HY-K093 Technical analysis of the combination of experimental electrostatic powder coating machine and curing oven

I. Principle of technical synergy
‌Electrostatic spraying and curing linkage‌
The experimental electrostatic powder coating machine charges the powder through high-voltage corona discharge and adsorbs it to the surface of the workpiece to form a uniform thin coating (0.5-5mil)‌. The curing oven melts, levels and solidifies the powder by heating (usually 180-200℃) to form a dense protective layer (the final thickness can reach 20-25mil)‌. The combination of the two realizes the "spraying-curing" closed-loop process to meet the laboratory's small batch and high-precision testing needs‌.
‌Parameter matching and control‌
‌Temperature matching‌: The heating temperature of the curing oven needs to be precisely matched with the melting point of the powder coating. For example, the curing temperature of epoxy resin powder is often set at 180-200℃, and that of polyester powder is 160-180℃‌.
‌Time synchronization‌: The curing time needs to be adjusted according to the coating thickness. The curing time for thin coatings (<50μm) is about 10-15 minutes, and the curing time for thick coatings (>100μm) needs to be extended to 20-30 minutes‌.
‌Airflow linkage‌: The powder spraying room and the curing furnace need to coordinate the airflow to prevent powder from contaminating the curing area, while ensuring the uniformity of the hot air circulation in the drying room (temperature difference ≤±5℃)‌.

2. Selection and configuration points ‌Laboratory adaptability‌ ‌Space matching‌: It is recommended to choose compact combination equipment (total area ≤5㎡), such as a modular mobile powder spraying room + tabletop curing furnace‌.
‌Parameter expansion‌: Priority is given to supporting multi-stage temperature control (at least 3 stages of program) and spraying parameter storage functions to facilitate the reproduction of experimental conditions‌.
‌Energy efficiency and environmental protection‌ ‌Electrically heated curing furnaces (thermal efficiency ≥85%) are recommended, which reduce carbon emissions compared to gas-fired ones, and have better temperature uniformity (temperature difference in the furnace ≤±3℃)‌. Equipped with a filter-type powder spraying room with a recovery rate of more than 99%, it reduces powder waste (the powder loss rate of experimental equipment should be ≤2%).

III. Typical application scenarios
‌New material verification‌
The combined system can test the coating adhesion (cross-cut method ≥4B), salt spray resistance (>500h) and other indicators of metal/non-metal substrates (such as aluminum alloy, MDF board).
‌Process simulation‌
By adjusting parameters such as spraying distance (150-300mm) and curing heating rate (1-5℃/min), the conditions of industrial production lines are simulated.
‌Teaching demonstration‌

Intuitively display the physical and chemical processes of electrostatic adsorption (30-100kV/cm field strength) and thermal curing (glass transition temperature Tg point observation).