dead level, hydrone and oxygen equal size lower, alleviate the oxidation of low-radiation film, thin air also makes heat insulation and sound insulation value better; The air pressure of low dead level is less than atmospheric pressure all the time, so do not have " breathing " phenomenon.Compared with existing vacuum insulation panel, do not need to vacuumize, production technology is more simple, cost is lower, and the pressure born in insulating board use procedure is less, longer service life.Low-altitude thermal baffle of the present invention is applied to the exterior wall of building, can have the functions such as heat-insulation and heat-preservation, sound insulation, decoration, waterproof, fire prevention simultaneously.

The upper and lower insulating board of low-altitude thermal baffle of the present invention is convex surface insulating board, because insulating board itself has very high compressive strength, so rely on the shape of convex surface insulating board to resist atmospheric pressure, can not put or put supporter less, not only simplify the manufacture craft of low-altitude thermal baffle, reduce cost of production, make the production of low-altitude thermal baffle more easy, and the intensity of low-altitude thermal baffle and heat insulation, sound insulation value can be improved.In low-altitude thermal baffle, the periphery of lower insulating board contains edge band frame, make the edge sealing of low-altitude thermal baffle easier, the mutually chimeric of upper and lower edge band frame ensure that the sealing effectiveness of insulating board under deformation, there is between edge band frame and upper and lower insulating board the bond strength higher than solder, increase sealing area and airtight layer thickness between upper and lower insulating board, greatly strengthen adhesive power and the adhesive strength of sealing-in, add, the tightness of low dead level between lower insulating board, improve the life-span of low-altitude thermal baffle, achieve one-step method and prepare low-altitude thermal baffle, thus the suitability for industrialized production of low-altitude thermal baffle is promoted, greatly improve productivity ratio and the qualification rate of low-altitude thermal baffle, reduce the cost of production of low-altitude thermal baffle.

Accompanying drawing explanation

Fig. 1 is convex low-altitude thermal baffle structural representation of the present invention;

Fig. 2 is the convex low-altitude thermal baffle structural representation that lower insulating board of the present invention has edge band frame;

Fig. 3 is the convex low-altitude thermal baffle structural representation that upper and lower insulating board of the present invention all has edge band frame;

Fig. 4 to be upper and lower insulating board of the present invention be outer flat insulating board of indent and all have the convex low-altitude thermal baffle structural representation of edge band frame;

Fig. 5 is that upper and lower insulating board of the present invention all has edge band frame and lower insulating board to have the convex low-altitude thermal baffle structural representation of supporter;

Fig. 6 is the convex low-altitude thermal baffle structural representation that upper and lower insulating board of the present invention all has edge band frame and supporter;

Fig. 7 is the convex low-altitude thermal baffle structural representation of two low dead level of the present invention;

Fig. 8 is the convex low-altitude thermal baffle structural representation that upper and lower insulating board of the present invention all has the two low dead level of edge band frame.

In figure: 1. go up insulating board, 2. descend insulating board, 3. solder, 4. descend the edge band frame on insulating board, 5. go up the edge band frame of insulating board, 6. descend the supporter on insulating board, 7. go up the supporter on insulating board, 8. middle insulating board.

Detailed description of the invention

The invention provides a kind of convex low-altitude thermal baffle, it comprises: upper insulating board, lower insulating board, the periphery of described upper insulating board and described lower insulating board is welded together by solder, the low dead level that between described upper insulating board and described lower insulating board, formation one is closed, air pressure in described low dead level is 0.01 ~ 0.09MPa, described upper insulating board and described lower insulating board are convex surface insulating boards, and the bow of described convex surface insulating board is high is not less than 0.1mm, convex surface facing outside.

Described convex low-altitude thermal baffle can also comprise one piece of middle insulating board, described middle insulating board is clipped between described upper insulating board and described lower insulating board, and described upper insulating board and described lower insulating board form two closed low dead levels respectively with described middle insulating board.

Described convex low-altitude thermal baffle may further include insulating board in the middle of polylith, thus comprises multiple closed low dead level.

Upper insulating board and the lower insulating board of convex low-altitude thermal baffle utilize the convex shape of insulating board to resist atmospheric pressure, the low dead level two pieces of insulating boards can not be pressed together, keeping between two insulating boards, can eliminate making and the very large supporter of installation difficulty; Without the conduction of supporter, the heat insulation and sound insulation value of low-altitude thermal baffle is better; Convex configuration, makes insulating board have higher compressive strength and flexural strength; Convex configuration, makes low dead level have larger space, and the life-span of low dummy status, low-altitude thermal baffle more can be kept for a long time longer, even if lose low latitude, its performance is also better than general hollow heat insulation plate.

Described upper and lower insulating board comprises glass plate, ceramic wafer or metal sheet.

The inner surface of described upper or lower insulating board is coated with low-radiation film, as aluminium film etc.

Described low dead level be low-altitude thermal baffle at high temperature edge sealing, be down to self-assembling formation after room temperature.

Air pressure in described low dead level is preferably 0.01 ~ 0.07MPa, more preferably 0.01 ~ 0.05MPa.

The convex surface bow of upper and lower two pieces of convex surface insulating boards of described low-altitude thermal baffle is high is preferably 1 ~ 200mm, more preferably 3 ~ 20mm.

It is high that described upper and lower insulating board can have identical bow, also can according to construction to require different bows high.

