Office Chair Spray Coating Processing

Office chair spray coating processing is a crucial step in furniture manufacturing, involving the coating treatment of the surface of office chairs, which directly affects the product's appearance, durability, and environmental performance. The process can be divided into three stages: pre-treatment, spray coating application, and post-treatment, with technical highlights and industry practices for each stage as follows:

I. Core Process Flow

1. Pre-treatment: The workpiece surface is cleaned through steps such as degreasing, descaling, and deburring. If necessary, phosphating or passivation treatment is performed to enhance the adhesion of the coating. Inadequate treatment can easily lead to coating peeling or blistering. For example, Yangzhou Aobao Metal Products Co., Ltd. ensures that the surface of the cold-rolled steel substrate is free of impurities before applying powder coating. Its salt spray test reaches 480 hours without red rust, and the coating adhesion reaches Class 0 (GB/T 9286-1998).
2. Spray Coating Application: The process is selected based on the material and shape. Air spraying is suitable for complex components, offering good atomization effects; high-pressure airless spraying is efficient and suitable for flat components; electrostatic spraying utilizes the principle of electrostatic adsorption to uniformly cover metal frames with coating. Shenyang Yuhong Minfa Furniture Fittings Factory excels in electrostatic spraying, providing various finishes such as matte and sand texture, with a sampling period of only three working days.
3. Post-treatment: This includes leveling, drying, and curing. After spraying, the workpiece needs to be left in a dust-free environment to eliminate defects such as orange peel and sagging, followed by curing the coating through hot air circulation, infrared radiation, or ultraviolet light. Zhejiang Shangbo Office Equipment Co., Ltd. uses an epoxy resin + polyester hybrid powder coating, which exhibits stable moisture resistance after curing and is suitable for high-humidity coastal areas.

II. Environmental Protection and Quality Control
Volatile organic compounds (VOCs) in coatings are the primary pollutants, and legitimate factories need to be equipped with exhaust gas treatment systems (such as water curtain spray booths and activated carbon adsorption devices). In recent years, water-based paints and powder coatings have become the direction for industry upgrades due to their low content of harmful substances. For example, Changzhou Haoli Coating Co., Ltd. adopts a low-temperature curing process, controlling the deformation rate of aluminum alloy frames within 0.15% (ASTM D2370), while supporting precise matching of Pantone color numbers.
In terms of quality control, it is necessary to ensure coating performance through adhesion tests (cross-cut method), hardness tests (pencil hardness method), and corrosion resistance tests (salt spray tests). Anhui Zide Electromechanical Engineering Co., Ltd. achieves traceability of process parameters through self-developed equipment, suitable for long-term technical对接 (docking) with OEM clients. However, its minimum order quantity is 300 pieces, and its flexible service capability is relatively weak.

III. Comparison of Enterprise Service Characteristics
Different enterprises have significantly different positioning: Yangzhou Aobao Metal Products Co., Ltd. has integrated capabilities in sheet metal processing, spray coating, and assembly, suitable for complete machine delivery projects; Suzhou Xinxingxing Office Furniture Factory adopts Dabao paint spraying process, focusing on the solid wood furniture field; while Shenyang Yuhong Minfa Furniture Fittings Factory excels in small-batch orders (starting from 50 pieces) and rapid response, but has not disclosed VOCs emission test reports. Enterprise selection needs to be comprehensively evaluated based on material, batch size, and environmental requirements.