CN116589169A - Device and method for forming large-size casting colored glaze with few bubbles and uniform texture - Google Patents
Device and method for forming large-size casting colored glaze with few bubbles and uniform texture Download PDFInfo
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- CN116589169A CN116589169A CN202310366804.2A CN202310366804A CN116589169A CN 116589169 A CN116589169 A CN 116589169A CN 202310366804 A CN202310366804 A CN 202310366804A CN 116589169 A CN116589169 A CN 116589169A
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- 238000005266 casting Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 96
- 239000007788 liquid Substances 0.000 claims abstract description 71
- 238000002844 melting Methods 0.000 claims abstract description 36
- 230000008018 melting Effects 0.000 claims abstract description 35
- 239000011449 brick Substances 0.000 claims abstract description 28
- 239000011521 glass Substances 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 238000000137 annealing Methods 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 abstract description 6
- 238000010304 firing Methods 0.000 description 7
- 230000035939 shock Effects 0.000 description 7
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000005357 flat glass Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910000420 cerium oxide Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 239000008395 clarifying agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/02—Other methods of shaping glass by casting molten glass, e.g. injection moulding
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/02—Forehearths, i.e. feeder channels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The application discloses a device and a method for forming large-size casting colored glaze with few bubbles and uniform texture. The forming device comprises a melting device, a material flowing pipe, a material flowing platform and a forming die for receiving the colored glaze liquid flowing out of the material flowing platform; the material flowing pipe is connected with the material melting device and the material flowing platform; the outlet section of the colored glaze liquid on the bottom surface of the material flowing platform is an inclined lip brick with a gradually-reduced width and inclined upwards along the outflow direction of the colored glaze liquid; the side surface of one end of the inclined lip brick, which is positioned at the colored glaze liquid outlet, is arc-shaped. The molding method adopts the molding device and comprises the following steps: placing the blank into a melting device, heating to 400-900 ℃ and preserving heat for 0.5-1 h, and continuously heating the blank to 700-1250 ℃ for melting to obtain flowing colored glaze liquid; the glass liquid overflows to a material flowing platform through a material flowing pipe, flows out along the inclined lip brick and enters a forming die to be formed; and cooling the formed colored glaze to 450-630 ℃ for annealing, cooling to below 45 ℃ at a speed of less than 20 ℃/h, and demolding to obtain the large-size casting colored glaze.
Description
Technical Field
The application relates to the technical field of colored glaze production, in particular to a device and a method for forming large-size casting colored glaze with few bubbles and uniform texture.
Background
Colored glaze has the characteristics of colorful and changeable magnificent colors, is an important decoration member in traditional Chinese buildings since ancient times, and is generally used for important buildings such as palace, temple, cemetery and the like.
In recent years, the use of large plate and thick plate glass for building decoration is a welcome of designers. This puts higher demands on the appearance and quality of the glazed plate.
The slab glass is typically made by a firing process. Piling and firing means a forming mode that colored glaze blanks are piled in a forming die according to a certain arrangement in a furnace, the furnace temperature is raised, and the colored glaze blanks are melted and formed. The stacking firing process has the advantages that the flow of the fused glass blanks is small, the fused glass blanks are insufficiently mixed with surrounding glass blanks, the texture of the molded glass is uneven, and obvious glass joints exist under the observation of a stress meter; meanwhile, when the piled and burned glass blanks are melted, a small amount of air exists between the piled and burned glass blanks, and the air cannot be removed and remains in the glass plates, so that obvious bubble groups or large bubbles are formed.
The uneven texture and the existence of bubbles make the thermal shock resistance of the stacked and burned large plate glass poor, and the stacked and burned large plate glass is generally broken at the temperature of 30 ℃ and is easy to break when being used outdoors in extreme weather.
The patent specifications with publication numbers of CN 103466946A and CN 103466947A disclose a preparation process of colored glaze with good clarifying effect and excellent quality, which is improved from the perspective of raw materials, cerium oxide and antimony trioxide are used together as clarifying agents, the clarifying effect is obviously better than that of pure cerium oxide or antimony trioxide, and the proportion of cerium oxide or antimony trioxide is controlled within the range of 1 (2-4), so that the prepared colored glaze has good luster and fewer bubbles.
