CN107377335A - The coating process of water paint - Google Patents
The coating process of water paint Download PDFInfo
- Publication number
- CN107377335A CN107377335A CN201710648946.2A CN201710648946A CN107377335A CN 107377335 A CN107377335 A CN 107377335A CN 201710648946 A CN201710648946 A CN 201710648946A CN 107377335 A CN107377335 A CN 107377335A
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- water
- aluminum alloy
- sprayed
- drying condition
- degrees celsius
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Classifications
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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
- 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
-
- 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
- B05D3/02—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 baking
- B05D3/0254—After-treatment
-
- 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
- B05D7/14—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 to metal, e.g. car bodies
- B05D7/16—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 to metal, e.g. car bodies using 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
- 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
- B05D2504/00—Epoxy polymers
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
A kind of coating process of water paint of present invention offer, the process, including：Water-base epoxy priming paint is sprayed to aluminum alloy bodywork to be sprayed, and processing is dried under the first drying condition；Putty is scratched to the aluminum alloy bodywork after drying process, and processing is dried under the second drying condition；Aqueous primer surfacer is sprayed to the aluminum alloy bodywork after drying process, and processing is dried under the 3rd drying condition；Water-borne base coat is sprayed to the aluminum alloy bodywork after drying process, and processing is dried under the 4th drying condition；Water varnish is sprayed to the aluminum alloy bodywork after drying process, and processing is dried under the 5th drying condition.Process provided by the invention, on the premise of the spraying facility of existing solvent based coating application is not changed, the technique that realizes water paint application, it compensate for the vacancy that aluminum alloy bodywork in the market utilizes water paint to carry out application.
Description
Technical field
The present invention relates to coating process technology, more particularly to a kind of coating process of water paint.
Background technology
With the manufacturing fast development of railway transportation equipment, EMU, subway and light rail have generally used
Aluminium alloy extrusions manufactures car body.But because aluminium is active metal, its antiseptic property and decoration performance are all poor, therefore, are
Antiseptic property of enhancing aluminum alloy bodywork itself must carry out coating process with decoration performance, aluminum alloy bodywork.
At present, domestic all EMU, subway and light rail applications use solvent based coating, and use and solvent
The supporting equipment of type coating application, frock, spraying powerhouse etc..For rail vehicle, domestic rail vehicle is newly made and overhauled
The about annual solvent based coating for needing 15000 tons, calculates according to more than 40% solvent, is discharged per annual meeting into air
Organic volatile more than 6000 tons.If using water-based anticorrosive paint, the discharge capacity of organic solvent is only 285 tons or so, can be with
Greatly reduce pollution on the environment.
It is molten as the progress of country, the raising of living standards of the people, the mankind are more and more obvious to environmental protection and the consciousness of health
Formulation coating is high because of VOC (Volatile Organic Compounds, abbreviation VOC) content at last, to people
Body harm is big and is substituted by water paint, but in the market, has no and aluminum alloy bodywork is applied with water paint application
Work process has system, detailed research.
The content of the invention
The present invention provides a kind of coating process of water paint, to realize the water paint application on aluminum alloy bodywork
Technique, it compensate for the vacancy that aluminum alloy bodywork in the market carries out application using water paint.
The invention provides a kind of coating process of water paint, including：
Water-base epoxy priming paint is sprayed to aluminum alloy bodywork to be sprayed, and processing is dried under the first drying condition；
Putty is scratched to the aluminum alloy bodywork after drying process, and processing is dried under the second drying condition；
Aqueous primer surfacer is sprayed to the aluminum alloy bodywork after drying process, and is dried under the 3rd drying condition
Processing；
Water-borne base coat is sprayed to the aluminum alloy bodywork after drying process, and is dried under the 4th drying condition
Processing；
Water varnish is sprayed to the aluminum alloy bodywork after drying process, and place is dried under the 5th drying condition
Reason.
Alternatively, the water-base epoxy priming paint, the aqueous primer surfacer, the water-borne base coat and the water varnish
Spraying operation environment temperature control between 15-30 degrees Celsius, relative humidity control between 10%-70%.
Alternatively, described process, before to aluminum alloy bodywork spraying water-base epoxy priming paint to be sprayed, also wrap
Include：
Grinding process is carried out to the surface of the aluminum alloy bodywork to be sprayed, by the aluminum alloy bodywork to be sprayed
Surface roughness control between 3.2-12.5 microns；
Remove the impurity on the aluminum alloy bodywork surface to be sprayed；
Processing is dried to the aluminum alloy bodywork to be sprayed；
To being protected on the aluminum alloy bodywork to be sprayed without the position of spraying.
Alternatively, deionized water content≤15% in the water-base epoxy priming paint, the viscosity of the water-base epoxy priming paint
Between the 40-60 seconds；
Deionized water content≤15% in the aqueous primer surfacer, the viscosity of the aqueous primer surfacer is between the 30-40 seconds
Between；
Deionized water content≤15% in the water-borne base coat, the viscosity of the water-borne base coat is between the 30-50 seconds
Between；
Deionized water content≤15% in the water varnish, the viscosity of the water-borne base coat is between the 20-35 seconds
Between.
Alternatively, after processing being dried under first drying condition, the water-base epoxy priming paint that is formed it is dry
Film thickness is between 60-100 microns；
After processing is dried under the 3rd drying condition, the thickness of dry film of the aqueous primer surfacer formed between
Between 60-100 microns；
After processing is dried under the 4th drying condition, the thickness of dry film of the water-borne base coat formed between
Between 20-30 microns；
After processing is dried under the 5th drying condition, the thickness of dry film of the water varnish formed between
Between 20-30 microns.
Alternatively, first drying condition is：12 hours are dried between 30-40 degrees Celsius；Or exist successively
3 hours are dried between 50-60 degrees Celsius, then in 23 degrees Celsius of dry 12 hours；
Second drying condition is：In 60 degrees Celsius of dry 1 hours；Or dried 16 hours at 20 degrees Celsius；
3rd drying condition is：Dried 12 hours between 30-40 degrees Celsius；Or successively at 20-30 degrees Celsius
Between dry 1 hour, under 60 degrees celsius dry 3 hours, under 23 degrees celsius dry 12 hours；
4th drying condition is：In 40 degrees Celsius of dry half an hours；Or dry one at 20-30 degrees Celsius
To one and a half hours；
5th drying condition is：In 60 degrees Celsius of dry 2 hours；It is or 16 small in 20-30 degrees Celsius of drying
When.
