CN103420594A - Convex vacuum glass with sealing strips and sealing grooves for sealing edges and opening and preparation method of convex vacuum glass - Google Patents
Convex vacuum glass with sealing strips and sealing grooves for sealing edges and opening and preparation method of convex vacuum glass Download PDFInfo
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- CN103420594A CN103420594A CN2013102989254A CN201310298925A CN103420594A CN 103420594 A CN103420594 A CN 103420594A CN 2013102989254 A CN2013102989254 A CN 2013102989254A CN 201310298925 A CN201310298925 A CN 201310298925A CN 103420594 A CN103420594 A CN 103420594A
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Abstract
The invention provides convex vacuum glass with sealing strips and sealing grooves for sealing edges and an opening comprises upper glass and lower glass, wherein the upper glass and the lower glass are convex glass; an extract opening is formed in the upper glass; the sealing strips are arranged at the peripheries of the upper glass and the extract opening; the sealing grooves and the sealing strips are arranged at the periphery of the lower glass and the corresponding position of the extract opening; the peripheries of the upper glass and the lower glass are welded together through low-temperature glass welding materials in an edge sealing furnace under normal pressure; the extract opening is automatically sealed in a vacuum furnace by adopting metal welding materials; a closed vacuum layer is formed between the upper glass and the lower glass. The convex vacuum glass and the manufacturing method of the vacuum glass provided by the invention are simple in process, the vacuum glass and tempered vacuum glass manufactured through the manufacturing method can overcome the defects in the prior art, the air tightness of the vacuum glass can be guaranteed effectively, and the strength, heat insulation performance and sound insulation performance of the vacuum glass are increased.
Description
Technical field
The present invention relates to glass deep process technology field, relate in particular to convex surface vacuum glass of a kind of seal strip groove edge sealing, sealing and preparation method thereof.
Background technology
Vacuum glass is a kind of novel energy-saving glass, and vacuum glass not only can solve " breathing " problem of the existing a large amount of double glazings that use, and has that the heat-and sound-insulating performance is good, wind pressure resistant strength is high, thickness is little and the advantage such as long service life.Vacuum glass generally consists of two to three sheet glass, between two adjacent sheet glass, forms cavity, at the periphery of glass, is provided with edge sealing structure, and cavity forms vacuum layer after being pumped into vacuum.Vacuum glass is according to the mode difference that forms vacuum layer, can be divided into two kinds, a kind of is vacuum glass without bleeding point, and the edge sealing of this vacuum glass carries out in vacuum oven, along with completing of edge sealing, the cavity self-assembling formation vacuum layer of sealing between two adjacent sheet glass; Another kind is the vacuum glass that bleeding point is arranged, the edge sealing of this vacuum glass carries out in High Temperature Furnaces Heating Apparatus under normal pressure, by prefabricated bleeding point, the cavity sealed between glass is vacuumized again after edge sealing completes, finally, at the end rear enclosed bleeding point of bleeding, complete the making of vacuum glass.
The present patent application people discloses a series of vacuum glass without bleeding point and preparation method thereof in the patent of the vacuum glass of in October, 2012 application, but when utilizing the low temperature glass solder edge sealing, because low temperature glass solder is to be made by many oxide, at high temperature, under vacuum, air and the moisture of scolder absorption, volatile substances in scolder, in the gas that scolder dissolves in process of production and scolder, decomposition of partial oxide etc. all can cause a large amount of bubble of generation in scolder, the properties that has greatly weakened scolder is resistance to air loss especially, cause the feasibility of this kind of mode to be greatly affected.The vacuum glass of existing mass production is all the vacuum glass that bleeding point is arranged, but exists that complex manufacturing technology, extraction temperature low (bleeding not thorough), monolithic vacuumize, cost is high, production capacity is low, can not make the shortcoming such as toughened vacuum glass.
Summary of the invention
Technical problem to be solved by this invention is to be the defect existed for existing bleeding point vacuum glass, convex surface vacuum glass of a kind of seal strip groove edge sealing, sealing and preparation method thereof is provided, the making method technique of this vacuum glass is simple, prepared vacuum glass and toughened vacuum glass can overcome deficiency of the prior art, resistance to air loss and the transparency of vacuum glass can be effectively guaranteed, and its intensity and heat insulation, sound-proofing properties can be increased.
