CN114213895A - Process quality control method of water-based household appliance color steel primer coating - Google Patents
Process quality control method of water-based household appliance color steel primer coating Download PDFInfo
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G01B11/0616—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating
- G01B11/0675—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating using interferometry
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention relates to the technical field of water-based paint, and discloses a process quality control method of water-based home appliance color steel primer paint, which comprises the steps of adding a proper amount of deionized water into the water-based paint for dilution; fully shaking up or stirring the water-based paint uniformly, wherein the water-based paint is mixed according to the following mass ratio: 1, deionized water: (0-5%); and fully shaking or stirring the water-based paint uniformly. When the process quality control method of the water-based household appliance color steel primer coating is used, deionized water is used as a dispersion medium, the primer is a hard and durable water-based household appliance top-coated high-temperature baking paint primer, compared with a solvent-based color steel plate coating, the primer has the characteristics of low Volatile Organic Compound (VOC), low odor, high covering rate and the like, is a primer coating with a hard and compact paint film, is pollution-resistant, high in fullness, excellent in adhesive force and leveling property, has excellent light storage property and color storage property, is suitable for thicker film thickness (more than 25 mu m), and needs to be subjected to a two-coating process.
Description
Technical Field
The invention relates to the technical field of water-based paint, in particular to a process quality control method of water-based home appliance color steel primer paint.
Background
The DEVCRYL technology water-based color steel plate primer is a water-based color steel plate primer special for roll coating of household appliances with advanced technology and excellent quality, adopts deep Seal synthesized water-based resin and pigment, is matched with environment-friendly materials such as functional filler, special auxiliary agent and the like, and is suitable for metal antirust coating of household appliances, refrigerators, washing machines, air conditioner steel panels and the like. The high-temperature baking varnish product with full functions and no yellowing is ideal water paint for household appliance plates such as refrigerators, air-conditioning wall machines, washing machines, television panels and the like.
According to the patent No. CN201811300120.8, a water-based coating method of powder coating is disclosed, the powder coating and water are added with 0.5-3% of defoaming agent according to the mass ratio of 1 (0.6-1), grinding and stirring are carried out uniformly, the coating is coated on a test plate through a coating machine, solidification is carried out at a step temperature, the water-based coating of the powder coating is completed after cooling to room temperature, but the wave mark flatness generated on the surface of the water-based coating before solidification is easy to be low through air blowing solidification and air flow, and the coating effect is influenced, according to the patent No. CN201810928940.5, a water-based coating spraying process and application thereof are disclosed, including spraying primer on the surface of a dry workpiece; carrying out flash drying operation on the primer sprayed on the surface of the workpiece; spraying finish paint on the surface of the workpiece sprayed with the primer; and curing the primer and the finish paint sprayed on the workpiece. Wherein the primer and the finish paint are water-based paints; the flash drying operation temperature is 50-80 ℃, but the electrostatic spraying is easy to cause the paint and the surface to be coated to be stained with dust, which affects the structure of the sprayed paint, and the stability is low, according to the patent number CN96104867.0, a formula and a process method of the brocade water paint are disclosed, 0.7kg of polyvinyl alcohol is added into 8kg of water for heating, the polyvinyl alcohol is completely dissolved and filtered, a film forming auxiliary agent is added, titanium pigment, light calcium powder, talcum powder and the like are added for grinding to obtain a finished product, although the manufacturing process is simple, the natural curing efficiency at room temperature is low, and the working requirement of the process quality control method of the paint can not be met, thus providing a process quality control method of the water-based household appliance color steel primer paint.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a process quality control method of a water-based household appliance color steel primer coating, and solves the technical problems in the background technology.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a process quality control method of a water-based home appliance color steel primer coating specifically comprises the following steps: adding a proper amount of deionized water into the water-based paint for dilution;
fully shaking up or stirring the water-based paint uniformly, wherein the water-based paint is mixed according to the following mass ratio: 1, deionized water: (0-5%);
fully shaking or stirring the water-based paint uniformly, and filtering the water-based paint by using a 300-mesh filter screen;
when coating in a laboratory, a wire bar scraper plate and an original paint are used for scraping, or a scraper plate is used after 0-5% deionized water is added for dilution, if coating is finished, the viscosity of the water-based paint is controlled to be 4 cups/35-60 seconds;
the temperature of the drying wire body is 180 ℃ and 350 ℃, the plate temperature is 216-232 ℃, and the drying time is 20-35 seconds.
Preferably, the surface to be coated is cleaned by using an oil removal agent or a cleaning agent before use, so as to remove wax, oil stains and dust impurities on the surface to be coated.
Preferably, the coating is constructed by adopting a roller coating method when the coating is on line, a proper amount of water is added for diluting, excessive water is not added, the water is used for diluting, the acid bias is avoided, the principle of a small amount of times of dilution is followed, and the roller coating oil output linear speed when the coating is on line is as follows: 60-100 m/min.
