CN114853351A - Processing method of plate glass heat insulation coating film - Google Patents
Processing method of plate glass heat insulation coating film Download PDFInfo
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- CN114853351A CN114853351A CN202210515749.4A CN202210515749A CN114853351A CN 114853351 A CN114853351 A CN 114853351A CN 202210515749 A CN202210515749 A CN 202210515749A CN 114853351 A CN114853351 A CN 114853351A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
- C03C17/008—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28
- C03C17/009—Mixtures of organic and inorganic materials, e.g. ormosils and ormocers
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/001—General methods for coating; Devices therefor
- C03C17/002—General methods for coating; Devices therefor for flat glass, e.g. float glass
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/40—Coatings comprising at least one inhomogeneous layer
- C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
- C03C2217/44—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the composition of the continuous phase
- C03C2217/445—Organic continuous phases
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/40—Coatings comprising at least one inhomogeneous layer
- C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
- C03C2217/46—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase
- C03C2217/47—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase consisting of a specific material
- C03C2217/475—Inorganic materials
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/10—Deposition methods
- C03C2218/11—Deposition methods from solutions or suspensions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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Abstract
The invention provides a processing method of a plate glass heat insulation coating, which comprises the following steps: a liquid bag (1) is arranged in the liquid tank (2) of the machine head, and the external dimension of the liquid bag is matched with the dimension of the inner cavity of the liquid tank of the machine head; adding a coating into the handpiece liquid tank (2), adding a liquid into the liquid bag (1), wherein the density of the liquid is equal to or less than that of the coating, so that the liquid bag (1) floats above the coating in the handpiece liquid tank (2); when in shower coating, the coated object is driven to pass through the lower part of the machine head liquid tank, and the coating is sprayed through the machine head liquid tank (2) under the dual functions of the self weight and the pressure of the liquid bag to form a coating film on the surface of the coated object. The liquid bag and the control equipment are added into the machine head liquid tank, so that the liquid level height of the coating in the machine head liquid tank is reduced, the coating can be normally sprayed under a lower liquid level, the use amount of the coating is effectively saved, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of plate glass, in particular to a processing method of a plate glass heat insulation coating.
Background
The transparent glass heat-insulating coating is a functional building coating used on glass, and is directly sprayed on the surface of the glass to form a layer of film, and has the functions of transparency, heat insulation and ultraviolet ray insulation. The glass heat-insulating coating has high light transmittance, and does not influence the optical performance of glass; the solar energy is effectively blocked due to high heat insulation property; high ultraviolet isolation rate and can protect indoor articles.
The glass heat-insulating coating mainly comprises nanometer materials (such as tin antimony oxide ATO solution, indium tin oxide ITO solution, zinc aluminum oxide AZO solution, gallium zinc oxide GZO solution and nanometer tungsten oxide WO3 solution), various resins (such as acrylic resin, polyurethane resin, organic silicon resin, silicone-acrylic resin and the like) and other coating additives (such as wetting agent, curing agent, leveling agent, defoaming agent, stabilizing agent, coupling agent and the like).
The kind and amount of the nano material are directly related to the performance and cost of the coating, for example, ITO has good heat-insulating performance, but the price of the product is higher.
At present, the film coating process of the plate glass mainly comprises several methods such as a spraying method, a curtain coating method, a roller coating method, a blade coating method and the like, and various methods have different requirements on the characteristics of the coating. Through a large number of experiments and data acquisition and analysis, it is considered that a curtain coating mode, a roller coating mode and a blade coating mode are adopted firstly to obtain a high-quality film layer on the flat glass.
In the curtain coating process, the coating is injected into a liquid tank of the machine head to reach a certain liquid level height, and is sprayed down through a nozzle or a narrow slit by means of dead weight to form a curtain-shaped curtain on a coated object driven by a conveying device, so that a uniform coating film is formed. During the stable coating process, the coating in the liquid storage tank must be kept at a certain liquid level. And after the primary curtain coating is finished, if the interval time of the secondary production is longer, the coating in the liquid tank of the machine head cannot be reused. Therefore, a certain amount of coating material is inevitably wasted after each shower coating. The coating wastes more in small-batch production, the glass heat-insulating coating is expensive, and the production cost is higher.
