What is powder coating?

Powder coating is a modern surface finishing technology for metal parts that uses a dry powder instead of liquid paint. The powder consists of finely ground particles of pigment and resin, which are applied electrostatically and then cured in an oven at high temperatures (usually between 160–200 °C). The result is a melted and hardened finish that is smooth, even, and extremely durable.

Advantages of Powder Coating:

Compared to traditional painting methods, powder coating offers multiple benefits:

• High durability – resistant to scratches, impacts, corrosion, UV rays, and chemicals.
• Eco-friendliness – no solvents and no emission of harmful volatile organic compounds (VOCs), making it safe for the environment.
• Cost-efficiency – overspray powder can be collected and reused, reducing material waste.
• Premium finish – smooth, drip-free, and uniform coatings.
• Variety of effects – matte, glossy, textured, metallic, and many other finishes are possible.

Applications of Powder Coating:

This technology is widely used across industries and everyday products, including:

• Automotive industry – wheels, body parts, chassis, and components
• Household appliances – ovens, refrigerators, air conditioners, etc.
• Metal furniture – office equipment, cabinets, chairs
• Architectural elements – window frames, railings, facades
• Industrial equipment – machinery, tools, production and storage systems

Common materials for powder coating:

• Steel (galvanized and plain)
• Aluminum
• Stainless steel
• Metal alloys

Some special powders are also used for coating MDF, glass, or plastic, though these require specific preparation.

Powder Coating at DeBulCo – Modern Conveyor Line by KEWESTA (Germany)

KEWESTA provides a high-tech conveyor line designed for powder coating of parts with maximum dimensions of 2500 x 1200 x 800 mm. The line features fully automated GEMA (Switzerland) manipulators that ensure consistent coating and layer thickness control.

The system allows powder coating of both ferrous and non-ferrous metals in all RAL colors, ensuring high productivity and premium coating quality.

Fully Automated Manipulators by GEMA (Switzerland)

GEMA Switzerland GmbH is a leading manufacturer of electrostatic powder coating equipment. Their fully automated systems include:

OptiGun® Automatic Gun

• PowerBoost® technology with 110 kV high voltage for optimal charging efficiency
• PCC (Precise Charge Control) for accurate current control, especially for sensitive applications
• DVC (Digital Valve Control) for precise and reproducible powder output
• Fast and easy color changes thanks to optimized design and easy maintenance

MagicControl 4.0

• Intuitive 12″ touchscreen for centralized control of all system parameters
• Storage and retrieval of customized programs
• Integration with higher-level management systems via Ethernet and CAN-Bus

OptiFlex® Automatic System

• Modular design supporting up to 21 control units per cabinet
• Optimized for fast color changes and minimal powder consumption
• Suitable for integration with PLC systems and other automated production lines

The combination of the advanced KEWESTA conveyor line and GEMA’s fully automated manipulators ensures high efficiency, quality, and flexibility in powder coating large-sized parts. This integrated system is key to the finishing process of many components and products manufactured for DeBulCo’s clients.

For more information or to request series production of sheet metal, wire, or tube components, call +359 888 703 887 or email us at info@debulco.bg.