Powder coating spray booth with a powder extraction system
First Claim
1. A powder spray booth comprising:
- a booth wall arrangement to contain powder during a spraying operation; and
a booth floor that is rotatable relative to the booth wall during a spraying operation.
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Accused Products
Abstract
A powder spray booth includes a booth canopy wall arrangement to contain powder during a spraying operation; and a booth floor that is rotatable relative to the booth wall 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 suspended off the floor 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.
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Citations
66 Claims
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1. A powder spray booth comprising:
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a booth wall arrangement to contain powder during a spraying operation; and
a booth floor that is rotatable relative to the booth wall during a spraying operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A powder spray booth comprising:
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a booth wall structure that at least partially encloses a powder containment area;
a booth floor that is rotatable about an axis; and
a powder extraction apparatus mounted in the spray booth and stationary with respect to said rotating floor. - View Dependent Claims (22, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 37, 38, 39, 40, 41)
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23. A powder spray booth comprising:
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a partially enclosed booth having a wall structure and a floor; and
a powder extraction apparatus that removes powder overspray from said floor during a spraying or cleaning operation;
said floor and said powder extraction apparatus being rotatable relative to each other.
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34. A powder spraying system comprising:
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a spray booth with a powder overspray collection apparatus;
a cyclone separator that receives powder overspray from the collection apparatus in a reclaim mode of operation; and
a bypass valve that operates to connect the cyclone to the powder overspray collection apparatus in a reclaim mode of operation;
said valve operating to isolate the cyclone in a non-reclaim mode of operation so that powder overspray from said collection apparatus bypasses the cyclone.
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35. A bypass valve for a cyclone separator comprising:
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a plenum having at least one opening in fluid communication with an outlet of the cyclone and also having an outlet opening;
and a valve element that in a first position closes said cyclone outlet and when in a second position said cyclone outlet is open to said plenum outlet.
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36. A method for extracting powder from a powder spray booth, comprising the steps of:
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rotating a floor of the booth about a longitudinal axis of the booth during a spraying operation; and
using a low pressure induced air flow to draw powder overspray off of the floor and extract the powder to a location outside the spray booth.
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42. A spray booth comprising:
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a non-conductive floor and canopy structure;
a powder overspray extraction duct disposed near said floor and comprising material that collect ions from electrostatic spray guns in the booth during a spraying operation. - View Dependent Claims (43)
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44. A powder spray booth comprising:
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a canopy having a vertically extending wall portion, a floor and a ceiling;
said canopy defining a partially enclosed powder spraying area;
said wall arrangement having at least one substantial opening therein for containment air flow into an upper region of said spraying area; and
a low pressure source near said floor and extending across said floor at a nonparallel angle to a primary flow direction of said containment air;
wherein containment air flows into said booth and at least partially turns to an outer region of said spraying area and descends down to said low pressure source. - View Dependent Claims (45, 46, 48, 49, 50, 51, 52)
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47. A spray booth comprising:
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a canopy and a floor;
said canopy being supported above said floor and separate therefrom.
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53. A powder spray booth, comprising:
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a floor;
said floor having a central hub;
a drive shaft; and
a connection between said drive shaft and said hub to rotate said floor about said hub during a spraying operation. - View Dependent Claims (54, 55, 56, 57, 59, 60, 61, 62, 63)
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58. A powder spray booth comprising:
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a canopy and a floor; and
a powder extraction duct that extends across said floor;
said extraction duct being supported above said floor at first and second ends of said duct;
said duct and floor having a gap therebetween along a length of said duct.
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64. A powder spray booth comprising:
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a non-conductive floor and canopy structure;
a powder overspray extraction duct disposed near said floor and comprising material that collect ions from electrostatic spray guns in the booth during a spraying operation;
said duct comprising composite non-conductive materials, wherein said non-conductive portion is a rounded cover for said duct. - View Dependent Claims (65, 66)
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Specification