The patent specification with publication number CN 114920447A discloses a preparation method, a forming device and a product of borosilicate glass with few bubbles, glass liquid in a melting device is guided into the forming device through the design of a specific material guiding pipe, secondary bubbles are greatly reduced in the glass liquid guiding process through the design of overflow at the tail part of the material guiding pipe, the thickness of a flow layer at the tail overflow section of the material guiding pipe is regulated and controlled through temperature control of the tail outlet section of the material guiding pipe, the thickness of the glass liquid flow layer can be thinned through higher outlet temperature, and bubbles are discharged more thoroughly. According to the technology, the temperature is adjusted in real time according to the flowing state of the glass liquid, finer temperature area distribution and control are needed, the number of bubbles can be controlled to be very low when the technology is used for manufacturing single products, but the requirements on actual operation and control are high, and the implementation difficulty is high when the technology is used for mass production.
Disclosure of Invention
The application provides a large-size casting colored glaze forming device with few bubbles and uniform texture, solves the problems of uneven stacking and firing textures and multiple bubbles of colored glaze thick plates, can be formed under the condition of only one temperature zone or temperature, does not increase the original operation control difficulty, and is suitable for large-scale batch production.
The specific technical scheme is as follows:
a large-size casting colored glaze forming device with few bubbles and uniform texture comprises a melting device, a material flowing pipe, a material flowing platform and a forming die for receiving colored glaze liquid flowing out of the material flowing platform;
the material flowing pipe is connected with the material melting device and the material flowing platform;
the outlet section of the colored glaze liquid on the bottom surface of the material flowing platform is an inclined lip brick with a gradually-reduced width and inclined upwards along the outflow direction of the colored glaze liquid; the inclined lip brick is arranged at one end side surface of the colored glaze liquid outlet and is arc-shaped, and the arc-shaped design surface is smooth, so that the glass liquid can be prevented from being entrained with air in the casting process, and bubbles are reduced.
The width of the outlet section of the colored glaze liquid on the bottom surface of the material flowing platform is gradually reduced, so that the colored glaze liquid can be gathered towards the middle, and the secondary mixing uniformity of the colored glaze liquid is promoted.
The outlet section of the colored glaze liquid on the bottom surface of the material flowing platform is inclined upwards, so that bubbles can be discharged in the flowing process of the colored glaze liquid.
According to the application, by adding the material flowing platform with a specific structure, the colored glaze liquid is thinned at the outlet of the material flowing platform, so that primary foam discharging is added, and meanwhile, the colored glaze liquid is secondarily mixed in the flowing process on the material flowing platform, so that the quality of the final colored glaze product is more uniform.
The forming device designed by the application can effectively remove the problems of bubbles and uneven mixing caused by the glass stacking and firing process, has low bubble rate and good uniformity, has strength superior to that of large-plate glass produced by the stacking and firing process, has a thermal shock resistance temperature difference of more than 50 ℃, can resist severe temperature change, and can be used outdoors.
The melting device is a device which can melt the colored glaze blank into colored glaze liquid and can transfer the colored glaze liquid to the material flowing platform through the material flowing pipe.
The sectional area of the flow pipe can be calculated according to the product quality, the viscosity of glass, the forming temperature, the forming time and the like by a computational fluid dynamics method.
In a preferred embodiment, the small-bubble and uniform-texture large-size casting colored glaze forming device is characterized in that one end of the material flowing pipe is connected with the bottom surface of the material flowing device, and the other end of the material flowing pipe penetrates through the bottom surface of the material flowing platform from bottom to top, so that colored glaze liquid from the material flowing device overflows from the other end of the material flowing pipe and flows into the material flowing platform, and bubbles can be effectively released in the overflow process.
In a preferred embodiment, the small-bubble and uniform-texture large-size casting colored glaze forming device is characterized in that the flow material pipe is U-shaped, the bottom of the flow material pipe is free of a horizontal section and a right-angle section, and the flow pressure of colored glaze liquid is reduced.
