CN107592828A - Painting device - Google Patents
Painting device Download PDFInfo
- Publication number
- CN107592828A CN107592828A CN201680019212.1A CN201680019212A CN107592828A CN 107592828 A CN107592828 A CN 107592828A CN 201680019212 A CN201680019212 A CN 201680019212A CN 107592828 A CN107592828 A CN 107592828A
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- China
- Prior art keywords
- mentioned
- pipeline
- pressure
- carbon dioxide
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
- B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/0093—At least a part of the apparatus, e.g. a container, being provided with means, e.g. wheels or casters for allowing its displacement relative to the ground
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
Abstract
The painting device (100) of the present invention has：With maximum supply pressure PCO2Supply the carbon dioxide supply unit (F of carbon dioxideCO2), with maximum supply pressure PPSupply the coating supply unit (F of coatingP), will be from carbon dioxide supply unit (FCO2) supply carbon dioxide and from coating supply unit (FP) coating of supply is obtained by mixing the mixing unit (32) of mixture, the spraying portion (36) to be sprayed to mixture, by carbon dioxide supply unit (FCO2) the first pipeline (L for being connected with mixing unit (32)1), by coating supply unit (FP) the second pipeline (L for being connected with mixing unit (32)2), the 3rd pipeline (L that is connected mixing unit (32) with spraying portion (36)3), be arranged at the first pipeline (L1), setting pressure PBVThe first counterbalance valve (18) and be arranged at the second pipeline (L2) check-valves (28), carbon dioxide supply unit (FCO2) maximum supply pressure PCO2, coating supply unit (FP) maximum supply pressure PPWith the setting pressure P of the first counterbalance valve (18)BVMeet PCO2＞ PBV＞ PPRelation.
Description
Technical field
The present invention relates to painting device.
Background technology
It is known the mixture of the coating comprising resin component and carbon dioxide is sprayed to object so-called two
Carbonoxide finishing.For the technology relevant with carbon dioxide finishing, such as developed perhaps as patent document 1~6
More technologies.
Prior art literature
Patent document
Patent document 1：No. 4538625 publications of Japanese Patent No.
Patent document 2：No. 5429928 publications of Japanese Patent No.
Patent document 3：No. 5429929 publications of Japanese Patent No.
Patent document 4：No. 5660605 publications of Japanese Patent No.
Patent document 5：No. 5568801 publications of Japanese Patent No.
Patent document 6：No. 5608864 publications of Japanese Patent No.
The content of the invention
The invention problem to be solved
But for existing painting device, there occurs obstruction caused by the precipitation of resin in painting device.
The present invention in view of above-mentioned problem and complete, and it is an object of the present invention to provide the generation of the obstruction in painting device can be mitigated
Painting device.
For solving the scheme of problem
The present inventor studies with keen determination, the spray gun for as a result finding to be sprayed in the mixture to coating and carbon dioxide
When Push And Release switches over, perhaps because the flow of carbon dioxide changes, therefore the resin in mixture becomes easily to separate out, and thinks
The present invention is arrived.
The painting device that the mode of the present invention is related to has：With maximum supply pressure PCO2Supply the dioxy of carbon dioxide
Change carbon supply portion, with maximum supply pressure PPSupply the coating supply unit of coating, by what is supplied from above-mentioned carbon dioxide supply unit
Carbon dioxide and the coating supplied from above-mentioned coating supply unit are obtained by mixing the mixing unit of mixture, carry out said mixture
The spraying portion of spraying, the first pipeline that above-mentioned carbon dioxide supply unit is connected with above-mentioned mixing unit, by above-mentioned coating supply unit
The second pipeline for being connected with above-mentioned mixing unit, the 3rd pipeline that above-mentioned mixing unit is connected with above-mentioned spraying portion, be arranged at it is above-mentioned
First pipeline, setting pressure PBVThe first counterbalance valve and be arranged at the check-valves of above-mentioned second pipeline, above-mentioned carbon dioxide supplies
Maximum supply pressure P to portionCO2, above-mentioned coating supply unit maximum supply pressure PPWith the setting pressure of above-mentioned first counterbalance valve
Power PBVMeet PCO2＞ PBV＞ PPRelation.
If the painting device with above-mentioned composition, the generation of the obstruction in painting device can be mitigated.Not by spy
Fixed theoretical constraint, the mechanism that the present inventor mitigates to the obstruction in painting device as described below are speculated.
Even if by the maximum supply pressure P of carbon dioxide supply unitCO2With the maximum supply pressure P of coating supply unitPSetting
For identical value, due in the pulsation due to the pump used in carbon dioxide supply unit and coating supply unit and spraying portion
Spray action on and off switching when device in big pressure oscillation etc., frequently keep by carbon dioxide supply to
Pressure in first pipeline of mixing unit is difficult to the equal state of the pressure in the second pipeline of mixing unit with coating is supplied.
Due to the variation of the pressure in such device, the pressure that carbon dioxide is supplied to the first pipeline of mixing unit is less than coating
Supply to the second pipeline of mixing unit pressure in the case of, coating adverse current to supply carbon dioxide the first pipeline.Moreover, by
In compared with the solubility parameter of the resin in coating (SP values), the SP values of carbon dioxide are at a fairly low, therefore have flowed into the first pipe
Resin component in the coating of line separates out, it is possible to blocks in the first pipeline.Therefore, in the painting device of the present invention
In, by advance by the maximum supply pressure P of carbon dioxide supply unitCO2It is set to the maximum supply pressure than coating supply unit
PPHeight, so as to there is the variation of pressure in device, it can also suppress coating adverse current to the first pipeline for supplying carbon dioxide.