In order to solve the problems of the technologies described above, the invention provides a kind of seal strip groove edge sealing, the convex surface vacuum glass of sealing, comprise upper glass and lower-glass, described upper glass and described lower-glass are convex glasses, on described upper glass, bleeding point is arranged, the periphery of described upper glass and described bleeding point has sealed strip, there are sealed strip and sealing groove in the periphery of described lower-glass and the corresponding position of described bleeding point, the periphery of described upper glass and described lower-glass welds together in normal pressure lower sealing edge stove by low temperature glass solder, described bleeding point utilizes brazing metal self-closed in vacuum oven, form the vacuum layer of a sealing between described upper glass and described lower-glass.
In order to solve the problems of the technologies described above, the invention provides the preparation method of convex surface vacuum glass or convex surface toughened vacuum glass, it comprises:
The first step, according to the shape of the vacuum glass of required making and two flat glasss up and down of size cutting desired size, bleeding point is made in edge punching at upper glass, offer sealing groove at the peripheral weld of lower-glass and the corresponding position of bleeding point, and upper and lower two blocks of glass are carried out to edging, chamfering, cleaning and drying treatment;
Second step, prepare sealed strip at the periphery of upper glass and the periphery of bleeding point and the periphery of sealing groove, the sealed strip of upper glass can insert in corresponding sealing groove, by the upper lower-glass after processing pack into hot bending die, be placed in bending furnace or annealing furnace, be warming up to 550～750 ℃ of the softening temperature of glass, rely on gravity or the externally applied forces of glass self to make glass form convex surface downwards, and be down to room temperature with stove, or directly carry out the tempering processing;
The 3rd step, will evenly be coated with low temperature glass solder in the sealing groove of lower-glass periphery, upper and lower glass is sent in the edge sealing stove after closing sheet;
The 4th step, carry out the heat temperature raising operation to described edge sealing stove, more than being warming up to the melt temperature of low temperature glass solder, reaches the edge sealing temperature, and the sealed strip of upper glass is under the action of gravity of glass in the embedding sealing groove; Stop heating, lower the temperature with stove, low temperature glass solder hermetic welds together two blocks of glass, and the fire door of opening the edge sealing stove obtains double glazing;
The 5th step, pack brazing metal in the bleeding point of double glazing into, and send in vacuum oven; To described vacuum sole vacuumize, limit heating, be evacuated to 0.1Pa following, be warming up to the temperature of fusion of brazing metal more than, brazing metal is fused into liquid, liquid retention is in the sealing groove of lower-glass, the sealed strip of upper glass also is submerged in liquid, and liquid is by the bleeding point self-sealing; Stop heating, with stove cooling, brazing metal solidifies realizes airtight sealing afterwards to bleeding point, opens vacuum oven, takes out vacuum glass;
The 6th step is put into seal gum in the bleeding point of vacuum glass, Paste Product trade mark or metal finishing sheet on seal gum.
Wherein, toward the outer side, the high 0.1mm that is not less than of convex surface bow, be preferably 1 ~ 200mm, more preferably 3 ~ 10mm to the convex surface of described convex glass.
Wherein, the periphery of the periphery of described upper glass or bleeding point has a sealed strip at least.
Wherein, the corresponding position of the periphery of described lower-glass or bleeding point has a sealing groove and a sealed strip at least.
Wherein, the sealed strip of described upper glass is corresponding with the sealing groove of described lower-glass, and the sealed strip of described upper glass can insert in the sealing groove of described lower-glass.
Wherein, described vacuum glass can also comprise an intermediate glass, described intermediate glass is clipped between described upper glass and described lower-glass, on described upper glass and described intermediate glass, bleeding point is arranged, described bleeding point utilizes brazing metal self-closed in vacuum oven, and described upper glass and described lower-glass form respectively the vacuum layer of two sealings with described intermediate glass.
Wherein, described upper glass, described intermediate glass and described lower-glass are simple glass or toughened glass or semi-tempered glass.
Wherein, described upper glass, described intermediate glass and described lower-glass are simple glass or coated glass or Low-E glass.
Wherein, described sealed strip adopts printing, printing or mechanically spraying cryogenic glass powder or the modes such as glass ink or metal paste to prepare.
Wherein, described sealing groove is formed by mechanical workout or laser processing, and the preferred mechanical processing mode, as mechanical mill, mechanical cutting etc.