Described insulating board comprises glass plate, ceramic wafer and metal sheet, can adopt following preparation method respectively:

When described insulating board is glass plate, prepare the sheet glass plate of required size, and carry out edging, chamfering, cleaning, dry process, glass plate after processing two pieces loads in hot bending die, is placed in bending furnace, is warming up to the temperature 550 ~ 750 DEG C that glass plate is softening, relies on the gravity of glass plate self to make insulating board form convex surface downwards, and be down to room temperature with stove, obtain convex glass plate; If obtain toughened glass heat-insulation plate, then the sheet glass after process is respectively charged into moulding form, puts into bending furnace, be warming up to the softening temperature 550 DEG C ~ 750 DEG C of glass, the gravity of glass self is relied on to make glass plate form convex surface downwards, carry out wind-cooling reinforcing subsequently, namely obtain that shape is convex surface, material is the insulating board of tempered glass.

The convex surface of described convex low-altitude thermal baffle bends the high shape by insulating board and size and purposes and determines, under the prerequisite of satisfied opposing atmospheric pressure and purposes, bow is high as small as possible, be advisable with 3 ~ 9mm for during common building insulating board, namely the space of 6 ~ 18mm is had between two pieces of insulating boards, be equivalent to existing hollow glass, under atmospheric pressure almost plane is best, to obtain good visual effect and the cost reducing described low-altitude thermal baffle and the space taken.

Described solder comprises commercially available high temp glass or ceramic glaze, low temperature glass solder and low-melting-point metal or solder, described high temp glass or the preferred melt temperature of ceramic glaze are the ceramic glaze of about 1100-1300 DEG C, the preferred melt temperature of described solder is the crown glass solder of about 450-750 DEG C, described low-melting-point metal or the preferred tin of solder or ashbury metal, zinc or kirsite, magnesium or magnesium alloy, aluminum or aluminum alloy etc.

Described solder is at least coated on the solder side periphery of a piece of upper and lower insulating board or the solder side periphery of two pieces and described middle insulating board.

The formation of described single low dead level convex low-altitude thermal baffle can adopt one-step method to be formed, and described one-step method comprises the steps:

By the solder side periphery even spread solder of in upper and lower insulating board piece or two pieces, solder evenly leaves several pass through solder band groove or slit as venthole; Upper and lower insulating board consistency from top to bottom is stacked together, sends in high temperature edge sealing stove; Heating makes in-furnace temperature rise to more than the melt temperature of solder, reaches edge sealing temperature, and venthole disappears; Stop heating, reduce furnace temperature to room temperature, described solder welds together bubble-tight for upper and lower insulating board, thus the convex low-altitude thermal baffle required for obtaining.

The one-step method forming step of described two low dead level convex low-altitude thermal baffle is as follows:

By the periphery even spread solder of upper convex surface insulating board, lower convex surface insulating board and middle insulating board solder side, solder evenly leaves several pass through solder band groove or slit as venthole, and three pieces of insulating board consistencies from top to bottom are stacked together, send in high temperature edge sealing stove; Heating makes in-furnace temperature rise to more than the melt temperature of solder, reaches edge sealing temperature, and venthole disappears, and stops heating, with stove cooling, two pieces of insulating boards hermetic weld together by solder, open fire door and obtain required convex low-altitude thermal baffle.

Described high temperature edge sealing stove or the single-unit furnace of batch production, or the tunnel kiln that continous way is produced, preferred tunnel kiln.

Atmosphere in described high temperature edge sealing stove or air, or the neutral atmosphere such as nitrogen, argon gas, preferred argon gas.

When the atmosphere in high temperature edge sealing stove is neutral atmosphere, by transmission and the exchange of gas under high temperature, moisture and oxygen content in the low dead level of low-altitude thermal baffle can be reduced, thus improve the performance of low-altitude thermal baffle further.

When prepare be insulating board containing tempered glass time, preferentially select low-melting-point metal or solder, to select lower edge sealing temperature.

When prepare be containing toughened glass heat-insulation plate time, the problem of annealing because welding temperature is too high, high temperature edge sealing stove can have basic heating system and hot spot system, basis heating system can adopt the mode of resistance heated as heating wire, electrothermal tube, electric hot plate etc., or adopt the mode of circulating air heating, high temperature edge sealing furnace interior and insulating board are heated to a basal temperature and are preferably 280 ~ 320 DEG C; The modes such as recycling resistance heated, infrared heating, LASER HEATING, Electromagnetic Heating, heating using microwave carry out spot heating to the periphery of insulating board and edge sealing position, reach the object at short notice solder being heated to melting.

Adopt the mode of automatic edge sealing in high temperature edge sealing stove, simplify activities, reduce cost of production, shorten the production cycle, improve production efficiency.

Because tempering and semi-tempered glass insulating board have higher intensity than simple glass insulating board, so under identical shape and size, the convex surface bow of tempering or half tempered convex surface insulating board is high can be less, and tempering or half tempered convex surface insulating board can be more flat.Due to utilize there is upper and lower mould moulding form, insulating board is clipped in rely between upper and lower mould and applies pressure forming, so convex surface insulating board has more regular shape, and prevent the distortion in toughening process, so edge sealing is simpler, sealing performance and intensity are also higher.Because high temperature edge sealing stove and accessory has basic heating system and hot spot system, the temperature at insulating board edge can be made to be rapidly heated to welding temperature, and tempering or semi-tempered glass insulating board are under lower basal temperature, in the long period and higher local temperature, obvious annealing phenomena can not occur, so can ensure to obtain tempering or semi-tempered glass insulating board in the shorter time.

In described low dead level, when the planar dimension of upper and lower insulating board is less or high comparatively large, the convex shape that can rely on insulating board self of convex surface bow and intensity opposing atmospheric pressure time, can not supporter be established; When upper and lower insulating board can not rely on self convex shape and intensity opposing atmospheric pressure, should arrange a small amount of necessary supporter, supporter and insulating board cooperatively resist atmospheric pressure.