Alternatively, described process, after processing is dried under the first drying condition, in addition to：
To the thick slurry paint of chassis part spraying water-base epoxy of the aluminum alloy bodywork, and done under the 6th drying condition
Dry processing.
Alternatively, the temperature control of the spraying operation environment of the thick slurry paint of the water-base epoxy is between 15-30 degrees Celsius, phase
To humid control between 10%-70%.
Alternatively, after processing being dried under the 6th drying condition, the water-base epoxy thickness formed starches paint
Thickness of dry film is more than 150 microns.
Alternatively, the 6th drying condition is：12 hours are dried under 30-40 degrees celsius；Or exist successively
3 hours of 50-60 degrees Celsius of drying, in 23 degrees Celsius of dry 12 hours.
The present invention provides a kind of coating process of water paint, is not changing the spray of existing solvent based coating application
On the premise of applying facility, only by changing operating environment, spraying method, drying condition and other construction parameters of spraying, just
The technique for realizing water paint application.Solvent based coating is substituted using water paint, petroleum resources can be efficiently reduced
Consumption, while decreases the discharge capacity of the harmful substances such as VOC, reduce enterprise safety and environmental protection into
This, it is even more important that create a more environmentally-friendly and healthy operating environment for painting workshop Manufacturing Worker；In addition,
The technique for not changing the application that water paint is realized under conditions of the spraying facility of existing solvent based coating application, effectively
Reduce the cost of more exchange device and job shop transformation；Meanwhile by using water paint, effectively eliminate originally molten
Inflammable, explosive danger caused by formulation coating and the inconvenience in storing and work progress, reduction storage and transport into
This.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the flow chart of the coating process for the water paint that the embodiment of the present invention one provides；
Fig. 2 is the water-base epoxy basecoat paint process schematic in Fig. 1；
Fig. 3 is the aqueous primer surfacer spraying process schematic diagram in Fig. 1；
Fig. 4 is the water varnish spraying process schematic diagram in Fig. 1；
Fig. 5 is the flow chart of the coating process for the water paint that the embodiment of the present invention two provides.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 1 is the flow chart of the coating process for the water paint that the embodiment of the present invention one provides, as shown in figure 1, this
The process of embodiment includes：
Step 101, water-base epoxy priming paint is sprayed to aluminum alloy bodywork to be sprayed, and done under the first drying condition
Dry processing.
Specifically, water-base epoxy priming paint is equably sprayed on by corresponding spraying equipment by aluminum alloy bodywork to be sprayed
On, and the aluminum alloy bodywork after spraying is placed under the first drying condition processing is dried.
Wherein, the first drying condition is：Aluminum alloy bodywork after spraying is placed in the environment between 30-40 degrees Celsius
Dry 12 hours；Or be first placed at successively in the environment between 50-60 degrees Celsius and dry 3 hours, then to be placed in 23 Celsius
12 hours are dried in the environment of degree.First drying condition can ensure that water-base epoxy priming paint is slowly dried, after drying
There is no orange peel and meet color and glossiness etc..
During specific spraying operation, if the temperature of spraying operation environment is too high, water-base epoxy priming paint is formed
Lacquer painting gloss will be very poor, and the lacquer painting that can make seems rough, more coarse, produces orange peel phenomenon, and paint film color is inclined
It is shallow partially white；If the temperature of spraying operation environment is too low, paint sagging, corner fat edges, drop paint, paint film color obfuscation can be produced
Black.It is alternatively possible to the temperature of spraying operation environment is adjusted by central air-conditioning.And in spraying operation environment
Relative humidity influences the evaporation rate of solvent, and then influences coating levelling and sagging performance.If spraying operation environment is relative
Humidity is too high, and condensation, loss of gloss occurs in lacquer painting, and pit or pin hole can be produced when serious；If spraying operation environment is relatively wet
Spend low, then can cause orange peel phenomenon and lacquer painting loss of gloss.Alternatively, can be in supply air system to ensure suitable relative humidity
It is middle that the relative humidity of spraying operation environment is adjusted using humidification and dehydrating unit.Therefore, carried out to aluminum alloy bodywork
During the spraying of water-base epoxy priming paint, by the temperature control of its painting environments between 15-30 degrees Celsius, relative humidity control exists
Between 10%-70%.
It is worth explanatorily, in the present embodiment, before being sprayed to aluminum alloy bodywork, it is necessary in advance to water-base epoxy
Priming paint is allocated.It is possible, firstly, to be stirred by Pneumatic stirring machine to water-base epoxy priming paint host, mixing time control exists
Between 1-5 minutes.Then, according to the specific requirement in water-base epoxy priming paint host operation instructions in water-base epoxy priming paint host
Middle addition curing agent, to reach the curing agent ratio requirement in operation instructions.Curing agent need to gradually add during stirring
Enter, continue to stir to well mixed after addition.
Wherein, curing agent also known as curing agent, it is a kind of material or mixture promoted or control curing reaction, in coating work
The curing agent commonly used in industry has curing agent for epoxy resin coating, and principal item has amine curing agent, acid anhydride type curing agent and containing work
The synthetic resin curing agent of property group, is additive essential in water paint, can make to be sprayed on aluminum alloy bodywork
Water-base epoxy priming paint rapid draing, further, it is also possible to increase the adhesive force of paint, increase lacquer painting hardness and improve paint chemistry
Stability and antiseptic power.
Alternatively, after water-base epoxy priming paint host and curing agent are stirred, according to the actual conditions of mixture
Appropriate deionized water is added, deionized water need to be gradually added into during stirring, continue to stir 1-10 minutes extremely after addition
Paint is overall well mixed.Need to ensure in allocation process, the deionization in water-base epoxy priming paint after the completion of allotment
Water content≤15%, and the viscosity of water-base epoxy priming paint will be between the 40-60 seconds.Wherein, water-base epoxy priming paint is glued
Degree measurement is by by a certain amount of sample, being glued at the specified temperature from Sai Shi using saybolt viscosity, i.e. Saybolt viscosity
Number of seconds needed for 60 milliliters of degree meter outflow, with " second " unit.
