Plastic spraying process of plastic garbage bin

Release time：2025-07-25    Click：75

　　1. Pretreatment

　　The purpose is to remove the oil, dust and rust on the workpiece surface, and generate a phosphating layer which is corrosion-resistant and can increase the adhesion of the sprayed coating on the workpiece surface.

　　Main process steps: oil removal, rust removal, phosphating and passivation.

　　After pretreatment, not only the surface of the workpiece is free of oil, rust and dust, but also a uniform and rough gray phosphating film which is not easy to rust is generated on the original silver white shiny surface, which can not only prevent rust, but also increase the adhesion of the plastic spraying layer of the plastic garbage bin.

　　2. Electrostatic spraying

　　The purpose is to evenly spray powder coating on the surface of workpieces. Special workpieces including positions prone to electrostatic shielding should be sprayed by high-performance electrostatic spraying machine.

　　Process steps: using the principle of electrostatic adsorption, spray a layer of powder coating evenly on the surface of the workpiece. The falling powder is recovered through the recovery system and can be reused after screening.

　　3. High temperature curing

　　The purpose is to heat the powder coating on the surface of plastic garbage bin to the specified temperature and keep it warm for corresponding time to melt, level and cure it, so as to obtain the desired surface effect of the workpiece.

　　Process steps: push the sprayed workpiece into the curing furnace, heat it to the predetermined temperature, generally 185 degrees, and keep it warm for corresponding time about 15 minutes; Open the furnace, take out and cool to get the finished product.

　　4. Decoration treatment

　　The purpose is to make the workpiece after electrostatic spraying achieve a special appearance effect, such as various wood grain, pattern, brightening and so on.

　　Process steps: shading; Transfer printing and other treatment processes.

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