The material of above support is metal, pottery, glass or solder, is preferably glass or solder.

Above support minimum unit can be the lattice arrangement of equilateral triangle, and the leg-of-mutton length of side is about 30 ~ 300mm, is preferably 50 ~ 150mm; Supporter is strip, its length is 0.3 ~ 5.0mm, is preferably 0.5 ~ 2.0mm, width is 0.1 ~ 2.0mm, is preferably 0.2 ~ 1.0mm, be highly 0.1 ~ 10.0mm, be preferably 0.5 ~ 3.0mm, the height of supporter is higher than the height 0.1 ~ 2.0mm of edge band frame, preferably 0.1 ~ 0.5mm; Supporter also can be cylindric, its diameter is 0.1 ~ 3.0mm, is preferably 0.3 ~ 2.0mm, be highly 0.1 ~ 5.0mm, be preferably 0.5 ~ 3.0mm, the height of supporter closes sheet rear support thing position spatial altitude 0 ~ 0.3mm higher than upper and lower two pieces of insulating boards, is preferably 0.1 ~ 0.2mm.

Supporter preferably adopts cryogenic glass powder or solder to utilize printing technology to make, or utilizes mould directly to squeeze on insulating board.

When supporter is printed on one piece of insulating board, preferably cylindric; When supporter is printed on upper and lower two pieces of insulating boards simultaneously, be preferably strip.

When supporter is printed before glass plate tempering, preferred cryogenic glass powder is made; When supporter is printed after glass plate tempering, preferred low temperature glass solder is made.

When upper and lower insulating board all has a strip supporter, supporter vertical pile supports, upper and lower insulating board is still point cantact by supporter, and between supporter and insulating board, be linear contact lay, increase contact area, reduce the tensile stress of insulating board in support place, so the quantity of supporter can be reduced, thus improve the heat insulation and sound insulation value of insulating board further.

The shape and size of described low-altitude thermal baffle are determined by the purposes of low-altitude thermal baffle, and under the prerequisite meeting instructions for use, its shape is preferably square or circular.

The periphery of one piece of insulating board is had at least at least containing an edge band frame in described upper and lower insulating board.

The height of described edge band frame is preferably 0.1 ~ 10mm, more preferably 0.1 ~ 1mm, and width is preferably 0.2 ~ 5mm, more preferably 1 ~ 2mm.

Described edge band frame can leave several venthole, namely perpendicular to edge band frame and along the equally distributed groove of edge band frame or slit, quantity is determined by the girth of upper and lower insulating board, and spacing about 50 ~ 150mm is advisable, and can close described venthole after described solder fusing; Also can not reserve pore, the passage that the space utilizing the rough surface of solder of coating to be formed is discharged as gas between insulating board, but leave upper insulating board contingent displacement when venthole can prevent that when gases are heated, they expand.

When only containing an edge band frame, described solder is in the outside of described edge band frame, when containing multiple edge band frame, described solder is in the centre of described edge band frame or middle and outside, described edge band frame is when having the upper surface of middle insulating board of convex surface insulating board of two low dead levels, identical with described lower insulating board, when the soffit of described middle insulating board, identical with described upper insulating board.

When only containing an edge band frame, the periphery of preferred described lower insulating board contains an edge band frame, the periphery edge of edge band frame and described lower insulating board has the space of 5mm ~ 10mm, for being coated with described solder, described edge band frame is when having the upper surface of middle insulating board of convex surface insulating board of two low dead levels, identical with described lower insulating board, when the soffit of described middle insulating board, identical with described upper insulating board.

When upper insulating board and lower insulating board are respectively containing an edge band frame, the shape of two edge band frames and size or identical or different, be preferably shape identical, vary in size, now, little edge band frame is included in large edge band frame, described edge band frame is when having the upper surface of middle insulating board of convex surface insulating board of two low dead levels, identical with described lower insulating board, when the soffit of described middle insulating board, identical with described upper insulating board.

Further, more than the edge band frame of described upper insulating board one of the edge band frame of described lower insulating board, namely described upper insulating board is at least containing an edge band frame, described lower insulating board is at least containing two edge band frames, the edge band frame of described upper insulating board is inserted in the middle of the edge band frame of described lower insulating board, the edge band frame of described upper and lower insulating board is entrenched togather mutually, labyrinth sealing is carried out to low dead level, described edge band frame is when having the upper surface of middle insulating board of convex surface insulating board of two low dead levels, identical with described lower insulating board, when the soffit of described middle insulating board, identical with described upper insulating board.

The introducing of edge band frame not only can limit solder and dissolve rear random flowing, makes edge sealing neatly good-looking, and play good supporting role, the thickness making solder keep certain, reinforced seal effect, the more important thing is that its heating-up temperature is high, have bond more reliably with upper and lower insulating board, rough surface, to have with solder and be more firmly combined, thus improve tightness and the reliability of low-altitude thermal baffle.

Adopt edge band frame, can be easy to utilize low-melting-point metal or alloy to realize the solder bonding metal of low-altitude thermal baffle, because the selectable scope of brazing temperature is very large, so not only can overall heat insulating plate, reduce heating furnace cost and simplify production technology, and significantly can reduce edge sealing temperature, shortening heat time, thus reduce cost of production, enhance productivity, the more important thing is and ensure that tempering or semi-tempered glass insulating board annealing phenomena can not occur in heating process.

Described edge band frame is made by the mode of squeezing, etching or printing, and described edge band frame comprises fin and groove, and preferably employing mould squeezes or print the fin that cryogenic glass powder is made.

Described squeezing mode dull and stereotyped insulating board or its raw material is loaded inner surface with in the mold cavity of depression or protruding lines, applies pressure, form fin and groove at the periphery of dull and stereotyped insulating board under high temperature or normal temperature to dull and stereotyped insulating board or its raw material.