In the present embodiment, the viscosity of water-base epoxy priming paint can be measured by DIN flow cups, specific measurement step
It is rapid as follows：
Suitable solvent is first selected by the inwall wiped clean of DIN viscosity cups using preceding, it is especially desirable to it is to be noted that clear
Cup aperture is washed, can be with soft spill into rope form, pull carries out the cleaning of aperture repeatedly in tap hole, then dries in atmosphere
Or dried up with cold wind, the raffinate for being not allow for past measurement is adhered in cup or flow export；Water-base epoxy priming paint test solution is stirred
Uniformly, filtered in screen cloth, and make test solution and flow cup temperature adjustment to specified measurement temperature；Adjustment flow cup support causes
Flow cup is horizontal positioned；Test solution is injected in flow cup, while finger is blocked with baffle plate and blocks tap hole, after filling with a metal or
Glass plate is struck off on cup, and unnecessary sample is scraped in flow cup edge groove, and puts undertaking cup well below flow cup；
Push baffle plate open, test solution is vertically flowed out, while start stopwatch；When there is first breakpoint, stop timing, now the delivery time
Number of seconds be water-base epoxy priming paint to be measured viscosity number；Repeat above operational measure three times, average as last water-based ring
The viscosity number of oxygen priming paint.
After the completion of being allocated to water-base epoxy priming paint, the water-base epoxy priming paint that the allotment is completed can be used to aluminium alloy car
Body is sprayed.
Specifically, high pressure airless spray equipment can be selected to carry out the spraying of water-base epoxy priming paint to aluminum alloy bodywork.High pressure
Airless spraying is a more advanced spraying method, and it uses booster pump that coating is increased into high pressure, is sprayed, made by very thin spray orifice
Coating forms fan-shaped vaporific.When being sprayed to the larger aluminum alloy bodywork of surface area ratio, thicker coating can be sprayed, and
Due to not being mixed into air in coating, and equipment has higher coating transmission efficiency and production efficiency, so as to be closed in aluminium
Golden car body surface forms the coating of densification.In use, deployed water-base epoxy priming paint first can be added to high-pressure airless spray
In painting machine, then the setting of parameter is carried out to high pressure airless spray equipment, wherein the force feed ratio of flush coater is arranged into 40:1 or 48:
1, spray pressure is arranged to 0.4-0.6MPa, and carries out spraying operation from the rifle mouth of 617 models or 619 models.It is worth explanation
, by taking the rifle mouth of 617 models as an example, mist breadth degree is 60cm about at 30cm before 6 expression rifle mouths, and 17 represent that rifle mouths are per minute
Flow be 1.7L/min.
Alternatively, before aluminum alloy bodywork is sprayed, also need first to clean the corollary equipment of spraying, can be with
First cleaned using water, then cleaned with waterborne cleaning agent successively, finally cleaned again with water.Wherein, selected in cleaning process
Waterborne cleaning agent contains very effective interfacial agent, penetrates into the trickle gap of any difficult cleaning, and spot is quick
Stripping cleans out, also, with superpower cleaning permeability, low bubble performance, will not be formed in spraying equipment after cleaning
Residual.
Illustrated below by taking once specific spraying process as an example.Fig. 2 is the water-base epoxy basecoat paint process in Fig. 1
Schematic diagram, as shown in Fig. 2 carry out the spraying of water-base epoxy priming paint in this step to aluminum alloy bodywork using horizontal spraying method,
Sprayed i.e. from one end of car body 1 to the other end, a completion, spraying process is continuous, without time interval, wherein rifle mouth and aluminium alloy
Spray distance between car body is 150-300mm.In addition, the usage time of water-base epoxy priming paint must not exceed being applicable for coating
Phase, coating applicable period refer to that mixed coating allows the time placed, and more than this time limit, coating will be unable to use.
After the spraying that water-base epoxy priming paint is carried out to aluminum alloy bodywork, in the wet-film thickness that aluminum alloy bodywork surface is formed
Aluminum alloy bodywork after spraying is placed under the first drying condition after processing is dried by control between 120-200 microns,
The thickness of dry film of the water-base epoxy priming paint formed is controlled between 60-100 microns.Wherein it is possible to pass through wet film thickness gauge, example
Rule or comb rule are such as taken turns, forming water-base epoxy priming paint wet-film thickness to aluminum alloy bodywork surface spraying measures, and is spraying
Cheng Houying measures wet-film thickness as early as possible, to avoid the wet film thinning phenomenon because caused by volatilizing water.It is complete in water-base epoxy priming paint
After drying, the thickness of dry film of the water-base epoxy priming paint formed can be measured according to standard GB/T 1764-89 (79),
Only per pass film all reaches defined thickness of dry film, finally can be only achieved overall total film thickness requirement, wherein, in national standard
Defining can be by lever-type micrometer or magnetic thickness tester.
Step 102, putty is scratched to the aluminum alloy bodywork after drying process, and place is dried under the second drying condition
Reason.
Specifically, it is right after aluminum alloy bodywork forms the water-base epoxy primer dry films of qualified thickness by drying process
Car body scratches putty.Should try one's best it is generally necessary to scratch 1-6 to aluminum alloy bodywork all over putty, during blade coating and avoid generation machete rib and residual
Putty is stayed to fall, to reach the requirement of car body flat appearance no significant defect, moreover, every time interval all over putty blade coating is at least
3 hours, require that putty coating surface obtains diameter≤2mm of numb eye after the completion of blade coating, do not allow larger numb eye occur.Putty
After coating inspection is qualified, also needs aluminum alloy bodywork being placed under the second drying condition processing is dried.
Wherein, the second drying condition is：Aluminum alloy bodywork after blade coating putty is placed in 60 degrees Celsius of environment and done
Dry 1 hour；Or it is placed in 20 degrees Celsius of environment and dries 16 hours.
