Evaluation of Aluminum-Flake Content in a Waterborne Metallic Base Coating Film Coated with Electrostatic High-speed Rotary Bell Cup Atomizer

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  • TERADA Masaru
    R&D Department, BAU-Robotics, Manufacturing Automation
  • AOIU Hiroyuki
    Material Planning Laboratory, Industrial Design Division, Department of Design & Architecture, Faculty of Engineering, Chiba University

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  • 高速回転型ベル型静電塗装機を用いた水性メタリックベース塗膜中のメタル片濃度の評価
  • コウソク カイテンガタ ベルガタ セイデントソウキ オ モチイタ スイセイ メタリックベース トマク チュウ ノ メタルヘン ノウド ノ ヒョウカ

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Metallic flake content, transfer efficiency, atomization characteristics, brightness, and flip-flop value of a waterborne metallic paint film coated with an electrostatic rotary bell cup atomizer were measured. Factors of atomizer were bell rotation speed (30,000-50,000 rpm) and shaping air flow rate (300-600 NL/min). The following results were obtained.<BR>1 Metallic flake content in the paint film increased with increasing the bell rotation speed and the shaping air flow rate.<BR>2 Metallic flake content in the paint film increased greatly when the shaping air flow rate was increased to 600 NL/min while the bell rotation number was more than 40,000 rpm.<BR>3 Brightness and flip-flop value increased with increasing the bell rotation speed and the shaping air flow rate.

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