In a preferred embodiment, the small-bubble and uniform-texture large-size casting colored glaze forming device has the advantage that the orifice at the other end of the material flowing pipe is 50-100 mm higher than the inner bottom surface of the material flowing platform.
In a preferred embodiment, the bottom surface of the melting device is 100-200 mm higher than the inner bottom surface of the material discharging platform of the large-size casting colored glaze forming device with few bubbles and uniform texture.
In a preferred example, the small-bubble and uniform-texture large-size casting colored glaze forming device has the advantages that the height difference between the lowest point and the highest point of the inclined top surface of the inclined lip brick is 30-80 mm, the upward inclination angle of the inclined top surface of the inclined lip brick is 3-9 degrees, and the large-size casting colored glaze with fewer bubbles and more uniform texture can be obtained.
In a preferred example, the width of the colored glaze liquid outlet of the inclined lip brick of the large-size casting colored glaze forming device with few bubbles and uniform texture is 1/3-2/3 of the width or diameter of the colored glaze product to be manufactured. The width of the colored glaze liquid outlet of the inclined lip brick is too wide, so that the thickness of the colored glaze liquid is too thin, some places can not be soaked, and the distribution of the flowing materials is uneven; the too narrow width of the colored glaze liquid outlet of the inclined lip brick can cause too thick colored glaze liquid, and air bubbles are difficult to discharge.
The small-bubble and uniform-texture large-size casting colored glaze forming device is characterized in that a colored glaze liquid outlet of the inclined lip brick can be positioned at one end or the middle position of a forming die.
In a preferred example, the small-bubble and uniform-texture large-size casting colored glaze forming device has a tapered trapezoid top view structure, wherein the ratio of the widest part of the trapezoid to the narrowest part serving as a colored glaze liquid outlet is 4/3-3/2, and the uniformity of secondary mixing of colored glaze liquid can be improved by the design of the change of the width ratio.
The application can control the flow rate and thickness of the flowing material through the diameter of the flowing material pipe and the width of the colored glaze liquid outlet of the flowing material platform.
In a preferred embodiment, the small-bubble and uniform-texture large-size casting colored glaze forming device, the melting device, the material flowing pipe, the material flowing platform and the forming die are arranged in the same heating furnace. The heating furnace can be a single temperature zone or a multi-temperature zone.
In a preferred example, the small-bubble and uniform-texture large-size casting colored glaze forming device keeps the temperature of the material flowing platform not lower than the temperature of the material flowing pipe, and the temperature of the material flowing pipe is not lower than the temperature of the material melting device, so that the viscosity of the colored glaze liquid in the flowing process is not increased by the design, and the good fluidity of the colored glaze liquid is ensured.
The forming die used in the application can be provided with concave-convex grains or can be provided with no concave-convex grains.
The application also provides a method for forming the large-size casting colored glaze with few bubbles and uniform texture, which adopts the device for forming the large-size casting colored glaze with few bubbles and uniform texture;
the method for forming the large-size casting colored glaze with few bubbles and uniform texture specifically comprises the following steps:
s1, placing the blank into a melting device, heating to 400-900 ℃ and preserving heat for 0.5-1 h, and then continuously heating the blank to 700-1250 ℃ for melting to obtain flowing colored glaze liquid;
s2, the colored glaze liquid overflows to a material flowing platform through a material flowing pipe, flows out along the inclined lip brick and enters a forming die to be formed;
s3, cooling the formed colored glaze to 450-630 ℃ for annealing, slowly cooling to below 45 ℃ at a speed of less than 20 ℃/h, and demoulding to obtain the large-size casting colored glaze.
The method and the device are particularly suitable for manufacturing the large-size casting colored glaze. In a preferred example, the thickness of the large-size casting colored glaze is not less than 25mm, and the plane area is not less than 0.5m 2 . The large-size casting colored glaze can be a colored glaze plate. The large-size casting colored glaze can be equal in thickness or unequal in thickness.
