POWDER FEEDER FOR PLASMA-POWDER SURFACING Russian patent published in 2017 - IPC B23K9/32 

FIELD: technological processes.

SUBSTANCE: invention relates to means of plasma deposition of products with powder filler material, in particular to powder feeders of plasmatrons or similar devices. Powder feeder comprises casing with outlet chamber and dispensing hole, as well as overlapping element of dosing hole, made in form of shutoff needle. Feeder additionally comprises tube-separator with holes in its lower part and drive, connected with shutoff needle, wherein said needle is placed inside tube-separator and has weight, providing closing of dosing hole with shutoff needle, while there is no drive effect on shutoff needle. Drive may be made in form of electromagnet, fixed relative to casing, and is equipped with vibrator.

EFFECT: technical result consists in improvement of quality of welding and stabilization of thickness of built-up layer.

6 cl, 1 dwg