Preferably, the tools and containers using the water-based paint should be of a material that does not react with water or have a suitable internal coating treatment, and should be applied with strict exclusion of mixing with other paints and organic solvents to prevent deterioration.
Preferably, the unsealed paint is used up in as little as 8 hours, the paint is stored separately with the rest, the pH value is maintained at 7.0-8.0 when the paint is reused, and the water paint needs to be tested first when being recoated to prevent the interlayer adhesion loss.
Preferably, the theoretical coating rate is 390 square meters per square meter.
Preferably, each coating and the final coating are subjected to dry film thickness detection by an electronic dry film thickness meter, and when the film thickness is insufficient, the coating needs to be supplemented to the specified dry film thickness, wherein the dry film thickness is 5-8 μm, and the wet film thickness is 10-15 μm.
Preferably, the temperature range of the plate temperature in 30 seconds is 216-224 ℃, the temperature range of the plate temperature in 25 seconds is 224-232 ℃, the temperature range of the furnace temperature in 30 seconds is 180-350 ℃, and the temperature range of the furnace temperature in 25 seconds is 180-350 ℃.
Preferably, before each coat and the final coat need to be subjected to dry film thickness detection by an electronic dry film thickness meter, the method further comprises the following steps:
collecting a first image of a coating surface;
inputting the first image into a first quadrant of a preset coordinate system, and respectively acquiring a pixel coordinate corresponding to each pixel point;
respectively acquiring the color corresponding to each pixel point on the first image;
counting the paint colors acquired from the first image;
respectively establishing corresponding color layers according to different paint colors, acquiring pixel coordinates corresponding to pixel points with the same paint color, inputting the pixel coordinates into the corresponding color layers, and drawing corresponding color patterns;
carrying out pixel overlapping degree detection on each color pattern and each historical image in the historical image set respectively, extracting the overlapping part of each color pattern and the corresponding historical image to form a first pattern contour, and forming a pattern set according to all the first pattern contours;
dividing the first image into a preset number of image rows, respectively counting pattern outlines corresponding to each image row, marking and displaying the image rows on the second quadrant, and determining the number of complete patterns and the number of incomplete patterns in the first image according to a marking display result and a pattern set;
when the incomplete pattern number is 0, judging whether the finished pattern number is equal to a preset number or not;
if not, generating quantity error information, and transmitting the quantity error information to a preset terminal for displaying;
and otherwise, generating pattern incomplete information, and transmitting the pattern incomplete information to the preset terminal for displaying.
Preferably, the coating surface is irradiated by preset first light;
acquiring a refraction signal in a first incident direction in which the preset first light irradiates the coating surface;
dividing the refraction signal into an interference waveform and a detection waveform based on the first incidence direction;
acquiring a plurality of detection peak values of the detection waveform, and extracting a maximum peak value from the detection peak values;
obtaining a plurality of interference peak values of the interference waveform;
obtaining the current thickness of the coating surface in a preset thickness-ratio list according to the ratio of the maximum peak value to the average value of the plurality of interference peak values, and judging whether the current thickness of the coating surface meets the coating standard or not;
if not, marking a plurality of detection points on the coating surface by using an equal spacing method based on the area of the coating surface;
irradiating the coating surface by using preset second light and respectively acquiring an interference spectrum corresponding to each detection point;
respectively acquiring the spectrum phase difference between each detection point and an adjacent detection point, and establishing an interference phase matrix by taking the interference spectrum and the spectrum phase difference as element coefficients;
respectively obtaining the dispersion degree of each row element coefficient on the interference phase matrix, and extracting the row elements to be detected with the dispersion degree higher than the preset dispersion degree;
respectively drawing the spectral direction corresponding to each element to be detected, and eliminating interference spectra with consistent spectral directions to obtain defect elements;
and acquiring the position corresponding to each defect element on the interference phase matrix, generating a thickness adjusting area, and transmitting the thickness adjusting area to a preset terminal for displaying.
(III) advantageous effects
Compared with the prior art, the invention provides a process quality control method of the water-based household appliance color steel primer coating, which has the following beneficial effects:
the process quality control method of the water-based household appliance color steel primer coating is refined by taking deionized water as a dispersion medium and combining with advanced micro technology, is a hard and durable primer of a surface-coated high-temperature baking paint for water-based household appliances, has the characteristics of low Volatile Organic Compound (VOC), low odor, high covering rate and the like compared with solvent-based color steel plate paint, is a primer with a hard and compact paint film, is pollution-resistant, high in fullness, excellent in adhesive force and leveling property, has excellent light storage property and color storage property, is suitable for thicker film thickness (more than 25 mu m), and needs to be used for a secondary coating process.
