CN102950092B - Insulation protection method for thermally-cured painted parts - Google Patents
Insulation protection method for thermally-cured painted parts Download PDFInfo
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- CN102950092B CN102950092B CN201210445380.0A CN201210445380A CN102950092B CN 102950092 B CN102950092 B CN 102950092B CN 201210445380 A CN201210445380 A CN 201210445380A CN 102950092 B CN102950092 B CN 102950092B
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Abstract
The invention discloses an insulation protection method for thermally-cured painted parts and belongs to the technical field of metal surface treatment. The insulation protection method is carried out according to the following steps: a part is firstly subjected to oil removal treatment; insulation protection paint is coated on the non-painted surface of the part by adopting the brush coating or spraying manner; the insulation protection paint is thoroughly cured, and the insulation protection paint on the surface which needs to be painted is thoroughly removed by using degreasing cotton dipped with acetone; the part is painted by adopting a conventional technological method, the painted part is heated to the temperature of 150-600 DEG C, and the insulation protection paint volatilizes automatically; and the paint layer on the non-painted surface is removed. With the insulation protection method for the thermally-cured painted parts, the surface quality of the painted parts is improved, the production cost is reduced, the processing cycle is shortened, energy resources are saved, and the problem that the surfaces of complicated parts are difficult to paint is solved.
Description
Technical field
The invention belongs to field of metal surface treatment technology, particularly a kind of heating cure class is sprayed paint the insulation protection method of part.
Background technology
The selection of insulation protection method is one of major influence factors determining enamelled coating surface quality and working (machining) efficiency.At present, the insulation protection method sprayed paint mainly contains three kinds, as: Special tooling clamp, mechanical shutter and insulation protection adhesive tape looping etc.But relative to the more complex parts of groove and hole, insulation protection operation easier is larger.Width is only to the little narrow limit of 2 ~ 3mm, as adopted above-mentioned three kinds of insulation protection methods, difficulty is larger.If select insulation protection frock or insulation protection adhesive tape, then project organization is complicated, and manufacturing cost is high, when carrying out blast operation before spraying paint, easily makes sand grains ensconce in fixture or adhesive tape.When spraying paint, sand grains drops on enamelled coating surface and forms the inclusion of sand grains, thus have impact on the surface quality of part enamelled coating.And after having sprayed paint, during clamper for disassembling, the easy scratching enamelled coating of fixture, easily causes reprocessing of enamelled coating.Therefore, for enamelled coating, if Complex Parts selects privacy protection frock to be worthless.Mechanical shutter just for the part of some simple shape, can also play certain effect, but complex parts its be inapplicable.
Summary of the invention
For above Problems existing; the invention provides a kind of novel heating cure class to spray paint the insulation protection method of part; namely the mode of brushing or spraying is adopted; a coating is applied in the non-painting region of part; when making to spray paint; paint vehicle cannot non-painting surface formed continuous enamelled coating, can not with matrix strong bonded.When follow-up enamelled coating solidification, the enamelled coating on non-painting surface can peel off automatically because adhesion is bad.Meanwhile, the insulation protection coating on non-painting surface is automatically volatilizing after high-temperature process, decreases secondary pollution.
The insulation protection method that a kind of heating cure class of the present invention sprays paint part, carries out according to following steps:
(1) oil removing: part is immersed in degreaser, at room temperature soak oil removing 20 ~ 60 minutes, dry in atmosphere or dry up, then, at (60 ~ 80) DEG C temperature, toast (20 ~ 40) min, ensure that the greasy dirt of piece surface is thoroughly cleaned out;
(2) at the non-painting surface coating insulation protection coating of part: with mechanical agitator, insulation protection coating is stirred, with X-1 or X-3 organic solvent, dope viscosity is adjusted to (13 ~ 20) S, adopt the method for spraying or brushing by the non-painting surface of insulation protection paint at part, guarantee that the thickness of coating is at (0.010 ~ 0.015) mm;
(3) solidify: often all over after apply, all need at room temperature to dry, keep (60 ~ 120) min, or solidify (20 ~ 40) min in the drying oven of (80 ~ 120) DEG C, guarantee that insulation protection coating thoroughly solidifies; The surface that need spray paint is covered with insulation protection coating as being coated with, then dip in acetone with absorbent cotton and thoroughly remove;
(4) spray paint: process is sprayed paint to part routinely;
(5) hot setting: heat the part having sprayed paint to (150 ~ 600) DEG C, makes insulation protection coating automatically volatilize;
(6) remove non-painting paint layer from surface: by sprayed paint part hot setting after; the enamelled coating on non-painting surface is blown with the compressed air of (0.2 ~ 0.6) MPa; now the enamelled coating of 90% peels off all; only has the non-Ex-all of indivedual point-like enamelled coatings; select the enamelled coating on the non-painting surface of (200 ~ 400) number sand papering; the enamelled coating on non-painting surface is thoroughly cleaned out, exposes the matrix surface of part, thus reach the effect of insulation protection of spraying paint.