Wherein, the internal surface of the sealing groove of described lower-glass bleeding point corresponding position can the paint metals slurry, and metal paste contributes to combining closely of brazing metal and glass.
Wherein, described brazing metal comprises low-temperature metal scolder and solder, and described material is existing commercial commodity.
Further, the fusing point of described brazing metal is lower than the fusing point of low temperature glass solder, and during the brazing metal fusing, the low temperature glass solder of edge sealing remains unchanged.
Further, described brazing metal is shaped as powdery, strip, sheet or bulk, ring-type, tubulose etc.
Wherein, in the vacuum layer of described convex surface vacuum glass not or have a small amount of upholder, convex surface vacuum glass mainly to rely on convex shape to resist barometric point.
Wherein, above support is made by metal, pottery, glass or high molecular polymer, matrix material, preferably adopts printing, sprayed glass printing ink or polymkeric substance preparation.
Wherein, above support has one deck or two-layer; Above support be printed on one on glass, or be printed on two on glass, conventional vacuum glass preferably be printed on one on glass, toughened vacuum glass preferably be printed on two on glass.
Wherein, above support is column, or is strip; When upholder is printed on one when on glass, be preferably cylindric; When upholder is printed on two when on glass simultaneously, be preferably strip, and vertical pile.
Wherein, described edge sealing stove can once heat one to the several piece vacuum glass.
Wherein, described edge sealing stove has basic heating system and local heating system when heating toughened glass, the mode that the basis heating system can adopt Hot-blast Heating or resistive heating is as nichrome wire, electrothermal tube, hot plate etc., and the local heating system can adopt the modes such as resistive heating, infrared heating, LASER HEATING, Electromagnetic Heating, microwave heating;
Further, the heating of described basis, be that burner hearth or bulk glass are heated to a lower temperature, as 300 ~ 350 ℃, can not cause toughened glass obviously to be annealed;
Further, described local heating, be that scolder or glass periphery are heated to a higher temperature, as 400 ~ 450 ℃, prevents the whole obviously annealing of toughened glass;
Wherein, described vacuumizing and the bleeding point sealing can be carried out in batches in vacuum oven, also can implement by monolithic; Can wholely heat glass, also can the local heating bleeding point.
Wherein, described vacuum oven heating, can adopt conventional heating, Infrared Heating, also can adopt induction heating, LASER HEATING, can also adopt microwave heating and other suitable heating unit or heater means.
Further, described heating, can heat bulk glass, also can the local heating bleeding point.
Wherein, described seal gum preferably has secret sealing, more preferably hot melt adhesive, hot-setting adhesive or two component sealing gum.
Beneficial effect of the present invention:
Seal strip groove edge sealing of the present invention, the periphery of its upper glass of convex surface vacuum glass of sealing and the periphery of bleeding point have sealed strip, there are sealing groove and sealed strip in the periphery of lower-glass and the corresponding position of bleeding point, make edge sealing and the sealing of vacuum glass easier, more reliable, even the chimeric of sealed strip and sealing groove guaranteed vacuum glass in the situation that the sealing effectiveness of glass deformation, there is the bonding strength higher than low temperature welding glass between sealed strip and upper lower-glass, chimeric sealing surface area and the airtight layer thickness increased between upper lower-glass of sealed strip and sealing groove, chimeric automatic-sealed and the mass sealing that has realized bleeding point of sealed strip and sealing groove, under normal pressure under low temperature glass solder edge sealing and vacuum brazing metal sealing solved the airtight integrity problem of scolder, increased the tightness of vacuum layer between upper and lower glass, improved the life-span of vacuum glass, greatly improved vacuum glass productivity and qualification rate, reduced the production cost of vacuum glass.
The accompanying drawing explanation
Fig. 1 is the convex surface vacuum glass structural representation that upholder is arranged of the present invention;
Fig. 2 is convex surface vacuum glass structural representation of the present invention;
The convex surface vacuum glass structural representation that Fig. 3 is of the present invention pair of vacuum layer.
In figure: 1. upper glass, 2. lower-glass, 3. bleeding point, 4. low temperature glass solder, 5. sealed strip, 6. sealing groove, 7. brazing metal, 8. upholder, 9. intermediate glass, 10. seal gum, 11. product brands.