The process quality control method of the water-based household appliance color steel primer coating comprises the steps of acquiring a first image of a coating surface, and obtaining the pattern on the coating surface through the color distribution of the coating on the first image, judging whether the pattern is qualified according to a historical record, generating corresponding defect information in time when the pattern is unqualified, and transmitting the defect information to a specified terminal for displaying so that workers can perform color complementing work in time.
The technical quality control method of the water-based household appliance color steel primer coating comprises the steps of irradiating a coating surface by utilizing light rays to obtain a refraction signal of the coating surface, dividing the refraction signal into an interference waveform and a detection waveform, judging whether the current thickness of the coating surface meets a coating standard or not by comparing a maximum peak value of the detection waveform with an average peak value of the interference waveform, marking a plurality of detection points on the coating surface to establish an interference phase matrix, obtaining corresponding defect elements, transmitting the corresponding defect elements to a preset terminal to be displayed, and reminding workers of repairing.
Drawings
FIG. 1 is a schematic view of a simple process for preparing the present invention;
FIG. 2 is a schematic diagram showing experimental data of various conditions in the preparation process of the primer coating of the present invention;
FIG. 3 is a schematic diagram of experimental data of boiling resistance, film gloss and impact resistance of the primer coating after being dried at different temperatures and times.
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.
Example one
As shown in fig. 1, the invention provides a technical scheme, and a process quality control method of a water-based home appliance color steel primer coating specifically comprises the following steps:
s110, adding a proper amount of deionized water into the water-based paint for dilution, cleaning the surface to be coated by using an ultrasonic cleaner before use, removing wax, oil stain and dust impurities on the surface to be coated, using the unsealed paint material within 8 hours as far as possible, storing the residual paint in a container containing internal coating treatment, maintaining the pH value to be 7.5 when the residual paint is used, and testing the residual paint to prevent the interlayer adhesion loss when the water-based paint is re-coated;
s120, fully shaking or uniformly stirring the water-based paint, wherein the water-based paint is mixed according to the mass ratio: 1, deionized water: (0-5%), tools and containers using water-based paint should be non-reactive with water (such as stainless steel, plastic, etc.) or have proper internal coating treatment, and should be strictly prohibited from mixing with other paint and organic solvent during construction to prevent deterioration;
s130, fully shaking or uniformly stirring the water-based paint, and filtering the water-based paint by using a 300-mesh filter screen;
s140, scraping by using a line bar scraper blade and raw paint or scraping by adding 2% deionized water for thinning after the coating in a laboratory, controlling the viscosity of the water-based paint to be 4 cups/55 seconds if the coating is on line, adopting a roller coating method for construction when the coating is on line, adding a proper amount of water for diluting, not adding excessive water for diluting with water, avoiding acid bias, following the principle of a small amount of times when diluting, and roller coating oil output linear speed when the coating is on line is as follows: 60-100 m/min, the theoretical coating rate is 390 square meters per square meter per kilogram, and the actual coating rate depends on the surface conditions of the substrate (the flatness and the roughness of the coating surface);
s150, the temperature of the drying line body is 200 ℃, the plate temperature is 224 ℃, the drying time is 33 seconds, each coating and the final coating need to be subjected to dry film thickness detection by an electronic dry film thickness meter, when the film thickness is insufficient, the coating needs to be coated to the specified dry film thickness according to the requirement, the dry film thickness is 6 micrometers, the wet film thickness is 12 micrometers, the plate temperature during baking is in a 30-second temperature range of 220 ℃, the plate temperature in a 25-second temperature range of 230 ℃, the furnace temperature in a 30-second temperature range of 240 ℃, the furnace temperature in a 25-second temperature range of 320 ℃, and the experimental data are shown in fig. 2 and fig. 3.
Example two
As shown in fig. 1, the invention provides a technical scheme, and a process quality control method of a water-based home appliance color steel primer coating specifically comprises the following steps:
s110, adding a proper amount of deionized water into the water-based paint for dilution, cleaning the surface to be coated with a surfactant before use, removing wax, oil stain and dust impurities on the surface to be coated, using the unsealed paint material within 8 hours as far as possible, storing the residual paint separately, maintaining the pH value to be 7.5 when the paint is used again, and testing the water-based paint when the water-based paint is used again to prevent the interlayer adhesive force from losing;
s120, fully shaking or uniformly stirring the water-based paint, wherein the water-based paint is mixed according to the mass ratio: 1, deionized water: (0-5%), tools and containers using water-based paint should be non-reactive with water (such as stainless steel, plastic, etc.) or have proper internal coating treatment, and should be strictly prohibited from mixing with other paint and organic solvent during construction to prevent deterioration;
s130, fully shaking or uniformly stirring the water-based paint, and filtering the water-based paint by using an automatic vibrating screen;
s140, scraping by using a line bar scraper blade and raw paint or scraping by adding 3% deionized water after thinning during laboratory coating, controlling the viscosity of the water-based paint to be 4 cups/40 seconds when coating is on line, adopting a roller coating method for construction when coating is on line, adding proper amount of water for diluting, not adding excessive amount of water for diluting with water, avoiding acid bias, following the principle of a small amount of times when diluting, and roller coating oil output linear speed when coating is on line is as follows: 65 m/min, the theoretical coating rate is 390 square meters per square meter;
s150, the temperature of the drying line body is 220 ℃, the plate temperature is 225 ℃, the drying time is 26 seconds, each coating and the final coating need to be subjected to dry film thickness detection by an electronic dry film thickness meter, when the film thickness is insufficient, the coating needs to be coated to the specified dry film thickness according to the requirement, the dry film thickness is 6 micrometers, the wet film thickness is 12 micrometers, the plate temperature during baking is in a 30-second temperature range of 220 ℃, the plate temperature in a 25-second temperature range of 230 ℃, the furnace temperature in a 30-second temperature range of 240 ℃, the furnace temperature in a 25-second temperature range of 320 ℃, and the experimental data are shown in figures 2 and 3.
