First, the spray characteristics

Air spraying is a widely used finishing process in paint painting construction. Air spray is a flow of compressed air, which flows through the nozzle hole of the spray gun to form a negative pressure. The negative pressure causes the paint to be sucked from the suction pipe and sprayed through the nozzle to form a paint mist. The paint spray is sprayed onto the surface of the painted component to form a uniform. Paint film. Air spray can produce a uniform paint, the coating is fine and smooth; even for the hidden parts of the parts (such as gaps, bumps), can be evenly sprayed. The coating utilization rate of this method is about 50% to 60% lower.

After the plastic parts are sprayed, the following effects can be obtained:

1. Can cover the surface defects of the formed parts;

2. It is difficult to color the plastic parts themselves, and various colors can be obtained by spraying;

3. Improve the electrostatic properties of plastic parts and reduce dust adsorption;

4. Enhance the hardness and scratch resistance of plastic parts;

5. Improve the weather resistance of plastic parts;

6. Adjust the gloss of the surface of the plastic part arbitrarily;

7. Some special paints such as sand lacquer and fluff lacquer can obtain a good appearance and feel.

In addition, the surface state of the plastic after molding has a great influence on the appearance quality. It is required that the surface after molding is smooth and uniform, and there should be no scratches, flashes, burrs, pits, spots, bubbles and obvious weld lines.

Second, the plastic spraying process: annealing and degreasing to eliminate static electricity, dusting spray drying

1. Annealing: Internal stress is easily formed during plastic molding, and the stress concentration is easy to crack after coating. Annealing or full-face treatment can be used to eliminate stress. The annealing treatment is to heat the aBS plastic molded part below the heat distortion temperature, that is, 60 ° C, and keep it for 2 h. Since the use of such a process requires a large amount of equipment investment, a full-surface treatment technique can be employed, that is, a solution capable of eliminating the internal stress of the plastic part can be subjected to a treatment of the surface of the plastic part at room temperature for 15 to 20 minutes.

2. Degreasing: The surface of plastic parts is often stained with oil, hand sweat and mold release agent, which will make the adhesion of the paint worse, and the coating will crack, blister and fall off. Degreaser treatment should be carried out before painting. The plastic parts are usually cleaned with gasoline or alcohol, and then chemically degreased. After degreasing, the residual lye on the surface of the workpiece should be thoroughly cleaned and finally cleaned, dried or dried with pure water.

3. In addition to electricity and dust: plastic products are insulators, the surface resistance is generally around 1013Ω, easy to generate static electricity. After charging, it is easy to adsorb fine dust in the air and adhere to the surface. It is very difficult to remove dust due to electrostatic adsorption by a general blowing method, and the effect of removing and discharging dust by using a high-pressure ionized air stream is good.

4. Spraying: The thickness of the plastic coating is 15~20μm, usually 2~3 times to complete. After spraying, dry for 15 minutes and then spray for the second time. A clear surface must also be applied with a clear coating. The coated parts have little effect on the flame retardant properties.

5. Drying: After coating, it can be dried at room temperature or baked at 60 °C for 30 minutes.

Here are all Vacuum cleaner power tools and the designated carbon brushes,motor brushes, electric brushes, motor brushes, electric motor brushes or simply brushes.

For each power tool, there are usually two carbon brushes to choose from: With automatic stop and without automatic stop. Carbon brushes with automatic stop have a spring through the length of the carbon brush. When the carbon brush wears out, the spring gets released, the current to the carbon brush gets interrupted and your power tools switches off at once. The advantage: No additional wear and tear to your power tool. Carbon brushes without automatic stop do not stop functioning at once, but performance of your power tool will detoriate rapidly. Although handy as a warning sign, this usually isn't very beneficial to your power tool.

If you can't find your Vacuum cleaner power tool here, please contact us: Most likely we can help!

Vacuum Cleaner Carbon Brush

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