CHG International Limited
Your Trusted Partner in the Metal Surface Treatment Industry
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This powder coating production line sprays sheet metal parts of different sizes and shapes for the electric control cabinet chassis.
The material of the spray booth is PP, and the spraying method combines automatic gun spraying and additional manual coating, and adopts a monorail overhead conveyor system.
Production line flow: hanger stop → elevator down, assists manual hanging → pre-spray treatment (workpiece stepping, and stop spraying and cleaning at each station respectively) → moisture drying (workpiece accumulation) → pass through the manual spray room ( Workpiece stops, manual spraying) → through the automatic spray booth (the workpiece runs continuously, the speed is 1.0-1.5m/min, automatic spraying + manual spraying) → powder solidification (the workpiece is accumulated obliquely) → → natural cooling (the workpiece stops) → Transport to the assembly area → the elevator descends to assist manual picking (the workpiece stops)
The Process of Powder Coating Line:
| 1. Surface Preparation: | The first step in the powder coating line is the surface preparation of the aluminum profiles. This stage is essential to ensure proper adhesion of the powder coating. Surface preparation may include cleaning, degreasing, and removing any contaminants from the aluminum surfaces. |
| 2. Pre-Treatment: | After surface preparation, the aluminum profiles undergo a pre-treatment process to enhance coating adhesion and corrosion resistance. Common pre-treatment methods include chemical cleaning, phosphating, or chromate conversion coating. The pre-treatment prepares the aluminum surface for better powder adhesion and improves coating performance. |
| 3. Drying: | Once the pre-treatment is completed, the aluminum profiles are passed through drying ovens to remove any remaining moisture from the surface. Dry aluminum surfaces are crucial for proper powder coating adhesion and finish. |
| 4. Powder Coating Application: | The dried aluminum profiles are then ready for powder coating application. The powder coating material is electrostatically charged and sprayed onto the aluminum profiles using powder coating guns. The positively charged powder particles are attracted to the grounded aluminum profiles, adhering to the surface uniformly. |
| 5. Powder Curing: | After powder coating application, the aluminum profiles are transferred to curing ovens. In the curing ovens, the powder coating undergoes a thermal curing process. The oven's heat causes the powder particles to melt and flow, creating a continuous, smooth coating film. The curing process also chemically cross-links the powder particles, ensuring a durable and hardened finish. |
| 6. Cooling: | Following the curing process, the coated aluminum profiles are allowed to cool down. This cooling phase stabilizes the coating and ensures it maintains its properties and appearance. |
| 7. Quality Inspection: | After cooling, the coated aluminum profiles undergo a thorough quality inspection. The inspection involves checking the coating thickness, appearance, adhesion, and overall quality to ensure it meets the specified standards. |
