METHOD AND APPARATUS FOR THERMALLY SPRAYING MOLTEN METAL UNDER REDUCED PRESSURE BY LOW-TEMPERATURE GAS

摘要: PURPOSE:To reduce the load of arc and to melt continuously reasonably a metal in large quantities by placing melting zone under negative pressure lowering temp. an injection air current as low possible. CONSTITUTION:In thermal spraying method molten used for manufacturing precision metallic mold, conical pipe 2 is placed concentrical ly cylinder 1 with intervening clearance 5. A low-temp. compressed gas injected from 5, wire 11 melted electrically 25 generated at inside. Consequently, liq. body Q sucked into focus crushed form branched fine particle having complicated protrusions. The collied onto be sprayed quenching action its high speed. protrusions particles are meshed com bined adjacent particle. thus overheated some extent high-pressure current, simultaneously reduced cooled.