CN110624806A - Airplane spraying method - Google Patents
Airplane spraying method Download PDFInfo
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- CN110624806A CN110624806A CN201910911184.XA CN201910911184A CN110624806A CN 110624806 A CN110624806 A CN 110624806A CN 201910911184 A CN201910911184 A CN 201910911184A CN 110624806 A CN110624806 A CN 110624806A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
- B05D7/26—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials synthetic lacquers or varnishes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
- B05D7/584—No clear coat specified at least some layers being let to dry, at least partially, before applying the next layer
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- C—CHEMISTRY; METALLURGY
- 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
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/34—Condensation polymers of aldehydes or ketones with monomers covered by at least two of the groups C09D161/04, C09D161/18 and C09D161/20
-
- C—CHEMISTRY; METALLURGY
- 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
- 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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- C—CHEMISTRY; METALLURGY
- 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
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2451/00—Type of carrier, type of coating (Multilayers)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2602/00—Organic fillers
Abstract
The invention provides an aircraft spraying method, which is used for spraying an aircraft outer skin through a pretreatment process, primer treatment and finish paint and varnish construction, wherein the primer is prepared from the following raw materials in parts by weight: 25-40 parts of strontium chromate, 2-11 parts of organophilic clay, 10-25 parts of n-butyl alcohol, 1-10 parts of benzyl alcohol, 1-10 parts of a xylene isomer mixture, 2-15 parts of a polymer of formaldehyde, 1, 3-xylylenediamine and phenol, 1-9 parts of 1, 3-xylylenediamine and 0.1-1 part of ethylbenzene; the method is characterized in that the method combines the specific operation steps of pretreatment process, finish paint and varnish construction and the like to spray the outer skin of the airplane, prevents the outer skin of the airplane from being damaged by high-altitude temperature instability and high-intensity ultraviolet radiation in the flying process, can be better suitable for the current increasingly high-standard flying conditions, and improves the flying safety.
Description
Technical Field
The invention relates to the field of paint spraying, in particular to an airplane spraying method.
Background
The speed of the airplane flying in the air can exceed 1km/s, the friction force borne by the high-speed motion of an object has great influence on the outer skin of the airplane, the ultraviolet light in the air is strong, the rain erosion is serious, the phenomena of paint layer sagging, orange peel, wrinkling, unstable color difference and the like easily occur in the existing airplane paint under the condition of unstable temperature and humidity, and particularly, when the paint is sprayed in a layered mode, the phenomenon of uneven paint and the like is easily caused due to the fact that the paint is dry at high temperature.
Disclosure of Invention
In view of the above, the present invention provides an aircraft spraying method to solve the above problems.
The technical scheme of the invention is realized as follows: an aircraft spray coating method comprising the steps of:
s1, preprocessing:
cleaning the surface of the external skin by using a cleaning solvent or carrying out steam degreasing or emulsion cleaning or manual cleaning or alkaline cleaning agent, and carrying out primer treatment 5-10 h after cleaning treatment; the cleaning solvent is a boeing specification BAC5750, the steam degreasing is a boeing specification BAC5408, the cleaning emulsion is a boeing specification BAC5763, and the alkaline detergent is a boeing specification BAC 5749;
s2, primer treatment:
the primer comprises the following raw materials in parts by weight: 25-40 parts of strontium chromate, 2-11 parts of organophilic clay, 10-25 parts of n-butyl alcohol, 1-10 parts of benzyl alcohol, 1-10 parts of a xylene isomer mixture, 2-15 parts of a polymer of formaldehyde, 1, 3-xylylenediamine and phenol, 1-9 parts of 1, 3-xylylenediamine and 0.1-1 part of ethylbenzene;
before use, the primer is stored for at least 24 hours at 18-35 ℃, curing agent is added at the speed of 13-18L/s while the primer is continuously stirred, then diluent and leveling agent are immediately added at the speed of 12-15L/s, and the mixture is mixed for 25-40 min; spraying a primer at the ambient air temperature of 18-35 ℃ and the relative humidity of less than 70%, wherein the thickness of a film coated with the primer is 15-30 microns; the diluent is prepared from the following components in a mass ratio of 1-3: 1-5: 2.3-4 of amyl acetate, diethylene glycol-diethyl ether and urea-formaldehyde melamine resin, wherein the mass ratio of the leveling agent is 2-3: 1-4 polyacrylic acid and acrylic ester;
s3, construction of a finish paint and a varnish:
1) spraying a first layer of finish within 2-72 hours after spraying the primer, drying at 13-35 ℃ for 120-180 min, and spraying a second layer of finish after 15-120 hours, wherein the thickness of a dry film of the finish is 30-50 microns;
2) and (3) coating a layer of varnish after the finish paint, wherein the thickness of the varnish is 25-30 micrometers, and then coating a layer of cross coating to achieve the total dry film thickness of 50-70 millimeters.
