Attractivechina Completes Electrostatic Powder Coating Line Project for a Certain Air Compressor Manufacturer in Guangxi

In Feb 2026, the electrostatic powder coating line project for air compressor assemblies undertaken by Guangdong Chuangzhi Intelligent Equipment Co., Ltd. (brand name: Attractivechina) for a certain air compressor manufacturer in Guangxi was successfully delivered and put into mass production. Located in Guangxi, this project represents another significant achievement for Attractivechina in the general equipment manufacturing coating sector, fully demonstrating the company's system integration capabilities and engineering delivery expertise in complete electrostatic powder coating equipment.

Project Challenge: The Coating Difficulty of Irregular Assemblies

The client is a well-known air compressor manufacturer in China, with products covering screw air compressors, piston air compressors, and various compressed air system solutions. Air compressor assemblies consist of multiple irregular components including housings, bases, cylinder heads, heat sinks, and pipe brackets. These parts feature complex shapes, diverse materials, and significant weight variations, presenting numerous challenges to the coating process.

Prior to the introduction of this production line, the client's spraying operations relied primarily on manual handheld gun work, which presented three major pain points: First, in tight areas such as dense heat sink sections and pipe bracket corners, manual spraying often failed to achieve uniform coverage, frequently resulting in exposed substrate or excessively thick coating layers. Second, the workpieces are heavy and irregularly shaped, making flipping and spraying labor-intensive and inefficient, while also posing safety risks. Third, powder coating utilization was low, and the recovery and treatment of scattered powder were inadequate, increasing costs and negatively impacting the working environment. The client urgently needed an automated powder coating solution that balanced coverage, efficiency, and environmental performance.

Technical Solution: Full-Process Electrostatic Powder Coating System

After an in-depth study of the client's workpiece structural characteristics and production capacity requirements, the Attractivechina team designed and delivered a comprehensive full-process electrostatic powder coating line covering pretreatment, automatic spraying, curing, and powder recovery.

Pretreatment System adopts an automatic through-type spray cleaning solution, sequentially performing degreasing, water rinsing, silane treatment, and passivation sealing. This effectively removes oil contaminants and oxidation layers from the workpiece surface while forming a dense conversion film on the metal surface, significantly enhancing powder coating adhesion and corrosion resistance. In consideration of different material components' varying sensitivity to treatment temperatures, the system features zoned temperature control, ensuring that all types of workpieces achieve optimal surface condition during the pretreatment stage.

Intelligent Conveying and Powder Coating System forms the core of the entire line. The line employs an accumulating overhead conveyor chain that transports air compressor assemblies into the spray booth in sequence according to the production rhythm. The spray booth is equipped with multiple automatic electrostatic powder spray guns applying high-voltage electrostatic powder spraying technology, where powder particles are ionized by the guns and uniformly adhere to the workpiece surface. For complex structures such as dense heat sink areas and pipe brackets, the system achieves precise supplementary spraying through independent gun group control and spray gun angle adjustment, ensuring uniform coating thickness across every part. The spray booth features a fully enclosed negative-pressure design to prevent powder leakage.

Powder Recovery and Curing System is equipped with a high-efficiency large-cyclone secondary recovery unit. Powder escaping from the spray booth is recovered and reused after cyclone separation and filter cartridge filtration, achieving an overall recovery rate of over 98% and substantially reducing coating material consumption. After spraying, the workpieces enter a far-infrared hot-air circulation curing oven, where precise control of the heating curve and holding time allows the powder coating to fully melt, level, and cross-link, resulting in excellent hardness, adhesion, and surface gloss.

Core Highlights: Heavy-Duty Conveying and Intelligent Control

Given the relatively heavy single-piece weight of air compressor assemblies, the conveying system employs a reinforced accumulating chain and heavy-duty hangers with maximum load capacity fully meeting the conveying requirements of all workpiece types, ensuring smooth and reliable operation. The accumulation function enables workpieces between different processes to be buffered on the line, effectively balancing production rhythm and ensuring continuous operation of the entire line.

The line is equipped with a centralized control system that monitors and records key parameters across all process sections in real time, including temperature, chain speed, spraying voltage, and powder feed air pressure. Operators can flexibly call up different product process recipes through the host computer with one-touch changeover, significantly improving production scheduling efficiency and quality consistency.

Project Delivery and Customer Feedback

The project was delivered on schedule in Feb 2026 and passed customer acceptance in a single round. Since commissioning, the line has operated stably, with coating coverage and thickness uniformity significantly superior to manual spraying. Workpiece surfaces are smooth and even, with all adhesion tests meeting required standards. Powder utilization has increased from less than 60% to over 95%, resulting in a marked reduction in material costs. The working environment has also been greatly improved, with powder leakage completely eliminated. The client highly commended Attractivechina's professional technical capabilities and project execution efficiency. The successful commissioning of this line provides a solid foundation for the client to enhance production capacity, guarantee quality, and implement green manufacturing, while also establishing a new benchmark case for Attractivechina in the general equipment manufacturing coating sector.