Described degreaser is acetone.
Described insulation protection coating is PT50.
The operating pressure of described spraying is (0.2 ~ 0.6) MPa, and spray gun is 100 ~ 200mm to the distance of piece surface, and often spraying a THICKNESS CONTROL is 0.003 ~ 0.005mm, sprays 2 ~ 3 times.
This heating cure class insulation protection coating that sprays paint is a kind of blue organic coating of PT50 of non-refractory.After this coating is applied to piece surface, outward appearance is a bit similar to " marking pen ".One deck " tangerine peel " shape coating can be formed on its surface after spraying paint.Main cause is: non-painting surface is coated with this PT50 coating, defines blue layer diaphragm, and after causing spraying paint, enamelled coating on its surface continuously, paint film cannot occur and break, thus have impact on the adhesion of enamelled coating.
The baroque part that sprays paint, genus polyporus, many groove structures, mating surface is many simultaneously, assembly precision is high, and getting well of pre-treatment effect will have a strong impact on the quality of spraying with bad.Therefore, first acetone is adopted to be degreaser, part is immersed in degreaser, at room temperature soak oil removing 20 ~ 60 minutes, dry in atmosphere or dry up, then, at (60 ~ 80) DEG C temperature, toast (20 ~ 40) min, ensure that the greasy dirt of piece surface is thoroughly cleaned out.
Spraying or brushing insulation protection coating, concrete selection sprays or brushing, will determine in conjunction with the structure of part, then adopts brushing method to process for spraying complex parts.Through test of many times analysis, the thickness of PT50 coating is also that after determining and having sprayed paint, whether the enamelled coating on non-painting surface is easily removed.The operating pressure of spraying is (0.2 ~ 0.6) MPa, and spray gun is 100 ~ 200mm to the distance of piece surface, and often spraying a THICKNESS CONTROL is 0.003 ~ 0.005mm, sprays 2 ~ 3 times.Guarantee that the thickness of PT50 coating is at (0.010 ~ 0.015) mm.
Room temperature or low-temperature setting, often all over after having applied, all need at room temperature to dry, keep (60 ~ 120) min, also can in the drying oven of (80 ~ 120) DEG C solidification (20 ~ 40) min, guarantee that PT50 coating thoroughly solidifies, when avoiding spraying paint, pollute enamelled coating.The surface that need spray paint is covered with PT50 coating as being coated with, then adopting absorbent cotton to dip in acetone can thoroughly remove, and can not affect enamelled coating quality.
PT50 coating is when heating to (150 ~ 600) DEG C, and this coating can volatilize automatically, without the need to increasing except PT50 is coated with material process again.
After part spray painting completes, the kind according to the enamelled coating of piece surface coating selects suitable solidification temperature.When after enamelled coating solidification, the enamelled coating on non-painting surface will tilt, and enamelled coating peels off in the form of sheets, exposes the matrix surface of part, thus reaches the effect of insulation protection of spraying paint.
Remove non-painting paint layer from surface, after enamelled coating carries out hot setting, blow the enamelled coating on non-painting surface with the compressed air of (0.2 ~ 0.6) MPa, now the enamelled coating of 90% peels off all, only has the non-Ex-all of indivedual point-like enamelled coatings.Like this, the enamelled coating on the non-painting surface of (200 ~ 400) number sand papering can be selected, very easily just the enamelled coating on non-painting surface thoroughly can be cleaned out, without any residual.
In sum, PT50 coating belongs to organic coating, after the coating of non-painting surface, can play the effect of mechanical isolation, thus have influence on the adhesion of enamelled coating.Meanwhile, this coating non-refractory, carry out hot setting within the scope of (150 ~ 600) DEG C after, this coating all volatilizees, thus causes the enamelled coating on non-painting surface to tilt, and enamelled coating peels off in the form of sheets, serves the effect protected non-painting surface insulation.