Compared with the prior art, the invention has the beneficial effects that: (1) according to the aircraft spraying method, the outer surface of the aircraft skin is sprayed through the pretreatment process, the primer treatment and the finish and varnish construction, the primer material is scientifically proportioned, and the sprayed aircraft outer skin is smooth and free of sagging phenomenon after being cured for 3 hours in combination with the finish and varnish construction;
(2) the primer material is added with the curing agent and the diluent at a proper temperature and stirred, the stirring speed is controlled, the ductility and the stability of the primer material are fully improved under the action of the leveling agent, a foundation of a coating is established for the construction of the next finish paint and varnish, the thickness and the drying time of each layer of dry film are controlled when the finish paint and the varnish are sprayed, and the phenomenon of uneven spraying caused by improper time is prevented;
(3) the spraying temperature and time are adjusted, the adding speed of the curing agent and the diluent and the mass ratio of the diluent and the flatting agent are controlled, the effect of the aircraft exterior skin sprayed by combining the proportion of the primer and a reasonable operation means is better, the test spraying viscosity is 16.1-20.0 s after initial 15min, the surface is flat and smooth and has no sagging phenomenon, the test spraying viscosity is 18.2-21.3 s after curing for 3h, the surface is flat and smooth and has no sagging phenomenon, and the proportion of the primer and the mixing ratio of each component are selected, so that the spraying method disclosed by the invention can be used for spraying the aircraft exterior skin in the service life, and the phenomena of orange peel, sagging, uneven color and the like are avoided.
Detailed Description
In order to better understand the technical content of the invention, specific examples are provided below to further illustrate the invention.
The experimental methods used in the examples of the present invention are all conventional methods unless otherwise specified.
The materials, reagents and the like used in the examples of the present invention can be obtained commercially without specific description.
Example 1
An aircraft spray coating method comprising the steps of:
s1, preprocessing:
cleaning the surface of the external skin by using a cleaning solvent or carrying out steam degreasing or cleaning emulsion or manually cleaning or carrying out alkaline cleaner, and carrying out primer treatment 7 hours after the cleaning treatment; the cleaning solvent is a boeing specification BAC5750, the steam degreasing is a boeing specification BAC5408, the cleaning emulsion is a boeing specification BAC5763, and the alkaline detergent is a boeing specification BAC 5749;
s2, primer treatment:
the primer comprises the following raw materials in parts by weight: 25 parts of strontium chromate, 2 parts of organophilic clay, 10 parts of n-butanol, 1 part of benzyl alcohol, 1 part of a xylene isomer mixture, 2 parts of a polymer of formaldehyde, 1, 3-xylylenediamine and phenol, 1 part of 1, 3-xylylenediamine and 0.1 part of ethylbenzene;
storing the primer at 27 ℃ for 30 hours before use, adding a curing agent at the speed of 15L/s while continuously stirring the primer, immediately adding a diluent and a leveling agent at the speed of 14L/s, mixing for 33min, spraying the primer at the ambient air temperature of 27 ℃ and the relative humidity of 50%, wherein the thickness of a film for coating the primer is 18 micrometers, the spraying coating is overlapped by 50%, and spraying a finish coating within 35 hours; the diluent is prepared from the following components in a mass ratio of 2: 3: 3 amyl acetate, diethylene glycol-ethyl ether, urea-formaldehyde melamine resin; the mass ratio of the leveling agent is 2.5: 3 polyacrylic acid, acrylic acid ester;
s3, construction of a finish paint and a varnish:
1) spraying a first layer of finish within 35 hours after spraying the primer, drying at 25 ℃ for 150min until the thickness of a dry film of the finish is 40 microns, and spraying a second layer of finish after 50 hours;
2) after the above-mentioned top coat, a layer of varnish was applied to a thickness of 28 μm, followed by a cross-coat to a total dry film thickness of 60 mm.