Described etching mode is known prior art, utilize method for printing screen acid-proof ink is printed on dull and stereotyped insulating board do not need etch place, erode away groove with corrosive acids such as hydrofluoric acid by dull and stereotyped insulating board there is no acid-proof ink place.

Described mode of printing is the method adopting serigraphy or mould printing or printer, cryogenic glass powder or solder is imprinted on the fin dull and stereotyped insulating board being formed and is raised in dull and stereotyped insulating board surface.

When described edge band frame adopts printing to prepare, can be one-step print, also can be repeatedly print.

After the edge band frame of upper and lower insulating board is chimeric mutually, not only reduce the consumption of edge sealing solder, reduce requirement to solder, and increase inner liner thickness, improve the sealing strength of upper and lower insulating board, the more important thing is the buckling deformation that can solve because toughened glass heat-insulation plate produces in toughening process and the sealing problem brought, thus improve the qualification rate of product.

When preparation is toughened glass heat-insulation plate, is the problem of annealing because welding temperature is too high when solving toughened glass heat-insulation plate edge sealing, can adopts low-melting-point metal or solder.

Described low-melting-point metal or solder can be tin or ashbury metal, zinc or kirsite, aluminum or aluminum alloy, magnesium or magnesium alloy etc.

Present invention also offers a kind of convex low-altitude thermal baffle, it comprises: upper insulating board, lower insulating board, the periphery of described upper insulating board and described lower insulating board is welded together by solder, the low dead level that between described upper insulating board and described lower insulating board, formation one is closed, described upper insulating board and described lower insulating board are convex surface insulating boards, convex surface facing outside;

The described preparation method with the convex low-altitude thermal baffle of a closed low dead level is as follows:

Present invention also offers a kind of convex low-altitude thermal baffle, it comprises: upper insulating board, lower insulating board and middle insulating board, described middle insulating board is clipped between described upper insulating board and described lower insulating board, described upper insulating board and described lower insulating board form two closed low dead levels respectively with described middle insulating board, the periphery of described upper insulating board, described lower insulating board and described middle insulating board is welded together by solder, described upper insulating board and described lower insulating board are convex surface insulating boards, convex surface facing outside;

Described there is the convex low-altitude thermal baffle of two closed low dead levels preparation method and the described preparation method with the convex low-altitude thermal baffle of a closed low dead level similar.

Present invention also offers a kind of preparation method with the convex low-altitude thermal baffle of a low dead level, it comprises:

Present invention also offers a kind of insulating board at least containing one block of convex surface tempered glass, it comprises: upper insulating board, lower insulating board, the periphery of described upper insulating board and described lower insulating board is welded together by solder, the low dead level that between described upper insulating board and described lower insulating board, formation one is closed, described upper insulating board and described lower insulating board are convex surface insulating boards, convex surface facing outside;

The described insulating board preparation method at least containing one block of convex surface tempered glass with a closed low dead level is as follows:

Described basic heating-up temperature range preferably from 280 ~ 320 DEG C, melt temperature range preferably from 380 ~ 470 DEG C.

Present invention also offers a kind of insulating board at least containing one block of convex surface tempered glass, it comprises: upper insulating board, lower insulating board and middle insulating board, described middle insulating board is clipped between described upper insulating board and described lower insulating board, described upper insulating board and described lower insulating board form two closed low dead levels respectively with described middle insulating board, the periphery of described upper insulating board, described lower insulating board and described middle insulating board is welded together by solder, described upper insulating board and described lower insulating board are convex surface insulating boards, convex surface facing outside;

The described preparation method with the insulating board at least containing one block of convex surface tempered glass of two closed low dead levels is similar with the described preparation method at least containing the insulating board of one block of convex surface tempered glass with a closed low dead level.

The present invention is also supplied to a kind ofly has at least as follows containing the insulating board preparation method of one block of convex surface tempered glass of a low dead level:

Below adopt embodiment and accompanying drawing to describe embodiments of the present invention in detail, to the present invention, how application technology means solve technical problem whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.

Embodiment 1: see Fig. 1, low-altitude thermal baffle is made up of upper convex glass insulating board 1 and lower convex glass insulating board 2, wherein one block of glass is the low emissivity glass being coated with aluminium film, and the periphery of two pieces of insulating boards is welded together by low temperature glass solder 3, and centre is low dead level.Its preparation method is as follows: first according to the shape of made low-altitude thermal baffle and two blocks of sheet glass of size preparation required size, and carry out edging, chamfering, cleaning, drying; Secondly two pieces of glass plates are loaded mould, are placed in bending furnace, be warming up to the temperature 550-750 DEG C of Glass Transition, rely on the gravity of glass self to make glass plate form convex surface downwards, and be down to room temperature with stove; Again by the periphery even spread low temperature glass solder of two pieces of glass plates or one piece of glass plate, low temperature glass solder evenly leaves several venthole, and two pieces of glass plate consistencies from top to bottom are stacked together, send in high temperature edge sealing stove; Be warming up to the melt temperature more than 450 DEG C of low temperature glass solder, venthole disappears, and stops heating, with stove cooling, two pieces of insulating boards hermetic weld together by low temperature glass solder, open fire door and obtain required low-altitude thermal baffle.