In summary, the following problems exist in the prior art: how to realize normal curtain coating under a lower liquid level, saves the coating using amount, avoids waste and reduces cost.
Disclosure of Invention
The invention solves the technical problem of how to realize normal curtain coating under a lower liquid level, save the coating consumption and avoid waste.
In order to achieve the purpose, the invention provides a processing method of a plate glass heat insulation coating, which comprises the following steps:
arranging a liquid bag in a machine head liquid tank;
adding a coating into a handpiece liquid tank, and adding a liquid into the liquid bag, wherein the density of the liquid is equal to or less than that of the coating, so that the liquid bag floats above the coating in the handpiece liquid tank;
when in shower coating, the coated object is driven to pass through the lower part of the handpiece liquid tank, the coated object is flat glass, and the coating is sprayed through the handpiece liquid tank under the dual functions of self weight and the pressure of the liquid bag to form a coating film on the surface of the coated object.
Specifically, the volume of the coating in the liquid tank of the handpiece is controlled by a first peristaltic pump, and the volume of the liquid in the liquid bag is controlled by a second peristaltic pump.
Specifically, the first peristaltic pump is connected with a paint container, and the second peristaltic pump is connected with a liquid container.
Specifically, after a coating film is formed on the surface of the object to be coated, the excess coating material is returned to the coating material container.
Specifically, during spraying, the pressure at the bottom of the liquid tank of the machine head is displayed.
Specifically, the material of the liquid bag is polyethylene PE or polyvinyl chloride PVC.
Specifically, the first peristaltic pump and the second peristaltic pump are made to have different flow rates.
Specifically, the first peristaltic pump has a greater flow rate than the second peristaltic pump.
Specifically, the liquid is a water-based paint. For example: natural water-based paint of natural substances or minerals (such as potassium silicate) or petrochemical water-based paint of synthetic resins (such as acrylic resins).
Specifically, the pressure of the coating in a liquid tank of the machine head is kept within a set range through a first peristaltic pump; the pressure of the liquid in the sac is maintained within a predetermined range by the second peristaltic pump.
Further, the processing method of the flat glass heat insulation coating film further comprises the following steps:
after the coating is formed into a film layer (after leveling and defoaming), the film layer is dried in a room temperature dust-free environment, and then the film layer is placed into an oven at 80-120 ℃ for curing for 3-4 h to form a hard film layer with the thickness of 7-12 mu m.
The invention has the beneficial effects that: the coating is sprayed through a nozzle or a narrow slit by the dead weight and is sprayed on the object to be coated driven by the conveying device in a curtain shape to form a uniform coating film, and the redundant coating flows back to the container and is pumped to a machine head liquid tank for recycling. The liquid bag and the control equipment are added into the machine head liquid tank, so that the liquid level height of the coating in the machine head liquid tank is reduced, the coating can be normally sprayed under a lower liquid level, the use amount of the coating, particularly the use amount of nano materials in the coating, is effectively saved, and the production cost is reduced. The invention ensures that when the spray coating operation is stopped for more than or equal to 24 hours, the loss of the ATO powder raw material is reduced from 1.5 ten thousand yuan to 0.6 ten thousand yuan.
Drawings
FIG. 1 is a schematic flow chart of a method for processing a heat-insulating coating film for flat glass according to an embodiment of the present invention;
FIG. 2 is a schematic structural view in a top view of a processing apparatus using a sheet glass thermal barrier coating film according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a processing apparatus using a flat glass thermal barrier coating according to an embodiment of the present invention in a side view;
FIG. 4 is a schematic perspective view of a first angle of a processing apparatus using a sheet glass thermal barrier coating according to an embodiment of the present invention;
FIG. 5 is a perspective view of a second angle of a processing apparatus using a sheet glass thermal barrier coating according to an embodiment of the present invention.