Compared with the thick plate colored glaze produced by a stacking firing method, the method and the device provided by the application have the advantages that the bubbles of the product are reduced by more than 50%, the stress distribution of the product is uniform, and no splicing trace exists in the product. Compared with the stacked and burned thick plate colored glaze, the forming method and the forming device can lead the texture of the thick plate colored glaze to be uniform, and the thermal shock resistance of the thick plate colored glaze is improved by more than 15 ℃.
The colored glaze casting is a casting process for melting colored glaze raw materials or blanks at a certain temperature and injecting the raw materials or blanks into a mold for molding; when the colored glaze blanks are melted, gas among the blanks is clamped in the melted colored glaze liquid and is brought into a die, and a large amount of bubbles can remain in the molded product, so that the attractive appearance and the mechanical strength of colored glaze products are affected; meanwhile, the moving distance is short after the glass liquid is melted in the casting process, the moving direction is single, and the like can cause uneven texture of the whole glass product, and the strength of the glass product can be influenced. The conventional solution to the bubble problem is to raise the temperature one and to increase the bubble removal time at high temperature. Increasing the temperature and prolonging the bubble removal time both increase the energy consumption, but neither effectively solve the problem of non-uniformity. The application can utilize the device design to enable the colored glaze liquid to flow along the designed route on the basis of unchanged original molding temperature and molding time, effectively eliminate bubbles, and simultaneously, the colored glaze liquid is uniformly mixed in the flowing process, so that the strength of the product is increased.
Compared with the prior art, the application has the beneficial effects that: the application can obtain the colored glaze product with fewer bubbles and more uniform texture under the condition of not increasing energy and time consumption.
Drawings
FIG. 1 is a schematic structural view of a large-size casting colored glaze forming device with few bubbles and uniform texture in example 1;
FIG. 2 is a schematic diagram of the front view structure of the flow platform in embodiment 1;
FIG. 3 is a schematic top view of the flow table of example 1;
in the figure:
1-melting device 2-material flowing pipe 3-material flowing platform
4-forming mould 5-heating furnace 6-oblique lip brick.
Detailed Description
The application will be further elucidated with reference to the drawings and to specific embodiments. It is to be understood that these examples are illustrative of the present application and are not intended to limit the scope of the present application.
The methods of operation, under which specific conditions are not noted in the examples below, are generally in accordance with conventional conditions, or in accordance with the conditions recommended by the manufacturer.
Example 1
As shown in fig. 1, the large-size casting colored glaze forming device with few bubbles and uniform texture comprises a melting device 1, a material flowing pipe 2, a material flowing platform 3 and a forming die 4 for receiving colored glaze liquid flowing out of the material flowing platform 3. The melting device 1, the material flowing pipe 2, the material flowing platform 3 and the forming die 4 are arranged in the same heating furnace 5, the temperature of the material flowing platform 3 is kept not lower than the temperature of the material flowing pipe 2, and the temperature of the material flowing pipe 2 is not lower than the temperature of the melting device 1.
The flow material pipe 2 is U-shaped, and the bottom of the flow material pipe is free of a horizontal section and a right-angle section. The diameter of the flow pipe 2 is 40mm. One end of the flow pipe 2 is connected with the bottom surface of the melting device 1, the other end of the flow pipe passes through the bottom surface of the flow platform 3 from bottom to top, and the pipe orifice at the other end of the flow pipe 2 is 80mm higher than the lowest point (also can be considered as a point A in fig. 2 and 3) of the inner bottom surface of the flow platform 3, so that the colored glaze liquid from the melting device 1 overflows from the other end of the flow pipe 2 and flows into the flow platform 3.
The bottom surface of the melting device 1 is 160mm higher than the lowest point (also referred to as point a in fig. 2 and 3) of the inner bottom surface of the flow platform 3.
As shown in fig. 2 and 3, the side surface of the material flowing platform 3 is provided with three retaining walls, one outlet is provided with a tapered trapezoid in top view, the width of the widest part of the trapezoid is 750mm, and the width of the narrowest part serving as a glass liquid flow outlet is 550mm.
