汽车油漆补灰技巧（Automobile paint repairing technique）

1、汽车油漆补灰技巧（Automobile paint repairing technique）1, prevent the edge of atomic ash low dent skillsOne of the methods: spray with special back cover paint (or two primer), play a barrier role, prevent solvent infiltration coating, etc. after drying, with fine sand grinding primer, so that the surface of

2、 the coating workpiece smooth.Methods: two. in spray paint, nitro first scraping putty in putty edge, or use in special scraping trachoma quick drying putty such as drying, water sand grinding smooth, the barrier function.Three methods: If time does not allow, according to the above approach, you ne

3、ed to directly spray paint. At this point, the specific method of operation is: electronic table in the vicinity of the coating, part of the spraying of atomic ash. In addition, if the event has a low phenomenon, as long as can solve this phenomenon according to the way of dealing with people, as fo

4、llows:. (1) in the film after drying, with special fine sandpaper gasket flat rubber pad to the concave sand flat (Note: be sure to use the flat rubber pad, also must be sanded smooth). When we see a light to see with the naked eye side had no obvious part of sand, to mark, and then use the fast dry

5、ing volatile diluent to spray at a moderate degree of wetness, if need to spray the two, should be sufficient time interval. (2) in atomic ash obviously concave scraping - Nitro putty (Note: only a thin coating or use sealer or two primer), dry with fine sand is smooth, spray paint. Then in order to

6、 truly ensure the coating is smooth, no indentation marks. If you need to spray metal paint, you must wait until the metal paint is dry and then cover it with a two-component varnish.2, reasons and treatment skills of film cracking. (1) the reason why the film is cracked(.1) the car used for too lon

7、g, the film aging and natural cracking.(.2) the builder pursues the paint gloss one by one, blindly increasing the thickness of the paint, spraying repeatedly, and each time interval is too short and not sufficiently dried.(.3) wet primer, wet finish, or topcoat, poorly compatible with primer. (2) p

8、revention and cure of film cracking(.1) if it is cracked because of the aging of the paint film, and the film appears soft, it should be completely removed.(.2) strictly control the thickness of paint film and not spray too thick.(.3) master the properties of various paints and choose the best quali

9、ty brand.(.4) in accordance with the construction requirements, each layer should be fully dried and then sprayed second layers, pay attention to the compatibility of topcoat and primer. (3) of the film. The film: severe cracking cracking, but also with the shovel shovel moving film, can use conserv

10、ative therapy. When the paint is dry, beat it with sandpaper to the light free state, and then scrape a thin layer of putty on the cracked paint film to make the bottom again. (Note: if the surface of the paint film is cracked, the water shovel can not be used under this condition. a film on the loo

11、se. The shovel shovel falls, only to complete the paint sand mill to the metal surface, re coating.The color matching techniques for.3 and automotive patchesThe color matching is based on the spectral color standard card. The color should be matched from the color card, and the standard coating samp

12、le can be matched by the user. The specific steps are as follows:. (1) to distinguish the color palette, first by color, accurate in standard light conditions to identify the hue and lightness and purity, and defined the main color, color and other color will be used and adjust the hue and lightness

13、 and purity of color pigment. (2) choose the right color, color coating with ammonium is required to tip type, varieties and diluent and auxiliary material matched principle, selection of excellent performance and economical color pigment preparation with Qidai.(3) first, after a small sample, a lar

14、ge number of adjustments, in the absence of color matching equipment conditions, but also should first tune the sample, to obtain the accuracy of pigment ratio, for a large number of modulation, to lay the foundation for waste reduction.(4) the modulation steps and measures should be in strict accor

15、dance with the principle of first master, second time, and crude sequence. When mixing, they should be fully stirred and dissolved evenly.(5) auxiliary materials should be added in accordance with the strict proportion to adapt to the variety, when the deployment of timely and appropriate amount of

16、added intermodulation.In particular, it should be noted that the paint is wet and the sample color is solid, so the color of the paint tone should be slightly shallower than the sample structure, not too close and not too deep. Should be slightly shallower than the primary color, so that after the d

17、ry paint will be the same plate color, otherwise it will be too deep.The reasons and treatment skills of putty impression on.4Fill with the putty (putty) in the two-component paint, and after spraying the finish coat, sometimes the putty print appears. The main reasons are as follows:. (1) using ato

18、mic ash; inferior quality. (2) use inferior, two component primers.(3) the ratio of atomic ash to curing agent is not correct. (4) the two component paint does not dry completely and fills the ash.In order to avoid the putty print due to the above reasons, we should pay attention to the following po

19、ints in advance:(1) must use high quality putty (putty), can avoid putty printing and light defects. (2) use high quality, two component medium coat primer and coat primer with proper number of layers (3 layers).(3) the formula that should be provided by a licensed manufacturing plant. Pay attention

20、 to the proportion of putty (putty) and curing agent, and precisely prepare. (4) a new two-component film spray for filling, heating must be dry before filling putty.If the lacquer surface has putty print, the following measures can be taken:(1) can be polished with P1500 sand paper, and then repair

