PLASMA SPRAYING DEVICE

摘要

The present invention is a plasma spraying apparatus (100a) including: a main torch (1) that includes a first electrode (3) having a spraying material discharge hole, a first mantle (4), and a first insulator (27) having a first plasma gas introducing port (5); and an auxiliary torch (2) that includes a second electrode (10), a second mantle (11), and a second insulator (28) having a second plasma gas introducing port (12). In this plasma spraying apparatus, a spraying material (20) supplied from the spraying material discharge hole is melted at the axial center of plasma (18) that is formed on the central axis of the first electrode (3) by the first electrode (3) and the second electrode (10), and a gas introducing part (4c) that introduces gas is provided on an inlet side of an opening part (4a) and/or in a tapered part (4b) provided between the opening part (4a) and the first insulator (27) in the first mantle (4). With this configuration, it is possible to prevent the spray material (20) from adhering to an inner wall of the opening part (4a).