If the here, maximum supply pressure P by carbon dioxide supply unitCO2It is set to supply than the maximum of coating supply unit
Give pressure PPHeight, in the state of the spray action in spraying portion is closed, due to the pressure differential between two supply units, carbon dioxide stream
Enter to supply the second pipeline of coating.The painting device of the present invention utilizes the check-valves present in the second pipeline, can suppress two
Carbonoxide cross check-valves and adverse current to the second pipeline.
In addition, in the state of the spray action in spraying portion is closed, the pressure of the upstream of check-valves becomes coating confession
Maximum supply pressure P to portionP, the pressure in the downstream of check-valves becomes the maximum supply pressure P of carbon dioxide supply unitCO2。
Then, if the spray action in spraying portion be changed to out from concern, until under the pressure and check-valves of the upstream of check-valves
The pressure of trip is changed into equal, only supplies carbon dioxide to spraying portion via mixing unit from carbon dioxide supply unit.Then, non-return
After the pressure of the upstream of valve is changed into equal with the pressure in the downstream of check-valves, just coating is supplied from coating supply unit to mixing unit
Give, by coating and carbon dioxide mix in mixing unit, be possibly realized with certain flow-rate ratio supply mixture.So will spraying
Portion from concern be changed to out when, the stage, the concentration of carbon dioxide became extremely dense in mixing unit and downstream in the early stage, thus
Resin component in mixing unit, the 3rd pipeline and spraying portion in coating becomes easily to separate out.
Wherein, painting device of the invention has the first counterbalance valve in the first pipeline, by the setting pressure of the first counterbalance valve
Power PBVIt is set to the maximum supply pressure P than coating supply unitPIt is high and than the maximum supply pressure P of carbon dioxide supply unitCO2
Low (PCO2＞ PBV＞ PP).Therefore, if spraying portion is changed to out from concern, the pressure of the first pipeline is from PCO2Reduce, first
The pressure of first pipeline of the upstream side of counterbalance valve is less than the setting pressure P of the first counterbalance valveBVAt the time of, the first counterbalance valve closes
Close, temporarily cease the supply of the carbon dioxide from carbon dioxide supply unit to mixing unit.Thus, it is possible in the downstream of check-valves
Pressure reduction accelerate while, reduce eliminate check-valves upstream side and check-valves downstream between pressure differential it
The amount of the preceding carbon dioxide for individually flowing into mixing unit.Therefore, to coating and titanium dioxide since the Guan Zhikai in spraying portion switching
The flow-rate ratio of carbon turns into certain, mitigates the resin component in coating and separates out and occur in mixing unit, the 3rd pipeline or spraying portion
The phenomenon of obstruction.
In addition, the maximum supply pressure P of above-mentioned carbon dioxide supply unitCO2Maximum supply with above-mentioned coating supply unit is pressed
Power PPIt disclosure satisfy that 0.02MPa≤PCO2-PP≤ 3MPa relation.It is more than above-mentioned lower limit, so as to easily press down by the pressure differential
Coating or mixture adverse current processed extremely supplies the first pipeline of carbon dioxide.In addition, by the pressure differential be above-mentioned higher limit below,
So as to when spraying portion is changed to out from concern, easily reduce between the upstream side for eliminating check-valves and the downstream of check-valves
Pressure differential before individually flow into mixing unit and the amount of carbon dioxide downstream.Therefore, the resin in coating is further mitigated
Into the phenomenon for analyzing and blocking in painting device.
In addition, the maximum supply pressure P of above-mentioned carbon dioxide supply unitCO2With the setting pressure P of above-mentioned first counterbalance valveBV
It disclosure satisfy that 0.001MPa≤PCO2-PBV≤ 2MPa relation.By the pressure differential be above-mentioned lower limit more than, the first counterbalance valve
The pressure of upstream side is not easy to be less than the setting pressure P of the first counterbalance valve because of the pulsation of carbon dioxide supply unitBV, by carbon dioxide
More stably supplied to mixing unit.In addition, being below above-mentioned higher limit by the pressure differential, stop so as to easily reduce in elimination
Mixing unit and carbon dioxide downstream are individually flowed into before returning the pressure differential between the upstream side of valve and the downstream of check-valves
Amount.Therefore, the phenomenon that the resin component in coating is separated out and blocked in painting device is further mitigated.
And then painting device of the invention can also have and be arranged at above-mentioned 3rd pipeline, setting pressure PRVPressure-reducing valve,
The maximum supply pressure P of above-mentioned coating supply unitpWith the setting pressure P of above-mentioned pressure-reducing valveRVMeet Pp＞ PRVRelation.
So, by setting pressure-reducing valve, the spray amount of said mixture is more stable, can carry out the higher painting of levelability
Dress.
And then above-mentioned carbon dioxide supply unit can have：Carbon dioxide cylinder, discharge side is connected to above-mentioned first pipeline
Carbon dioxide pump, the 4th pipeline that above-mentioned carbon dioxide cylinder is connected with above-mentioned carbon dioxide pump, by the upper of above-mentioned first pipeline
State the 5th pipeline that the upstream side of the first counterbalance valve connects with above-mentioned 4th pipeline and second back of the body for being arranged at above-mentioned 5th pipeline
Pressure valve, the maximum supply pressure P of above-mentioned carbon dioxide supply unitCO2For the setting pressure of above-mentioned second counterbalance valve.
So, it is the composition with the second counterbalance valve by carbon dioxide supply unit, so as to further highly control
The maximum supply pressure P of carbon dioxide supply unit processedCO2。
In addition, above-mentioned coating supply unit can have：Paint can, the paint pump that discharge side is connected to above-mentioned second pipeline,
The 6th pipeline that above-mentioned coating tank is connected with above-mentioned coating pump, by the upstream side of the above-mentioned check-valves of above-mentioned second pipeline with it is upper
State the 7th pipeline of the 6th pipeline connection and be arranged at the 3rd counterbalance valve of above-mentioned 7th pipeline, above-mentioned coating supply unit is most
Big supply pressure PPFor the setting pressure of above-mentioned 3rd counterbalance valve.