Embodiment
Below adopt embodiment and accompanying drawing to describe embodiments of the present invention in detail, to the present invention, how the utilisation technology means solve technical problem whereby, and the implementation procedure of reaching technique effect can fully understand and implement according to this.
Embodiment 1: referring to Fig. 1, vacuum glass is comprised of upper glass 1 and lower-glass 2, and the periphery of two blocks of glass welds together by low temperature glass solder 4, and centre is vacuum layer.Its making method is as follows: at first according to the shape of made vacuum glass and two flat glasss of size cutting desired size, boring a through hole at the edge of upper glass 1 is bleeding point 3, offer sealing groove 6 at the periphery of lower-glass 2 and the corresponding position of bleeding point 3, and carry out edging, chamfering and cleaning, drying, at the peripheral weld of upper glass 1, the periphery of bleeding point 3 and the periphery of lower-glass sealing groove, utilize the mechanically spraying technology to prepare sealed strip 5, and with point gum machine at upper and lower glass preparation upholder 8; Secondly upper and lower two blocks of glass are packed into mould, be placed in bending furnace, be warming up to the softening temperature 550-750 ℃ of glass, rely on the gravity of glass self to make glass form convex surface downwards, be down to room temperature with stove, and make upholder 8 in the same level height by the plane lapping method; Again low temperature glass solder 4 will evenly be coated with in the sealing groove 6 of lower-glass 2 peripheries, and two glass consistencies from top to bottom are stacked together, send in the edge sealing stove, be warming up to the melt temperature of low temperature glass solder 4 more than 450 ℃, stop heating, lower the temperature with stove, low temperature glass solder 4 hermetic welds together two blocks of glass; The metallic zinc scolder 7 of finally packing in bleeding point 3, send in vacuum oven, vacuumized and heating operation, be evacuated to below 0.1Pa, be warming up to the melt temperature of metallic zinc scolder 7 more than 420 ℃, metallic zinc scolder 7 is fused into liquid retention in sealing groove 6, the sealed strip 5 of upper glass also is submerged in liquid, and liquid is by the bleeding point self-sealing; Stop heating, lower the temperature with stove, metallic zinc scolder 7 condenses into solid, and bleeding point is realized to airtight sealing, opens vacuum oven, takes out vacuum glass.Put into while hot seal gum 10 as butyl rubber in bleeding point, the top covering product brand 11 of seal gum 10, the upper surface flush of trade mark 11 and upper glass 1.
Embodiment 2: referring to Fig. 2, vacuum glass is comprised of upper glass 1 and lower-glass 2, two blocks of glass are toughened glass or semi-tempered glass, wherein one or low emissivity glass, its making method is as follows: at first according to the shape of made vacuum glass and a flat glass and a low emissivity glass of size cutting desired size, selecting low emissivity glass is lower-glass 2, boring a through hole at the edge of upper glass 1 is bleeding point 3, offer sealing groove 6 at the periphery of lower-glass 2 and the corresponding position of bleeding point 3, and carry out edging, chamfering and cleaning, dry, peripheral weld at upper glass 1, on the periphery of bleeding point 3 and lower-glass 2, the periphery of sealing groove 6 utilizes screen printing technique to print sealed strip, secondly two blocks of glass are respectively charged in two forming moulds, this forming mould has mold and bed die (being formpiston and former), glass clamp is between mold and bed die, and can exert pressure and make upper and lower mould closure, the forming mould that glass is housed is warming up to the softening temperature 650-700 ℃ of glass, dependence puts on pressure on forming mould makes the glass in forming mould form convex surface, removes immediately the mold cold tempering of sector-style of going forward side by side, and obtains tempering or semi-tempered glass, again by the interior even coating low temperature glass solder 4 of the sealing groove 6 of lower-glass 2 peripheries, and two glass consistencies from top to bottom are stacked together, send in the edge sealing stove, the edge sealing stove and accessory has basic heating system and local heating system, first utilize basic heating system as electric heater for heating, make basal temperature rise to 300 ~ 350 ℃, recycling local heating system is heated to 430 ~ 450 ℃ of melt temperatures as far infra-red heater by low temperature glass solder, and the low temperature glass solder 4 of melting by two glass cementations together, stop heating, lower the temperature with stove, low temperature glass solder 4 hermetic welds together two blocks of glass, finally carry out the sealing of bleeding point 3, with embodiment 1, just brazing metal 7 changes metallic tin into.