The area of the bottom surface of the material flowing platform 3 corresponding to the other end of the material flowing pipe 2 is a plane, and the section close to the colored glaze liquid outlet is an inclined lip brick 6 with a gradually reduced width and upwards inclined along the flowing direction of the colored glaze liquid. The lowest point of the inclined top surface of the inclined lip brick 6 is point A, the highest point is point B, and the height difference between the point A and the point B is 60mm. The side surface of one end (namely one end of the point B) of the inclined lip brick 6 positioned at the colored glaze liquid outlet is arc-shaped. The inclined lip brick 6 has an inclined top surface inclined upward by an angle of 4 deg.. The width of the glass liquid outlet of the inclined lip brick 6 is 550mm. The glass liquid outlet of the inclined lip brick 6 is positioned at one end of the forming die 4.
The large-size casting colored glaze forming device with few bubbles and uniform texture is adopted to carry out the process of few bubbles and uniform textureThe forming method of the large-size casting colored glaze comprises the following steps of 2 71％，B 2 O 3 14.3％，Al 2 O 3 3.1％，BaO 2.1％，CaO 0.9％，Na 2 O 5％，K 2 O 3％，TiO 2 0.4％，ZnO 0.2％。
The forming temperature is 1100 ℃ according to the blank temperature-viscosity curve, the large-size casting colored glaze to be manufactured is thick plate colored glaze, the size length multiplied by the width is 2500mm multiplied by 1000mm, the thickness variation is 30-140 mm, and the total weight is 500kg.
The method for forming the large-size casting colored glaze with few bubbles and uniform texture comprises the following specific steps:
1) Placing the blank into a melting device 1, heating to 890 ℃ and preserving heat for 1h;
2) After heat preservation, continuously heating the blank to 1100 ℃ for melting to obtain flowing glass liquid;
3) The molten and flowing colored glaze liquid overflows to a material flowing platform 3 through a material flowing pipe 2;
4) The colored glaze liquid enters a material flowing platform 3, and the colored glaze liquid uniformly flows into a die for forming 4 with a certain thickness through the slope control of the material flowing platform 3;
5) And cooling the formed colored glaze to 560 ℃ for annealing, slowly cooling to below 45 ℃ at a speed of less than 20 ℃/h, and discharging to obtain the thick plate colored glaze.
In the embodiment, the bubble diameter of the thick plate colored glaze product is 0.1-1 mm, the number of bubbles is 15 per square meter, the stress distribution is uniform, no splicing trace exists in the thick plate colored glaze product, and the thermal shock resistance is 52 ℃.
Comparative example 1
The difference from example 1 is that: stacking the blanks in a mould by adopting a traditional stacking and sintering process, preserving the heat for 1h at 890 ℃, carrying out melt molding at 1100 ℃, cooling the molded colored glaze to 560 ℃ for annealing, slowly cooling to below 45 ℃ at a speed of less than 20 ℃/h, and discharging to obtain the thick-plate colored glaze.
The diameter of the bubble of the colored glaze of the thick plate of the comparative example is 0.1-1 mm, the number of bubbles is 52 per square meter, the internal splice is obvious when the polarizer is observed, and the thermal shock resistance is 35 ℃.
Example 2
A large-size casting colored glaze forming device with few bubbles and uniform texture similar to that of example 1 is adopted, the difference is that the diameter of a flow pipe 2 is 36mm, the orifice of the other end of the flow pipe 2 is 70mm higher than the lowest point of the inner bottom surface of a flow platform 3, the width of the widest part of the trapezoid of the flow platform 3 is 700mm, the width of the narrowest part serving as a colored glaze liquid outlet (namely, the width of the colored glaze liquid outlet of an inclined lip brick 6) is 480mm, and the upward inclination angle of the inclined top surface of the inclined lip brick 6 is 3 degrees.
