Powder coating spray booth with a powder extraction system

B - Operations – Transporting – 05 – B

Patent

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Details

B05B 15/04 (2006.01) B05B 7/14 (2006.01) B05B 15/12 (2006.01)

Patent

CA 2423306

A powder spray booth includes a booth canopy wall (12) arrangement to contain powder during a spraying operation; and a booth floor (16) that is rotatable relative to the booth wall (12) during a spraying operation. The floor can be rotated about an axis that is also the longitudinal axis of the spray booth. The booth may be generally cylindrical in shape with a round floor. The booth canopy and top are supported on a base frame separately from the floor. By this arrangement, the floor can be rotated relative to the booth canopy. A powder extraction apparatus in the form of a low pressure duct (40) suspended off the floor (16) draws up powder that has collected on the floor. The extraction duct is stationary with respect to the rotating floor during a spraying operation. The floor may also be translated along the axis of rotation between a first position in which the floor can rotate and a second position in which the floor is sealed against a lower edge of the booth canopy wall. The booth canopy and floor are made of composite materials that are very low in conductivity to minimize powder adhering to the floor and booth walls. The booth is thus easy to clean with a substantially shorter time period required for color change.

L'invention concerne une cabine de pulvérisation de poudre comprenant un arrangement de paroi couvrante de cabine (12) destiné à contenir une poudre lors d'une opération de pulvérisation et un plancher de cabine (16) qui peut tourner relativement à la paroi de la cabine (12) lors d'une opération de pulvérisation. Le plancher peut tourner autour d'un axe qui est aussi l'axe longitudinal de la cabine de pulvérisation. La cabine possède généralement une forme cylindrique avec un plancher rond. La couverture et le haut de la cabine sont supportés sur un cadre de base séparément du plancher. Avec cette disposition, le plancher peut tourner par rapport à la couverture de cabine. Un appareil d'extraction de poudre, sous la forme d'un conduit basse pression (40) suspendu au dessus du plancher (16) aspire la poudre déposée sur le plancher. Lors d'une opération de pulvérisation le conduit d'extraction reste stationnaire par rapport au plancher en rotation. Le plancher peut aussi subir une translation le long de l'axe de rotation entre une première position dans laquelle le plancher peut tourner et une seconde position dans laquelle le plancher est joint contre une bordure inférieure de la paroi couvrante de cabine. La couverture de cabine et le haut sont constitués de matériaux composites de conductivité très faible afin de minimiser l'adhérence de poudre sur le plancher et sur les parois de la cabine. La cabine est ainsi facile à nettoyer ce qui permet un changement de couleur de durée sensiblement plus courte.

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