What are the paint spraying processes? How to make the spraying process more worry free?

Paint spraying process: white stubble surface treatment, if there is dust, stains, glue marks, pencil tracks, etc., the surface of the home improvement carpenter that needs to be decorated must be treated, and the steam nail cap exposed on the surface should be washed into the surface of the home improvement carpentry 1-2. Brush the topcoat:

When brushing the topcoat, attention should be paid to the preparation of the topcoat concentration value. When brushing, follow the wood texture from top to bottom, from left to right evenly brush twice, prevent oil from hanging when brushing, and brush the top coat four times. Powder, putty powder is based on the color of the wood veneer panel by Lide powder, water color paste water mixture, putty when playing putty powder to wipe full and highlight the surface of home decoration woodwork, as the capacity of dry shrinkage brush.

Milling grinding and polishing: After the putty powder is dry, use No. 360 polishing sandpaper to carry out milling edge grinding and polishing, and use uniform force during operation.

Before spraying paint, the site will be cleaned, sprinkled with water and sprinkled on the ground to ensure that the air is dust-free, and the topcoat should be considered before spraying paint. Before spraying paint, the topcoat surface should be polished with No. 360 polishing sandpaper dipped in soap liquid, and the paint should be sprayed twice, and the distance between the paint gun and the control panel should be moderate to prevent the mist from sticking to the control panel. Spray paint to do a good job of wall maintenance, at the same time to open the windows and doors for natural ventilation, and prohibit the use of fire on the spot.

After the paint is sprayed, the surface layer of the paint layer should be flat and smooth, mild to the touch, consistent in color, no sagging, no skin wrinkles. After the paint is sprayed, the butt between the paint and other positions should be clear and conspicuous, and the flute angle should be clear. After the paint is sprayed, the dripping and environmental pollution walls, sheds, pavements, and balconies should be quickly cleaned.

The spraying process is more worry-free: adjusting the sample is a necessary process before the color, first determine how many colors of the subvarnish are contained in the paint sample, calculate the color types that participate in the color matching, and then adjust the secondary colors and secondary colors in the small utensils. The main varnish is the color paint that is used in a large amount in use, but the color amount is small, and the secondary color paint with strong color strength is added to the main varnish, stirred evenly, compared with the sample and the color palette, step by step, and inquire anytime and anywhere until the actual effect is satisfactory.

For example, with light yellow paint, you should first add an appropriate amount of white paint, gradually add light yellow paint, and continue to mix until you achieve the desired shade.

The wall needs to be sanded, then leveled, sanded again, primed, sanded again, sprayed again, and the spraying process needs to choose the right color according to your preferences.

It is necessary to pay attention to sanding, you need to scrape the ash, and then spray some transparent primer, sand, and then spray the paint, and the toning is generally carried out by a fixed machine, so that you can better choose the right color.

1. Roller coating;

Roller coating is to use the roller as the carrier of the coating, the coating forms a certain thickness of wet film on the surface of the roller, and then the paint is applied to the surface of the coated object with the help of the roller in contact with the coated object during the rotation process. Roller coating is suitable for flat coated objects, and is widely used in the coating of metal sheets, plywood, cloth and paper, especially for metal coil coating.

2. Air spraying (spray gun plus compressed air);

Air spraying is a coating process that is widely used in paint coating construction. Air spraying is the use of compressed air flow, flowing through the nozzle hole of the spray gun to form negative pressure, negative pressure makes the paint sucked in from the straw, sprayed out through the nozzle, forming a paint mist, and the paint mist is sprayed onto the surface of the coated parts to form a uniform paint film.

3. Electrostatic spraying.

Electrostatic spraying is a spraying method that uses a high-voltage electrostatic electric field to orient the negatively charged paint particles in the opposite direction of the electric field and adsorb the paint particles on the surface of the workpiece. Electrostatic spraying equipment consists of spray guns, spray cups and electrostatic spraying high-voltage power supplies.

