Spraying paint for plastic products
Short Description:
The purpose of spraying paint on the surface of plastic parts is to protect the surface from scratching, aging, heat insulation and decorative appearance
Paint spraying for plastic parts is one of the most commonly used processes.
Surface spray paint is widely used in electronics, electrical appliances, automobiles and other products and equipment.
There are three purposes for plastic parts are sprayed with paint:
(1) to protect the surface of the parts from direct contact with other objects, avoid scratches/scratches and oxidation, prolong the service life,
(2) to conceal the defect in surfaces, beautify the appearance.
(3) give the final color to the product appearance.
According to the characteristics of paint and the purpose and function of product spraying, there are main four types of spraying processes below.
1. Ordinary paint spray
Ordinary paint spraying is the most basic spraying technology. Its main function is to protect the surface of parts and prolong the service life and give the final color to the surface of parts. Ordinary paint can modulate a variety of colors to give the appearance of products.
Ordinary paint can also modulate different gloss effects to a certain extent, but to obtain better gloss. Degree and handle, also need toadd UV spray or Rubber spray on it.
2.UV spraying
UV spraying has good wear resistance, and can obtain better gloss and layer feeling than common paint spraying. It has three levels of spectrophotometry / neutrality/dumbness. UV spraying process depends on UV light curing .UV paint spray booth must be high class clean and dust-proof.
UV spraying is sometimes used as the top spraying coating on the vacuum coating or water transfer layer, which plays a protective and curing role.
3.Rubber spraying
Rubber spraying is mainly used to create a soft touch layer of rubber or leather on the surface of parts.
UV paint and Rubber paint are transparent, and their affinity with plastic materials is not good enough, so most of them need to spray a layer of base paint as a medium before spraying them, usually representing the color of the product.
4. Conductive paint
Conductive paint is a special kind of spraying. It is mainly coated with a layer of paint containing conductive metal powder in the inner cavity of the part shell to form a shielding chamber to isolate the influence of electromagnetic waves between the internal and external environment of the product.
Conductive paint is generally used in communication and communication products, which rely on high-frequency electromagnetic wave products are extremely sensitive to external electromagnetic signals. Therefore, it is necessary to spray metal paint in the shell to shield electromagnetic interference.
Ordinary paint spray-red color
Golden color paint
Highlight UV paint
Conductive paint
Quality parameters of paint spray
There are 4 important features to judge the quality of painting:
1. Adhesive force
2. Color deviation
3. Gloss and matt
4. Dust density
Regarding the quality parameter for conductive paint is conductivity.
Paint is an oily chemical. Free oil mist emitted in the air will cause damage to human lungs. In addition, in order to avoid dust falling on the surface of parts and affecting the quality, spraying workshop and production line will generally build a room isolated from the external environment, and set up a separate good ventilation, filtration and exhaust system.
Plastic painting lines
There are two kinds of spraying methods: one is manual spraying, which is used to make samples or order with small quantity; the other is automatic production line spraying, which is completed automatically by complete machine in a closed production line. Automatic production line spraying avoids manual intervention, has good dust-proof effect, high production efficiency, and at the same time. It avoids the health hazards caused by human contact.
Mestech provide one-station service of plastic parts production including plastic injection and paint spray. please feel free to contact me if you need such service.
