1. Before spraying, it is necessary to check whether the spraying air pressure is normal and ensure that the filtration system is clean;
2. Check the air compressor and water-dust separator in the paint room to keep the paint hose clean.
3, spray gun, spray hose and paint mixing tank should be stored in a clean place;
4. Except for dust removal with spray gun and sticky dust cloth, all other pre-spraying procedures should be completed outside the painting room;
5. In the painting room, only spraying and baking processes can be carried out, and only vehicles can open the door of the painting room. When you open the door, you must start the air circulation system during spraying to generate positive pressure to ensure that outdoor dust cannot enter the room;
6. You must wear designated spray-painting clothes and safety protection equipment to enter the spray-painting room for operation;
7. When baking, flammable items in the painting room must be taken out of the room;
8. Non-essential personnel are not allowed to enter the spray booth.
2. Knowledge conditions for opening a automotive sheet metal spray paint factory.
A, sheet metal correction:
This is the preliminary plastic work for painting automotive sheet metal. We compare it to the human body, and the perfect human body is like the body of a model. Metaphorically, a luxurious fashion, if worn by a person with a broken limb, is nothing and eclipsed. Then if you let a fashion model wear it, it will look dazzling and noble. Very simple, how can a twisted car body set off the brilliance of paint? Many painters think that sheet metal is not their job, I don't think so.
Second, scraping ash:
After the automobile body is corrected by sheet metal, there are still some defects that can't be made up by sheet metal work. Even if new parts are replaced, there will be imperfections. In order to be more perfect and accurate, we must make up for the defects through sculpture technology. After the car is damaged due to deformation and other reasons, its flatness, wheel angle and lines need to be scraped and polished. This formula shows that scraping = restoring body skin = die product = die processing program. Any car body skin is stamped with a mold, and we repair the car body skin just like repairing the mold, so our scraping molding process should be connected with the mold processing, which is impossible for ordinary painters. Many painters who have worked for many years will sigh that it is easy to spray a car well, but it is difficult to do a good job, and it is difficult to grind a ball of ash in ten years. The person who said this may really understand what car painting is.
Third, automotive sheet metal painting: automotive sheet metal painting is usually divided into three steps.
<1> Primer: it fills sand marks and micropores at the bottom of the workpiece, increases the adhesion of the lower coating, and has the function of defect indication.
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< 3 > topcoat: topcoat is divided into single-layer paint and multi-layer paint, which is the color fixing layer and decorative protective layer. Single-layer paint is commonly known as plain paint, also known as ordinary paint, and can be completed in one layer. Multi-layer paints are divided into silver powder series paints and pearlescent series paints, which are completed in two-layer and multi-layer construction procedures. Silver powder paint adopts special aluminum material, which has high protection, strong outdoor stability and strong observability. Pearl series paint is made of mica and shells through high technology, which is a kind of high-grade paint with rich colors and strong decoration.
The spraying quality of topcoat is very high. It is not easy to be clean, plump, bright, not sagging, not hanging flowers, uniform luster, not leaking flowers, not flashing flowers, good leveling, not biting, not impetuous, not color cast. It's really not easy to accomplish these things in one go, which requires extremely rich experience and troubleshooting ability.
Four, the body panel painting paint surface treatment:
As the name implies, it is the last process of topcoat. After the paint surface is dried and solidified, the defects on it are treated. If we try our best, some imperfections will flow out, and then we can only remedy them later. In fact, the satisfactory paint surface is not perfect. For example, the loading paints of Mercedes-Benz and BMW will have slight fine scales. We generally call it orange peel phenomenon, which is a natural phenomenon caused by the drying time difference of paint film during leveling. Of course, it is difficult for ordinary people to detect it, and it can only be discovered if they have the level of expert appreciation. So if you want to fool the eyes of experts, you have to paint them, which we call "mirror treatment". First, use 1500-2000 mesh beauty sandpaper for leveling and polishing, and then use coarse wax composed of pumice or clay to polish to remove the traces of sandpaper. Next, polish with fine wax to remove traces of coarse wax, then use reducing agent to achieve perfect luster, and then use mirror treatment agent to completely remove ring lines and scratches. At this time, it can be achieved with paint.
3. What should I pay attention to when drawing and painting?
Sheet metal is almost non-toxic, and the toxicity lies in paint.