In the present embodiment, can be scratched from Unsaturated polyester putty.Wherein, Unsaturated polyester putty its be applicable
Putty in metal surface scratches, have can thick paintings, quick-drying, adhesive force it is strong, easily polishing and many advantages, such as do not ftracture.To aluminium
Alloy car body carries out blade coating putty before, it is necessary to be allocated in advance to putty.It can use and say according to Unsaturated polyester putty
Specific requirement addition curing agent in bright book, to reach the curing agent ratio requirement in operation instructions, finally by filler mixing
To color uniformity, wherein, mixing time was controlled between 1-5 minutes.In addition, the usage time of Unsaturated polyester putty is not
The working life of putty must be exceeded, putty working life refers to that mixed putty allows the time placed, more than this time limit, putty
It will be unable to use.
Before blade coating putty is carried out to aluminum alloy bodywork, the position that first can need to scratch putty to aluminum alloy bodywork is entered
Row polishing, and with clean wiper air exercise mill after surface cleaned, then reuse scraper car body surface make up a deficiency and
Fill and lead up.Wherein, mode preferred embodiment of polishing is to carry out manual grinding using P80 sand paper, what deserves to be explained is, P80 sand paper refers to
It is the sand paper that there are 80 sand grains the inside every square centimeter.
Alternatively, after the aluminum alloy bodywork for coating putty to scraping is dried, P80 sand paper can also be used right again
Aluminum alloy bodywork carries out overall polishing so that putty coating is more smooth and uniform, is advantageous to the extension paint of follow-up water paint.
Step 103, aqueous primer surfacer is sprayed to the aluminum alloy bodywork after drying process, and carried out under the 3rd drying condition
Drying process.
Specifically, after aluminum alloy bodywork forms qualified putty coating by drying process, by spraying accordingly
Aluminum alloy bodywork after spraying is placed under the 3rd drying condition and place is dried by equipment to vehicle body coating aqueous primer surfacer
Reason.
Wherein, the 3rd drying condition is：By spray aqueous primer surfacer after aluminum alloy bodywork be placed in 30-40 degrees Celsius it
Between environment in dry 12 hours；Or 1 hour is first dried in the environment between 20-30 degrees Celsius successively, then be placed in
3 hours are dried in 60 degrees Celsius of environment, is finally placed in 23 degrees Celsius of environment and dries 12 hours.
During specific spraying operation, environment temperature and relative humidity not only cause shadow to water-base epoxy priming paint
Ring, also equally aqueous primer surfacer is impacted, the process specifically impacted can be found in above-described embodiment, no longer superfluous herein
State.Therefore, when carrying out the spraying of aqueous primer surfacer to aluminum alloy bodywork, the temperature control of its painting environments is taken the photograph in 15-30
Between family name's degree, relative humidity is controlled between 10%-70%.
It is worth explanatorily, in the present embodiment, it is necessary in advance before aqueous primer surfacer spraying is carried out to aluminum alloy bodywork
Aqueous primer surfacer is allocated.It is possible, firstly, to aqueous primer surfacer host is stirred by Pneumatic stirring machine, mixing time
Control is between 1-5 minutes.Then, according to the specific requirement in aqueous primer surfacer host operation instructions in aqueous primer surfacer master
Curing agent is added in agent, to reach the curing agent ratio requirement in operation instructions.Curing agent need to be during stirring gradually
Add, continue to stir to well mixed after addition.Wherein, in the curing agent and step 101 that are added in aqueous primer surfacer host
The effect of the curing agent added in water-base epoxy priming paint host is identical, no longer superfluous herein referring specifically to the description in step 101
State.
After aqueous primer surfacer host and curing agent are stirred, added in right amount according to the actual conditions of mixture
Deionized water, deionized water need to be gradually added into during stirring, and it is overall mixed to painting to continue stirring 1-10 minutes after addition
Close uniform.Need to ensure in allocation process, deionized water content≤15% in the aqueous primer surfacer after the completion of allotment,
And the viscosity of aqueous primer surfacer will be between the 30-40 seconds.Wherein, to the Viscosity Measurement Methods and step of aqueous primer surfacer
The Viscosity Measurement Methods of water-based epoxy primer are identical in 101, and referring specifically to the description in step 101, here is omitted.
After the completion of being allocated to aqueous primer surfacer, the aqueous primer surfacer that the allotment can be used to complete enters to aluminum alloy bodywork
Row spraying.
Specifically, mixed air spray coater can be selected to carry out the spraying of aqueous primer surfacer to aluminum alloy bodywork.Mixed air spray coater
Atomizing effect is good, and coating atomized drop is trickle and is evenly distributed, and the dicoration of high quality can be obtained by mixing gas blowout coating method
Coating surface；Further, since the coating pressure used in air-mixed spraying is smaller than high-pressure airless, the coating initial velocity sprayed through nozzle
Airless spraying is significantly less than, the initial velocity of compressed air is greatly reduced so that outside by spray forms an annular air curtain
Constraint, limitation coating cloud flow to surrounding loss, so as to significantly reduce flying upward for loss coating cloud, have effectively saved painting
Material.In use, first deployed aqueous primer surfacer can be added in mixed air spray coater, then parameter is carried out to mixed air spray coater
Setting, wherein the force feed ratio of flush coater is arranged into 30:1, spray pressure is arranged to 0.4-0.6MPa, and selects 615 models
Rifle mouth carry out spraying operation.
Illustrated below by taking once specific spraying process as an example.Fig. 3 is that the aqueous primer surfacer spraying process in Fig. 1 shows
It is intended to, as shown in figure 3, carrying out the spraying of aqueous primer surfacer in this step to aluminum alloy bodywork using the method longitudinally sprayed, i.e.,
Every to spray twice of completion all over all being sprayed from the top of car body 1 to lower section, spraying process is continuous, without time interval.This
Outside, the usage time of aqueous primer surfacer must not exceed the working life of coating, and coating applicable period refers to that mixed coating allows to put
The time put, more than this time limit, coating will be unable to use.
Wherein, each wet-film thickness for being sprayed on the formation of aluminum alloy bodywork surface all over aqueous primer surfacer is controlled in 70-100
Between micron, after the completion of twice of spraying, the aluminum alloy bodywork after spraying is placed under the 3rd drying condition processing is dried, institute
The dry film gross thickness of the aqueous primer surfacer of formation is controlled between 60-100 microns.Wherein, the wet-film thickness of aqueous primer surfacer and
Thickness of dry film measuring method is identical with the wet-film thickness and thickness of dry film measuring method of the water-base epoxy priming paint in step 101, tool
Body is referring to the description in step 101, and here is omitted.