It is the composition with the 3rd counterbalance valve so by coating supply unit, so as to further highly control coating
The maximum supply pressure P of supply unitP。
Wherein, above-mentioned coating supply unit can have paint can, paint pump and be connected above-mentioned coating tank with above-mentioned coating pump
The 6th pipeline, above-mentioned coating pump is air driven.
The pump for so having air driven by coating supply unit is used as paint pump, so as to further highly control
The maximum supply pressure P of coating supply unit processedP。
Wherein, the volume in the downstream of the first counterbalance valve of above-mentioned first pipeline can be below 1000mL.
So diminished by the volume in the downstream for the first counterbalance valve for making the first pipeline, so as to by spraying portion from concern
When being changed to out, individually flowed into before easily reducing the pressure differential between the upstream side for eliminating check-valves and the downstream of check-valves
The amount of mixing unit and carbon dioxide downstream.Therefore, further mitigate coating in resin component separate out and in painting device
The interior phenomenon blocked.
The effect of invention
In accordance with the invention it is possible to mitigate the generation of the obstruction in painting device.
Brief description of the drawings
Fig. 1 is the flow chart for the painting device 100 that embodiments of the present invention are related to.
Fig. 2 is the flow chart for the painting device 200 that embodiments of the present invention are related to.
Embodiment
Referring to the drawings, the mode for implementing the present invention is explained.It should illustrate, in the explanation of accompanying drawing,
Same reference is marked to same key element, the repetitive description thereof will be omitted.
＜ first embodiments ＞
The painting device 100 that reference picture 1 is related to first embodiment illustrates.Painting device 100 has titanium dioxide
Carbon supply portion FCO2, coating supply unit FP, counterbalance valve 18, check-valves 28, mixing unit 32, pressure-reducing valve 34, spraying portion 36 and pipeline
L1~L3。
First, carbon dioxide supply unit FCO2Have：Carbon dioxide cylinder 12, discharge side is connected to pipeline L1Titanium dioxide
Carbon pump 14, the pipeline L for being connected carbon dioxide cylinder 12 with carbon dioxide pump 144, by pipeline L1Counterbalance valve 18 upstream side and pipe
Line L4The pipeline L of connection5And it is arranged at pipeline L5Counterbalance valve 16.Carbon dioxide supply unit FCO2With maximum supply pressure PCO2For
To carbon dioxide.
Carbon dioxide cylinder 12 is the pressure vessel for storing carbon dioxide.Carbon dioxide cylinder 12 is not particularly limited, can
Use commercially available carbon dioxide cylinder.
Carbon dioxide pump 14 to from carbon dioxide cylinder 12 via pipeline L4The carbon dioxide of supply is pressurizeed.To the shape of pump
Formula is not particularly limited, and can use pump known to plunger pump, gear pump etc..The dioxy that will have been pressurizeed by carbon dioxide pump 14
Change carbon to pipeline L1Supply.
Counterbalance valve 16 is arranged at pipeline L5, control carbon dioxide supply unit FCO2Maximum supply pressure PCO2.Specifically, will
The primary side (entrance side) of counterbalance valve 16 is connected to pipeline L1Counterbalance valve 18 upstream side, counterbalance valve 16 secondary side (outlet
Side) and pipeline L4Connection.Therefore, if pipeline L1Counterbalance valve 18 upstream side pressure turn into counterbalance valve 16 setting pressure
(carbon dioxide supply unit FCO2Maximum supply pressure PCO2) more than, then the counterbalance valve 16 of closing is opened, carbon dioxide via
Pipeline L5From pipeline L1It is back to pipeline L4.Thus, it is possible to by pipeline L1The pressure of upstream side of counterbalance valve 18 frequently keep
Below the setting pressure of counterbalance valve 16.Therefore, it is possible to further highly control carbon dioxide supply unit FCO2Maximum supply
Pressure PCO2, in addition, the breakage of pipeline caused by the rising of pressure can be prevented.
Pass through pipeline L1Carbon dioxide pump 14 is connected with mixing unit 32, in pipeline L1In be provided with counterbalance valve 18.Counterbalance valve
18 control pipeline L1In carbon dioxide flowing.Specifically, the primary side (entrance side) of counterbalance valve 18 is connected to titanium dioxide
Carbon pump 14, the secondary side (outlet side) of counterbalance valve 18 is connected with mixing unit 32.Therefore, if pipeline L1Counterbalance valve 18 it is upper
The pressure of trip turns into the setting pressure P of counterbalance valve 18BVHereinafter, then counterbalance valve 18 is closed, from carbon dioxide supply unit FCO2To mixing
The supply of the carbon dioxide in portion 32 stops.If pipeline L1Counterbalance valve 18 upstream pressure turn into counterbalance valve 18 setting pressure
Power PBVMore than, then counterbalance valve 18 is again turned on, and is again turned on the supply of the carbon dioxide to mixing unit 32.Passed through by carbon dioxide
Cross pipeline L1In the composition supplied to mixing unit 32, by the setting pressure P of counterbalance valve 18BVIt is set to the setting pressure than counterbalance valve 16
Low (the P of powerCO2＞ PBV)。
Wherein, pipeline1The volume in downstream of counterbalance valve 18 can be below 1000mL, preferably below 200mL, more
Preferably below 20mL.So, by making pipeline L1The volume in downstream of counterbalance valve 18 diminish, so as to by spraying portion 36
When being changed to out from concern, can reduce eliminate check-valves 28 upstream side and check-valves 28 downstream between pressure differential it
The amount of preceding individually inflow mixing unit 32 and carbon dioxide downstream.Therefore, it is possible to further reduce carbon dioxide for coating
Flow-rate ratio variation, further mitigate that the resin component in coating separates out and that blocks in the painting device 100 show
As.