EXAMPLE III
As shown in fig. 1, the invention provides a technical scheme, and a process quality control method of a water-based home appliance color steel primer coating specifically comprises the following steps:
s110, adding a proper amount of deionized water into the water-based paint for dilution, polishing the surface to be coated before use, then carrying out electroplating degreasing cleaning by using an electroplating machine, removing wax, oil stain and dust impurities on the surface to be coated, using the unsealed paint material within 8 hours as much as possible, storing the residual paint separately, maintaining the pH value to be 7.5 when the paint is used again, and testing the water-based paint when the paint is used again to prevent the interlayer adhesive force from losing;
s120, fully shaking or uniformly stirring the water-based paint, wherein the water-based paint is mixed according to the mass ratio: 1, deionized water: (0-5%), tools and containers using water-based paint should be non-reactive with water (such as stainless steel, plastic, etc.) or have proper internal coating treatment, and should be strictly prohibited from mixing with other paint and organic solvent during construction to prevent deterioration;
s130, fully shaking or uniformly stirring the water-based paint, and filtering the water-based paint by using a 300-mesh filter screen;
s140, scraping by using a wire rod scraper blade and raw paint or scraping by adding 0-5% deionized water after diluting, if coating is on line, controlling the viscosity of the water-based paint to be 4 cups/38 seconds, applying the roller coating method for construction when coating is on line, adding a proper amount of water for diluting, not adding excessive water for diluting with water, avoiding acid bias, following the principle of a small amount of times when diluting, and applying the roller coating oil output line speed when coating is on line as follows: 75 meters per minute, the theoretical coating rate is 390 square meters per square meter;
s150, the temperature of the drying line body is 320 ℃, the plate temperature is 228 ℃, the drying time is 32 seconds, each coating and the final coating need to be subjected to dry film thickness detection by an electronic dry film thickness meter, when the film thickness is insufficient, the coating needs to be coated to the specified dry film thickness according to the requirement, the dry film thickness is 6 micrometers, the wet film thickness is 12 micrometers, the plate temperature during baking is in a 30-second temperature range of 220 ℃, the plate temperature in a 25-second temperature range of 230 ℃, the furnace temperature in a 30-second temperature range of 240 ℃, the furnace temperature in a 25-second temperature range of 320 ℃, and the experimental data are shown in fig. 2 and fig. 3.
Example four
As shown in fig. 1, the invention provides a technical scheme, and a process quality control method of a water-based home appliance color steel primer coating specifically comprises the following steps:
s110, adding a proper amount of deionized water into the water-based paint for dilution, polishing the surface to be coated before use, then carrying out electroplating degreasing cleaning by using an electroplating machine, removing wax, oil stain and dust impurities on the surface to be coated, using the unsealed paint material within 8 hours as much as possible, storing the residual paint separately, maintaining the pH value to be 7.5 when the paint is used again, and testing the water-based paint when the paint is used again to prevent the interlayer adhesive force from losing;
s120, fully shaking or uniformly stirring the water-based paint, wherein the water-based paint is mixed according to the mass ratio: 1, deionized water: (0-5%), tools and containers using water-based paint should be non-reactive with water (such as stainless steel, plastic, etc.) or have proper internal coating treatment, and should be strictly prohibited from mixing with other paint and organic solvent during construction to prevent deterioration;
s130, fully shaking or uniformly stirring the water-based paint, and filtering the water-based paint by using a 300-mesh filter screen;
s140, scraping by using a line bar scraper blade and raw paint or scraping by adding 4% deionized water for thinning after the raw paint is coated in a laboratory, controlling the viscosity of the water-based paint to be 4 cups/50 seconds if the coating is on line, adopting a roller coating method for construction when the coating is on line, adding a proper amount of water for diluting, not adding excessive water for diluting with water, avoiding acid bias, following the principle of a small amount of times when the water is diluted, and roller coating oil yield line speed when the coating is on line is as follows: 95 m/min, the theoretical coating rate is 390 square meters per square meter;
s150, the temperature of the drying line body is 330 ℃, the plate temperature is 228 ℃, the drying time is 28 seconds, each coating and the final coating need to be subjected to dry film thickness detection by an electronic dry film thickness meter, when the film thickness is insufficient, the coating needs to be coated to the specified dry film thickness according to the requirement, the dry film thickness is 6 micrometers, the wet film thickness is 12 micrometers, the plate temperature during baking is in a 30-second temperature range of 220 ℃, the plate temperature in a 25-second temperature range of 230 ℃, the furnace temperature in a 30-second temperature range of 240 ℃, the furnace temperature in a 25-second temperature range of 320 ℃, and the experimental data are shown in fig. 2 and fig. 3.