The reference numbers illustrate:
1. a liquid sac; 2. a machine head liquid tank; 3. a work table; 4. a first peristaltic pump; 5. a paint container; 6. a liquid container; 7. a second peristaltic pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiment of the invention, as shown in fig. 1, a processing method of a flat glass heat insulation coating film is provided, and the processing method adopts a curtain coating process to coat the film, and comprises the following steps:
a liquid bag 1 is arranged in a machine head liquid tank 2; the external dimension of the liquid bag 1 is matched with the inner cavity dimension of the liquid tank 2 of the machine head; adding a coating into a handpiece liquid tank 2, and adding a liquid into a liquid bag 1, wherein the density of the liquid is equal to or less than that of the coating; the liquid sac 1 floats above the coating in the liquid groove 2 of the machine head. The liquid added into the liquid sac 1 is water-based paint, and the paint using water as a solvent or as a dispersion medium can be called water-based paint. Aqueous coatings are divided into two broad categories depending on the binder class in the coating: natural water-based paints of natural substances or minerals (such as potassium silicate) and petrochemical water-based paints of synthetic resins (such as acrylic resins).
The liquid is water or industrial alcohol, depending on the type of coating, the ethanol content of which is typically 95% and 99%. The curtain coating process is to wet, adhere and cover the surface of a coated object by adopting excessive coating, level by virtue of the self gravity of the coating, and then remove excess materials to form a film. The coating viscosity is therefore an important parameter for the flow coating process. In order to further enhance the matching effect of the liquid in the liquid bag 1 and the coating in the handpiece liquid tank 2, the coating in the handpiece liquid tank 2 is generally 15-120 s in viscosity (for example, the coating on the market is selected according to the brand: Ande, the model LND1, the name: paint-4 cup, the outflow time is 20-150 s), the liquid bag 1 is manufactured according to the size of the inner cavity of the handpiece liquid tank 2, the material is selected from plastic (polyethylene PE or polyvinyl chloride PVC), and the liquid bag filled with the liquid floats above the coating and can freely float up and down along with the rise and fall of the liquid level. The liquid in the sac is determined according to the type of the paint, and the density of the liquid is slightly lower than that of the paint.
The liquid tank 2 of the machine head and the liquid bag 1 are respectively provided with peristaltic pumps with different flow rates. As shown in fig. 2, the flow rates of the first peristaltic pump 4 and the second peristaltic pump 7 are made different; the first peristaltic pump 4 has a greater flow rate than the second peristaltic pump 7. The volume of the coating in the handpiece liquid tank 2 is controlled by the first peristaltic pump 4, and the volume of the liquid in the liquid bag 1 is controlled by the second peristaltic pump 7;
the peristaltic pump can realize high-precision continuous transmission and quantitative transmission of the liquid to be conveyed. As shown in fig. 5, the paint and the liquid are stored in the paint container 5 and the liquid container 6, respectively.
In the shower coating, as shown in fig. 4, the object to be coated is carried by the conveyor on the table 3 to pass under the head bath 2, and a coating film is formed on the surface of the object to be coated. The narrow gap is set to be 0.5-1 mm, the coating is sprayed through the nozzle or the narrow gap, the pressure of the sprayed coating is 0.15-0.35 MPa, and the coating is sprayed on the coated object driven by the conveying device in a curtain shape to form a uniform coating.
As shown in fig. 3, a first peristaltic pump 4 is connected to a paint container 5 and a second peristaltic pump 7 is connected to a liquid container 6. The peristaltic pump can realize high-precision continuous transmission and quantitative transmission of the liquid to be conveyed.
After the coating film is formed on the surface of the object to be coated, the excess coating material flows back into the coating material container 5. The liquid is pumped to the machine head for recycling.
A pressure sensor is arranged at the bottom of the machine head liquid tank 2. And the pressure is displayed in real time, and the pressure at the bottom of the liquid tank of the machine head is displayed during spraying. The amount of paint and liquid is precisely controlled by the peristaltic pumps (first peristaltic pump 4 and second peristaltic pump 7) to maintain the pressure within a set range.