Alternatively, before aqueous primer surfacer spraying is carried out to aluminum alloy bodywork, also need first to enter the corollary equipment of spraying
Row cleaning, first can be cleaned using water successively, then be cleaned with waterborne cleaning agent, finally be cleaned again with water.Wherein, cleaned
The waterborne cleaning agent selected in journey contains very effective interfacial agent, penetrates into the trickle gap of any difficult cleaning,
Spot is quickly peeled off and cleaned out, also, with superpower cleaning permeability, low bubble performance, in spraying equipment after cleaning
In will not form residual.
Step 104, water-borne base coat is sprayed to the aluminum alloy bodywork after drying process, and carried out under the 4th drying condition
Drying process.
Specifically, after aluminum alloy bodywork forms the aqueous primer surfacer dry film of qualified thickness by drying process, pass through
Corresponding spraying equipment is placed under the 4th drying condition to vehicle body coating water-borne base coat, and by the aluminum alloy bodywork after spraying
Processing is dried.
Wherein, the 4th drying condition is：Aluminum alloy bodywork after spraying water-borne base coat is placed in 40 degrees Celsius of dryings
Half an hour；Or it is placed in 20-30 degrees Celsius of drying one to one and a half hours.
Alternatively, environment temperature and relative humidity not only impact to water-base epoxy priming paint, also equally in water-based
Japanning impacts, and the process specifically impacted can be found in above-described embodiment, and here is omitted.Therefore, to aluminium alloy
When car body carries out the spraying of water-borne base coat, by the temperature control of its painting environments between 15-30 degrees Celsius, relative humidity control
System is between 10%-70%.
It is worth explanatorily, in the present embodiment, it is necessary in advance before water-borne base coat spraying is carried out to aluminum alloy bodywork
Water-borne base coat is allocated.It is possible, firstly, to water-borne base coat host is stirred by Pneumatic stirring machine, mixing time
Control is between 1-5 minutes.Then, according to the specific requirement in water-borne base coat host operation instructions in water-borne base coat master
Curing agent is added in agent, to reach the curing agent ratio requirement in operation instructions.Curing agent need to be during stirring gradually
Add, continue to stir to well mixed after addition.Wherein, in the curing agent and step 101 that are added in water-borne base coat host
The effect of the curing agent added in water-base epoxy priming paint host is identical, no longer superfluous herein referring specifically to the description in step 101
State.
After water-borne base coat host and curing agent are stirred, added in right amount according to the actual conditions of mixture
Deionized water, deionized water need to be gradually added into during stirring, and it is overall mixed to painting to continue stirring 1-10 minutes after addition
Close uniform.Need to ensure in allocation process, deionized water content≤15% in the water-borne base coat after the completion of allotment,
And the viscosity of water-borne base coat will be between the 30-50 seconds.Wherein, to the Viscosity Measurement Methods and step of water-borne base coat
The Viscosity Measurement Methods of water-based epoxy primer are identical in 101, and referring specifically to the description in step 101, here is omitted.
After the completion of being allocated to water-borne base coat, the water-borne base coat that the allotment can be used to complete enters to aluminum alloy bodywork
Row spraying.
Specifically, ZIP52 type application membrane pumps can be selected to carry out the spraying of water-borne base coat to aluminum alloy bodywork.
ZIP52 type application membrane pump atomizing effects are good, can obtain the topcoat surface of high quality.In use, can first will be deployed
Water-borne base coat be added in ZIP52 type application membrane pumps, then to application membrane pump carry out parameter setting, wherein will dress every
The spray pressure of membrane pump is arranged to 0.4-0.6MPa, and carries out spraying operation from the spray gun of the rifle mouth equipped with a diameter of 1.1mm.
Illustrated below by taking once specific spraying process as an example.Aluminium is closed using the method longitudinally sprayed in this step
Golden car body carries out the spraying of water-borne base coat, i.e., is sprayed above car body to lower section, sprays a completion, and spraying process connects
Continue, without time interval.In addition, the usage time of water-borne base coat must not exceed the working life of coating, coating applicable period refers to mix
Coating after conjunction allows the time placed, and more than this time limit, coating will be unable to use.
Wherein, after the spraying that water-borne base coat is carried out to aluminum alloy bodywork, in the wet coating thickness that aluminum alloy bodywork surface is formed
Degree is controlled in 100 microns, the aluminum alloy bodywork after spraying is placed under the 4th drying condition after processing is dried, institute
The dry film gross thickness of the water-borne base coat of formation is controlled between 20-30 microns.Wherein, the wet-film thickness of water-borne base coat and dry
Membrane thickness measured method is identical with the wet-film thickness and thickness of dry film measuring method of the water-base epoxy priming paint in step 101, specifically
Referring to the description in step 101, here is omitted.
Alternatively, before water-borne base coat spraying is carried out to aluminum alloy bodywork, also need first to enter the corollary equipment of spraying
Row cleaning, first can be cleaned using water successively, then be cleaned with waterborne cleaning agent, finally be cleaned again with water.Wherein, cleaned
The waterborne cleaning agent selected in journey contains very effective interfacial agent, penetrates into the trickle gap of any difficult cleaning,
Spot is quickly peeled off and cleaned out, also, with superpower cleaning permeability, low bubble performance, in spraying equipment after cleaning
In will not form residual.
Step 105, water varnish is sprayed to the aluminum alloy bodywork after drying process, and done under the 5th drying condition
Dry processing.
Specifically, after aluminum alloy bodywork forms the water-borne base coat dry film of qualified thickness by drying process, pass through
Corresponding spraying equipment is placed under the 4th drying condition to vehicle body coating water varnish, and by the aluminum alloy bodywork after spraying
Row drying process.
Wherein, the 5th drying condition is：It is 2 small that aluminum alloy bodywork after spraying water varnish is placed in 60 degrees Celsius of dryings
When；Or it is placed in 16 hours of 20-30 degrees Celsius of drying.