EXAMPLE five
As shown in fig. 1, the invention provides a technical scheme, and a process quality control method of a water-based home appliance color steel primer coating specifically comprises the following steps:
s110, adding a proper amount of deionized water into the water-based paint for dilution, polishing the surface to be coated before use, then carrying out electroplating degreasing cleaning by using an electroplating machine, removing wax, oil stain and dust impurities on the surface to be coated, using the unsealed paint material within 8 hours as much as possible, storing the residual paint separately, maintaining the pH value to be 7.5 when the paint is used again, and testing the water-based paint when the paint is used again to prevent the interlayer adhesive force from losing;
s120, fully shaking or uniformly stirring the water-based paint by using a shaking machine, wherein the water-based paint is mixed according to the mass ratio: 1, deionized water: (0-5%), tools and containers using water-based paint should be non-reactive with water (such as stainless steel, plastic, etc.) or have proper internal coating treatment, and should be strictly prohibited from mixing with other paint and organic solvent during construction to prevent deterioration;
s130, fully shaking or uniformly stirring the water-based paint by using a shaking machine, and filtering the water-based paint by using a 300-mesh filter screen;
s140, scraping by using a line bar scraper blade and raw paint or scraping by adding 4% deionized water for thinning after the raw paint is coated in a laboratory, controlling the viscosity of the water-based paint to be 4 cups/50 seconds if the coating is on line, adopting a roller coating method for construction when the coating is on line, adding a proper amount of water for diluting, not adding excessive water for diluting with water, avoiding acid bias, following the principle of a small amount of times when the water is diluted, and roller coating oil yield line speed when the coating is on line is as follows: 95 m/min, the theoretical coating rate is 390 square meters per square meter;
s150, the temperature of the drying line body is 330 ℃, the plate temperature is 228 ℃, the drying time is 28 seconds, each coating and the final coating need to be subjected to dry film thickness detection by an electronic dry film thickness meter, when the film thickness is insufficient, the coating needs to be coated to the specified dry film thickness according to the requirement, the dry film thickness is 6 micrometers, the wet film thickness is 12 micrometers, the plate temperature during baking is in a 30-second temperature range of 220 ℃, the plate temperature in a 25-second temperature range of 230 ℃, the furnace temperature in a 30-second temperature range of 240 ℃, the furnace temperature in a 25-second temperature range of 320 ℃, and the experimental data are shown in fig. 2 and fig. 3.
The working principle of the device is as follows: firstly, when the water paint is operated, the material which does not react with water (such as stainless steel, plastic and the like) is required to be used or the proper internal coating treatment is carried out, when the water paint is used, the water paint is strictly forbidden to be mixed with other paint and organic solvent to prevent deterioration, then deionized water is added into the water paint for dilution, the diluted deionized water is uniformly stirred, a 300-mesh filter screen is used for filtering the water-based paint, the surface to be coated is cleaned by using a degreasing agent or a cleaning agent before use, wax, oil stain and dust impurities on the surface to be coated are removed, then a line bar scraper blade is used, raw paint is scraped or 0-5% of deionized water is added for thinning, and then a scraper plate is scraped, the roller coating method is adopted for construction when the coating is on line, a proper amount of water is added for diluting, excessive water is not added, the water is used for diluting, the acid bias is avoided, the principle of a small amount of times of dilution is followed, and the roller coating oil output linear speed is as when the coating is on line: 60-100 m/min, controlling the viscosity of the water paint to be 4 cups/35-60 s, controlling the theoretical coating rate to be 390 square meters per square meter per.
