PURPOSE: To easily form thermally sprayed parts having excellent shape accuracy on the surface of a thin metallic substrate by forming mask patterns of a specific structure on the surface of this metallic substrate and irradiating the substrate with a plasma jet from its surface at the time of forming the thermally sprayed films having excellent wear resistance and insulation characteristics on the surface of the metallic substrate.
CONSTITUTION: The ribbed surface of a press plate 24 having thin regions 22 formed with the mask patterns having apertures 21 of a prescribed shape and ribs 23 outside the mask pattern regions is pressed to the surface to be thermally sprayed of the thin substrate 20, such as 'Imvar(R)' substrate. Thermal spraying particles in the plasma jet 25 from a plasma torch 31 in the upper part from the thermally sprayed films 27 on the substrate 20 through the mask apertures 21 of the press plate 24. Since the height h of the ribs 28 is higher than the thickness d of the thermally sprayed films, bridging does not arise between the thermally sprayed films 27 and the press plate 24 and since the ribs 28 are so constituted as to have large mass, the fluttering of the substrate 20 and the press plate 24 by the plasma jet 25 is suppressed and the patterning thermal spraying with good accuracy is Possible.
SHIRATORI TETSUYA
ASABE MITSUO
