Powder coating device and powder coating method

A powder coating method comprising:

• filling a powder resin into a powder flow tank with closed sides;
• measuring a surface height of the powder resin filled in the powder flow tank at a first plurality of points;
• measuring a height of upper ends of a plurality of parts at a lower end of a workpiece where an insulating coating has been peeled off at a second plurality of points;
• vibrating the powder flow tank and swinging the powder resin filled in the powder flow tank;
• supplying air toward the powder flow tank via a porous body provided below a bottom surface that is opened of the powder flow tank and flowing the powder resin filled in the powder flow tank;
• inserting a part including the plurality of parts at the lower end where the insulating coating has been peeled off with a predetermined entry posture of the workpiece into the powder resin flowing in the powder flow tank by a predetermined entry amount with respect to the powder flow tank;
• and
• adjusting at least one of a flow rate of the air, a swing amount of the powder flow tank, the entry posture of the workpiece with respect to the powder flow tank and the entry amount of the workpiece with respect to the powder flow tank according to the measured surface height of the powder resin and the measured height of the upper ends of the plurality of parts of the workpiece where the insulating coating has been peeled off,
• wherein the power coating method is performed by a powder coating device which performs powder coating by inserting the plurality of parts at the lower end of the workpiece where the insulating coating has been peeled off into the powder flow tank with closed sides and filled with the powder resin, the powder coating device comprising:
• a surface height measurement part which measures the surface height of the powder resin filled in the powder flow tank at the first plurality of points;
• a peel height measurement part which measures the height of upper ends of the plurality of parts of the workpiece where the insulating coating has been peeled off at the second plurality of points;
• a swing part which vibrates the powder flow tank and swings the powder resin filled in the powder flow tank;
• an air supply part which supplies air toward the powder flow tank via the porous body provided below the bottom surface that is opened of the powder flow tank, and which flows the powder resin filled in the powder flow tank;
• and
• an adjustment part which adjusts at least one of the flow rate of the air, the swing amount of the powder flow tank, the entry posture of the workpiece with respect to the powder flow tank and the entry amount of the workpiece with respect to the powder flow tank according to measurement results of the surface height measurement part and the peel height measurement part.