EXAMPLE six
The invention provides a technical scheme, and a process quality control method of a water-based household appliance color steel primer coating, which specifically comprises the following steps:
collecting a first image of a coating surface;
inputting the first image into a first quadrant of a preset coordinate system, and respectively acquiring a pixel coordinate corresponding to each pixel point;
respectively acquiring the color corresponding to each pixel point on the first image;
counting the paint colors acquired from the first image;
respectively establishing corresponding color layers according to different paint colors, acquiring pixel coordinates corresponding to pixel points with the same paint color, inputting the pixel coordinates into the corresponding color layers, and drawing corresponding color patterns;
carrying out pixel overlapping degree detection on each color pattern and each historical image in the historical image set respectively, extracting the overlapping part of each color pattern and the corresponding historical image to form a first pattern contour, and forming a pattern set according to all the first pattern contours;
dividing the first image into a preset number of image rows, respectively counting pattern outlines corresponding to each image row, marking and displaying the image rows on the second quadrant, and determining the number of complete patterns and the number of incomplete patterns in the first image according to a marking display result and a pattern set;
when the incomplete pattern number is 0, judging whether the finished pattern number is equal to a preset number or not;
if not, generating quantity error information, and transmitting the quantity error information to a preset terminal for displaying;
and otherwise, generating pattern incomplete information, and transmitting the pattern incomplete information to the preset terminal for displaying.
In this example, the color layer represents an operation space established according to different paint colors for drawing corresponding color patterns;
in this example, the color pattern represents the pattern displayed on each color layer;
in this example, the first tread outline represents an overlapping portion of the color pattern and the history image;
in this example, the set of patterns represents a set containing all the second patterns;
in this example, the number error information indicates that the number of patterns on the coating surface is incorrect and does not conform to the preset number;
in this example, the pattern chipping information indicates that chipping of the pattern on the coating surface has occurred.
The working principle and the beneficial effects of the technical scheme are as follows: the process quality control method of the water-based household appliance color steel primer coating comprises the steps of acquiring a first image of a coating surface, and obtaining the pattern on the coating surface through the color distribution of the coating on the first image, judging whether the pattern is qualified according to a historical record, generating corresponding defect information in time when the pattern is unqualified, and transmitting the defect information to a specified terminal for displaying so that workers can perform color complementing work in time.
EXAMPLE seven
The invention provides a technical scheme, and a process quality control method of a water-based household appliance color steel primer coating, which specifically comprises the following steps:
irradiating the coating surface by using a preset first light;
acquiring a refraction signal in a first incident direction in which the preset first light irradiates the coating surface;
dividing the refraction signal into an interference waveform and a detection waveform based on the first incidence direction;
acquiring a plurality of detection peak values of the detection waveform, and extracting a maximum peak value from the detection peak values;
obtaining a plurality of interference peak values of the interference waveform;
obtaining the current thickness of the coating surface in a preset thickness-ratio list according to the ratio of the maximum peak value to the average value of the plurality of interference peak values, and judging whether the current thickness of the coating surface meets the coating standard or not;
if not, marking a plurality of detection points on the coating surface by using an equal spacing method based on the area of the coating surface;
irradiating the coating surface by using preset second light and respectively acquiring an interference spectrum corresponding to each detection point;
respectively acquiring the spectrum phase difference between each detection point and an adjacent detection point, and establishing an interference phase matrix by taking the interference spectrum and the spectrum phase difference as element coefficients;
respectively obtaining the dispersion degree of each row element coefficient on the interference phase matrix, and extracting the row elements to be detected with the dispersion degree higher than the preset dispersion degree;
respectively drawing the spectral direction corresponding to each element to be detected, and eliminating interference spectra with consistent spectral directions to obtain defect elements;
and acquiring the position corresponding to each defect element on the interference phase matrix, generating a thickness adjusting area, and transmitting the thickness adjusting area to a preset terminal for displaying.
In this example, the predetermined first light may be a white light;
in this example, the first incident direction represents an angle at which a predetermined light beam irradiates the coating surface;
in this example, the interference waveform represents the signal portion of the refraction signal in the atmosphere, and the detection waveform represents the signal portion of the refraction signal on the surface of the coating;
in this example, the number of maximum peaks is 1, and the number of interference peaks is several;
in this example, the equidistant method means a method of selecting an appropriate detection pitch according to the length and width of the coated surface;
in this example, the predetermined second light may be low coherence light;
in this example, the spectral phase difference represents the average difference between the spectrum of one detection point and the spectra of two adjacent detection points.
The working principle and the beneficial effects of the technical scheme are as follows: the technical quality control method of the water-based household appliance color steel primer coating comprises the steps of irradiating a coating surface by utilizing light rays to obtain a refraction signal of the coating surface, dividing the refraction signal into an interference waveform and a detection waveform, judging whether the current thickness of the coating surface meets a coating standard or not by comparing a maximum peak value of the detection waveform with an average peak value of the interference waveform, marking a plurality of detection points on the coating surface to establish an interference phase matrix, obtaining corresponding defect elements, transmitting the corresponding defect elements to a preset terminal to be displayed, and reminding workers of repairing.