Example 2
An aircraft spray coating method comprising the steps of:
s1, preprocessing:
cleaning the surface of the external skin by using a cleaning solvent or carrying out steam degreasing or cleaning emulsion or manually cleaning or carrying out alkaline cleaner, and carrying out primer treatment 7 hours after the cleaning treatment; the cleaning solvent is a boeing specification BAC5750, the steam degreasing is a boeing specification BAC5408, the cleaning emulsion is a boeing specification BAC5763, and the alkaline detergent is a boeing specification BAC 5749;
s2, primer treatment:
the primer comprises the following raw materials in parts by weight: 40 parts of strontium chromate, 11 parts of organophilic clay, 25 parts of n-butanol, 10 parts of benzyl alcohol, 10 parts of a xylene isomer mixture, 15 parts of a polymer of formaldehyde, 1, 3-xylylenediamine and phenol, 9 parts of 1, 3-xylylenediamine and 1 part of ethylbenzene;
storing the primer at 27 ℃ for 30 hours before use, adding a curing agent at the speed of 15L/s while continuously stirring the primer, immediately adding a diluent and a leveling agent at the speed of 14L/s, mixing for 33min, spraying the primer at the ambient air temperature of 27 ℃ and the relative humidity of 50%, wherein the thickness of a film for coating the primer is 18 micrometers, the spraying coating is overlapped by 50%, and spraying a finish coating within 35 hours; the diluent is prepared from the following components in a mass ratio of 2: 3: 3 amyl acetate, diethylene glycol-ethyl ether, urea-formaldehyde melamine resin; the mass ratio of the leveling agent is 2.5: 3 polyacrylic acid, acrylic acid ester;
s3, construction of a finish paint and a varnish:
2) spraying a first layer of finish within 35 hours after spraying the primer, drying at 25 ℃ for 150min until the thickness of a dry film of the finish is 40 microns, and spraying a second layer of finish after 50 hours;
2) after the above-mentioned top coat, a layer of varnish was applied to a thickness of 28 μm, followed by a cross-coat to a total dry film thickness of 60 mm.
Example 3
An aircraft spray coating method comprising the steps of:
s1, preprocessing:
cleaning the surface of the external skin by using a cleaning solvent or carrying out steam degreasing or cleaning emulsion or manually cleaning or carrying out alkaline cleaner, and carrying out primer treatment 7 hours after the cleaning treatment; the cleaning solvent is a boeing specification BAC5750, the steam degreasing is a boeing specification BAC5408, the cleaning emulsion is a boeing specification BAC5763, and the alkaline detergent is a boeing specification BAC 5749;
s2, primer treatment:
the primer comprises the following raw materials in parts by weight: 33 parts of strontium chromate, 4.5 parts of organophilic clay, 17 parts of n-butanol, 5 parts of benzyl alcohol, 5.5 parts of a xylene isomer mixture, 7 parts of a polymer of formaldehyde, 1, 3-xylylenediamine and phenol, 4 parts of 1, 3-xylylenediamine and 0.6 part of ethylbenzene;
storing the primer at 27 ℃ for 30 hours before use, adding a curing agent at the speed of 15L/s while continuously stirring the primer, immediately adding a diluent and a leveling agent at the speed of 14L/s, mixing for 33min, spraying the primer at the ambient air temperature of 27 ℃ and the relative humidity of 50%, wherein the thickness of a film for coating the primer is 18 micrometers, the spraying coating is overlapped by 50%, and spraying a finish coating within 35 hours; the diluent is prepared from the following components in a mass ratio of 2: 3: 3 amyl acetate, diethylene glycol-ethyl ether, urea-formaldehyde melamine resin; the mass ratio of the leveling agent is 2.5: 3 polyacrylic acid, acrylic acid ester;
s3, construction of a finish paint and a varnish:
3) spraying a first layer of finish within 35 hours after spraying the primer, drying at 25 ℃ for 150min until the thickness of a dry film of the finish is 40 microns, and spraying a second layer of finish after 50 hours;
2) after the above-mentioned top coat, a layer of varnish was applied to a thickness of 28 μm, followed by a cross-coat to a total dry film thickness of 60 mm.
