Overspray collection apparatus for a powder spray booth

Patent metadata

Field	Value
Publication number	US-9339835-B2
Application number	US-201314373710-A
Country	US
Kind code	B2
Filing date	Feb 4, 2013
Priority date	Feb 6, 2012
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

Overspray collection apparatus comprises an extraction duct ( 54 ) between two sloped floors ( 50, 52 ) with unobstructed inlet slots ( 88, 90 ) on either side thereof. The extraction duct ( 54 ) comprises two moveable panels ( 56, 58 ) pivotally mounted to the sloped floors ( 50, 52 ). Each moveable panel ( 56, 58 ) pivots about an axis that is offset from a lower portion of the moveable panel and a lower portion of the sloped floor. In another embodiment, the pivotal mount comprises an offset hinge. The overspray extraction duct ( 54 ) comprises a duct floor ( 60 ) and an air diffuser assembly ( 100 ) that extends at least partially across the duct floor. The air diffuser assembly ( 100 ) receives pressurized air and directs pressurized air into the extraction duct ( 54 ), whereby the pressurized air may be pulsed. The overspray extraction duct ( 54 ) comprises a suction hood ( 62 ) that includes moveable panels ( 56, 58 ). Optional actuators may apply a force impulse to one or more of the moveable panels ( 56, 58 ), and/or to open and close the suction hood ( 62 ) automatically.

First claim

We claim:

1. An overspray collection apparatus for a spray booth, the overspray collection apparatus comprising:
a first side wall and a second side wall that extend lengthwise along a longitudinal axis, an extraction duct disposed between said first side wall and said second side wall and that extends lengthwise along said longitudinal axis, a first sloped floor and a second sloped floor, said first sloped floor extending downward and away from said first side wall and towards a first side of said extraction duct, said second sloped floor sloping downward and away from said second side wall and towards a second side of said extraction duct,
said extraction duct comprising a duct floor that extends lengthwise along said longitudinal axis between said first side and said second side of said extraction duct and a suction hood that extends lengthwise at least partially over said duct floor,
said suction hood comprising a first moveable panel and a second moveable panel, said first moveable panel being hinge mounted on said first sloped floor by a first hinge and said second moveable panel being hinge mounted on said second sloped floor by a second hinge, said first moveable panel and said second moveable panel being moveable between an open position and a closed position, said first moveable panel and said second moveable panel when in said closed position forming said suction hood, and
said first moveable panel when in said closed position having a lower portion that extends below said first hinge and that is spaced from a lower portion of said first sloped floor and from said duct floor to form a first inlet slot of said extraction duct along said first side, and said second moveable panel when in said closed position having a lower portion that extends below said second hinge and that is spaced from a lower portion of said second sloped floor and is spaced from said duct floor to form a second inlet slot of said extraction duct along said second side.

2. The overspray collection apparatus of claim 1 wherein said first inlet slot and said second inlet slot produce a shear force as overspray material enters said extraction duct.

3. The overspray collection apparatus of claim wherein said first moveable panel and said second moveable panel when in said open position provide access to said extraction duct for cleaning.

4. The overspray collection apparatus of claim 1 wherein said extraction duct comprises a material that resists abrasion from coating material moving through said extraction duct.

5. The overspray collection apparatus of claim 4 wherein said material comprises stainless steel.

6. The overspray collection apparatus of claim 1 , further comprising an actuator operable to move said first moveable panel between said open position and said closed position.

7. The overspray collection apparatus of claim 6 , wherein said actuator comprises a pneumatically driven member that is connected at one end to said first moveable panel.

8. The overspray collection apparatus of claim 1 , further comprising an actuator operable to apply an impulse force to said first moveable panel.

9. The overspray collection apparatus of claim 8 , wherein said actuator comprises a pneumatically driven member that is connected at one end to said first moveable panel.

10. The overspray collection apparatus of claim 1 , further comprising a first actuator operable to move said first moveable panel between said open position and said closed position, and a second actuator operable to apply an impulse force to said first moveable panel.

11. The overspray collection apparatus of claim 1 wherein coating material moving through said extraction duct comprises glass frit.

12. The overspray collection apparatus of claim 1 comprising an air diffuser that extends across said duct floor in a transverse direction to said longitudinal axis, said air diffuser being adapted to receive pressurized air, said air diffuser comprising one or more openings through which pressurized air enters said extraction duct.

13. The overspray collection apparatus of claim 12 wherein said air diffuser is disposed on an upper surface of said duct floor and extends across said duct floor past said first moveable panel lower portion and said second moveable panel lower portion to provide pressurized air into said first inlet slot and said second inlet slot.

14. The overspray collection apparatus of claim 12 wherein said air diffuser extends across said duct floor at a right angle to said longitudinal axis.

15. The overspray collection apparatus of claim 12 , further comprising an air manifold that is disposed below said duct floor and is in fluid communication with said air diffuser, said air manifold being connectable to a source of pressurized air.

16. The overspray collection apparatus of claim 1 , further comprising a plurality of air diffusers that are spaced along said duct floor, each said air diffuser extending across said duct floor in a transverse direction to said longitudinal axis, each said air diffuser being adapted to receive pressurized air, each said air diffuser comprising one or more openings through which pressurized air enters said extraction duct.

17. The overspray collection apparatus of claim 16 wherein said air diffusers are evenly spaced apart from each other along said longitudinal axis.

18. The overspray collection apparatus of claim 16 , wherein pressurized air is supplied to said plurality of air diffusers at periodic time intervals.

19. The overspray collection apparatus of claim 1 , wherein said first moveable panel and said second moveable panel are sloped and contact each other at an apex above said duct floor when in said closed position.

20. The overspray collection apparatus of claim 1 , wherein:
said first inlet slot extends along the length of said first moveable panel and said second inlet slot extends along the length of said second moveable panel.

21. The overspray collection apparatus of claim 1 , wherein each of said first inlet slot and said second inlet slot extend an entire length, with respect to said longitudinal axis, of said extraction duct.

Assignees

• Nordson Corp

Inventors

• Shutic Jeffrey R
• Schneider Robert D
• Dailidas Jeffery Edward

Classifications

• Y02P70/36

  Cross-Sectional Technologies · mapped topic

• B05B15/1259 Primary

  Operations & Transport · mapped topic

• B05B15/1203

  Operations & Transport · mapped topic

• B05B15/1214

  Operations & Transport · mapped topic

• Y02P70/10

  Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working · CPC title