Example eight
The invention provides a technical scheme, and a process quality control method of a water-based household appliance color steel primer coating, which specifically comprises the following steps:
after drying, cooling the coating surface to a specified temperature range;
acquiring the current humidity and the current temperature of the environment where the coating surface is located;
calculating the odor diffusion coefficient of the coating surface under the current humidity and the current temperature according to a formula (I);
K＝a·f+b·exp(t1-t0) (Ⅰ)
wherein K represents the odor diffusion coefficient of the painted surface at the current humidity and the current temperature, a represents the humidity representative value at the standard humidity, f represents the current humidity, b represents the temperature representative value at the standard temperature, t represents1Representing said current temperature, t0Represents a standard temperature;
when the odor diffusion coefficient of the coating surface under the current humidity and the current temperature is within a preset range, placing the coating surface at a preset first position, blowing the coating surface by using a fan with a preset wind speed, and calculating the blowing working time length T of the fan according to a formula (II);
wherein S represents the area of the coating surface, a1Indicates the amount of diffusion per unit area of the corresponding coated surface before blowing with a blower, a2Indicating that the corresponding second position odor concentration reaches the standard concentration c under the condition that the fan is not adopted for blowing0At this time, the amount of diffusion per unit area of the corresponding coating surface, v1(k) Indicating that the standard diffusion rate of the odor of the coated surface was obtained based on the diffusion rate-diffusion coefficient list without blowing with the blower, c2Indicating that a second odor concentration, k, at a second position is preset before blowing using the blower1The influence factor of time change caused by concentration diffusion after blowing by a fan is shown, and the value range is (0.5, 0.9), c1Indicating the initial odor concentration of the coated surface before blowing by the blower, L indicating the actual distance between the first and second preset positions, L1Representing a standard distance between a first preset position and the second preset position;
and controlling the fan to work for T duration according to the current power.
In this example, the standard temperature is 25 ℃, the corresponding humidity representative value is 0.25, the standard humidity is 26.1hPa, and the corresponding temperature representative value is 0.261;
in this example, if the current humidity is 50hPa and the current temperature is 27 ℃, the odor diffusion coefficient of the coated surface at the current humidity and the current temperature is 2.46.
In this embodiment, the smaller the value of the influence factor of K1, the greater the influence degree of the corresponding T.
The working principle and the beneficial effects of the technical scheme are as follows: the process quality control method of the water-based home appliance color steel primer coating has the advantages that the paint has some pungent odor, so certain odor can be remained on the home appliance passing through the primer coating to influence the use of a user, the time length of the fan in the blowing work is calculated according to a formula in the process of cooling the dried coating surface and then diffusing the odor, the odor of the paint can be effectively removed, the purpose of saving resources is achieved, and convenience is brought to the user.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A process quality control method of water-based home appliance color steel primer coating is characterized by comprising the following steps: the method specifically comprises the following steps:
s110, adding a proper amount of deionized water into the water-based paint for dilution;
s120, fully shaking or uniformly stirring the water-based paint, wherein the water-based paint is mixed according to the mass ratio: 1, deionized water: (0-5%);
s130, fully shaking or uniformly stirring the water-based paint, and filtering the water-based paint by using a 300-mesh filter screen;
s140, scraping with a wire bar scraper, raw paint or scraping after 0-5% deionized water is added for dilution during laboratory coating, and controlling the viscosity of the water-based paint to be 4 cups/35-60 seconds if the water-based paint is coated on the line;
s150, the temperature of the drying wire body is 180-350 ℃, the plate temperature is 216-232 ℃, and the drying time is 20-35 seconds.
2. The process quality control method of the water-based household appliance color steel primer coating according to claim 1, characterized in that: before the paint is used, the surface to be coated is cleaned by using an oil removal agent or a cleaning agent, and wax, oil stains and dust impurities on the surface to be coated are removed.
3. The process quality control method of the water-based household appliance color steel primer coating according to claim 1, characterized in that: the coating is constructed by adopting a roller coating method when the coating is on line, proper water is added for diluting, excessive water is not added, water is used for diluting, acid bias is avoided, the principle of a small amount of times of dilution is followed, and the roller coating oil output linear speed when the coating is on line is as follows: 60-100 m/min.
4. The process quality control method of the water-based household appliance color steel primer coating according to claim 1, characterized in that: the tools and containers using the water-based paint should be of a material that does not react with water or have a suitable internal coating treatment, and should be applied with strict exclusion of mixing with other paints and organic solvents to prevent deterioration.
5. The process quality control method of the water-based household appliance color steel primer coating according to claim 1, characterized in that: the unsealed paint is used up in 8 hours as far as possible, the residual paint is stored separately, the pH value is maintained to be 7.0-8.0 when the paint is used again, and a test is firstly carried out when the water-based paint is recoated to prevent the interlayer adhesion loss.
6. The process quality control method of water-based household electrical appliance color steel primer coating according to claim 1, characterized in that the theoretical coating rate is 390 square meters per square meter per kilogram, and the actual coating rate depends on the substrate surface condition.
