The process and equipment of door coating production line

The process and equipment of a door coating production line mainly include the following aspects:

I. Process Flow of Door Coating Production Line

1. Pre - treatment Process

   • Pre - degreasing: To remove oil, dust, and other impurities from the surface of the workpiece.

   • Degreasing: Further cleaning the surface of the workpiece with a degreaser to remove grease.

   • Water Washing: Multiple water washes to remove residual degreaser from the surface.

   • Surface Adjustment: Adjusting the surface condition of the workpiece to prepare for phosphating.

   • Phosphating: Forming a uniform phosphate film to enhance the adhesion and corrosion resistance of the coating.

   • Deionized Water Washing: Using deionized water to further clean the workpiece and ensure surface cleanliness.

   • Drying: Removing moisture from the workpiece surface to prevent it from affecting the subsequent spraying effect.

2. Spraying Process

   • Primer Spraying: Spraying primer to enhance the adhesion and corrosion resistance of the coating.

   • Topcoat Spraying: Spraying topcoat according to the required color and type.

   • Clear Coat Spraying: Spraying clear coat to increase surface gloss and protective properties.

3. Curing Process

   • Baking: The sprayed door is sent into the baking oven, where the coating is cured at high temperature.

   • Cooling: The door is cooled in the cooling area after curing to bring it to a temperature that can be handled.

II. Equipment Composition of Door Coating Production Line

1. Pre - treatment Equipment

   • Spray Treatment Tank: Used for spray pre - treatment processes, such as degreasing, phosphating, and water washing.

   • Blasting Machine: Suitable for steel parts with simple structure, severe rust, and little or no oil.

2. Spraying Equipment

   • Automatic Spray Painting Machine: For example, the wooden door spray painting machine adopts fully automatic numerical control with five axes plus half - axis compensation, equipped with imported air spray guns, and can achieve automatic recognition, spray painting, and flipping processes.

   • Water - curtain Spray Booth: Used for the treatment of exhaust gas during the spraying process to reduce pollution.

3. Drying Equipment

   • Drying Oven: Used for curing the coating. The heating method can be radiation, hot air circulation, or a combination of radiation and hot air circulation.

4. Conveying Equipment

   • Suspended Conveying Chain: Used for the automatic conveying of workpieces between various processing stations.

5. Auxiliary Equipment

   • Exhaust Gas Treatment System: Used for treating the exhaust gas generated during the spraying process to ensure compliance with environmental protection standards.

   • Wastewater Treatment System: Treats the wastewater generated during the pre - treatment process to prevent environmental pollution.

The process and equipment configuration of a door coating production line will be adjusted according to specific production requirements and the material of the door to achieve the best coating effect and production efficiency.