Next, coating supply unit FPHave：Paint can 22, discharge side is connected to pipeline L2Paint pump 24, by coating
The pipeline L that tank 22 is connected with paint pump 246, by pipeline L2Check-valves 28 upstream side and pipeline L6The pipeline L of connection7And set
It is placed in pipeline L7Counterbalance valve 26.Coating supply unit FPWith maximum supply pressure PPSupply coating.
The coating of liquid of the storage of paint can 22 comprising resin component.Coating can include solvent in addition to resin component
With various additives.As long as commonly used resin composition, solvent and addition in resin component, solvent and additive coating
Agent, then there is no particular restriction.Pressure in paint can 22 is usually normal pressure, i.e. atmospheric pressure, in order to which coating stabilization is supplied to pump,
Can be pressurizeed 0.1~0.2MPa.
As resin component, such as epoxy resin (about 22), acrylic resin (about 19), acrylic acid series ammonia can be included
Carbamate resin (about 17~22), polyester resin (about 22), acrylic acid series silicones (about 17~22), alkyd resin (about 17
~25), UV solidified resins (about 17~23), vinyl chloride-vinyl acetate resin (about 19~22), styrene butadiene ribber
(about 17~18), polyester urethane resin (about 19~21), styrene acrylic system resin (about 19~21), amino resins
(about 19~21), polyurethane resin (about 21), phenolic resin (about 23), vinyl chloride resin (about 19~22), NC Nitroncellulose tree
Fat (about 22~24), cellulose acetate-butyrate resin (about 20), styrene resin (about 17~21) and melamine urea resin
(about 19~21).These can be used alone or are used in mixed way two or more.Resin component can be single solution curing type resin,
It can also be biliquid gel-type resin, can also be UV isoreactivity energy-line solidifying type resins.It should illustrate, in above-mentioned parantheses
Numerical value is solubility parameter, and its unit is (MPa)0.5。
Solubility parameter is Hildebrand solubility parameter.Solubility parameter (is designated as SP values below.) it is expression thing
The thermodynamic parameter of the yardstick of compatibility between matter, it is known that tend to easily dissolve between the material with similar SP values.
Resin component can for example have 17 (MPa)0.5Above, 18 (MPa)0.5Above, 19 (MPa)0.5SP values above,
There can be 25 (MPa)0.5Below, 24 (MPa)0.5Below, 23.5 (MPa)0.5Following SP values.
The SP values of resin component can be obtained as described below.That is, resin is dissolved in good solvent A, is respectively dropped into SP values ratio
High poor solvent H and the SP value of the good solvent poor solvent L lower than good solvent, record is until resin separates out, be needed for gonorrhoea each
The amount of individual poor solvent.Good solvent A SP values are set to δA, poor solvent H SP values are set to δH, by poor solvent L SP values
It is set to δL, the good solvent A of white cloud point, poor solvent H, poor solvent L volume fraction are set to φA、φH、φLWhen, 2
The SP values δ of the mixed solvent of cloud pointGood solvent A+ poor solvents H、δGood solvent A+ poor solvents LCan averagely it be represented with the volume of SP values respectively, following formula
Set up.
δGood solvent A+ poor solvents H=(φA·δA 2+φH·δH 2)0.5
δGood solvent A+ poor solvents L=(φA·δA 2+φL·δL 2)0.5
Therefore, the SP values SP of resinRFor
SPR=((VGood solvent A+ poor solvents H·δGood solvent A+ poor solvents H 2+VGood solvent A+ poor solvents L·δGood solvent A+ poor solvents L 2)/(VGood solvent A+ poor solvents H+
VGood solvent A+ poor solvents L))0.5
Wherein, VGood solvent A+ poor solvents H、VGood solvent A+ poor solvents LFor the molar average volume of the cloud point of mixed solvent, for example, the former
Obtained according to following formula.
1/VGood solvent A+ poor solvents H=φA/VA+φH/VH
Wherein, VA、VHRespectively good solvent A and poor solvent H molal volume.
Solvent can be the mixture of the first solvent and the second solvent.
First solvent is SP values less than 23.5 (MPa)0.5Solvent, be can by resin component dissolve true solvent.First
The SP values SP of solventFirst solventRelative to the SP values SP of resin componentR, can be SPR-7≤SPFirst solvent≤SPR+4.It is molten as first
Agent, such as methyl iso-butyl ketone (MIBK) (17.2), acetic acid 3- methoxybutyls (20.5), propylene glycol monomethyl ether can be included
(18.7), Solvesso 100 (manufacture of east combustion ゼ ネ ラ Le oil society, trade name) (17.6), (the east combustion ゼ of Solvesso 150
The manufacture of ネ ラ Le oil Co., Ltd., trade name) (17.4), ethyl diethylene glycol (DEG) acetic acid esters (18.5), n-butanol (23.3), two different
Butyl ketone (16), ethyl acetate (18.6), butyl acetate (17.0) and dimethylbenzene (18.0), ethylo benzene (18.0).Above-mentioned parantheses
Interior numerical value is SP values, and its unit is (MPa)0.5。
First solvent can be SP values less than 23.5 (MPa)0.5Solvent mixture.As long as the use level of the first solvent
To be capable of the scope of dissolving resin composition, then it is not particularly limited, can be 25 relative to the mass parts of resin component 100~
10000 mass parts, preferably 25~1000 mass parts, more preferably 87~461 mass parts.
