汽車油漆補(bǔ)灰技巧Automobilepaintrepairingtechnique

1、汽車油漆補(bǔ)灰技巧( Automobile paint repairing technique )1, prevent the edge of atomic ash low dent skillsOneof 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 o

2、f the coating workpiece smooth.Methods: two in spray paint, nitro first scraping putty inputty 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 nee

3、d 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 foll

4、ows: (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 drying

5、 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 tru

6、ly 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 long, t

7、he 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) preve

8、ntion 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 quality b

9、rand.(.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, butalso with the shovel shovel moving film, can use "conser

10、vative 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 notbe used under this condition. a film on th

11、e loose. 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 stan

12、dard coating sample 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

13、color will be used and adjust the "hue" and "lightness" 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

14、 economical color pigment preparation with Qidai.(3) first, after a small sample, a large 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 foundat

15、ion for waste reduction.(4) the modulation steps and measures should be in strict accordance with the principle of "first master, second time, and crude sequence". Whenmixing, they should be fully stirred and dissolved evenly.(5) auxiliary materials should be added in accordance with the s

16、trict proportion to adapt to the variety, when the deployment of timely and appropriate amount of 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 to

17、o close and not too deep. Should be slightly shallower than the primary color, so that after the dry paint will be the sameplate 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 th

18、e finish coat, sometimes the putty print appears. The main reasons are as follows: . (1) using atomic 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 or

19、der to avoid the putty print due to the above reasons, we should pay attention to the following points in advance:(1) must use high quality putty (putty), can avoid putty printing and light defects. (2) use high quality, two component mediumcoat primer and coat primer with proper number of layers (3

20、 layers).(3) the formula that should be provided by a licensed manufacturing plant. Pay attention 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 prin

21、t, the following measures can be taken:(1) can be polished with P1500 sand paper, and then repaired 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 contamina

22、ted with waxes, silicides, grease, or lubricating oils.(2) no oil and water separator is added to 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 phenome

23、non of advance should payattention to the following points:(1) before spraying, use the degreasing 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 w

24、ater cleaning solutions.(3) if the old paint is found to have solvent foam defects, it should be 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 f

25、ilm is sanded with P8000 sand paper and sprayed again; (2) if the micropyle is serious, until 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 cau

26、se of wrinkles in orange peel:. (1) use bad solvents. (2) use improper nozzles (too large) and 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 pain

27、t film is dry, use P1500 sand paper to polish it and then recover it with wax process. (2) when conditions are serious, re spray after grinding.Notes on.7 and the use of two-component paint Two component low temperature baking finish (2K) uses a small amount of reactive isocyanate curing agent, whic

28、h can infect the respiratory system and cause potential harm. In use, if the bank will strictly 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 exh

29、aust equipment.(2) continuous use of a two-component paint containing isocyanate requires the use 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 standar

30、d requirements for the protection of isocyanates shall not be used to protect against the chemical 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 tr

31、eatment of.8 and double component paint resulting in poor dryingIn order to meet the requirements 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 necess

32、ary to comply with the recommended dilution ratio of the paint manufacturer and use suitable driers 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,

33、 then polish it with IC19 wax water to give the original luster. (2) if it is re sprayed by P800wet 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 re

34、process.9, treatment measures to re spray paint and two-component paint wrinkling phenomenon of heavy spray paint and double component paint, wrinkling phenomenonis mainly because of the lack of newpaint spraying safe and dry, can not stand the strong erosion of the solvent, resulting in softening a

35、nd expansion.Therefore, we must pay attention to:(1) avoid using different kinds of paint or 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 wrinkl

36、ing:. (1) if the condition is not very serious, after the paintfilm is completely dry, grind 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

37、 main reason for the scratch and sanding marks on the new spray paint surface is that:(1) 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 cl

38、eaned, especially in the sun. These shortcomings are sometimes the hardness of the finish 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

39、 remedy the defects on the paint film (such as sandmark).(2) the defects after spraying must 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

40、 are mainly due to:. (1) use excessive amounts of moisture proof agent (white water). (2) 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 pain

41、t volume has been diluted, no more than 15%.(2) the blending ratio of the two-component paint (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 appliedb

42、efore construction. remedies:(1) if it is a misuse of a chronic drier and thinner, it may be warmed, dried, waxed or sprayed.(2) incorrect use of an appropriate amount of drying agent or2K paint, or forgetting to use a drier, must be removed from the paint film and re treated.The treatment of.12 and

43、 paint tearsToo thick, two component spray painted on a vertical or oblique surface, failed 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 hig

44、h or too low to make the atomization bad and produce tears.Avoid:It is recommended that 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

45、tears are serious, let the film completely dry, then wet thoroughly with P800 sandpaper 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 pa

46、per to smooth out the halfway primer. (2) use P1200 water sanding paper to polish the primer 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 prime

47、r, and spray gun pressure at 22.5Kg. (6) to reduce gun pressure 1.52kg arc spraying technique, 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 solventwith a volume fr

48、action of50%ordirectly applying a slower volatile solvent (commonly referredto as 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

49、should be beyond the silver spray area, and within the ground areas gradually homogenization. (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 t

50、iny particles on the surface of the film is caused by: (1) paint or paint room air 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 improp

51、erly filtered. (5) the vehicle is not cleaned with wet cloth before painting. (6) 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 hi

52、gh and disordered.(10) improper filtration of the direct fire source, jet stream, and 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

53、 each stage of the spraying process. remedies:(1) after the film has completely dried, wet it with P1200 sand paper and shine again by polishing. (2) leveling whenthe particles are deep. (Note: if the dry film surface is relatively regular small granular, there may be color paint is not completely d

54、issolved.).15, two component silver powder paint produces "mandarin duck" hue treatment 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)

55、and pressure (Tai Di).(3) excessive use of slow drying agents and thinners. (4) unsuitable spraying 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 th

56、e paint film is dry, rub and spray again.16, two component paint lost light, color treatment measuresThe 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 c

57、oating 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, whic

58、h sometimes presents milky hazeThis phenomenon is due to the condensation of water vapor and trapping in the wet paint film. The main reason is that: (1) the weather is cold and damp when spraying paint.(2) the thinner used is too fast or too poor in quality.(3) the pressure of the compressed air is too great, and the spray gun is improperly adjusted.(4) use compressed air to blow the paint film in an attempt to accelerate solve