The material of the liquid bag 1 adopts polyethylene PE or polyvinyl chloride PVC.
A first peristaltic pump 4, a paint container 5, a second peristaltic pump 7 and a liquid container 6 are all arranged on one side of the table 3.
The second peristaltic pump 7 and the liquid container 6 are both arranged on the front side of the handpiece liquid tank 2.
The first peristaltic pump 4 and the paint container 5 are both arranged on the rear side of the handpiece liquid tank 2. The layout is compact, and the space is utilized.
The external dimension of the liquid bag 1 is matched with the inner cavity dimension of the liquid groove 2 of the machine head. The liquid bag floats above the coating and can freely float up and down along with the rise and fall of the liquid level.
The pressure of the coating in the handpiece liquid tank 2 is kept within a set range by a first peristaltic pump 4; the pressure of the liquid in the sac 1 is maintained within a predetermined range by the second peristaltic pump 7.
The coating is sprayed through a nozzle or a narrow slit by the dead weight and is sprayed on the coated object driven by the conveying device in a curtain shape to form a uniform coating film, and the redundant coating flows back to the container and is pumped to the liquid tank of the machine head for recycling. The liquid bag and the control equipment are added into the machine head liquid tank, so that the liquid level height of the coating in the machine head liquid tank is reduced, the coating can be normally sprayed under a lower liquid level, the use amount of the coating is effectively saved, and the production cost is reduced.
Example (b):
the invention provides a processing method of a plate glass heat insulation coating, as shown in figure 1, a liquid bag and control equipment are added in a machine head liquid tank, the liquid level height of a coating in the machine head liquid tank is reduced, and the coating can be normally coated under a lower liquid level. Effectively saves the using amount of the coating and reduces the production cost. The invention can be used for newly producing the curtain coating equipment or transforming the original equipment. The process equipment principle is shown in figure 5.
(1) Make liquid bag 1 according to the inner chamber size of aircraft nose cistern 2, aircraft nose cistern 2 and liquid bag 1 all are the open container of cuboid form, the outside length and the width of liquid bag 2 are the same with the inner chamber of aircraft nose cistern 2, the height ratio aircraft nose cistern 2 of liquid bag 2 is lower, make liquid bag 2 basically can cover the top surface of aircraft nose cistern 2, prevent that the coating of aircraft nose cistern 2 from volatilizing, liquid bag 2 has the effect of visor, the material chooses for use plastics (polyethylene PE or polyvinyl chloride PVC), the liquid bag of injection liquid floats in the coating top, and can freely float from top to bottom along with the liquid level goes up and down. The liquid in the sac is determined according to the type of the paint, and the density of the liquid is slightly lower than that of the paint. The glass heat-insulating coating mainly comprises nanometer materials (such as antimony tin oxide ATO solution, indium tin oxide ITO solution, zinc aluminum oxide AZO solution, gallium zinc oxide GZO solution, and nanometer tungsten oxide WO) 3 Solution) and various resins (e.g.: acrylic resin, polyurethane resin, silicone-acrylic resin, etc.) and other coating additives (such as: wetting agent, curing agent, leveling agent and defoaming agentAgents, stabilizers, coupling agents, etc.). The liquid is water or industrial alcohol, and the content of ethanol in the industrial alcohol is generally 95% and 99%.
The description is given with flow coated 1.8m wide glass:
size of handpiece liquid tank 2: 1800mm 300mm 400 mm; size of the sac 2: 1800mm 300mm 200 mm;
calculating by using the height of the liquid level of the coating in the handpiece liquid tank 2 to be 25cm, wherein the volume of the coating in the handpiece liquid tank 2 is as follows: 1800mm 300mm 250mm 135000000mm 3 ＝0.135m 3 The weight of the material is about 175Kg (1300 Kg/m) 3 (coating Density) 0.135m 3 ＝175.5Kg)。
The description is given by ATO coating:
the unit price of ATO powder is 1500 yuan/kg, and about 35 kg of coating is prepared from 1 kg of powder. 175Kg of coating requires 5Kg of powder, 7500 yuan (price without other auxiliary materials).