Embodiment 2: see Fig. 1, low-altitude thermal baffle is made up of upper convex surface ceramic heat-insulation board 1 and lower convex surface ceramic heat-insulation board 2, and the periphery of two pieces of insulating boards is welded together by refractory ceramics glaze 3, and centre is low dead level.Its preparation method is as follows: first prepare metal stamping die according to the shape of made low-altitude thermal baffle and size; Secondly the raw material making ceramic heat-insulation board is loaded in mould, and through press extrusion forming, open the base substrate that mould obtains ceramic heat-insulation board, be placed in drier dry; Again by the two sides of the base substrate of two pieces of ceramic wafers or one side and the periphery even spread refractory ceramics glaze of solder side, periphery glaze on solder side evenly leaves several venthole, and the base substrate consistency from top to bottom of two pieces of ceramic wafers is stacked together, send in high temperature edge sealing stove; Be warming up to the melt temperature more than 1250 DEG C of ceramic post sintering and glaze, venthole disappears, and stops heating; With stove cooling, two pieces of insulating boards hermetic weld together by refractory ceramics glaze, open fire door and obtain required low-altitude thermal baffle.

The sintering of ceramic wafer and the sealed junction of insulating board are combined by the present invention, both simplify technological process, turn improve production efficiency, reduce cost of production.

Embodiment 3: see Fig. 1, two pieces of insulating boards are toughened glass heat-insulation plate or semi-tempered glass insulating board, wherein one piece or low emissivity glass sheet, its preparation method is as follows: the one flat plate glass plate and the one piece of low emissivity glass sheet that first prepare required size according to the shape of made low-altitude thermal baffle and size, and carry out edging, chamfering, cleaning, drying; Secondly two pieces of glass plates are respectively charged in two moulding forms, this moulding form has mold and bed die (i.e. formpiston and former), glass plate is clipped between mold and bed die, and can exert pressure make upper and lower mould close, the moulding form that glass plate is housed is placed in bending furnace, be warming up to the temperature 650 DEG C that glass plate is softening, the pressure put on moulding form is relied on to make the glass plate in moulding form form convex surface, remove mold immediately and carry out wind-cooling reinforcing, obtaining tempering or semi-tempered glass glass plate; Again by the periphery even spread low temperature glass solder of two pieces of glass plates or one piece of glass plate, low temperature glass solder evenly leaves several venthole, and two pieces of glass plate consistencies from top to bottom are stacked together, send in high temperature edge sealing stove, high temperature edge sealing stove and accessory has basic heating system and hot spot system; First basic heating system heats is utilized, after basal temperature rises to 300 DEG C, low temperature glass solder is heated to melt temperature more than 450 DEG C by recycling hot spot system such as far infra-red heater, venthole disappears, two pieces of glass plates bond together by the low temperature glass solder of melting, stop heating, with stove cooling, two pieces of glass plates hermetic weld together by low temperature glass solder, open fire door and obtain required low-altitude thermal baffle.

Because tempering and semi-tempered glass insulating board have higher intensity than simple glass plate, so under identical shape and size, the convex curvature of tempering or half tempered convex surface insulating board can be larger.Owing to utilizing the upper and lower die pressure of moulding form shaping, so convex surface insulating board has more regular shape, and prevent the distortion in toughening process, so edge sealing is simpler, sealing performance and intensity are also higher.Because high temperature edge sealing stove and accessory has basic heating system and hot spot system, the temperature at insulating board edge can be made to be rapidly heated to welding temperature, and tempering or semi-tempered glass insulating board are under lower basal temperature, in the long period and higher local temperature, obvious annealing phenomena can not occur, so can ensure to obtain tempering or semi-tempered glass insulating board in the shorter time.

Embodiment 4: see Fig. 2, two pieces of insulating boards are toughened glass heat-insulation plate or semi-tempered glass insulating board, wherein one piece or low emissivity glass sheet, one piece of glass plate also has edge band frame wherein, its preparation method is as follows: the one flat plate glass plate and the one piece of low emissivity glass sheet that first prepare required size according to the shape of made low-altitude thermal baffle and size, carry out edging, chamfering, cleaning, after drying, on one piece of glass plate, preferred lower glass plate utilizes printing technology that cryogenic glass powder cream is printed to edge band frame wherein, the width of edge band frame is 1.2mm, be highly 0.7mm, the distance of 7mm is had with the edge of glass plate, other are all same as embodiment 3.

The introducing of edge band frame not only can limit low temperature glass solder and dissolve rear random flowing, makes edge sealing neatly good-looking, and play good supporting role, the thickness making low temperature glass solder keep certain, reinforced seal effect, the more important thing is that its heating-up temperature is high, have bond more reliably with upper and lower insulating board, rough surface, to have with low temperature glass solder and be more firmly combined, thus improve tightness and the reliability of low-altitude thermal baffle.

Embodiment 5: see Fig. 3, low-altitude thermal baffle is made up of upper convex surface ceramic heat-insulation board and lower convex surface ceramic heat-insulation board, and the periphery of two pieces of insulating boards all has edge band frame, and the periphery of two pieces of insulating boards is welded together by low temperature glass solder, and centre is low dead level.Its preparation method is as follows: the metal stamping die first preparing upper and lower insulating board according to the shape of made low-altitude thermal baffle and size respectively, the periphery of mould is fluted, to form the edge band frame on insulating board, wherein go up that insulating board has an edge band frame, lower insulating board has two edge band frames, the size of upper insulating board edge band frame is between lower insulating board two edge band frames, after upper and lower insulating board closes sheet, the edge band frame of upper insulating board can be embedded between two edge band frames of lower insulating board, secondly the raw material making ceramic heat-insulation board is loaded in mould, and through press extrusion forming, open the base substrate that mould obtains ceramic heat-insulation board, be placed in drier dry, then by the two sides of the base substrate of two pieces of ceramic wafers or an even spread refractory ceramics glaze, send into respectively in high temperature sintering furnace, be warming up to the melt temperature more than 1250 DEG C of ceramic post sintering and glaze, stop heating, with stove cooling, obtain the upper and lower convex surface ceramic heat-insulation board with edge band frame, again evenly fill low temperature glass solder by between two of lower insulating board edge band frames, and two pieces of insulating board consistencies from top to bottom are stacked together, send in high temperature edge sealing stove, utilize the heating system of high temperature edge sealing stove that the low temperature glass solder in edge band frame is heated to melt temperature more than 450 DEG C, the edge band frame of upper insulating board embeds between two edge band frames of lower insulating board under gravity, two pieces of insulating boards bond together by the low temperature glass solder of melting, stop heating, lower the temperature with stove, two pieces of insulating boards hermetic weld together by low temperature glass solder, open fire door and obtain required low-altitude thermal baffle.