A kind of heating cure class of the present invention is sprayed paint the insulation protection method of part, and after carrying out through engineering approaches application at the scene, onsite application effect is fine, performance and in stable condition.The performance indications such as the outward appearance of enamelled coating and adhesion all reach standard-required.Up to the present all parts produced equal 100% qualifiedly send.PT50 sprays paint insulating protection coating processing technology simply, and low production cost, easy to operate, isolation effect is good.This project application has a extensive future, and has extended at present on other model engine and has used, and can expand on surface treatment method simultaneously and use.
Before spraying paint, former employing frock, adhesive tape etc. carry out insulation protection, after now using PT50 coating protection instead, improve the surface quality of the part that sprays paint; reduce production cost; shorten the process-cycle, saved the energy, solve complex parts surface lacquer protection difficult problem.Increase work efficiency more than 50%.Now achieve batch production, and extend on other model engines and use.This insulation protection technology reaches domestically leading level, has filled up aviation field blank.Adopt this technology to complete the insulation protection task of nearly 10000 parts that spray paint, part spray painting quality 100% is qualified.After adopting the method to protect, save production cost from aspects such as energy cost, fee of material and working hour expenses.
Detailed description of the invention
Further illustrate method of the present invention by the following examples, the organic solvent that the present invention is used and coating are commercial.
embodiment 1
Part is immersed in acetone machine solvent, soak 20min, then dry up, at 60 DEG C of temperature, toast 40min, ensure that the greasy dirt of piece surface is thoroughly cleaned out.
With mechanical agitator, insulation protection coating is stirred, with X-1 or X-3 organic solvent, dope viscosity is adjusted to 13S; adopt the method for operating of spraying, pressure is 0.2MPa, and spray gun is 100mm to the distance of piece surface; often spraying a THICKNESS CONTROL is 0.003 ~ 0.005mm, sprays 3 times.The thickness of PT50 coating is 0.010mm.
Often all over after apply, at room temperature keep 60min, PT50 coating thoroughly solidifies, pollution enamelled coating when avoiding spraying paint.The surface that need spray paint is coated with and is covered with PT50 coating, and adopting absorbent cotton to dip in acetone can thoroughly remove.Then painting process is carried out.
After part spray painting completes, solidify at 150 DEG C of temperature.When after enamelled coating solidification, the enamelled coating on non-painting surface tilts, and enamelled coating peels off in the form of sheets, exposes the matrix surface of part, and matrix is light yellow oxidation tint, and coating volatilizees automatically, reaches the effect of insulation protection of spraying paint.
After enamelled coating 150 DEG C of hot settings, blow the enamelled coating on non-painting surface with the compressed air of 0.2MPa, now the enamelled coating of 90% peels off all, only has the non-Ex-all of indivedual point-like enamelled coatings.Select the enamelled coating on the 200 non-painting surfaces of sand papering, very easily just the enamelled coating on non-painting surface thoroughly can be cleaned out, without any residual, the surface quality of the part that sprays paint is qualified.
embodiment 2
Part is immersed in acetone machine solvent, soak 40min, then dry up, at 80 DEG C of temperature, toast 40min, ensure that the greasy dirt of piece surface is thoroughly cleaned out.
Stirred by insulation protection coating with mechanical agitator, with X-1 or X-3 organic solvent, dope viscosity is adjusted to 20S, adopt the method for operating of brushing, often brushing a THICKNESS CONTROL is 0.003 ~ 0.005mm, sprays 2 times.The thickness of PT50 coating is 0.015mm.
Often all over after apply, at room temperature keep 120min, PT50 coating thoroughly solidifies, pollution enamelled coating when avoiding spraying paint.The surface that need spray paint is coated with and is covered with PT50 coating, and adopting absorbent cotton to dip in acetone can thoroughly remove.Then painting process is carried out.
After part spray painting completes, solidify at 300 DEG C of temperature.When after enamelled coating solidification, the enamelled coating on non-painting surface tilts, and enamelled coating peels off in the form of sheets, exposes the matrix surface of part, and matrix is buff oxidation tint, and coating volatilizees automatically, reaches the effect of insulation protection of spraying paint.
