HDA 605 high-speed rotating bell spray system for household appliance accessories Surface spraying

Electrostatic Spraying Technology for Small Appliance Parts

Electrostatic rotating bell spraying technology is widely used in the surface treatment of small household appliance accessories. Its core principle is to achieve directional adsorption and uniform coverage of coatings through high-voltage electrostatic fields. The following is a summary of technical points:

1. Technical principles

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Apply the rotary atomizer (rotating bell) to generate centrifugal force at high speed (2000-4000 rpm) to atomize the paint into micron-sized particles.

With a high-voltage electrostatic generator (60-100 kV), the paint particles are negatively charged and the workpiece surface is positively charged, achieving efficient adsorption through electric field force

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2.Equipment composition‌

·‌Electrostatic high-rotation bell: core atomization device, including metal cup and high-speed motor‌12; ·‌High-voltage electrostatic generator: provides stable electrostatic field; ·‌Feeding system‌: includes paint pump and flow controller; ·‌Workpiece conveying system‌: automated conveyor belt or robotic arm.

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3.Technology flow‌

.‌Surface pretreatment‌: cleaning, degreasing, phosphating (to ensure the conductivity of the workpiece);

.‌Electrostatic spraying‌: atomizing the paint through the rotary bell, and the electric field guides the charged particles to adhere evenly‌

.‌Curing treatment‌: infrared or hot air baking (temperature 120-180℃, time 10-30 minutes).

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4. Technical advantages‌

·‌High paint utilization rate‌: electrostatic adsorption reduces scattering, saving 20-30% of paint‌34;

·‌Uniform coating‌: suitable for complex curved surfaces (such as small appliance housings and handles);

·‌Environmental protection‌: reduces VOC emissions and meets environmental standards;

·‌Automation adaptation‌: can be integrated into smart production lines to improve efficiency.

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5. Applicable materials and coatings‌

·‌Substrate‌: metal (aluminum alloy, stainless steel), plastic (requires conductive pretreatment);

·‌Coating type‌: epoxy resin, polyester powder coating (special for electrostatic spraying).

Through this technology, the appearance quality and durability of small household appliance accessories can be significantly improved while reducing production costs.

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