Embodiment 6: see Fig. 4, low-altitude thermal baffle is made up of the outer flat ceramic heat-insulation board of upper indent and the outer flat ceramic heat-insulation board of lower indent, the concave surface of wherein one piece of insulating board is coated with aluminium film, the periphery of two pieces of insulating boards all has edge band frame, the periphery of two pieces of insulating boards is welded together by solder, and centre is low dead level.Its preparation method is as follows: the metal stamping die first preparing upper and lower insulating board according to the shape of made low-altitude thermal baffle and size respectively, the periphery of mould is fluted, to form the edge band frame on insulating board, wherein go up that insulating board has an edge band frame, lower insulating board has two edge band frames, the size of upper insulating board edge band frame is between lower insulating board two edge band frames, after upper and lower insulating board closes sheet, the edge band frame of upper insulating board can be embedded between two edge band frames of lower insulating board; Secondly the raw material making ceramic heat-insulation board is loaded in mould, and through press extrusion forming, open the base substrate that mould obtains ceramic heat-insulation board, be placed in drier dry; Then by the two sides of the base substrate of two pieces of ceramic wafers or an even spread refractory ceramics glaze, send into respectively in high temperature sintering furnace; Be warming up to the melt temperature more than 1250 DEG C of ceramic post sintering and glaze, stop heating; With stove cooling, obtain the outer flat ceramic heat-insulation board of upper and lower indent with edge band frame, plated aluminum film on the concave surface of one piece of insulating board wherein subsequently, forms Low emissivity insulating board; Again will fill brazing metal glass putty between two of lower insulating board edge band frames or spread tinfoil paper or tin silk, and two pieces of insulating board consistencies from top to bottom are stacked together, and leave certain space of giving vent to anger, send in high temperature edge sealing stove; Be warming up to more than the melting temperature of metallic tin as 240 DEG C, metallic tin will melt, and two edge band frames of upper insulating board embed between three edge band frames of lower insulating board under gravity, and two pieces of insulating boards bond together by the metallic tin of melting; Stop heating, with stove cooling, two pieces of insulating boards hermetic weld together by brazing metal tin, open fire door and obtain required low-altitude thermal baffle.

Adopt edge band frame, can be easy to utilize low-melting-point metal or alloy to realize the solder bonding metal of low-altitude thermal baffle, because the selectable scope of brazing temperature is very large, so not only can overall heat insulating plate, reduce heating furnace cost and simplify production technology, and can significantly reduce edge sealing temperature, shorten the heat time, thus reduce cost of production, enhance productivity.

Embodiment 7: see Fig. 5, in two pieces of insulating boards, one piece is ceramic heat-insulation board, another block is the low emissivity glass insulating board being coated with aluminium film, two pieces of insulating boards all has edge band frame, its preparation method is as follows: first according to the shape of made low-altitude thermal baffle and one piece of low emissivity glass insulating board of size preparation required size, carry out edging, chamfering, after cleaning, drying, glass heat-proof plate utilizes printing technology cryogenic glass powder cream is printed to edge band frame, the metal stamping die of ceramic heat-insulation board is prepared according to the shape of made low-altitude thermal baffle and size, the periphery of mould is fluted, to form the edge band frame on insulating board, wherein go up that insulating board has an edge band frame, lower insulating board has two edge band frames, the size of upper insulating board edge band frame is between lower insulating board two edge band frames, after upper and lower insulating board closes sheet, the edge band frame of upper insulating board can be embedded between two edge band frames of lower insulating board, secondly glass heat-proof plate is loaded mould, is placed in bending furnace, be warming up to the temperature that glass heat-proof plate is softening, the gravity of glass heat-proof plate self is relied on to make glass heat-proof plate form convex surface downwards, edge band frame is also in softening molten condition and glass heat-proof plate is bonded together, carry out wind-cooling reinforcing immediately, obtain the tempering with edge band frame or semi-tempered glass insulating board, the raw material making ceramic heat-insulation board is loaded in mould, and through press extrusion forming, opens the base substrate that mould obtains ceramic heat-insulation board, be placed in drier dry, then by the two sides of the base substrate of ceramic wafer or an even spread refractory ceramics glaze, send in high temperature sintering furnace respectively, be warming up to the melt temperature more than 1250 DEG C of ceramic post sintering and glaze, stop heating, with stove cooling, obtain the ceramic heat-insulation board with edge band frame, again evenly fill low temperature glass solder by between two of lower insulating board edge band frames, and on upper or lower insulating board, adopt low temperature glass solder to print supporter, supporter is the lattice arrangement parallel with edge band frame, distance between 2 is 150mm, supporter is cylindric, its diameter is 1.2mm, highly for 2.0mm, the height of supporter closes sheet rear support thing position spatial altitude 0.1mm higher than upper and lower two pieces of insulating boards, be stacked together by two pieces of insulating board consistencies from top to bottom, send in high temperature edge sealing stove, high temperature edge sealing stove and accessory has basic heating system and hot spot system, first basic heating system heats is utilized, after basal temperature rises to the softening sintering temperature 300 DEG C of supporter, low temperature glass solder in edge band frame is heated to melt temperature as more than 450 DEG C by recycling hot spot system such as far infra-red heater, the edge band frame of upper insulating board embeds between two edge band frames of lower insulating board under gravity, two pieces of insulating boards bond together by the low temperature glass solder of melting, supporter is also sintered together with upper and lower two pieces of insulating boards, stop heating, lower the temperature with stove, two pieces of insulating boards hermetic weld together by low temperature glass solder, open fire door and obtain required low-altitude thermal baffle.

