The oil injection process is a kind of surface coating processing for industrial products. The process of oil injection is generally suitable for plastic oil injection, silk-screen printing and transfer printing. It is necessary to test the quality of the products such as high temperature, friction, ultraviolet, alcohol and gasoline. Let’s get together. What are the specific processing steps for the oil injection process?
The internal stress is easy to form when the plastic is formed, and the stress concentration at the post-coating is easy to crack. The stress can be eliminated by annealing or surface treatment. The annealing treatment is to heat the ABS plastic molding to the temperature below the thermal deformation temperature, i.e., 60.degree. C., for 2 hours. Due to the adoption of the technology, a large amount of equipment investment is required, therefore, the whole surface treatment technology can be adopted, namely, the solution capable of eliminating the internal stress of the plastic part can be treated at room temperature for 15 to 20 minutes;
The surface of the plastic part is often stained with oil, hand and release agent, which can make the adhesion of the coating to be poor, and the coating can crack, bubble and fall off. The oil removal treatment shall be carried out before painting. the plastic part is usually cleaned with gasoline or alcohol, and then the residual alkali liquor on the surface of the workpiece should be thoroughly cleaned after the chemical deoiling chemical degreasing is carried out, and the pure water is finally cleaned, dried or dried;
Electricity removal and dust removal
The plastic product is an insulator, and the surface resistance is generally above 12 power of 10 and is a good insulator, but it is easy to generate static electricity. And the fine dust in the air can be easily absorbed after being charged to adhere to the surface. because the electrostatic adsorption dust is difficult to remove by the general air blowing method, the high-pressure ionized air flow is adopted, and the effect of the electric dust removal is better;
The thickness of plastic coating is 15 ~ 20 μ m, which can only be completed by spraying 2 or 3 channels. Dry for 15 minutes after a spray, and then spray for the second time. A bright surface must also be sprayed with transparent paint. The coated parts have no effect on the flame retardancy.
dry beside or over a fire
Generally, the paint is baked at 150 ℃ for 20 min or so. The plastic paint is baked at 60 ℃ for about 30 minutes. Some special paints can dry themselves under the greenhouse.
The oil injection process can make the monotonous product look more beautiful after the various colors are sprayed, and meanwhile, the service life and the service life of the product can be prolonged by the protection of a plurality of layers.