Example 4
An aircraft spray coating method comprising the steps of:
s1, preprocessing:
cleaning the surface of the external skin by using a cleaning solvent or carrying out steam degreasing or cleaning emulsion or manually cleaning or carrying out alkaline cleaner, and carrying out primer treatment 5 hours after the cleaning treatment; the cleaning solvent is a boeing specification BAC5750, the steam degreasing is a boeing specification BAC5408, the cleaning emulsion is a boeing specification BAC5763, and the alkaline detergent is a boeing specification BAC 5749;
s2, primer treatment:
the primer comprises the following raw materials in parts by weight: 33 parts of strontium chromate, 4.5 parts of organophilic clay, 17 parts of n-butanol, 5 parts of benzyl alcohol, 5.5 parts of a xylene isomer mixture, 7 parts of a polymer of formaldehyde, 1, 3-xylylenediamine and phenol, 4 parts of 1, 3-xylylenediamine and 0.6 part of ethylbenzene;
storing the primer at 18 ℃ for 24 hours before use, adding a curing agent at the speed of 13L/s while continuously stirring the primer, immediately adding a diluent and a leveling agent at the speed of 12L/s, and mixing for 25 min; spraying a primer at the ambient air temperature of 18 ℃ and the relative humidity of 50%, wherein the thickness of a film coated with the primer is 15 microns; the diluent is prepared from the following components in a mass ratio of 1: 1: 2.3 of amyl acetate, diethylene glycol-diethyl ether and urea-formaldehyde melamine resin, wherein the mass ratio of the leveling agent is 2: 1 polyacrylic acid, acrylic acid ester;
s3, construction of a finish paint and a varnish:
1) spraying a first layer of finish within 2 hours after spraying the primer, drying at 13 ℃ for 120min until the thickness of a dry film of the finish is 30-micrometers, and spraying a second layer of finish after 15 hours;
2) after the finish, a layer of varnish was applied to a thickness of 25 μm, followed by a cross-coat to a total dry film thickness of 50 mm.
Example 5
S1, preprocessing:
cleaning the surface of the outer skin of the airplane by using a cleaning solvent or carrying out steam degreasing or cleaning emulsion or manually cleaning or carrying out alkaline cleaner, and carrying out primer treatment 10 hours after the cleaning treatment; the cleaning solvent is a boeing specification BAC5750, the steam degreasing is a boeing specification BAC5408, the cleaning emulsion is a boeing specification BAC5763, and the alkaline detergent is a boeing specification BAC 5749;
s2, primer treatment:
the primer comprises the following raw materials in parts by weight: 33 parts of strontium chromate, 4.5 parts of organophilic clay, 17 parts of n-butanol, 5 parts of benzyl alcohol, 5.5 parts of a xylene isomer mixture, 7 parts of a polymer of formaldehyde, 1, 3-xylylenediamine and phenol, 4 parts of 1, 3-xylylenediamine and 0.6 part of ethylbenzene; (ii) a
Storing the primer at 35 ℃ for 35 hours before use, adding a curing agent at the speed of 18L/s while continuously stirring the primer, immediately adding a diluent and a flatting agent at the speed of 15L/s, and mixing for 40 min; spraying a primer at the ambient air temperature of 35 ℃ and the relative humidity of 70 percent, wherein the thickness of a film coated with the primer is 30 microns; the diluent is prepared from the following components in a mass ratio of 3: 5: 4, amyl acetate, diethylene glycol-diethyl ether and urea-formaldehyde melamine resin, wherein the mass ratio of the leveling agent is 3: 4 polyacrylic acid, acrylic acid ester;
s3, construction of a finish paint and a varnish:
1) spraying a first layer of finish within 72 hours after spraying the primer, drying at 35 ℃ for 180min until the thickness of a dry film of the finish is 50 microns, and spraying a second layer of finish after 120 hours;
2) after the above-mentioned top coat, a layer of varnish was applied to a thickness of 30 μm, followed by a further cross-coat to a total dry film thickness of 70 mm.
Example 6
The difference between the embodiment and the embodiment 3 is that the mass ratio of the diluent is 1: 1: 1 amyl acetate, diethylene glycol-ethyl ether, urea-formaldehyde melamine resin.
Example 7
The difference between the embodiment and the embodiment 3 is that the mass ratio of the leveling agent is 1: 5 polyacrylic acid, acrylic acid ester.
Comparative example 1
This comparative example differs from example 3 in the treatment of the primer:
the primer comprises the following raw materials in parts by weight: 20 parts of strontium chromate, 1 part of organophilic clay, 5 parts of n-butanol, 11 parts of benzyl alcohol, 12 parts of a xylene isomer mixture, 1 part of a polymer of formaldehyde, 1, 3-xylylenediamine and phenol, 10 parts of 1, 3-xylylenediamine and 1.2 parts of ethylbenzene.
Comparative example 2
This comparative example differs from example 3 in the treatment of the primer:
storing the primer for 20 hours at 15 ℃, adding a curing agent when the primer is continuously stirred, mixing the primer solution once every 20min without adding a diluent, and adding a primer leveling agent in the mixing process; the primer was sprayed at an ambient air temperature of 15 ℃ and a relative humidity of 80% and the topcoat was sprayed within 80 hours.
