Powder coating apparatus

A powder coating apparatus, comprising:

• a transport device that transports an object to be coated;
• an applying unit disposed to be opposed to a surface to be coated of the transported object to be coated and applying a charged thermosetting powder coating material onto the surface to be coated of the object to be coated, wherein the applying unit includes an applying section including a cylindrical or columnar applying member that is disposed to be separated from the surface to be coated of the object to be coated, is rotated in a direction identical to or opposite from a transport direction of the object to be coated, and transfers and applies the powder coating material attached to the surface onto the surface to be coated of the object to be coated according to a potential difference between the applying member and the surface to be coated of the object to be coated, and a supplying section including a cylindrical or columnar supplying member that supplies the powder coating material onto the surface of the applying member;
• a voltage applying device that includes a voltage applying unit applying a voltage in which an alternating voltage is superimposed with a direct voltage applying a potential difference between the applying member and the surface to be coated of the object to be coated;
• and
• a heating device that heats and thermally cures a powder particle layer of the powder coating material applied onto the surface to be coated of the object to be coated.