Second solvent has 23.5~40 (MPa)0.5SP values.The example of second solvent is formamide (39.3), hydrazine
(37.3), glycerine (33.8), N-METHYLFORMAMIDE (32.9), 1,4- diformyls piperazine (31.5), 3- hydroxypropionitriles (31.1),
Malononitrile (30.9), 2- pyrrolidines (30.1), ethylene carbonate (30.1), methylacetamide (29.9), ethylene glycol (29.9), first
Alcohol (29.7), dimethyl sulfoxide (DMSO) (29.7), phenol (29.3), 1,4- diacetyl piperazines (28.0), maleic anhydride (27.8), 2-
Piperidones (27.8), formic acid (27.6), Methylethyl sulfone (27.4), pyranone (27.4), tetramethylene sulfone (27.4), propiolactone
(27.2), propylene carbonate (27.2), N-Nitrosodimethylamine (26.8), N- formyl-morpholines (26.6), 3- methyl sulfolanes
(26.4), nitromethane (26.0), ethanol (26.0), epsilon-caprolactams (26.0), propane diols (25.8), butyrolactone (25.8),
Chloroacetonitrile (25.8), methyl-propyl sulfone (25.6), furfuryl alcohol (25.6), phenylhydrazine (25.6), dimethylphosphite (25.6), 2- methoxies
Base ethanol (25.4), diethyl sulfone (25.4), ethylenediamine (25.2), ethyl acetamide (25.2), ethylene chlorhydrin (25.0), benzylalcohol
(24.8), 4- ethyls -1,3- dioxolan-2-ones (24.8), phthalic acid two (2- ethylhexyls) ester (24.8), dimethyl
Formamide (24.8), diethylene glycol (DEG) (24.8), BDO (24.8), tetrahydrochysene -2,4- thioxene 1,1- dioxide
(24.6), acrylic acid (24.6), 1- propyl alcohol (24.3), acetonitrile (24.3), allyl alcohol (24.1), 4- acetylmorpholines (23.7),
1,3 butylene glycol (23.7), formyl piperidine (23.5), pentanediol (23.5), isopropanol (23.5), ethylene glycol list phenyl ether
(23.5), ethyl cellosolve (23.5).Numerical value in above-mentioned parantheses is SP values, and unit is (MPa)0.5.Second solvent can be tool
There are 23.5~40 (MPa)0.5SP values solvent mixture.The SP values of second solvent can be 24 (MPa)0.5More than, can
For 25 (MPa)0.5More than.
In addition, as the use level in the coating fluid composition of the second solvent, relative to carbon dioxide and the second solvent
Total 100 mass parts, usually 5~95 mass parts, can be 6~84 mass parts, can be 10~80 mass parts.
Paint pump 24 to from paint can 22 via pipeline L6The coating supplied is pressurizeed.The form of pump is had no especially
Limit, pump known to plunger pump, gear pump etc. can be used.By using the coating that paint pump 24 pressurizes to pipeline L2Supply.
Counterbalance valve 26 is arranged at pipeline L7, control coating supply unit FPMaximum supply pressure PP.Specifically, by counterbalance valve
26 primary side (entrance side) is connected to pipeline L2Check-valves 28 upstream side, by the secondary side (outlet side) of counterbalance valve 26 with
Pipeline L6Connection.Therefore, if pipeline L2Check-valves 28 upstream side pressure turn into counterbalance valve 26 setting pressure (coating
The maximum supply pressure P of supply unitP) more than, then the counterbalance valve 26 closed is opened, and coating is via pipeline L7From pipeline L2It is back to
Pipeline L6.Thus, it is possible to frequently by pipeline L2The pressure of upstream side of check-valves 28 be maintained at the setting pressure of counterbalance valve 26
Below.Therefore, it is possible to further highly control coating supply unit FPMaximum supply pressure PP, in addition, pressure can be prevented
The breakage of pipeline caused by rising.
Pass through pipeline L2Paint pump 24 is connected with mixing unit 32, in pipeline L2In be provided with check-valves 28.By check-valves 28
It is connected to pipeline L2Be possibly realized with causing coating to be flowed from paint pump 24 to mixing unit 32, prevent coating, carbon dioxide or it
Mixture from pipeline L2Downstream (side of mixing unit 32) to the upstream side (side of paint pump 24) adverse current.
Mixing unit 32 will be from carbon dioxide pump 14 via pipeline L1The carbon dioxide that is supplied and from paint pump 24 via pipe
Line L2The coating supplied is obtained by mixing mixture.As mixing unit 32, such as pipeline mixer (inline can be used
mixer)。
Pass through pipeline L3Mixing unit 32 is connected with spraying portion 36, in pipeline L3In be provided with pressure-reducing valve 34.Pressure-reducing valve 34 will
Pipeline L3Pressure-reducing valve 34 downstream pressure to pressure-reducing valve 34 setting pressure PRV.Therefore, by the setting of pressure-reducing valve 34
Pressure PRVIt is set as than carbon dioxide supply unit FCO2Maximum supply pressure PCO2(the setting pressure of counterbalance valve 16), coating supply
The maximum supply pressure P in portionPThe setting pressure P of (the setting pressure of counterbalance valve 26) or counterbalance valve 18BVAll low value.So, lead to
Setting pressure-reducing valve 34 is crossed, the spray amount of mixture is more stable, can carry out the higher application of levelability.
Spraying portion 36 will be via pipeline L3Sprayed from the mixture that mixing unit 32 supplies to object.As spraying portion 36,
Known nozzle can be used.Object is not particularly limited, body of a motor car etc. can be included.
