PLASMA SPRAY GUN

PURPOSE:To obtain film having good adhesive strength and strongly resisting thermal and mechanical shock by changing the position of a supply port of a material to be flame-coated or the angle of supply thereof to plasma flame according to physical differences between materials to be flame-coated. CONSTITUTION:The positions of supply ports of a material to be flame-coated 5 and 6 are differentiated referring to the center-line direction of a plasma spray gun 1, or the angle of a supply passage of the material to be flame-coated is differentiated referring to the center-line direction of the plasma spray gun 1, or the positions of supply ports of a material to be flame-coated 5 and 6 are differentiated referring to the center-line direction of the plasma spray gun 1 and also the angle of a supply passage of the material to be flame-coated is differentiated referring to the center-line direction of the plasm spray gun. Thus, a plurality of materials to be flame-coated are supplied by changing the positions of supply ports of a material to be flame-coated or an angle of a supply passage thereof or a combination of the positions of supply ports and the angle of a supply passage thereof to carry out flame-coating at an arbitrary mixing rate with the result that it is possible to form film having good adhesive strength and strongly resisting thermal and mechanical shocks.