Embodiment 3: referring to Fig. 3, vacuum glass is comprised of upper convex glass 1, intermediate glass 9 and lower convex glass 2.Its making method is as follows: at first according to the shape of the vacuum glass of required making and three flat glasss of size cutting desired size, bore respectively a through hole and form bleeding point 3 on upper glass 1 and intermediate glass 9, wherein the through hole on upper glass 1 is greater than the through hole on intermediate glass 9, offer sealing groove 6 at the upper surface periphery of intermediate glass 9 and lower-glass 2 and periphery and the corresponding position of bleeding point 3, and three blocks of glass are carried out to edging, chamfering, cleaning, drying treatment; Secondly prepare sealed strip 5 in the lower surface periphery of upper glass 1 and intermediate glass 9, the periphery of bleeding point 3 and the periphery spraying of corresponding position and sealing groove 6, intermediate glass 9 is directly sent in annealing furnace and carried out the tempering processing, upper and lower two blocks of glass are packed in mould, be warming up to 550～750 ℃ of the softening temperature of glass, rely on gravity or the externally applied forces of glass self to make glass form convex surface downwards, and carry out the tempering processing immediately; Again will in the peripheral sealing groove 6 of intermediate glass 9 and lower-glass 2, fill low temperature glass solder 4, and described three glass consistencies from top to bottom are stacked together, guarantee that the sealed strip 5 on upper glass 1 and intermediate glass 9 lower surfaces is corresponding with sealing groove 6, send in the edge sealing stove; Finally carry out the sealing of edge sealing and bleeding point 3, with embodiment 2, just brazing metal 7 changes magnesium alloy into.
All above-mentioned these intellecture properties of primary enforcement, do not set restriction this product innovation of other forms of enforcement and/or novel method.The modification of those skilled in the art based on foregoing, can realize similar implementation status.But all modifications or transformation belong to the right of reservation based on product innovation of the present invention.
The above, be only preferred embodiment of the present invention, is not the present invention to be done to the restriction of other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not break away from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (10)
1. a seal strip groove edge sealing, the convex surface vacuum glass of sealing, it is characterized in that: comprise upper glass and lower-glass, described upper glass and described lower-glass are convex glasses, described upper glass and described lower-glass are simple glass or toughened glass or semi-tempered glass, on described upper glass, bleeding point is arranged, the periphery of described upper glass and described bleeding point has sealed strip, there are sealing groove and sealed strip in the periphery of described lower-glass and the corresponding position of described bleeding point, the periphery of described upper glass and described lower-glass welds together in normal pressure lower sealing edge stove by low temperature glass solder, described bleeding point utilizes brazing metal self-closed in vacuum oven, described brazing metal comprises low-temperature metal scolder and solder, form the vacuum layer of a sealing between described upper glass and described lower-glass.
2. vacuum glass according to claim 1, it is characterized in that described vacuum glass can also comprise an intermediate glass, described intermediate glass is clipped between described upper glass and described lower-glass, on described upper glass and described intermediate glass, bleeding point is arranged, described bleeding point utilizes brazing metal self-closed in vacuum oven, and described upper glass and described lower-glass form respectively the vacuum layer of two sealings with described intermediate glass.
3. vacuum glass according to claim 1 and 2, is characterized in that described upper glass, described intermediate glass and described lower-glass are simple glass or coated glass or Low-E glass.
4. according to the described vacuum glass of claims 1 to 3 any one, it is characterized in that described sealed strip adopts the mode of printing, printing or mechanically spraying cryogenic glass powder or glass ink or metal paste to prepare.
5. according to the described vacuum glass of claims 1 to 3 any one, it is characterized in that described sealing groove adopts mechanical workout or laser processing to form.
6. according to the described vacuum glass of claim 1 to 5 any one, it is characterized in that the convex surface of described convex glass toward the outer side, the convex surface bow is high is 3 ~ 10mm.