Alternatively, environment temperature and relative humidity not only impact to water-base epoxy priming paint, also equally to water-based clear
Paint impacts, and the process specifically impacted can be found in above-described embodiment, and here is omitted.Therefore, to aluminium alloy car
When body carries out the spraying of water varnish, by the temperature control of its painting environments between 15-30 degrees Celsius, relative humidity control exists
Between 10%-70%.
It is worth explanatorily, in the present embodiment, it is necessary in advance before water-borne base coat spraying is carried out to aluminum alloy bodywork
Water varnish is allocated.It is possible, firstly, to water varnish host is stirred by Pneumatic stirring machine, mixing time control
Between 1-5 minutes.Then, added according to the specific requirement in water varnish host operation instructions in water varnish host
Curing agent, to reach the curing agent ratio requirement in operation instructions.Curing agent need to be gradually added into during stirring, be added
After continue stirring to well mixed.Wherein, the curing agent added in water varnish host and water-based epoxy primer in step 101
The effect of the curing agent added in host is identical, and referring specifically to the description in step 101, here is omitted.
After water varnish host and curing agent are stirred, appropriate go is added according to the actual conditions of mixture
Ionized water, deionized water need to be gradually added into during stirring, continue to stir 1-10 minutes after addition to the overall mixing of paint
Uniformly.Need to ensure in allocation process, deionized water content≤15% in the water varnish after the completion of allotment, and
The viscosity of water varnish will be between the 20-35 seconds.Wherein, to the Viscosity Measurement Methods of water varnish with it is water-based in step 101
The Viscosity Measurement Methods of epoxy primer are identical, and referring specifically to the description in step 101, here is omitted.
After the completion of being allocated to water varnish, the water varnish that the allotment can be used to complete sprays to aluminum alloy bodywork
Apply.
Specifically, ZIP52 type application membrane pumps can be selected to carry out the spraying of water varnish to aluminum alloy bodywork.ZIP52
Type application membrane pump atomizing effect is good, can obtain the topcoat surface of high quality.In use, can first will be deployed water-based
Varnish is added in ZIP52 type application membrane pumps, then the setting of parameter is carried out to application membrane pump, wherein the spray that will fill membrane pump
Apply pressure and be arranged to 0.4-0.6MPa, and spraying operation is carried out from the spray gun of the rifle mouth equipped with a diameter of 1.1mm.
Illustrated below by taking once specific spraying process as an example.Fig. 4 is the water varnish spraying process signal in Fig. 1
Figure, as shown in figure 4, carrying out the spraying of water varnish in this step to aluminum alloy bodywork using the method for right-angled intersection, i.e., from car
Sprayed simultaneously to lower section, one end to the other end above body, spraying process continuously, without time interval, after the completion of one time, treat table
After face varnish milky is taken off, then spray second time, the spraying method of second time is identical with first pass.In addition, water varnish
Usage time must not exceed the working life of coating, and coating applicable period refers to that mixed coating allows the time placed, more than this
Individual time limit, coating will be unable to use.
Wherein, after the spraying that water varnish is completed to aluminum alloy bodywork, in the wet coating thickness that aluminum alloy bodywork surface is formed
Degree is controlled in 100 microns, the aluminum alloy bodywork after spraying is placed under the 5th drying condition after processing is dried, institute
The dry film gross thickness of the water varnish of formation is controlled between 20-30 microns.Wherein, the wet-film thickness and dried film thickness of water varnish
It is identical with the wet-film thickness and thickness of dry film measuring method of the water-base epoxy priming paint in step 101 to spend measuring method, referring specifically to
Description in step 101, here is omitted.
Alternatively, before water-borne base coat spraying is carried out to aluminum alloy bodywork, also need first to enter the corollary equipment of spraying
Row cleaning, first can be cleaned using water successively, then be cleaned with waterborne cleaning agent, finally be cleaned again with water.Wherein, cleaned
The waterborne cleaning agent selected in journey contains very effective interfacial agent, penetrates into the trickle gap of any difficult cleaning,
Spot is quickly peeled off and cleaned out, also, with superpower cleaning permeability, low bubble performance, in spraying equipment after cleaning
In will not form residual.
In the present embodiment, on the premise of the spraying facility of existing solvent based coating application is not changed, only pass through change
Operating environment, spraying method, drying condition and other construction parameters of spraying, the technique for being achieved that water paint application.
Solvent based coating is substituted using water paint, the consumption of petroleum resources can be efficiently reduced, while decrease volatility to have
The discharge capacity of the harmful substances such as machine compound, reduce the safety of enterprise and environmentally friendly cost, it is even more important that be painting workshop
Manufacturing Worker creates a more environmentally-friendly and healthy operating environment；In addition, do not changing existing solvent based coating application
Spraying facility under conditions of realize water paint application technique, significantly reduce more exchange device and job shop
The cost of transformation；Meanwhile by using water paint, effectively eliminate inflammable, explosive caused by script solvent based coating
Danger and storing and work progress in inconvenience, reduction storage and transport cost.
On the basis of embodiment illustrated in fig. 1, Fig. 5 is the coating process side for the water paint that the embodiment of the present invention two provides
The flow chart of method.As shown in figure 5, the process of the present embodiment includes：
Step 201, the surface to aluminum alloy bodywork to be sprayed carry out grinding process, by aluminum alloy bodywork to be sprayed
Surface roughness control between 3.2-12.5 microns.
Specifically, due to subsequently needing to carry out spray painting processing to aluminum alloy bodywork to be sprayed, it is therefore necessary to ensure its table
The roughness in face, if its surface roughness is excessive, the extension paint of coating and the surface quality of lacquer painting can be directly affected.Can
To select sanding equipment or the artificial method using sand paper to carrying out grinding process to the surface of aluminum alloy bodywork to be sprayed,
After polishing, the surface roughness of aluminum alloy bodywork to be sprayed is controlled between 3.2-12.5 microns.
Impurity in step 202, the removal aluminum alloy bodywork surface to be sprayed.