The method for forming the small-bubble and uniform-texture large-size casting colored glaze is carried out by adopting the small-bubble and uniform-texture large-size casting colored glaze forming device, and the blank comprises the following components in percentage by mass 2 72％，B 2 O 3 2％，Al 2 O 3 3.1％，CaO 3％，Na 2 O 11％，K 2 O 5％，TiO 2 0.5％，ZnO 0.4％，MgO 3％。
The forming temperature is 1060 ℃ according to the blank temperature-viscosity curve, the large-size casting colored glaze to be manufactured is thick plate colored glaze, the size length multiplied by the width is 2500mm multiplied by 1000mm, the thickness is 90mm, and the total weight is 460kg.
The method for forming the large-size casting colored glaze with few bubbles and uniform texture comprises the following specific steps:
1) Placing the blank into a melting device 1, heating to 830 ℃, and preserving heat for 1h;
2) After heat preservation, continuously heating the blank to 1060 ℃ for melting to obtain flowing glass liquid;
3) The molten and flowing colored glaze liquid overflows to a material flowing platform 3 through a material flowing pipe 2;
4) The colored glaze liquid enters a material flowing platform 3, and the colored glaze liquid uniformly flows into a die for forming 4 with a certain thickness through the slope control of the material flowing platform 3;
5) And cooling the formed colored glaze to 527 ℃ for annealing, slowly cooling to below 45 ℃ at a speed of less than 20 ℃/h, and discharging to obtain the thick plate colored glaze.
In the embodiment, the bubble diameter of the thick plate colored glaze product is 0.1-1 mm, the number of bubbles is 12 per square meter, the stress distribution is uniform, no splicing trace exists in the thick plate colored glaze product, and the thermal shock resistance is 54 ℃.
Comparative example 2
The difference from example 2 is that: stacking the blanks in a mould by adopting a traditional stacking and sintering process, preserving heat for 1h at 830 ℃, carrying out fusion forming at 1060 ℃, cooling the formed colored glaze to 527 ℃ for annealing, slowly cooling to below 45 ℃ at a speed of less than 20 ℃/h, and discharging to obtain the thick plate colored glaze.
The diameter of the bubble of the thick plate colored glaze of the comparative example is 0.1-1 mm, the number of bubbles is 46 per square meter, the internal splice is obvious when the polarizer is observed, and the thermal shock resistance is 36 ℃.
Further, it is to be understood that various changes and modifications of the present application may be made by those skilled in the art after reading the above description of the application, and that such equivalents are intended to fall within the scope of the application as defined in the appended claims.
Claims (9)
1. The large-size casting colored glaze forming device with few bubbles and uniform texture is characterized by comprising a melting device (1), a material flowing pipe (2), a material flowing platform (3) and a forming die (4) for receiving colored glaze liquid flowing out of the material flowing platform (3);
the material flowing pipe (2) is connected with the material melting device (1) and the material flowing platform (3);
the outlet section of the bottom surface glass liquid of the material flowing platform (3) is an inclined lip brick (6) with a gradually-reduced width and inclined upwards along the outflow direction of the glass liquid; the side surface of one end of the inclined lip brick (6) positioned at the colored glaze liquid outlet is arc-shaped.
2. The large-size casting colored glaze forming device with few bubbles and uniform texture according to claim 1 is characterized in that one end of a flow pipe (2) is connected with the bottom surface of a material melting device (1), and the other end of the flow pipe passes through the bottom surface of a material melting platform (3) from bottom to top, so that colored glaze liquid from the material melting device (1) overflows from the other end of the flow pipe (2) to enter the material melting platform (3).
3. The large-size casting colored glaze forming device with few bubbles and uniform texture according to claim 2 is characterized in that the flow pipe (2) is U-shaped, and the bottom of the flow pipe is free of a horizontal section and a right-angle section;
the pipe orifice at the other end of the material flowing pipe (2) is 50-100 mm higher than the inner bottom surface of the material flowing platform (3);
the bottom surface of the melting device (1) is 100-200 mm higher than the inner bottom surface of the material discharging platform (3).
4. The large-size casting colored glaze forming device with few bubbles and uniform texture according to claim 1 is characterized in that the height difference between the lowest point and the highest point of the inclined top surface of the inclined lip brick (6) is 30-80 mm; the inclined lip brick (6) has an upward inclination angle of 3-9 degrees.