Thinner is the most toxic component in paint;
Diluent, that is, Tianna water mentioned by the above comrades, or other epoxy diluents, mainly contains toluene, xylene, and other components that are toxic to the nervous system, liver, kidney and brain. Now you must wear a protective mask when painting cars, and there should be good ventilation at the painting site. Otherwise, the poison to the human body is still quite great.
Common sense of toxicity safety
Most paints and coatings have certain toxicity, so we must pay attention to safety protection in coating construction.
(1) It is forbidden to spray paint into the mouth and eyes. If there is any problem, it must be washed with water and sent to hospital for treatment.
(2) It is forbidden to drink water or eat at the painting construction site;
(3) ensure air circulation and prevent solvent vapor from gathering;
(4) If you inhale a large amount of solvent vapor and feel uncomfortable, you must leave the scene quickly and breathe fresh air. After the symptoms disappear, the construction can be resumed.
I hope it helps you.
4. What should I pay attention to when painting in automotive sheet metal?
The first is to purify the construction site.
Before painting the car, the construction site must be inspected to keep the floor clean and the walls clean. If it is an open-air construction site, the ground should be sprinkled with water to avoid the situation that the gloss and weatherability of the paint film are affected by the invasion of external wind and dust during construction.
Second clean construction tool
Check the surface quality and cleanliness before painting. Tools used in construction before painting, such as brushes, spray guns, paint mixing barrels, mixers, etc. Must be kept highly clean and not contaminated by oil, dust, water and old paint. The surface quality of automobile before painting must meet the specified technical standard: complete vehicle table.
Third, choose a matching paint material.
When checking the quality of paint materials and selecting supporting materials for automobile painting, we should consider from many aspects: after the automobile product is completed, most of the working time is outdoors, and the automobile paint layer should be highly protective and decorative. Therefore, it is necessary to choose those with high hardness, high luster, bright color, good weather resistance, hot and humid resistance, salt spray resistance and mildew resistance. The choice of matching system should be different according to the main requirements of painting purpose. The matching requirements of various coatings are different, and the following two conditions must be met when considering: ① there should be good adhesion between primer and topcoat; ② There should be compatibility between primer and topcoat.
Fourth, prepare color paint and paint mixing.
If color matching is needed before dilution and filtration construction, a small number of samples should be tested first. After reaching the standard color sample, it should be expanded according to the proportion of trial adjustment, and the gap between wet sample and dry sample should be grasped by experience.
The fifth layer of shielding protection
When painting cars, most paint materials contain various volatile solvents harmful to human body. When the vapor of these solvents is in high concentration, it will cause serious damage to human nerves and easily cause poisoning. Therefore, the workplace must have good ventilation, lighting, dust removal and gas protection equipment, and wear all kinds of protective equipment, such as work clothes, gloves, masks or gas masks and protective glasses.
5. Standardized management of car body panel repair and painting workshop in automobile 4S shop
Maintain the operating system:
65438+ Those who do not obey the distribution will be demoted, put on probation, suspended, transferred and dismissed, and 200 yuan will be punished every time. Anyone who refuses to obey the distribution for the third time within one year will be dismissed.
2. After receiving the work card, you should first look at the work content and the required completion time to confirm whether it can be completed on time. If it can't be finished on time, please ask the front desk to pick up the plane or the dispatcher and supervisor to extend the operation time in time. At the same time, confirm whether the appearance and content of the vehicle are consistent with the instructions on the inquiry form. If there is anything not indicated in the inquiry form, it should be confirmed with the front desk staff or workshop management immediately, otherwise the relevant personnel or team will take full responsibility for the problems.
3. After the last working procedure is completed, each professional team or personnel shall submit the work card, consultation sheet and attendance card to the next working procedure in time, and remind the next working procedure to confirm the vehicle appearance, articles, etc. After the next process is confirmed, the receiving time should be indicated on the work card and time card and signed. If the next working procedure is not delivered in time after completion, it will be punished as overtime completion. For those who fail to go through the handover procedures as required and fail to deliver the car on time, both processes will be punished as overtime completion. If there is a problem with the exterior and interior appearance of the vehicle, both processes should bear the responsibility. 20 yuan will be punished every time he loses his work card, consultation form or attendance card.
4. All vehicles entering the factory should use CS parts and work in strict accordance with the requirements of this specification, so that tools, parts, oil and water do not fall to the ground and sundries are not thrown anywhere. If you accidentally wet the floor with oil and water, clean it up in time. The replaced cores after the completion of the operation shall be put into the core library in time, and shall not be put in the workstation. Every time the offender is punished, 20 yuan.