Specifically, because aluminum alloy bodywork to be sprayed is to be welded by machining, being heat-treated etc. after technique, and
And also its surface is polished, therefore its surface can always remain the impurity such as grease, dust, metal fragment, these impurity
Can directly affect the later stage paints the adhesive force and surface quality of the lacquer painting to be formed.Therefore, enter to aluminum alloy bodywork to be sprayed
Before row spraying, the impurity on its surface can be cleared up by Mechanical Method and chemical method.Wherein Mechanical Method is by instrument
The method handled its surface, such as wiped using instrument, surface impurity is carried out using scraper strike off, utilize equipment
Carry out ball blast etc.；Chemical rule is the method for carrying out impurity removing by chemically reacting, such as carries out oil using alkaline cleaning fluid
Fat is cleaned, and impurity cleaning etc. is carried out using acidic cleaning solution.
Step 203, processing is dried to aluminum alloy bodywork to be sprayed.
Specifically, to going the aluminum alloy bodywork to be sprayed after the removal of impurity that processing is dried, fire can directly be passed through
Flame baking mode be dried, can also be placed in the specially hothouse of temperature be dried, can also by air-dry
Mode be dried, not to the drying process mode and ring of the aluminum alloy bodywork to be sprayed in the step in the present embodiment
Border is defined.
Step 204, to being protected on aluminum alloy bodywork to be sprayed without the position of spraying.
Specifically, because aluminum alloy bodywork to be sprayed is complicated, for some positions and need not carry out at spraying
Reason, therefore, needs to carry out masking protection to these parts before being sprayed.In the present embodiment, can select to pass through adhesive tape
These are protected without the position of spraying, after spraying operation completion, tears adhesive tape off.
Step 205, water-base epoxy priming paint is sprayed to aluminum alloy bodywork to be sprayed, and done under the first drying condition
Dry processing.
The specific implementation of step 205 repeats no more here with reference to the description of step 101 in embodiment one.
Step 206, the chassis part to aluminum alloy bodywork spray the thick slurry paint of water-base epoxy, and enter under the 6th drying condition
Row drying process.
Specifically, after aluminum alloy bodywork forms the water-base epoxy primer dry films of qualified thickness by drying process, make
The body part without the thick slurry paint spraying of water-base epoxy is protected with adhesive tape, by corresponding spraying equipment to car body bottom
Frame 2 sprays the thick slurry paint of water-base epoxy, and the aluminum alloy bodywork after spraying is placed under the 6th drying condition processing is dried.
Wherein, the 6th drying condition is：It is Celsius that the aluminum alloy bodywork sprayed after the thick slurry of water-base epoxy paints is placed in 30-40
12 hours are dried in environment between degree；Or 3 hours are first dried in the environment between 50-60 degrees Celsius successively, then
It is placed in 23 degrees Celsius of environment and dries 12 hours.
Alternatively, environment temperature and relative humidity not only impact to water-base epoxy priming paint, also equally to water-based ring
The thick slurry paint of oxygen impacts, and the process specifically impacted can be found in above-described embodiment, and here is omitted.Therefore, to aluminium
When alloy car body carries out the spraying of the thick slurry paint of water-base epoxy, by the temperature control of its painting environments between 15-30 degrees Celsius, phase
To humid control between 10%-70%.
Be worth explanatorily, in the present embodiment, before the thick slurry paint spraying of water-base epoxy is carried out to aluminum alloy bodywork, it is necessary to
The thick slurry paint of water-base epoxy is allocated in advance.It is possible, firstly, to the thick slurry paint host of water-base epoxy is carried out by Pneumatic stirring machine
Stirring, mixing time were controlled between 1-5 minutes.Then, according to specific in the thick slurry paint host operation instructions of water-base epoxy
It is required that curing agent is added in the thick slurry paint host of water-base epoxy, to reach the curing agent ratio requirement in operation instructions.Solidification
Agent need to be gradually added into during stirring, continue to stir to well mixed after addition.Wherein, in the thick slurry paint host of water-base epoxy
The curing agent added and the effect phase of the curing agent added in water-based epoxy primer host in the step 101 of embodiment one
Together, referring specifically to the description in the step 101 of embodiment one, here is omitted.
After the thick slurry paint host of water-base epoxy and curing agent are stirred, added according to the actual conditions of mixture suitable
The deionized water of amount, deionized water need to be gradually added into during stirring, and it is whole to painting to continue stirring 1-10 minutes after addition
Body is well mixed.Need to ensure in allocation process, the deionized water content in the aqueous primer surfacer after the completion of allotment≤
15%.
After the completion of to the thick slurry paint allotment of water-base epoxy, the thick slurry paint of water-base epoxy that the allotment can be used to complete closes to aluminium
Golden car body is sprayed.
Specifically, high pressure airless spray equipment can be selected to carry out the spraying of the thick slurry paint of water-base epoxy to aluminum alloy bodywork.Make
Used time, first the thick slurry paint of deployed water-base epoxy can be added in high pressure airless spray equipment, then to high pressure airless spray equipment
The setting of parameter is carried out, wherein the force feed ratio of flush coater is arranged into 40:1 or 48:1, spray pressure is arranged to 0.4-
0.6MPa, and carry out spraying operation from the rifle mouth of 617 models or 619 models.
Illustrated below by taking once specific spraying process as an example.Using horizontal spraying method to aluminium alloy in this step
Car body carries out the spraying of the thick slurry paint of water-base epoxy, i.e., is sprayed from one end of vehicle body bottom frame 2 to the other end, and a completion is spray coated
Cheng Lianxu, without time interval, the wherein spray distance between rifle mouth and aluminum alloy bodywork is 150-300mm.In addition, water-base epoxy
The usage time of thickness slurry paint must not exceed working life of coating, coating applicable period refer to that mixed coating allows to place when
Between, more than this time limit, coating will be unable to use.
Wherein, after the spraying that the thick slurry paint of water-base epoxy is carried out to aluminum alloy bodywork, formed on aluminum alloy bodywork surface wet
Film thickness is controlled between 300-400 microns, the aluminum alloy bodywork after spraying is placed under the 6th drying condition place is dried
After reason, the thickness of dry film of the thick slurry of water-base epoxy formed is controlled more than 150 microns.Wherein, the thick slurry of water-base epoxy paints
Wet-film thickness and thickness of dry film measuring method and the wet-film thickness and dried film thickness of the water-base epoxy priming paint in the step 101 of embodiment one
Degree measuring method is identical, and referring specifically to the description in the step 101 of embodiment one, here is omitted.