Then, for present embodiment painting device 100 effect, together with the pressure dependence in painting device 100
Illustrate.If by carbon dioxide supply unit FCO2Maximum supply pressure PCO2With coating supply unit FPMaximum supply pressure
PPIt is set as identical value, then due to due to carbon dioxide supply unit FCO2With coating supply unit FPUsed in carbon dioxide
The pulsation of pump 14 and paint pump 24 and, the switching of the on and off of spray action in spraying portion 36 when device in it is big
Pressure oscillation etc., frequently keep supplying carbon dioxide to the pipeline L of mixing unit 321Interior pressure is with coating is supplied to mixed
The pipeline L in conjunction portion 322The equal state of interior pressure is difficult.Due to the variation of the pressure in such device, by carbon dioxide
Supply to the pipeline L of mixing unit 321Pressure less than coating is supplied to the pipeline L of mixing unit 322Pressure in the case of, apply
Material adverse current extremely supplies the pipeline L of carbon dioxide1.It is additionally, since compared with the SP values of the resin in coating, the SP values of carbon dioxide
It is at a fairly low, therefore flowed into pipeline L1Coating in resin component separate out, it is possible in pipeline L1It is middle to block.
But in painting device 100 of the present embodiment, due to by carbon dioxide supply unit FCO2Maximum confession
Give pressure PCO2It is set to than coating supply unit FPMaximum supply pressure PPHeight, therefore have pressure in painting device 100
Variation, can also suppress coating adverse current to supply carbon dioxide pipeline L1。
If moreover, by carbon dioxide supply unit FCO2Maximum supply pressure PCO2It is set to than coating supply unit FPMost
Big supply pressure PPHeight, then in the state of the spray action in spraying portion 36 is closed, due to the pressure differential between two supply units, make
Carbon dioxide flows into the pipeline L of supply coating2.In the painting device 100 of present embodiment, using being present in pipeline L2Non-return
Valve 28, carbon dioxide can be suppressed and cross check-valves 28 and to pipeline L2Countercurrently.
And then in the state of the spray action in spraying portion 36 is closed, the pressure of the upstream of check-valves 28 becomes painting
Expect supply unit FPMaximum supply pressure PP, the pressure in the downstream of check-valves 28 becomes carbon dioxide supply unit FCO2Maximum confession
Give pressure PCO2.Then, if the spray action in spraying portion 36 be changed to out from concern, until the pressure of the upstream of check-valves 28
Power is changed into equal with the pressure in the downstream of check-valves 28, only by carbon dioxide from carbon dioxide supply unit FCO2Via mixing unit 32
Supplied to spraying portion 36.Then, after the pressure of the upstream of check-valves 28 becomes equal with the pressure in the downstream of check-valves 28, just from
Coating supply unit FPCoating is supplied to mixing unit 32, by coating and carbon dioxide mix, certain flow in mixing unit 32
The supply of the mixture to spraying portion 36 than under is possibly realized.So, the spray action in spraying portion 36 is changed to out from concern
When, locating the concentration of carbon dioxide in the stage in the early stage in mixing unit 32 and downstream becomes extremely dense, therefore mixing unit 32,
Pipeline L3In spraying portion 36, the resin component in coating becomes easily to separate out.
But in the painting device 100 of present embodiment, the setting pressure P of counterbalance valve 18BVFor carbon dioxide supply unit
FCO2Maximum supply pressure PCO2(the setting pressure of counterbalance valve 16) and coating supply unit FPMaximum supply pressure PP(counterbalance valve
26 setting pressure), meet PCO2＞ PBV＞ PPRelation.Therefore, if spraying portion 36 is changed to out from concern, pipeline
L2Check-valves 28 downstream and pipeline L1Pressure from PCO2Reduce, the pipeline L in the upstream side of counterbalance valve 181Pressure it is low
In the setting pressure P of counterbalance valve 18BVAt the time of, temporarily cease from carbon dioxide supply unit FCO2To the carbon dioxide of mixing unit 32
Supply.Therefore, while the reduction of the pressure in the downstream of check-valves 28 is accelerated, it can reduce and eliminate check-valves 28
Mixing unit 32 and carbon dioxide downstream are individually flowed into before pressure differential between upstream side and the downstream of check-valves 28
Amount.Therefore, started since spraying portion 36 by closing to the switching opened until the flow-rate ratio of coating and carbon dioxide makes painting as necessarily
Resin component in material separate out and in mixing unit 32, pipeline L3Or the phenomenon blocked in spraying portion 36 mitigates.
Wherein, carbon dioxide supply unit FCO2Maximum supply pressure PCO2With coating supply unit FPMaximum supply pressure PP
It disclosure satisfy that PCO2-PP≤ 3MPa relation, disclosure satisfy that PCO2-PP≤ 1MPa relation, disclosure satisfy that PCO2-PP≤ 0.5MPa's
Relation.By meeting these relations, so as to when spraying portion 36 is changed to out from concern, easily reduce and eliminate the upper of check-valves 28
Mixing unit 32 and the amount of carbon dioxide downstream are individually flowed into before swimming the pressure differential between the downstream of side and check-valves 28.
Therefore, it is possible to further make carbon dioxide reduce for the variation of the flow-rate ratio of coating, the resin in coating is further reduced
Into the phenomenon for analyzing and blocking in painting device 100.
In addition, carbon dioxide supply unit FCO2Maximum supply pressure PCO2With coating supply unit FPMaximum supply pressure PP
It disclosure satisfy that 0.02MPa≤PCO2-PPRelation, disclosure satisfy that 0.5MPa≤PCO2-PPRelation, disclosure satisfy that 1MPa≤PCO2-
PPRelation.By meeting these relations, so as to easily suppress coating or mixture to the pipeline L of supply carbon dioxide1Countercurrently.
Therefore, it is possible to more effectively mitigate in the phenomenon that nearby resin component is separated out and blocked of counterbalance valve 18.