After enamelled coating 300 DEG C of hot settings, blow the enamelled coating on non-painting surface with the compressed air of 0.4MPa, now the enamelled coating of 90% peels off all, only has the non-Ex-all of indivedual point-like enamelled coatings.Select the enamelled coating on the 400 non-painting surfaces of sand papering, very easily just the enamelled coating on non-painting surface thoroughly can be cleaned out, without any residual, the surface quality of the part that sprays paint is qualified.
embodiment 3
Part is immersed in acetone machine solvent, soak 60min, then dry up, at 80 DEG C of temperature, toast 20min, ensure that the greasy dirt of piece surface is thoroughly cleaned out.
With mechanical agitator, insulation protection coating is stirred, with X-1 or X-3 organic solvent, dope viscosity is adjusted to 15S; adopt the method for operating of spraying, pressure is 0.4MPa, and spray gun is 150mm to the distance of piece surface; often spraying a THICKNESS CONTROL is 0.003 ~ 0.005mm, sprays 2 times.The thickness of PT50 coating is 0.012mm.
Often all over after apply, at room temperature keep 120min, PT50 coating thoroughly solidifies, pollution enamelled coating when avoiding spraying paint.The surface that need spray paint is coated with and is covered with PT50 coating, and adopting absorbent cotton to dip in acetone can thoroughly remove.Then painting process is carried out.
After part spray painting completes, solidify at 350 DEG C of temperature.When after enamelled coating solidification, the enamelled coating on non-painting surface tilts, and enamelled coating peels off in the form of sheets, exposes the matrix surface of part, and matrix is buff oxidation tint, and coating volatilizees automatically, reaches the effect of insulation protection of spraying paint.
After enamelled coating 350 DEG C of hot settings, blow the enamelled coating on non-painting surface with the compressed air of 0.6MPa, now the enamelled coating of 90% peels off all, only has the non-Ex-all of indivedual point-like enamelled coatings.Select the enamelled coating on the 400 non-painting surfaces of sand papering, very easily just the enamelled coating on non-painting surface thoroughly can be cleaned out, without any residual, the surface quality of the part that sprays paint is qualified.
embodiment 4
Part is immersed in acetone machine solvent, soak 40min, then dry up, at 80 DEG C of temperature, toast 40min, ensure that the greasy dirt of piece surface is thoroughly cleaned out.
With mechanical agitator, insulation protection coating is stirred, with X-1 or X-3 organic solvent, dope viscosity is adjusted to 15S; adopt the method for operating of spraying, pressure is 0.6MPa, and spray gun is 150mm to the distance of piece surface; often spraying a THICKNESS CONTROL is 0.003 ~ 0.005mm, sprays 3 times.The thickness of PT50 coating is 0.015mm.
Often all over after apply, at 80 DEG C of temperature, toast 40min, PT50 coating thoroughly solidifies, pollution enamelled coating when avoiding spraying paint.The surface that need spray paint is coated with and is covered with PT50 coating, and adopting absorbent cotton to dip in acetone can thoroughly remove.Then painting process is carried out.
After part spray painting completes, solidify at 600 DEG C of temperature.When after enamelled coating solidification, the enamelled coating on non-painting surface tilts, and enamelled coating peels off in the form of sheets, exposes the matrix surface of part, and matrix is purple, and coating volatilizees automatically, reaches the effect of insulation protection of spraying paint.
After enamelled coating 600 DEG C of hot settings, blow the enamelled coating on non-painting surface with the compressed air of 0.6MPa, now the enamelled coating of 90% peels off all, only has the non-Ex-all of indivedual point-like enamelled coatings.Select the enamelled coating on the 200 non-painting surfaces of sand papering, very easily just the enamelled coating on non-painting surface thoroughly can be cleaned out, without any residual, the surface quality of the part that sprays paint is qualified.
embodiment 5
Part is immersed in acetone machine solvent, soak 20min, then dry up, at 80 DEG C of temperature, toast 20min, ensure that the greasy dirt of piece surface is thoroughly cleaned out.
With mechanical agitator, insulation protection coating is stirred, with X-1 or X-3 organic solvent, dope viscosity is adjusted to 15S; adopt the method for operating of spraying, pressure is 0.4MPa, and spray gun is 200mm to the distance of piece surface; often spraying a THICKNESS CONTROL is 0.003 ~ 0.005mm, sprays 3 times.The thickness of PT50 coating is 0.015mm.
Often all over after apply, at 120 DEG C of temperature, toast 20min, PT50 coating thoroughly solidifies, pollution enamelled coating when avoiding spraying paint.The surface that need spray paint is coated with and is covered with PT50 coating, and adopting absorbent cotton to dip in acetone can thoroughly remove.Then painting process is carried out.