Placing into a 20cm high bag 2 (size: 1800 × 300 × 200mm), maintaining the coating liquid level height of handpiece liquid tank 2 at 10cm, and coating volume 1800 × 300 × 100 ═ 135000000mm 3 ＝0.054m 3 (70.2Kg), the price of the coating in the handpiece liquid tank 2 is about 3000 yuan.
At least the same volume of paint as that in the handpiece liquid tank 2 is contained in the paint container 5 to keep the liquid level in the handpiece liquid tank 2 stable. When the shower coating operation is stopped for 24 hours, the coating in the handpiece liquid tank 2 and the coating container 5 is invalid due to volatilization and oxidation of the coating auxiliary agent. Thus, when production is discontinued or interrupted for a longer period of time, the material loss per time is about 1.5 ten thousand yuan, and the material loss per time after the use of the sac is about 0.6 ten thousand yuan. The loss is reduced by 0.9 ten thousand yuan/time. If the expensive ITO coating is used, the cost is saved more obviously.
The reference prices of part of the raw materials (powders) are shown in the following table, table 1
TABLE 1 price of raw materials (powder)
| Serial number | Product name | Unit of | Monovalent (Yuan/kg) |
| 1 | ITO | KG | 8000.00 |
| 2 | ATO | KG | 1500.00 |
In addition, the head liquid tank 2 is of an airtight structure, and the coating in the tank is easy to volatilize and oxidize. After the liquid sac is arranged, the liquid sac 1 serves as a floating protective cover, and the coating in the handpiece liquid groove 2 is completely covered by the liquid sac 1 and is basically isolated from air, so that the coating is well protected.
(2) The machine head liquid tank 2 and the liquid bag 1 are respectively provided with peristaltic pumps (a first peristaltic pump 4 and a second peristaltic pump 7) with different flow rates, the volume of the coating in the machine head liquid tank 2 is controlled by the first peristaltic pump 4, and the volume of the liquid in the liquid bag 1 is controlled by the second peristaltic pump 7; injecting liquid into the liquid tank and the liquid bag respectively, taking the glass coated with 1.8m width as an example, the size of the handpiece liquid tank 2 is as follows: 1800 × 300 × 400mm, sac 2 size: 1800 x 300 x 200mm, height ratio of about 2: 1. The peristaltic pump can realize high-precision continuous transmission and quantitative transmission of the liquid to be conveyed. The two liquids are respectively stored in the container, the coating and the liquid are respectively stored in the coating container 5 and the liquid container 6, the curtain coating equipment adopts dead weight type curtain coating, the coating is sprayed from a narrow slit (0.5-1 mm), the liquid level of the liquid tank 2 of the machine head is kept at about 25cm, and the pressure of the coating on a curtain coating knife edge is 0.15-0.35 MPa.
(3) And a pressure sensor is arranged at the bottom of the liquid tank to display the pressure in real time, and the pressure at the bottom of the liquid tank of the machine head is displayed during spraying. By means of the peristaltic pump 4, the peristaltic pump 7 precisely controls the amount of liquid so that the pressure is maintained within a set range. After the liquid bag is arranged, the height of the liquid level of the coating in the handpiece liquid tank 2 is kept at 10cm, and the liquid (the specific gravity is less than or equal to the coating) with the height of 15-20cm is injected into the liquid bag 2, so that the pressure of the sprayed coating reaches 0.15-0.35 MPa (a pressure sensor is arranged at the bottom of the handpiece liquid tank 2, and the pressure value is accurately controlled).
(4) When the device works, the conveying device on the workbench 3 drives the coated flat glass to pass through the coating curtain below the machine head at a constant speed, and a uniform coating film is formed on the upper surface of the flat glass. The excess coating flows back to the container 5 and is pumped to the handpiece liquid tank for recycling.