4. Electrophoresis spraying.

Electro-coating is a coating method that uses an applied electric field to orientally migrate particles such as pigments and resins suspended in the electrophoresis solution and deposit them on the substrate surface of one of the electrodes. The principle of electrophoretic coating was invented at the end of the 30s of the 20th century, but the development of this technology and industrial application was after 1963, and electrophoretic coating is a special coating film formation method developed in the past 30 years, and it is the construction process with the most practical significance for water-based coatings. It has the characteristics of water-soluble, non-toxic, easy automatic control, etc., and has been widely used in automobiles, building materials, hardware, home appliances and other industries.

5. High-pressure airless spraying.

Also known as airless spraying, it refers to the use of a high-pressure plunger pump to directly pressurize the paint to form a high-pressure paint, and spray out the muzzle to form an atomized air flow on the surface of the object (wall or wood). Compared with air spraying, the paint surface is uniform and grainy. Due to its isolation from the air, the paint is dry and clean.

Airless spraying can be used for the application of high-viscosity paints with sharp edges, and can even be used for some spraying projects with boundary requirements. According to the type of machinery, it is also divided into pneumatic airless sprayers, electric airless sprayers, internal combustion airless sprayers, etc.

Hello 1

One bottom and one side. The process is the simplest, the coating cost is the lowest, in the case of the wood blank has obvious defects, fill with wood color water ash, and spray the colored transparent surface with a darker color, which can better cover the defects of the substrate, and the color is unified.

2.Two bottoms and one side. The process is relatively simple, the coating cost is low, and it has better filling and anti-sag than the previous process.

3.Three bottoms and one side. It has good permeability and can clearly express the natural grain of the wood. The construction of water cement is omitted, and the strength of grinding is reduced.

We usually divide into 3 steps for car sheet metal painting.

1 primer.

Fill the sand marks and micropores at the bottom of the workpiece, increase the adhesion of the underlying coating, and also have the effect of defect indication.

2 Primer.

It is very important to prepare a complete and smooth working surface for the topcoat, complete the last process of all primer work, increase the adhesion of the intervening layer and have a certain isolation effect, so as to ensure the quality stability of the topcoat.

3 Topcoats. The topcoat is divided into single-layer paint and multi-layer paint, which is the color determination layer and decorative protective layer, and the single-layer paint is commonly known as plain paint, also known as ordinary paint, which can be completed in one layer. Multi-layer paint is divided into silver powder series paint and pearl series paint, divided into double-layer and multi-layer construction process to complete the coating, silver powder paint is made of special aluminum materials, with high protection and outdoor stability and strong observability, pearl series paint is made of mica sheet and shell and other materials through high-tech extraction, is a high-grade paint with rich color and strong decoration.

The spraying quality of the topcoat part is very demanding, to be clean, plump, bright, not hanging, not hanging, uniform gloss, no leakage, no gun, good leveling, no bottoming, not impetuous, not color cast, these all aspects are in place, it is indeed not an easy task to do it in one go, and it requires extremely rich experience and fault pre-arrangement ability.

Spraying process: spraying primer, topcoat, overshadowing varnish, baking (180-250) quality inspection.

The standard is based on the American Building and Manufacturing Association.

The multi-layer spraying process is sprayed in three times (referred to as three sprays), spraying the base coat, top coat and overprint paint and secondary spraying (primer, top coat).

Specifically, there are the following steps:

primer coating; topcoat coating;

overprint coating;

curing treatment; Quality inspection.

Extended spraying. Spraying is a coating method that disperses into uniform and fine droplets with the help of pressure or centrifugal force through a spray gun or disc atomizer and applies it to the surface of the coated object. It can be divided into air spraying, airless spraying, electrostatic spraying and various derivative methods of the above basic spraying forms, such as high-flow and low-pressure atomization spraying, thermal spraying, automatic spraying, multi-group spraying, etc.