Plasma spraying apparatus

A plasma spraying apparatus, comprising:

• a main torch comprising:
• a first electrode comprising a spraying material discharge hole at a tip center of a central axis;
• a first mantle that surrounds the first electrode;
• and
• a first insulator that insulates the first electrode and the first mantle from each other and comprises a first plasma gas introducing port;
• and
• an auxiliary torch comprising:
• a second electrode;
• a second mantle that surrounds the second electrode;
• and
• a second insulator that insulates the second electrode and the second mantle from each other and has a second plasma gas introducing port, the auxiliary torch having a central axis that intersects with a central axis of the main torch;
• and
• a connecting pipe that connects the main torch and the auxiliary torch,
• wherein
• the spraying material discharge hole supplies a spraying material to an axial center of plasma that is formed on the central axis of the first electrode by the first electrode and the second electrode,
• the spraying material is melted and sprayed on a base material to form a coating,
• the first mantle comprises an opening part and a tapered part provided between the opening part and the first insulator,
• the first mantle comprises, on an inlet side of the opening part and/or or the tapered part, a gas introducing part that introduces gas,
• the gas introducing part introduces gas within the tapered part of the first mantle, and
• the gas introducing part is formed on a material of the first mantle that is different from a material of the first insulator.