In the machine head liquid tank 2, the pressure of the coating is 0.25MPa or 0.30MPa or 0.35MPa, and the viscosity of the coating is generally controlled within a range of 30-80 s; defoaming agent and leveling agent in proper proportion are added into the paint to keep the performance of the paint stable; the conveying speed of the conveying belt is 70-90 m/min, a coating film with uniform film thickness can be obtained, and the difference of the film thickness can be controlled within 1-2 mu m. The main process parameters of the curtain coating of the invention are shown in table 2.
TABLE 2 Main Process parameters for curtain coating
| Item | Process parameters |
| Coating viscosity (coat-4)/s | 35～60 |
| Coating temperature/. degree.C | 20～25 |
| Flow coating time/ |
1～3 |
| Residence time/min | 8～30 |
| Gap width/mm of dead weight type flow coating knife edge | 0.5～1mm |
| pressure/MPa of curtain coating knife edge | 0.25～0.35 |
The liquid bag and the control equipment are added into the machine head liquid tank, so that the liquid level height of the coating in the machine head liquid tank is reduced, the coating can be normally sprayed under a lower liquid level, the use amount of the coating is effectively saved, and the production cost is reduced.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. In order that the components of the present invention may be combined without conflict, it is within the scope of the present invention that any person skilled in the art may make equivalent changes and modifications without departing from the spirit and principle of the present invention.
Claims (10)
1. The processing method of the heat-insulating coating film for the flat glass is characterized in that the processing method adopts a curtain coating process to coat the film, and comprises the following steps:
a liquid sac (1) is arranged in the machine head liquid groove (2);
adding a coating into the handpiece liquid tank (2), adding a liquid into the liquid bag (1), wherein the density of the liquid is equal to or less than that of the coating, so that the liquid bag (1) floats above the coating in the handpiece liquid tank (2);
during spray coating, the coated object is driven to pass through the lower part of the head liquid tank (2), and the coating is sprayed through the head liquid tank (2) under the dual effects of the self weight and the pressure of the liquid bag (1) to form a coating film on the surface of the coated object.
2. The method for processing the flat glass heat insulation coating film according to claim 1, wherein the volume of the coating in the handpiece liquid tank (2) is controlled by a first peristaltic pump (4), and the volume of the liquid in the liquid bag (1) is controlled by a second peristaltic pump (7).
3. The method for processing a flat glass thermal insulation coating film according to claim 2, wherein the first peristaltic pump (4) is connected with the paint container (5), and the second peristaltic pump (7) is connected with the liquid container (6).
4. The method of claim 1, wherein after the coating film is formed on the surface of the object to be coated, the excess coating material is returned to the coating material container (5).
5. The method for processing a heat insulating coating film for sheet glass according to claim 1, wherein the pressure at the bottom of the liquid tank (2) of the head is displayed during spraying.
6. The method for processing the flat glass heat insulation coating film according to claim 1, wherein the material of the liquid bag (1) adopts polyethylene PE or polyvinyl chloride PVC.
7. The method for processing a heat insulating film for sheet glass according to claim 1, wherein the pressure of the coating is 0.15 to 0.35 MPa.
8. A method for producing a sheet glass thermal barrier coating according to claim 3, wherein the first peristaltic pump (4) has a higher flow rate than the second peristaltic pump (7).
9. The method as claimed in claim 1, wherein the liquid is a water-based paint.
10. The method for processing a heat insulating film for a sheet glass according to claim 1, further comprising:
after a coated object is formed into a film layer, the film layer is dried in a room temperature dust-free environment, and then the dried film layer is placed into an oven with the temperature of 80-120 ℃ for curing for 3-4 h, so that a hard film layer with the thickness of 7-12 mu m is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210515749.4A CN114853351B (en) | 2022-05-11 | 2022-05-11 | Processing method of heat-insulating coating film of plate glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210515749.4A CN114853351B (en) | 2022-05-11 | 2022-05-11 | Processing method of heat-insulating coating film of plate glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114853351A true CN114853351A (en) | 2022-08-05 |
| CN114853351B CN114853351B (en) | 2023-10-13 |
Family
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| CN114853351B (en) | 2023-10-13 |
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