In addition, carbon dioxide supply unit FCO2Maximum supply pressure PCO2With the setting pressure P of counterbalance valve 18BVIt disclosure satisfy that
PCO2-PBV≤ 2MPa relation, disclosure satisfy that PCO2-PBV≤ 1MPa relation, disclosure satisfy that PCO2-PBV≤ 0.5MPa relation.
By meeting these relations, when spraying portion 36 is switched on from pass, easily reduce eliminate check-valves 28 upstream side with
Mixing unit 32 and the amount of carbon dioxide downstream are individually flowed into before pressure differential between the downstream of check-valves 28.Therefore,
Variation of the carbon dioxide for the flow-rate ratio of coating can further be reduced, the resin component further mitigated in coating separates out
And the phenomenon blocked in painting device 100.
In addition, carbon dioxide supply unit FCO2Maximum supply pressure PCO2With the setting pressure P of counterbalance valve 18BVIt disclosure satisfy that
0.001MPa≤PCO2-PBVRelation, disclosure satisfy that 0.05MPa≤PCO2-PBVRelation, disclosure satisfy that 0.1MPa≤PCO2-PBV
Relation.By meeting these relations, the pressure of the upstream side of counterbalance valve 18 is not easy to be less than because of the pulsation of carbon dioxide pump 14
The setting pressure P of counterbalance valve 18BV, carbon dioxide is more stably supplied to mixing unit 32.
＜ second embodiments ＞
The painting device 200 that reference picture 2 is related to second embodiment illustrates.Painting device 200 and first is implemented
Mode difference is coating supply unit FPComposition.
The coating supply unit F of second embodimentPWith the coating supply unit F of first embodimentPIt is a difference in that and does not have
Counterbalance valve 26 and pipeline L7This point and paint pump 24 are this point of air driven.The pump of air driven, which utilizes, to be supplied
The pressure of air carrys out convection body and applies stressed pump, the MDP of air driven pump from the air that is supplied to pump most
Big pressure specifications.Due to such composition, the coating supply unit F in second embodimentPMaximum supply pressure PPAs coating
The MDP of pump 24.It is identical with first embodiment in terms of other of second embodiment.
The action effect same with first embodiment is also produced by second embodiment.
Embodiments of the present invention are illustrated in detail above, but the present invention is not limited to above-mentioned embodiment party
Formula.For example, in Fig. 1 and Fig. 2 painting device, can be set between counterbalance valve 18 and mixing unit 32 permission from counterbalance valve 18 to
The check-valves of the flowing of mixing unit 32.By setting check-valves, so as to more positively prevent coating or mixture from crossing
Counterbalance valve 18 and to pipeline L1Countercurrently.
In addition, in Fig. 1 and Fig. 2 painting device, cooler or heater can be set in arbitrary position.For example, can be
Set between carbon dioxide cylinder 12 and carbon dioxide pump 14.
Embodiment
Invention is specifically described below based on embodiment, but the present invention is not limited to following embodiment.
(embodiment 1~4)
, will with the ratio shown in table 1 and 2 in fig. 2 in shown painting device 200 for embodiment 1~4
S.COAT No.2010 W-1 (manufacture of エ ス U ー ト Co., Ltd.), DIBK (DIBK) and methanol load paint can 22
It is interior.Then, at 20 DEG C of environment temperature by the carbon dioxide in the coating in paint can 22 and carbon dioxide cylinder 12 with as table 1
Mixed with the mode of the flow-rate ratio shown in 2 in mixing unit 32, open spray gun (spraying portion 36), by mixture from nozzle
(spraying portion 36) sprays.The setting pressure of in each embodiment, paint pump 24, counterbalance valve 16,18 and pressure-reducing valve 34 such as table 1 and 2
Shown in.As paint pump 24, the ASAHI SUNAC CORPORATION エ U Port Application (posts of air driven have been used
Fill in pump).
Table 1
Table 2
Spray time closes spray gun in every 30 seconds, temporarily ceases spraying, is again turned on spray gun after 5 seconds, is again turned on
Spraying.It is repeated, carries out 3 total 5 minutes sprayings, the occlusion to pipeline is evaluated.Show the result in table 1
In 2.It should illustrate, in table 1, Pw, Px, Py and Pz represent the value shown in pressure gauge Pw, Px, Py and Pz in Fig. 2 respectively.This
Value after 4 seconds after a little values are values after spray gun is opened after 4 seconds and close spray gun.
In the inaccessible evaluation of pipeline, the mark of table 1 and 2 corresponds to as described below.◎ means 3 successes, zero meaning
1 time or 2 successes, × mean no success.Complete the spraying of total 5 minutes with being successfully meant to non-blocking.
(comparative example 1,2,5,6)
As painting device, use beyond the painting device 200 without counterbalance valve 18, by same with embodiment 1~4
The operation of sample is sprayed.Evaluation result is shown in table 1 and 2.
(comparative example 3,7)
Sprayed by the operation same with embodiment 1~4.Evaluation result is shown in table 1 and 2.
(comparative example 4,8)
As painting device, use in pipeline L1, be also provided with check-valves between counterbalance valve 18 and mixing unit 32
Beyond painting device 200, sprayed by the operation same with embodiment 1~4.Evaluation result is shown in table 1 and 2.
(embodiment 5~8)
As painting device, the painting device 100 shown in Fig. 1 has been used, has made counterbalance valve 16,18,26 and pressure-reducing valve 34
Setting pressure turn into table 3 and 4 shown in value beyond, sprayed by the operation same with embodiment 1~4.It will comment
Valency result is shown in table 3 and 4.As paint pump 24, IWAKI＆CO. is used, (motor drives LTD. high-pressure plunger pump MP
The plunger pump of formula).