Alternatively, before aluminum alloy bodywork is sprayed, also need first to clean the corollary equipment of spraying, can be with
First cleaned using water, then cleaned with waterborne cleaning agent successively, finally cleaned again with water.Wherein, selected in cleaning process
Waterborne cleaning agent contains very effective interfacial agent, penetrates into the trickle gap of any difficult cleaning, and spot is quick
Stripping cleans out, also, with superpower cleaning permeability, low bubble performance, will not be formed in spraying equipment after cleaning
Residual.
It is noted that there is no sequencing between step 206 and step 207-210, as long as hold after step 205
Row step 206, it is the execution step 206 between step 205 and step 207 in the present embodiment.Certainly, in other embodiment
In, it can also be and perform step 206 in step 207-210 after either step.
Step 207, putty is scratched to the aluminum alloy bodywork after drying process, and place is dried under the second drying condition
Reason.
Step 208, aqueous primer surfacer is sprayed to the aluminum alloy bodywork after drying process, and carried out under the 3rd drying condition
Drying process.
Step 209, water-borne base coat is sprayed to the aluminum alloy bodywork after drying process, and carried out under the 4th drying condition
Drying process.
Step 210, water varnish is sprayed to the aluminum alloy bodywork after drying process, and done under the 5th drying condition
Dry processing.
Step 207-210 specific implementation is no longer gone to live in the household of one's in-laws on getting married here with reference to the description of step 102-105 in embodiment one
State.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
- A kind of 1. coating process of water paint, it is characterised in that including：Water-base epoxy priming paint is sprayed to aluminum alloy bodywork to be sprayed, and processing is dried under the first drying condition；Putty is scratched to the aluminum alloy bodywork after drying process, and processing is dried under the second drying condition；Aqueous primer surfacer is sprayed to the aluminum alloy bodywork after drying process, and place is dried under the 3rd drying condition Reason；Water-borne base coat is sprayed to the aluminum alloy bodywork after drying process, and place is dried under the 4th drying condition Reason；Water varnish is sprayed to the aluminum alloy bodywork after drying process, and processing is dried under the 5th drying condition.
- 2. process according to claim 1, it is characterised in that the water-base epoxy priming paint, the aqueous primer surfacer, The temperature control of the spraying operation environment of the water-borne base coat and the water varnish is between 15-30 degrees Celsius, relatively Humid control is between 10%-70%.
- 3. process according to claim 1, it is characterised in that water-based ring is being sprayed to aluminum alloy bodywork to be sprayed Before oxygen priming paint, in addition to：Grinding process is carried out to the surface of the aluminum alloy bodywork to be sprayed, by the table of the aluminum alloy bodywork to be sprayed Surface roughness is controlled between 3.2-12.5 microns；Remove the impurity on the aluminum alloy bodywork surface to be sprayed；Processing is dried to the aluminum alloy bodywork to be sprayed；To being protected on the aluminum alloy bodywork to be sprayed without the position of spraying.
- 4. process according to claim 1, it is characterised in thatDeionized water content≤15% in the water-base epoxy priming paint, the viscosity of the water-base epoxy priming paint is between the 40-60 seconds Between；Deionized water content≤15% in the aqueous primer surfacer, the viscosity of the aqueous primer surfacer is between the 30-40 seconds；Deionized water content≤15% in the water-borne base coat, the viscosity of the water-borne base coat is between the 30-50 seconds；Deionized water content≤15% in the water varnish, the viscosity of the water-borne base coat is between the 20-35 seconds.
- 5. process according to claim 1, it is characterised in thatAfter processing is dried under first drying condition, the thickness of dry film of the water-base epoxy priming paint formed between Between 60-100 microns；After processing is dried under the 3rd drying condition, the thickness of dry film of the aqueous primer surfacer formed is between 60- Between 100 microns；After processing is dried under the 4th drying condition, the thickness of dry film of the water-borne base coat formed is between 20- Between 30 microns；After processing is dried under the 5th drying condition, the thickness of dry film of the water varnish formed is between 20-30 Between micron.
- 6. according to the process described in claim any one of 1-5, it is characterised in thatFirst drying condition is：12 hours are dried between 30-40 degrees Celsius；Or successively 50-60 degrees Celsius it Between dry 3 hours, in 23 degrees Celsius of dry 12 hours；Second drying condition is：In 60 degrees Celsius of dry 1 hours；Or dried 16 hours at 20 degrees Celsius；3rd drying condition is：Dried 12 hours between 30-40 degrees Celsius；Or successively between 20-30 degrees Celsius 1 hour is dried, 3 hours are dried under 60 degrees celsius, 12 hours are dried under 23 degrees celsius；4th drying condition is：In 40 degrees Celsius of dry half an hours；Or dry one to one at 20-30 degrees Celsius And a half hours；5th drying condition is：In 60 degrees Celsius of dry 2 hours；Or in 20-30 degrees Celsius of dry 16 hours.
- 7. process according to claim 1, it is characterised in that processing is dried under the first drying condition Afterwards, in addition to：To the thick slurry paint of chassis part spraying water-base epoxy of the aluminum alloy bodywork, and place is dried under the 6th drying condition Reason.
- 8. process according to claim 7, it is characterised in that the spraying operation environment of the thick slurry paint of the water-base epoxy Temperature control between 15-30 degrees Celsius, relative humidity control between 10%-70%.
- 9. process according to claim 7, it is characterised in thatAfter processing is dried under the 6th drying condition, the thickness of dry film of the thick slurry paint of water-base epoxy formed exists More than 150 microns.
- 10. according to the process described in claim any one of 7-9, it is characterised in that6th drying condition is：12 hours are dried under 30-40 degrees celsius；Or successively at 50-60 degrees Celsius 3 hours are dried, in 23 degrees Celsius of dry 12 hours.
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| CN201710648946.2A CN107377335A (en) | 2017-08-01 | 2017-08-01 | The coating process of water paint |
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| CN201710648946.2A CN107377335A (en) | 2017-08-01 | 2017-08-01 | The coating process of water paint |
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| CN111097670A (en) * | 2019-12-31 | 2020-05-05 | 河北京车轨道交通车辆装备有限公司 | Water-based coating and preparation method and application thereof |
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Application publication date: 20171124 |