Supporter adopts low temperature glass solder to make, and has lower sintering temperature, makes it can sinter in edge sealing process, and by means of its slightly high height, upper and lower insulating board reliably can be bonded together, thus play effective supporting role; The existing outward appearance being similar to dull and stereotyped insulating board of the curved surface that curvature is larger has again the intensity higher than dull and stereotyped insulating board, thus greatly can reduce the quantity reducing supporter, improves the heat insulation and sound insulation value of insulating board further.

Embodiment 8: see Fig. 6, low-altitude thermal baffle is made up of upper convex surface ceramic heat-insulation board and lower convex surface ceramic heat-insulation board, the concave surface of wherein one piece of insulating board is coated with aluminium film, two pieces of insulating boards all there are edge band frame and supporter, the periphery of two pieces of insulating boards is welded together by solder, and centre is low dead level.Its preparation method is as follows: the metal stamping die first preparing upper and lower insulating board according to the shape of made low-altitude thermal baffle and size respectively, fluted on mould, to form edge band frame on insulating board and supporter, wherein go up that insulating board has an edge band frame, lower insulating board has two edge band frames, the size of upper insulating board edge band frame is between lower insulating board two edge band frames, after upper and lower insulating board closes sheet, the edge band frame of upper insulating board can be embedded between two edge band frames of lower insulating board; Secondly the raw material making ceramic heat-insulation board is loaded in mould, and through press extrusion forming, open the base substrate that mould obtains ceramic heat-insulation board, be placed in drier dry; Then by the two sides of the base substrate of two pieces of ceramic wafers or an even spread refractory ceramics glaze, send into respectively in high temperature sintering furnace; Be warming up to the melt temperature more than 1250 DEG C of ceramic post sintering and glaze, stop heating; With stove cooling, obtain the upper and lower convex surface ceramic heat-insulation board with edge band frame and supporter, plated aluminum film on the concave surface of one piece of insulating board wherein subsequently, forms Low emissivity insulating board; Again will fill metal alloy solder Zinc alloy powder between two of lower insulating board edge band frames or spread kirsite paper tinsel or saxonia metal wire, and two pieces of insulating board consistencies from top to bottom are stacked together, send in the edge sealing stove of low latitude; Finally be heated to the melting temperature of kirsite as more than 380 DEG C, kirsite melts, and the edge band frame of upper insulating board embeds between the edge band frame of lower insulating board under gravity, and two pieces of insulating boards bond together by the kirsite of melting; Stop heating, with stove cooling, two pieces of insulating boards hermetic weld together by solder kirsite, open fire door and obtain required low-altitude thermal baffle.

Upper and lower insulating board all has strip supporter, supporter vertical pile supports, upper and lower insulating board is still point cantact by supporter, and between supporter and insulating board, be linear contact lay, increase contact area, reduce the tensile stress of insulating board in support place, so the quantity of supporter can be reduced, thus improve the heat insulation and sound insulation value of insulating board further.

Embodiment 9: see Fig. 7, low-altitude thermal baffle is made up of upper convex glass insulating board, middle ceramic heat-insulation board and lower convex glass insulating board, and the periphery of every two pieces of insulating boards is welded together by low temperature glass solder, and centre is two low dead levels.Its preparation method is as follows: the two blocks of sheet glass plates and the one piece of ceramic wafer that first prepare required size according to the shape of made low-altitude thermal baffle and size, and carries out edging, chamfering, cleaning, dry; Secondly two pieces of glass plates are loaded mould, are placed in bending furnace, be warming up to the temperature that glass plate is softening, rely on the gravity of glass plate self to make glass plate form convex surface downwards, and be down to room temperature with stove; Again by the periphery even spread low temperature glass solder of three pieces of insulating boards or two pieces of insulating boards or middle insulating board solder side, low temperature glass solder evenly leaves several venthole, and three pieces of insulating board consistencies from top to bottom are stacked together, send in high temperature edge sealing stove; Be warming up to the melt temperature more than 450 DEG C of low temperature glass solder, venthole disappears, and stops heating, with stove cooling, two pieces of insulating boards hermetic weld together by low temperature glass solder, open fire door and obtain required low-altitude thermal baffle.