7. the preparation method of the described vacuum glass of claim 1 to 6 any one, it is characterized in that: described vacuum glass is convex surface vacuum glass or convex surface toughened vacuum glass, and the preparation method is as follows:
The first step, according to the shape of the vacuum glass of required making and two flat glasss up and down of size cutting desired size, bleeding point is made in edge punching at upper glass, offer sealing groove at the peripheral weld of lower-glass and the corresponding position of bleeding point, and upper and lower two blocks of glass are carried out to edging, chamfering, cleaning and drying treatment;
Second step, prepare sealed strip at the periphery of upper glass and the periphery of bleeding point and the periphery of sealing groove, the sealed strip of upper glass can insert in corresponding sealing groove, by the upper lower-glass after processing pack into hot bending die, be placed in bending furnace or annealing furnace, be warming up to 550～750 ℃ of the softening temperature of glass, rely on gravity or the externally applied forces of glass self to make glass form convex surface downwards, and be down to room temperature with stove, or directly carry out the tempering processing;
The 3rd step, will evenly be coated with low temperature glass solder in the sealing groove of lower-glass periphery, upper and lower glass is sent in the edge sealing stove after closing sheet;
The 4th step, carry out the heat temperature raising operation to described edge sealing stove, more than being warming up to the melt temperature of low temperature glass solder, reaches the edge sealing temperature, and the sealed strip of upper glass is under the action of gravity of glass in the embedding sealing groove; Stop heating, lower the temperature with stove, low temperature glass solder hermetic welds together two blocks of glass, and the fire door of opening the edge sealing stove obtains double glazing;
The 5th step, pack brazing metal in the bleeding point of double glazing into, and send in vacuum oven; To described vacuum sole vacuumize, limit heating, be evacuated to 0.1Pa following, be warming up to the temperature of fusion of brazing metal more than, brazing metal is fused into liquid, liquid retention is in the sealing groove of lower-glass, the sealed strip of upper glass also is submerged in liquid, and liquid is by the bleeding point self-sealing; Stop heating, with stove cooling, brazing metal solidifies realizes airtight sealing afterwards to bleeding point, opens vacuum oven, takes out vacuum glass;
The 6th step is put into seal gum in the bleeding point of vacuum glass, Paste Product trade mark or metal finishing sheet on seal gum.
8. the preparation method of vacuum glass according to claim 7, is characterized in that described edge sealing stove can once heat one to the several piece vacuum glass.
9. the preparation method of vacuum glass according to claim 7, is characterized in that described edge sealing stove and accessory has basic heating system and local heating system.
10. the preparation method of vacuum glass according to claim 9, it is characterized in that described basic heating system adopts one or several of Hot-blast Heating, resistive heating, Infrared Heating and far-infrared heating, described local heating system adopts one or several of microwave heating, Electromagnetic Heating, resistive heating, Infrared Heating and far-infrared heating.
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| CN201310298925.4A CN103420594B (en) | 2013-07-17 | 2013-07-17 | Seal strip groove edge sealing, the convex surface vacuum glass and preparation method thereof of sealing |
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| CN104743805A (en) * | 2013-12-25 | 2015-07-01 | 戴长虹 | High-temperature-sheet-combination sealed convex vacuum glass with edges sealed by sealing grooves and sealing strips and manufacturing method thereof |
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| CN104743898A (en) * | 2013-12-25 | 2015-07-01 | 戴长虹 | Metal-welded sealed plain double-vacuum-layer glass with edges sealed by sealing grooves and sealing strips |
| CN104743899A (en) * | 2013-12-25 | 2015-07-01 | 戴长虹 | Metal-welded sealed convex double-vacuum-layer glass with edges sealed by sealing grooves and manufacturing method thereof |
| CN104743804A (en) * | 2013-12-25 | 2015-07-01 | 戴长虹 | High-temperature-sheet-combination sealed convex double-vacuum-layer glass with edges sealed by sealing grooves and sealing strips |
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Effective date of registration: 20191230 Address after: 246725 automobile parts Industrial Park, hengbu Town, Zongyang, Tongling, Anhui Patentee after: Anhui Youkun Glass Co.,Ltd. Address before: No. 6047, floor 6, building a, small and micro entrepreneurship and Innovation Industrial Park, No. 288, Yansan Road, Jiuguan Town, Nanxun District, Huzhou City, Zhejiang Province Patentee before: Li Qiannan |
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Denomination of invention: Convex vacuum glass for sealing edges and sealing grooves and its preparation method Effective date of registration: 20230314 Granted publication date: 20160810 Pledgee: Tongling Rural Commercial Bank Co.,Ltd. Tongdu Sub branch Pledgor: Anhui Youkun Glass Co.,Ltd. Registration number: Y2023980034828 |
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