21、ed with wax process. (2) when it is serious, paint again after sanding.The phenomenon of. And the treatment measures. 5, paintThe main reasons for. The micropyle:(1) the surface of the paint is contaminated with waxes, silicides, grease, or lubricating oils.(2) no oil and water separator is added to

22、 the compression pump, and there is water and oil pollution in the trachea. (3) underlying the old paint solvent bubble defect effect produced when spraying paint, micropyle.In order to avoid the phenomenon of. advance should pay attention to the following points:(1) before spraying, use the degreas

23、ing agent to clean the surface of the workpiece, and remove the dirt, grease or lubricating oil, etc., so as to keep the surface clean. (2) use 1 water soluble detergents and spray the workpiece on 4 tap water cleaning solutions.(3) if the old paint is found to have solvent foam defects, it should b

24、e filled with two components of primer, and the paint can be painted on top. If the paint appears the micropyle, can take the following measures:(1) after the paint film is completely dried, the affected film is sanded with P8000 sand paper and sprayed again;. (2) if the micropyle is serious, until

25、completely dry film, completely polished after filling the hole with the micropyle, ash filled, polished re sprayed two primer and topcoat.6, film processing skills for producing orange peel wrinklesThe cause of wrinkles in orange peel:. (1) use bad solvents. (2) use improper nozzles (too large) and

26、 air pressure (Tai Di).(3) the viscosity of chalk is too high. (4) spraying too thick or spraying gun incorrect. (5) unsuitable spraying process.If film, orange peel wrinkles can be taken:(1) after the paint film is dry, use P1500 sand paper to polish it and then recover it with wax process. (2) whe

27、n conditions are serious, re spray after grinding.Notes on.7 and the use of two-component paintTwo component low temperature baking finish (2K) uses a small amount of reactive isocyanate curing agent, which can infect the respiratory system and cause potential harm. In use, if the bank will strictly

28、 abide by the following suggestions that would not hinder the health.(1) two component paint can only be used in a well ventilated spray booth, preferably in a qualified spray shop with high efficiency exhaust equipment.(2) continuous use of a two-component paint containing isocyanate requires the u

29、se of an air supply mask and requires the use of non polluted air as a source of gas for the mask. (3) in a very short period of time (less than 15min), a mask (usually dust mask) that can meet the standard requirements for the protection of isocyanates shall not be used to protect against the chemi

30、cal damage caused by cyanuric acid.(4) people who have any respiratory diseases (such as asthma) must not use or contact a two-component paint containing isocyanate. (5) regular physical examination.The treatment of.8 and double component paint resulting in poor dryingIn order to meet the requiremen

31、ts of different temperature differences (cold hot), two component paints are designed with different driers and diluents. Improper use will result in bad drying and solvent bubbles. Therefore, it is necessary to comply with the recommended dilution ratio of the paint manufacturer and use suitable dr

32、iers and thinners.If the drying is bad and solvent bubbles are removed, the following remedies can be used:(1) if the solvent bubble is slight, you can try IC164 number wax to draw the surface of the film, then polish it with IC19 wax water to give the original luster. (2) if it is re sprayed by P80

33、0 wet grinding sandpaper fight thoroughly, such as the discovery of small blisters, spraying 2K thick primer filled, spray paint after heavy sanding. (3) if the situation is serious, remove old paint and reprocess.9, treatment measures to re spray paint and two-component paint wrinkling phenomenon o

34、f heavy spray paint and double component paint, wrinkling phenomenon is mainly because of the lack of new paint spraying safe and dry, can not stand the strong erosion of the solvent, resulting in softening and expansion. Therefore, we must pay attention to:(1) avoid using different kinds of paint o

35、r solvent to spray on the surface of new film.(2) if new paint film must be sprayed again, it should be given a certain drying time, or heat baked, so that the paint film is completely dry. remedies for wrinkling:. (1) if the condition is not very serious, after the paint film is completely dry, gri

36、nd the wrinkled area with sandpaper and then spray the halfway primer and finish coat. (2) shovel the bare metal surface if it is critical.10, new paint surface appears scratches and sandpaper mark treatmentThe main reason for the scratch and sanding marks on the new spray paint surface is that:(1)

37、new spray paint scratches appear to be the bottom layer of used coarse sand paper or 2K halfway primer.(2) the old paint appears on the scratch. It will cause scratches when the paint is constantly wiped and cleaned, especially in the sun. These shortcomings are sometimes the hardness of the finish

38、is not good, or wax may be immature wax polishing, failed to effectively remove coarse wax marks.The methods of prevention and remedy are:(1) after spraying the priming paint, the paint must be painted so as to remedy the defects on the paint film (such as sand mark).(2) the defects after spraying m

39、ust be polished and filled with putty to be sprayed again.11, double component paint (2K) after spraying wrinkles, film surface loss of light and other phenomenaWrinkle and the loss of light on the paint surface are mainly due to:. (1) use excessive amounts of moisture proof agent (white water). (2)

