Powder coating surface treatment is a technique that involves spraying solid powder pigments onto the surface of workpieces through a spray gun and then curing them in a high-temperature environment to form a uniform coating. The main feature of this process is that it does not require organic solvents, is environmentally friendly and low-cost, and is widely used in industries such as automobiles, electronics and machinery. The pretreatment process of powder coating is of great significance and directly affects the quality of the coating. Common pretreatment methods include degreasing, rust removal and phosphating, etc. Powder coating is also widely used in industries such as furniture, metals and ceramics, and can create unique textures and colors
| Surface preparation | Colors* | Glossiness | Cosmetic availability | Thickness | Visual appearance |
| As machined (Ra 3.2μm / Ra 126uin) | White, Black, RAL and Pantone | Glossy (Above 70 GU) | No | 50um to 150μm | Parts are powder coated directly after machining. |
| As machined (Ra 3.2μm / Ra 126uin) | White, Black, RAL and Pantone | Matte(Below 30 GU) | No | 50μm to 150μm | Parts are powder coated directly after machining. |
Advertising machine casing
Air purifier air duct
LED light box
Multimedia shell
Industrial aluminum chassis
PDU chassis
Powder coating is a process that utilizes the phenomenon of corona discharge to adsorb powder coatings onto workpieces. The process of powder spraying is: The powder spraying gun is connected to the negative pole, and the workpiece is grounded (to the positive pole). The powder coating is sent into the spray gun by the powder supply system through compressed air gas. At the front end of the spray gun, there is a high voltage generated by a high-voltage electrostatic generator. Due to the discharge of the corona, a dense charge is produced near it. When the powder is sprayed out from the gun nozzle, a circuit is formed to create charged coating particles, which are subject to the electrostatic force. It is attracted to the workpiece with the opposite polarity. As the amount of powder sprayed increases, the accumulated charge also grows. When it reaches a certain thickness, due to the electrostatic repulsion, it no longer adheres, thus obtaining a certain thickness of powder coating on the entire workpiece. Then, after being heated to melt, level and solidify the powder, a hard coating film is formed on the surface of the workpiece.
It is called powder coating and is a new type of surface coating process, mainly using plastic powder. Its basic processes include:
1. Surface preparation: Clean the object to be coated to remove oil stains and impurities.
2. Powder preparation: Select appropriate powder materials and blend them into a mixture suitable for powder spraying.
3. Powder spraying operation: Use a powder spraying gun to evenly spray the powder onto the surface of the object.
4. Baking and curing: The sprayed object is placed in a drying oven for high-temperature baking to cure the coating.
5. The powder coating process has the advantages of being environmentally friendly, having uniform coating and strong adhesion, and is widely used in surface treatment of metals, woods, etc
Powdering uses the phenomenon of corona discharge to make powder coating adsorb on the workpiece. The process of powder spraying is: the powder spraying gun is connected to the negative electrode, the workpiece is connected to the ground (positive electrode), and the powder coating is sent to the spray gun by the powder supply system through compressed air gas, and a high voltage generated by a high-voltage electrostatic generator is added to the front end of the spray gun. Due to corona discharge, dense charges are generated near it. When the powder is sprayed from the gun nozzle, a circuit forms charged paint particles. It is subject to the action of electrostatic force and is absorbed onto the workpiece with the opposite polarity. As the powder sprayed increases, the charge accumulates more. When the thickness reaches a certain thickness, due to the electrostatic repulsion, it does not continue to adsorption, so that the entire workpiece can obtain a powder coating of a certain thickness, and then the powder is melted, leveled, and solidified by heat, that is, a hard coating film is formed on the surface of the workpiece.
Spray painting, sandblasting and powder coating are three common surface treatment processes, which are widely used in furniture and home appliances, automobiles, machinery and other industries.
After the CNC is processed, it generally needs to be surface-treated to enhance certain features of the parts, such as functionality, corrosion resistance, or brightly colored appearance;
Common surface treatment processes for CNC machining parts:
Anodizing
Electroplating Normal plating Galvanized Tin plating Copper plating Nickel plating Chrome blue/black Phosphate Passivation
Sandblasting
Powder spraying
polishing
Silk printing
Laser marking
Brushed
Paint, etc.
We usually define surface treatment requirements based on different material properties.