After part spray painting completes, solidify at 600 DEG C of temperature.When after enamelled coating solidification, the enamelled coating on non-painting surface tilts, and enamelled coating peels off in the form of sheets, exposes the matrix surface of part, and matrix is purple, and coating volatilizees automatically, reaches the effect of insulation protection of spraying paint.
After enamelled coating 600 DEG C of hot settings, blow the enamelled coating on non-painting surface with the compressed air of 0.6MPa, now the enamelled coating of 90% peels off all, only has the non-Ex-all of indivedual point-like enamelled coatings.Select the enamelled coating on the 200 non-painting surfaces of sand papering, very easily just the enamelled coating on non-painting surface thoroughly can be cleaned out, without any residual, the surface quality of the part that sprays paint is qualified.
Claims (1)
1. heating cure class is sprayed paint the insulation protection method of part, it is characterized in that carrying out according to following steps:
(1) oil removing: soaked in acetone by part, at room temperature soaks oil removing 20 ~ 60 minutes, dries in atmosphere or dry up, and then, at 60 ~ 80 DEG C of temperature, toasts 20 ~ 40min, ensures that the greasy dirt of piece surface is thoroughly cleaned out;
(2) at the non-painting surface coating insulation protection coating of part: with mechanical agitator, insulation protection coating is stirred, with X-1 or X-3 organic solvent, dope viscosity is adjusted to 13 ~ 20s, adopt the method for spraying or brushing by the non-painting surface of insulation protection paint at part, apply 2 ~ 3 times, guarantee that the thickness of coating is at 0.010 ~ 0.015mm, wherein: the operating pressure of spraying is (0.2 ~ 0.6) MPa, spray gun is 100 ~ 200mm to the distance of piece surface, often spraying a THICKNESS CONTROL is 0.003 ~ 0.005mm, sprays 2 ~ 3 times;
(3) solidify: often all over after apply, all need at room temperature to dry, keep 60 ~ 120min, or solidify (20 ~ 40) min in the drying oven of (80 ~ 120) DEG C, guarantee that insulation protection coating thoroughly solidifies; If the surface that need spray paint is coated with and is covered with insulation protection coating, then dip in acetone with absorbent cotton and thoroughly remove;
(4) spray paint: process is sprayed paint to part routinely;
(5) high temperature removes insulation protection coating: heat the part having sprayed paint to (150 ~ 600) DEG C, and insulation protection coating is volatilized automatically;
(6) remove the enamelled coating on non-painting surface: by sprayed paint part hot setting after; the enamelled coating on non-spraying surface is blown with the compressed air of (0.2 ~ 0.6) MPa; now the enamelled coating of 90% peels off all; only has the non-Ex-all of indivedual point-like enamelled coatings; select the enamelled coating on the non-painting surface of (200 ~ 400) number sand papering; the enamelled coating on non-spraying surface is thoroughly cleaned out, exposes the matrix surface of part, thus reach the effect of insulation protection of spraying paint.
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| CN201210445380.0A CN102950092B (en) | 2012-11-09 | 2012-11-09 | Insulation protection method for thermally-cured painted parts |
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| CN201210445380.0A CN102950092B (en) | 2012-11-09 | 2012-11-09 | Insulation protection method for thermally-cured painted parts |
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| CN110170437B (en) * | 2018-12-29 | 2022-05-17 | 山东达驰高压开关有限公司 | Spraying process method of arc-resistant high-resistance red enamel paint |
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| CN102123564A (en) * | 2010-11-26 | 2011-07-13 | 中国北方车辆研究所 | Conformal coating shielding method of circuit board |
| CN102127345A (en) * | 2010-12-17 | 2011-07-20 | 武汉吉亨新材料科技有限公司 | Water-based coating composition, preparation method thereof and method for taking water-based coating composition as strippable coating protective film |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102123564A (en) * | 2010-11-26 | 2011-07-13 | 中国北方车辆研究所 | Conformal coating shielding method of circuit board |
| CN102127345A (en) * | 2010-12-17 | 2011-07-20 | 武汉吉亨新材料科技有限公司 | Water-based coating composition, preparation method thereof and method for taking water-based coating composition as strippable coating protective film |
Non-Patent Citations (2)
| Title |
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| D.W.范克雷维伦.聚合物的性质 性质的估算及其与化学结构的关系.《聚合物的性质 性质的估算及其与化学结构的关系》.科学出版社,1981,345-346. * |
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