5. The small-bubble and uniform-texture large-size casting colored glaze forming device according to claim 1, wherein the width of a colored glaze liquid outlet of the inclined lip brick (6) is 1/3-2/3 of the width or diameter of a colored glaze product to be manufactured;
the colored glaze liquid outlet of the inclined lip brick (6) is positioned at one end or the middle position of the forming die (4).
6. The small-bubble and uniform-texture large-size casting colored glaze forming device according to claim 1, wherein the side surface of the material flowing platform (3) is provided with three retaining walls, one outlet is provided with a tapered trapezoid in top view, and the ratio of the widest part of the trapezoid to the narrowest part serving as a colored glaze liquid outlet is 4/3-3/2.
7. The large-size casting colored glaze forming device with few bubbles and uniform texture according to claim 1 is characterized in that a melting device (1), a material flowing pipe (2), a material flowing platform (3) and a forming die (4) are arranged in the same heating furnace (5);
the temperature of the material flowing platform (3) is kept not lower than the temperature of the material flowing pipe (2), and the temperature of the material flowing pipe (2) is not lower than the temperature of the melting device (1).
8. A method for forming a large-size casting colored glaze with few bubbles and uniform texture, which is characterized in that the device for forming the large-size casting colored glaze with few bubbles and uniform texture is adopted;
the method for forming the large-size casting colored glaze with few bubbles and uniform texture specifically comprises the following steps:
s1, placing the blank into a melting device (1), heating to 400-900 ℃ and preserving heat for 0.5-1 h, and then continuously heating the blank to 700-1250 ℃ for melting to obtain flowing glass liquid;
s2, the colored glaze liquid overflows to a material flowing platform (3) through a material flowing pipe (2) and flows out along an inclined lip brick (6) to enter a forming die (4) for forming;
s3, cooling the formed colored glaze to 450-630 ℃ for annealing, slowly cooling to below 45 ℃ at a speed of less than 20 ℃/h, and demoulding to obtain the large-size casting colored glaze.
9. The method for forming the large-size casting colored glaze with few bubbles and uniform texture according to claim 8, wherein the thickness of the large-size casting colored glaze is not less than 25mm, and the plane area is not less than 0.5m 2 。
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR800000199B1 (en) * | 1976-01-27 | 1980-03-12 | 데이비드 프로스트 필킹턴·래즈리 뉴톤 월 | Manufacturing device for glass |
| EP1415740A1 (en) * | 2002-10-31 | 2004-05-06 | Fujio Yamada | Device for melting and casting materials |
| JP2012001391A (en) * | 2010-06-16 | 2012-01-05 | Hoya Corp | Apparatus for manufacturing glass plate and method for manufacturing each of glass plate, glass material for press molding, optical element and thin sheet glass |
| CN114920447A (en) * | 2022-05-17 | 2022-08-19 | 杭州纳玻科技有限公司 | Preparation method, forming device and product of borosilicate colored glaze with few bubbles |
| CN115259637A (en) * | 2022-08-12 | 2022-11-01 | 浙江大学 | Rapid forming device and method for ultra-large single glass device |
-
2023
- 2023-04-06 CN CN202310366804.2A patent/CN116589169A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR800000199B1 (en) * | 1976-01-27 | 1980-03-12 | 데이비드 프로스트 필킹턴·래즈리 뉴톤 월 | Manufacturing device for glass |
| EP1415740A1 (en) * | 2002-10-31 | 2004-05-06 | Fujio Yamada | Device for melting and casting materials |
| JP2012001391A (en) * | 2010-06-16 | 2012-01-05 | Hoya Corp | Apparatus for manufacturing glass plate and method for manufacturing each of glass plate, glass material for press molding, optical element and thin sheet glass |
| CN114920447A (en) * | 2022-05-17 | 2022-08-19 | 杭州纳玻科技有限公司 | Preparation method, forming device and product of borosilicate colored glaze with few bubbles |
| CN115259637A (en) * | 2022-08-12 | 2022-11-01 | 浙江大学 | Rapid forming device and method for ultra-large single glass device |
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