Comparative example 3
The comparative example differs from example 3 in the construction of the topcoat and clearcoat:
drying the coating until the dry film thickness is 20 microns, wherein the drying time is 100min, and coating a second coating after 10h of the first coating;
applying a chemical varnish conversion coating
A dry film of 20 microns thickness was first sprayed on and then a cross-coat was applied to achieve a total dry film thickness of 40 mm.
First, performance test
As can be seen from the above table, in examples 1 to 3, the primer materials are scientifically proportioned, the viscosity of the sprayed paint for the exterior of the airplane is 17.1s at 15min and 18.2s after 3h, and the surface is flat and smooth and has no sagging phenomenon; in the embodiments 3-7, the spraying temperature and time are adjusted, the adding speed of the curing agent and the diluent and the thickness of the dry film are controlled, and the comparison shows that the airplane exterior paint sprayed by the primer in the embodiment 3 and a reasonable operation means has the best effect; compared with the comparative examples 1 to 3, the proportion of the primer is extremely important, the viscosity of the external paint sprayed in the proportion outside the range is 22.4s after 3 hours, and the different parameter conditions of the primer spraying treatment, the finish paint and the varnish spraying construction and the like in the examples 2 to 3 have certain influence on the external paint spraying effect, and orange peel and sagging phenomenon occur after 3 hours of curing.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. An aircraft spraying method is characterized in that: the method comprises the following steps:
s1, preprocessing:
cleaning the surface of the outer skin of the airplane by using a cleaning solvent or carrying out steam degreasing or emulsion cleaning or manual cleaning or alkaline cleaning agent, and carrying out primer treatment 5-10 h after cleaning treatment;
s2, primer treatment:
the primer comprises the following raw materials in parts by weight: 25-40 parts of strontium chromate, 2-11 parts of organophilic clay, 10-25 parts of n-butyl alcohol, 1-10 parts of benzyl alcohol, 1-10 parts of a xylene isomer mixture, 2-15 parts of a polymer of formaldehyde, 1, 3-xylylenediamine and phenol, 1-9 parts of 1, 3-xylylenediamine and 0.1-1 part of ethylbenzene;
storing the primer at 18-35 ℃ for at least 24 hours before use, adding a curing agent while continuously stirring the primer, immediately adding a diluent and a leveling agent, and mixing for 25-40 min, wherein the volume ratio of the primer to the curing agent to the diluent to the leveling agent is 13-20: 2-5: 3-8: 1-3; spraying a primer at the ambient air temperature of 18-35 ℃ and the relative humidity of less than 70%;
s3, construction of a finish paint and a varnish:
1) spraying a first layer of finish within 2-72 hours after spraying the primer, drying for 120-180 min, and spraying a second layer of finish after 15-120 hours after the thickness of a dry film of the finish is 30-50 microns;
2) and (3) coating a layer of varnish after the finish paint, wherein the thickness of the varnish is 25-30 micrometers, and then coating a layer of cross coating to achieve the total dry film thickness of 50-70 millimeters.
2. An aircraft spray coating method as claimed in claim 1, wherein: the cleaning solvent is boeing specification BAC5750, the steam degreasing is boeing specification BAC5408, the cleaning emulsion is boeing specification BAC5763, and the alkaline detergent is boeing specification BAC 5749.
3. An aircraft spray coating method as claimed in claim 1, wherein: the diluent is prepared from the following components in a mass ratio of 1-3: 1-5: 2.3-4 of amyl acetate, diethylene glycol-diethyl ether and urea-formaldehyde melamine resin.
4. An aircraft spray coating method as claimed in claim 1, wherein: the mass ratio of the flatting agent is 2-3: 1 to 4 of polyacrylic acid or acrylic ester.
5. An aircraft spray coating method as claimed in claim 1, wherein: the thickness of the film coated with the primer is 15-30 microns.
6. An aircraft spray coating method as claimed in claim 1, wherein: the cross-coat is a horizontal and a vertical coating covering 50% of the surface.
7. An aircraft spray coating method as claimed in claim 1, wherein: in the primer treatment, a curing agent is added at a speed of 13-18L/s.
8. An aircraft spray coating method as claimed in claim 1, wherein: adding a diluent at a rate of 12-15L/s.
9. An aircraft spray coating method as claimed in claim 1, wherein: the temperature of spraying finish paint is 13-35 ℃.
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| CN201910911184.XA CN110624806A (en) | 2019-09-25 | 2019-09-25 | Airplane spraying method |
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| CN201910911184.XA CN110624806A (en) | 2019-09-25 | 2019-09-25 | Airplane spraying method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116475041A (en) * | 2023-02-17 | 2023-07-25 | 日照山太飞机工程股份有限公司 | Airplane gradual-change color spraying method |
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