Powder coating method
AssigneeFujitsu Limited
InventorsNaofumi KOSUGI, Yasushi Yui
Life of this patent
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Abstract
A coating film is formed on a surface of a coating object by adhering a coating powder to the coating object by spraying the coating powder from an electrostatic gun together with a compressed gas. A voltage not smaller than 80 kV but not larger than 100 kV is applied between the electrostatic gun and the coating object. Moreover, a current flowed between the electrostatic gun and the coating object is set to be not smaller than 10 μA but not larger than 20 μA. Further, a pressure of the compressed gas for spraying the coating powder is set to be not smaller than 3 kgf/cm2 but not larger than 6 kgf/cm2.
Claims5
A powder coating method comprising:
- adhering a coating powder to a coating object by spraying the coating powder from an electrostatic gun together with a compressed gas,
- wherein, in the adhering the coating powder to the coating object, the coating powder is sprayed from the electrostatic gun under conditions that a voltage applied between the electrostatic gun and the coating object is set to be not smaller than 80 kV but not larger than 100 kV, a current flowed between the electrostatic gun and the coating object is set to be not smaller than 10 μA but not larger than 20 μA, and a pressure for spraying the coating powder from the electrostatic gun is set to be not smaller than 3 kgf/cm2 but not larger than 6 kgf/cm2.
A chassis comprising:
- a coating film formed by
- adhering a coating power to a coating object by spraying the coating powder from an electrostatic gun configured to spray the coating powder under conditions that a voltage applied between the electrostatic gun and the coating object is set to be not smaller than 80 kV but not larger than 100 kV, a current flowed between the electrostatic gun and the coating object is set to be not smaller than 10 μA but not larger than 20 μA, and a pressure for spraying the coating powder from the electrostatic gun is set to be not smaller than 3 kgf/cm2 but not larger than 6 kgf/cm2, and
- subjecting the coating object with the coating powder adhered thereto to a heat treatment at a temperature not lower than 180° C. but not higher than 220° C.
Dependencies are inferred from the claim text.