(comparative example 9,10)
As painting device, use beyond the painting device 100 without counterbalance valve 18, by same with embodiment 5~8
The operation of sample is sprayed.Evaluation result is shown in table 3 and 4.
Table 3
Table 4
The explanation of reference
12 ... carbon dioxide cylinders, 14 ... carbon dioxide pumps, 16,18,26 ... counterbalance valves, 22 ... paint cans, 24 ... paint pumps,
28 ... check-valves, 32 ... mixing unit, 34 ... pressure-reducing valves, 36 ... spraying portions, 100,200 ... painting devices.
Claims (8)
1. painting device, it has：
With maximum supply pressure PCO2The carbon dioxide supply unit of supply carbon dioxide,
With maximum supply pressure PPThe coating supply unit of supply coating,
It is obtained by mixing by the carbon dioxide supplied from above-mentioned carbon dioxide supply unit and from the coating of above-mentioned coating supply unit supply
Mixing unit to mixture,
Spraying portion that said mixture is sprayed,
The first pipeline that above-mentioned carbon dioxide supply unit is connected with above-mentioned mixing unit,
The second pipeline that above-mentioned coating supply unit is connected with above-mentioned mixing unit,
The 3rd pipeline that above-mentioned mixing unit is connected with above-mentioned spraying portion,
It is arranged at above-mentioned first pipeline, setting pressure PBVThe first counterbalance valve and
The check-valves of above-mentioned second pipeline is arranged at,
The maximum supply pressure P of above-mentioned carbon dioxide supply unitCO2, above-mentioned coating supply unit maximum supply pressure PPWith above-mentioned
The setting pressure P of one counterbalance valveBVMeet PCO2＞ PBV＞ PPRelation.
2. the painting device described in claim 1, wherein, the maximum supply pressure P of above-mentioned carbon dioxide supply unitCO2With it is above-mentioned
The maximum supply pressure P of coating supply unitPMeet 0.02MPa≤PCO2-PP≤ 3MPa relation.
3. the painting device described in claim 1 or 2, wherein, the maximum supply pressure P of above-mentioned carbon dioxide supply unitCO2With it is upper
State the setting pressure P of the first counterbalance valveBVMeet 0.001MPa≤PCO2-PBV≤ 2MPa relation.
4. the painting device described in any one of claims 1 to 3, wherein, also have and be arranged at above-mentioned 3rd pipeline, setting
Pressure PRVPressure-reducing valve, the maximum supply pressure P of above-mentioned coating supply unitPWith the setting pressure P of above-mentioned pressure-reducing valveRVMeet PP＞
PRVRelation.
5. the painting device described in any one of Claims 1 to 4, wherein, above-mentioned carbon dioxide supply unit has：
Carbon dioxide cylinder,
By discharge side be connected to above-mentioned first pipeline carbon dioxide pump,
The 4th pipeline that above-mentioned carbon dioxide cylinder is connected with above-mentioned carbon dioxide pump,
The 5th pipeline that the upstream side of above-mentioned first counterbalance valve of above-mentioned first pipeline is connected with above-mentioned 4th pipeline and
The second counterbalance valve of above-mentioned 5th pipeline is arranged at,
The maximum supply pressure P of above-mentioned carbon dioxide supply unitCO2For the setting pressure of above-mentioned second counterbalance valve.
6. the painting device described in any one of Claims 1 to 5, wherein, above-mentioned coating supply unit has：
Paint can,
By discharge side be connected to above-mentioned second pipeline paint pump,
The 6th pipeline that above-mentioned coating tank is connected with above-mentioned coating pump,
The 7th pipeline that the upstream side of the above-mentioned check-valves of above-mentioned second pipeline is connected with above-mentioned 6th pipeline and
The 3rd counterbalance valve of above-mentioned 7th pipeline is arranged at,
The maximum supply pressure P of above-mentioned coating supply unitPFor the setting pressure of above-mentioned 3rd counterbalance valve.
7. the painting device described in any one of Claims 1 to 5, wherein, above-mentioned coating supply unit has：
Paint can,
Paint pump and
The 6th pipeline that above-mentioned coating tank is connected with above-mentioned coating pump,
Above-mentioned coating pump is air driven.
8. the painting device described in any one of claim 1~7, wherein, the downstream of the first counterbalance valve of above-mentioned first pipeline
The volume of side is below 1000mL.
Applications Claiming Priority (3)
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| JP2016-093368 | 2016-05-06 | ||
| JP2016093368A JP5982074B1 (en) | 2016-05-06 | 2016-05-06 | Painting equipment |
| PCT/JP2016/064917 WO2017191690A1 (en) | 2016-05-06 | 2016-05-19 | Coating device |
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| JP (1) | JP5982074B1 (en) |
| KR (1) | KR101887008B1 (en) |
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| CN112236237A (en) * | 2018-06-08 | 2021-01-15 | 长濑产业株式会社 | Coating apparatus and coating method |
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| JP6251442B1 (en) * | 2016-09-06 | 2017-12-20 | 長瀬産業株式会社 | Coating method and coating apparatus |
| WO2018047358A1 (en) * | 2016-09-06 | 2018-03-15 | 長瀬産業株式会社 | Coating method |
| CN107983552A (en) * | 2017-12-19 | 2018-05-04 | 贵州航天乌江机电设备有限责任公司 | A kind of spraying equipment for using hydraulic pressure carbon dioxide as solvent |
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| Publication number | Publication date |
|---|---|
| JP5982074B1 (en) | 2016-08-31 |
| KR101887008B1 (en) | 2018-08-09 |
| CN107592828B (en) | 2018-10-12 |
| KR20170136516A (en) | 2017-12-11 |
| JP2017200688A (en) | 2017-11-09 |
| WO2017191690A1 (en) | 2017-11-09 |
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