7. The process quality control method of the water-based household appliance color steel primer coating according to claim 1, characterized in that: and each coating and the final coating need to be subjected to dry film thickness detection by using an electronic dry film thickness meter, and when the film thickness is insufficient, the coating needs to be supplemented to the specified dry film thickness, wherein the dry film thickness is 5-8 mu m, and the wet film thickness is 10-15 mu m.
8. The process quality control method of the water-based household appliance color steel primer coating according to claim 1, characterized in that: the temperature range of the plate temperature in 30 seconds is 216-224 ℃, the temperature range of the plate temperature in 25 seconds is 224-232 ℃, the temperature range of the furnace temperature in 30 seconds is 180-350 ℃, and the temperature range of the furnace temperature in 25 seconds is 180-350 ℃.
9. The process quality control method of the water-based household appliance color steel primer coating according to claim 7, characterized in that: before each way coating and final coating must carry out the detection of dry film thickness with electronic type dry film thickness meter, still include:
collecting a first image of a coating surface;
inputting the first image into a first quadrant of a preset coordinate system, and respectively acquiring a pixel coordinate corresponding to each pixel point;
respectively acquiring the color corresponding to each pixel point on the first image;
counting the paint colors acquired from the first image;
respectively establishing corresponding color layers according to different paint colors, acquiring pixel coordinates corresponding to pixel points with the same paint color, inputting the pixel coordinates into the corresponding color layers, and drawing corresponding color patterns;
carrying out pixel overlapping degree detection on each color pattern and each historical image in the historical image set respectively, extracting the overlapping part of each color pattern and the corresponding historical image to form a first pattern contour, and forming a pattern set according to all the first pattern contours;
dividing the first image into a preset number of image rows, respectively counting pattern outlines corresponding to each image row, marking and displaying the image rows on the second quadrant, and determining the number of complete patterns and the number of incomplete patterns in the first image according to a marking display result and a pattern set;
when the incomplete pattern number is 0, judging whether the finished pattern number is equal to a preset number or not;
if not, generating quantity error information, and transmitting the quantity error information to a preset terminal for displaying;
and otherwise, generating pattern incomplete information, and transmitting the pattern incomplete information to the preset terminal for displaying.
10. The process quality control method of the water-based household appliance color steel primer coating according to claim 8, characterized in that: when the first image conforms to the history, the method comprises the following steps:
irradiating the coating surface by using a preset first light;
acquiring a refraction signal in a first incident direction in which the preset first light irradiates the coating surface;
dividing the refraction signal into an interference waveform and a detection waveform based on the first incidence direction;
acquiring a plurality of detection peak values of the detection waveform, and extracting a maximum peak value from the detection peak values;
obtaining a plurality of interference peak values of the interference waveform;
obtaining the current thickness of the coating surface in a preset thickness-ratio list according to the ratio of the maximum peak value to the average value of the plurality of interference peak values, and judging whether the current thickness of the coating surface meets the coating standard or not;
if not, marking a plurality of detection points on the coating surface by using an equal spacing method based on the area of the coating surface;
irradiating the coating surface by using preset second light and respectively acquiring an interference spectrum corresponding to each detection point;
respectively acquiring the spectrum phase difference between each detection point and an adjacent detection point, and establishing an interference phase matrix by taking the interference spectrum and the spectrum phase difference as element coefficients;
respectively obtaining the dispersion degree of each row element coefficient on the interference phase matrix, and extracting the row elements to be detected with the dispersion degree higher than the preset dispersion degree;
respectively drawing the spectral direction corresponding to each element to be detected, and eliminating interference spectra with consistent spectral directions to obtain defect elements;
and acquiring the position corresponding to each defect element on the interference phase matrix, generating a thickness adjusting area, and transmitting the thickness adjusting area to a preset terminal for displaying.
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| CN109251613A (en) * | 2018-08-09 | 2019-01-22 | 深圳华美板材有限公司 | A kind of aqueous PCM steel plate and its manufacturing process |
| CN111954885A (en) * | 2017-12-06 | 2020-11-17 | 艾仕得涂料系统知识产权有限责任公司 | System and method for matching color and appearance of target coating |
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|---|---|---|---|---|
| EP1467177A1 (en) * | 2003-04-09 | 2004-10-13 | Mitsubishi Chemical Engineering Corporation | Method and apparatus for measuring thicknesses of layers of multilayer thin film |
| CN105300326A (en) * | 2015-11-30 | 2016-02-03 | 东北大学 | Method and device for quantitative determination of paint surface flatness |
| CN111954885A (en) * | 2017-12-06 | 2020-11-17 | 艾仕得涂料系统知识产权有限责任公司 | System and method for matching color and appearance of target coating |
| CN109251613A (en) * | 2018-08-09 | 2019-01-22 | 深圳华美板材有限公司 | A kind of aqueous PCM steel plate and its manufacturing process |
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