Powder injection system for a detonation spray gun

B - Operations – Transporting – 05 – B

Patent

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Details

B05B 7/20 (2006.01)

Patent

CA 2325021

The powder injection system is com-prised of a dosing chamber (2) which is di-rectly supplied by a conventional powder supplier (7) and communicates with the bar-rel (1) of the detonation gun through a di-rect conduit (5). Thus, the pressure wave which progresses through the barrel (1) en-ters through the communication conduits (5) and, when reaching the dosing chamber (2), is subjected to a sudden expansion which stops the powder supply from the continu-ous supplier (7) and produces the complete fluidification of the powder contained in the dosing chamber (2). The fluidized powder will then be entrained by suction up to the barrel (1) where it resides until the pressure wave generated in a new detonation cycle entrains said powder to deposit it to the sur-face of the part to be coated.

L'invention concerne un système d'injection de poudre composé d'une chambre doseuse (2) alimentée directement par un dispositif d'alimentation de poudre classique (7) et en communication avec le canon (1) du pistolet de détonation par un conduit direct (5). Ainsi, l'onde de pression qui avance à travers le canon (1) pénètre le conduit de communication (5) et lorsqu'elle atteint le chambre doseuse (2), elle subit une expansion brusque qui interrompt l'alimentation en poudre en provenance du dispositif d'alimentation en continu (7) et produit la fluidification complète de la poudre contenue dans la chambre doseusse (2). La poudre fluidifiée est ensuite entraînée par succion dans le canon (1) où elle reste jusqu'à ce que l'onde de pression générée dans un nouveau cycle de détonation l'entraîne pour la déposer sur la surface de la pièce à revêtir.

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