Embodiment 10: see Fig. 8, low-altitude thermal baffle is by upper convex glass insulating board, intermetallic metal insulating board and lower convex glass insulating board composition, on, lower two pieces of insulating boards are toughened glass heat-insulation plate or semi-tempered glass insulating board, wherein one piece is still coated with the low emissivity glass insulating board of aluminium film, three pieces of insulating boards all has edge band frame, its preparation method is as follows: the one flat plate glass plate and the one piece of low emissivity glass sheet that first prepare required size according to the shape of made low-altitude thermal baffle and size, carry out edging, chamfering, cleaning, after drying, the solder side of two pieces of insulating boards utilize printing technology cryogenic glass powder cream is printed to edge band frame, prepare one piece of metal sheet of required size as iron plate, aluminium sheet or corrosion resistant plate etc. according to the shape of made low-altitude thermal baffle and size, after cleaning, drying, the solder side of insulating board utilizes printing technology frit for porcelain enamel is printed to edge band frame, wherein go up insulating board and have an edge band frame, the upper surface of middle insulating board has that two edge band frame soffits have an edge band frame, lower insulating board has two edge band frames, the size of edge band frame is above between the edge band frame of two below, after upper, middle and lower insulating board closes sheet, edge band frame above can be embedded between two edge band frames below, secondly upper and lower two pieces of insulating boards are loaded mould, are placed in bending furnace, be warming up to the temperature that glass plate is softening, the gravity of insulating board self is relied on to make insulating board form convex surface downwards, edge band frame is also in softening molten condition and insulating board is bonded together, carry out wind-cooling reinforcing immediately, obtain the tempering with edge band frame or semi-tempered glass insulating board, middle insulating board directly enters high-temperature tubring stove, obtains the metal heat-insulated plate with edge band frame, again evenly fill low temperature glass solder by between middle insulating board and two edge band frames of lower insulating board, and be stacked together by three pieces of insulating board consistencies from top to bottom, send in high temperature edge sealing stove, high temperature edge sealing stove and accessory has basic heating system and hot spot system, first basic heating system heats is utilized, after basal temperature rises to 300 DEG C, low temperature glass solder in edge band frame is heated to melt temperature more than 450 DEG C by recycling hot spot system such as far infra-red heater, edge band frame above embeds between two edge band frames below under gravity, three pieces of insulating boards bond together by the low temperature glass solder of melting, stop heating, lower the temperature with stove, three pieces of insulating boards hermetic weld together by low temperature glass solder, open fire door and obtain required low-altitude thermal baffle.

All above-mentioned this intellectual properties of primary enforcement, not setting restriction this new product of other forms of enforcement and/or new method.Those skilled in the art will utilize this important information, and foregoing is revised, to realize similar implementation status.But all modifications or transformation belong to the right of reservation based on new product of the present invention.

The above is only preferred embodiment of the present invention, and be not restriction the present invention being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solution of the present invention content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.

Claims

1. a convex low-altitude thermal baffle, comprise insulating board and lower insulating board, it is characterized in that the periphery of the solder side of described upper insulating board and lower insulating board all has edge band frame, described edge band frame is produced on the soffit of described upper insulating board and on the upper surface of described lower insulating board by squeezing, etching or the mode of printing-sintering; The edge band frame of described upper insulating board and lower insulating board can be entrenched togather mutually, forms mazy hermetically-sealed construction to the low dead level of described convex low-altitude thermal baffle; The periphery of described upper insulating board and lower insulating board is welded together in edge sealing stove by the edge band frame that is entrenched togather and solder, the low dead level that between described upper insulating board and described lower insulating board, formation one is closed, air pressure in described low dead level is 0.01-0.09MPa, described upper insulating board and described lower insulating board are convex surface insulating boards, convex surface facing outside.

2. convex low-altitude thermal baffle according to claim 1, it is characterized in that described low dead level be low-altitude thermal baffle at high temperature edge sealing, be down to self-assembling formation after room temperature.

3. convex low-altitude thermal baffle according to claim 1, it is characterized in that described convex low-altitude thermal baffle also comprises one piece of middle insulating board, described middle insulating board is clipped between described upper insulating board and described lower insulating board, and described upper insulating board and described lower insulating board form two closed low dead levels respectively with described middle insulating board.

4. convex low-altitude thermal baffle according to claim 1, is characterized in that described upper and lower insulating board comprises glass plate, ceramic wafer or metal sheet.

5. convex low-altitude thermal baffle according to claim 4, is characterized in that described ceramic wafer is the convex surface insulating board with edge band frame or supporter be made up of diel or slip casting mould.

6. convex low-altitude thermal baffle according to claim 1, it is characterized in that described upper insulating board at least containing an edge band frame, described lower insulating board is at least containing two edge band frames, and the edge band frame of described upper insulating board can be inserted between the edge band frame of described lower insulating board.

7. convex low-altitude thermal baffle according to claim 1, is characterized in that there is supporter in described low dead level, is cylindric when above support is on one piece of insulating board, is strip time on upper and lower two pieces of insulating boards.

8. convex low-altitude thermal baffle according to claim 1, it is characterized in that the convex surface of described upper and lower insulating board bends high is 3 ~ 20mm.

9. the preparation method of the convex low-altitude thermal baffle described in any one of claim 1 to 8, is characterized in that comprising:

3rd step, coating solder: by the solder side periphery even spread solder of insulating board;

4th step, high temperature edge sealing: in high temperature edge sealing stove, two pieces of insulating boards hermetic weld together by solder, obtain required convex low-altitude thermal baffle.

10. the preparation method of the convex low-altitude thermal baffle described in any one of claim 1 to 8, is characterized in that preparation method is as follows when described convex low-altitude thermal baffle contains at least one block of toughened glass heat-insulation plate:

When described insulating board is ceramic wafer, the powder of existing making ceramic wafer or slurry is loaded diel or slip casting mould, prepares the base substrate of ceramic wafer, drying and high temperature sintering, obtain convex surface ceramic wafer;

3rd step, coating solder: the two pieces of insulating boards obtain second step or the solder side periphery even spread solder of one piece of insulating board, solder evenly leaves several venthole, and is stacked together by described two pieces of insulating board consistencies from top to bottom, sends in high temperature edge sealing stove; Described high temperature edge sealing stove and accessory has basic heating system and hot spot system, and basic heating system adopts the mode of resistance heated as heating wire, electrothermal tube or electric hot plate, or adopts the mode of circulating air heating; Hot spot system adopts the mode of resistance heated, infrared heating, LASER HEATING, Electromagnetic Heating or heating using microwave;