40、 incorrect use of two-component paint (2K). (3) the drying time of the paint film is not enough. (4) lack of baking temperature and time.Avoid:(1) pay attention to the moistureproof agent (white water), the paint volume has been diluted, no more than 15%.(2) the blending ratio of the two-component p

41、aint (2K) must be strictly in accordance with the formula formulated by the manufacturer.(3) if new paint film must be reworked, sufficient drying time must be given, or heating and forced drying can be applied before construction. remedies:(1) if it is a misuse of a chronic drier and thinner, it ma

42、y be warmed, dried, waxed or sprayed.(2) incorrect use of an appropriate amount of drying agent or 2K paint, or forgetting to use a drier, must be removed from the paint film and re treated.The treatment of.12 and paint tearsToo thick, two component spray painted on a vertical or oblique surface, fa

43、iled to adhere to the paint film surface, and down flowing, known as tears. The chief cause is.:(1) excessive or inappropriate use of catalysts and thinners.(2) the air pressure is too low and the paint is too high or too low to make the atomization bad and produce tears.Avoid:It is recommended that

44、 proper driers and thinners be used to match different temperatures. remedies:(1) let the paint film be dried thoroughly, then use P1500 water sand paper to polish, and then polish with IC129 wax water.(2) if the tears are serious, let the film completely dry, then wet thoroughly with P800 sandpaper

45、 and then spray again. 13, silver paint and varnish mouth repair methodThe following are the following methods for repairing and facing varnish of silver powder paint:(1) use more than P800 wet and dry abrasive paper to smooth out the halfway primer. (2) use P1200 water sanding paper to polish the p

46、rimer around 814cm. (3) polish with coarse wax in the outer ring 25cm range of the sprayed primer.(4) clean and blow dry, wipe with oil and dust cloth.(5) spray two layers of silver powder, cover the halfway primer, and spray gun pressure at 22.5Kg. (6) to reduce gun pressure 1.52kg arc spraying tec

47、hnique, a layer of more than one layer of expanded gradually homogenized, in each layer of spray before the end not to put the gun trigger to avoid Yuanyang color edge.(7) adding a volatile solvent with a volume fraction of 50% or directly applying a slower volatile solvent (commonly referred to as

48、an interfacial solvent). On the edge of the patch, thin layer of mist is sprayed, the air pressure is at 2.53Kg, and two layers are sprayed to dissolve the edge tissue. (8) dry surface. (9) spraying varnish, the range should be beyond the silver spray area, and within the ground areas gradually homo

49、genization. (10) use a slower, volatile solvent to spray the patches in the patch.(11) film drying, cooling, polishing wax.The treatment of.14 and tiny particles on the surface of the filmGenerally, the appearance of tiny particles on the surface of the film is caused by:. (1) paint or paint room ai

50、r without filtering or improper filtering.(2) spray dust is accumulated on the surface of the spray booth.(3) the dust in the gap and groove of the vehicle is not blown clean.(4) compressed air is not filtered or improperly filtered. (5) the vehicle is not cleaned with wet cloth before painting. (6)

51、 the lid of the paint jar is not tight enough to allow dust to enter.(7) dust, sludge and fiber on workers clothes. (8) paint and thinners with rusted or soiled containers. (9) the air flow in the paint booth is high and disordered.(10) improper filtration of the direct fire source, jet stream, and

52、space heating device.(11) use poor quality covering paper, such as newspaper. prevention:. (1) good arrangement and management. (2) the surface that holds up the ashes. (3) the vehicle must be thoroughly cleaned at each stage of the spraying process. remedies:(1) after the film has completely dried,

53、 wet it with P1200 sand paper and shine again by polishing. (2) leveling when the particles are deep. (Note: if the dry film surface is relatively regular small granular, there may be color paint is not completely dissolved.).15, two component silver powder paint produces mandarin duck hue treatment

54、 measuresThis phenomenon is mainly due to the precipitation of silver powder in the silver paint. Caused by the following reasons:. (1) used inferior solvents.(2) the use of improper nozzles (too large) and pressure (Tai Di).(3) excessive use of slow drying agents and thinners. (4) unsuitable sprayi

55、ng technique. prevention:(1) use the original diluent and spray in accordance with the correct construction requirements. (2) use the correct nozzle / air pressure and spray process. remedies:. After the paint film is dry, rub and spray again.16, two component paint lost light, color treatment measu

56、resThe main reason for the loss of light and color of the double component paint is that:. (1) use inferior solvents. (2) use slow dry catalyst and diluent. (3) excessive use of diluents.(4) excessive coating or viscosity (too thick).(5) use self drying primer and then spray two coat finish. remedies:(1) after drying the paint film, polish it with P1500 sand paper and then polish it with wax. (2). In serious cases, dry film, grinding heavy spray.The treatment of.17, the surface of paint film, which sometimes presents milky hazeThis phenomenon is