Powder coating booth with a cleaning device and method

• US 6,616,764 B2
• Filed: 10/30/2001
• Issued: 09/09/2003
• Est. Priority Date: 05/04/1999
• Status: Expired due to Term

• Current Assignee: Nordson Corporation
• Original Assignee: Nordson Corporation
• Inventors: Krämer, Matthias, Krämer, Erich
• Primary Examiner(s): Crispino, Richard
• Assistant Examiner(s): LAZOR, MICHELLE A
• Application Number:
  US10/016,561
• Publication Number:
  US 20020050245A1
• Time in Patent Office: 679 Days
• Field of Search: 118/326, 118/634, 454/50, 454/53, 427/421
• US Class Current: 118/326
• CPC Class Codes: B05B 14/41 by cleaning the walls of the booth
• CPC Class Codes: B05B 14/48 specially adapted for particulate material
• CPC Class Codes: B05B 16/405 Partly or totally cylindrical walls; Round floors
• CPC Class Codes: Y02P 70/10 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

Abstract

A method for cleaning an interior of a coating booth is proposed in which blast air is used as at least one of the means for cleaning. For primary cleaning of the coating booth, blast air and corresponding suction operations are used, whereby blowing and suction can be carried out simultaneously, cyclically or sequentially. The invention also relates to a coating booth. The floor and/or the ceiling of the coating booth are formed by a separate floor part and/or a ceiling part which are movable relative to the peripheral wall. The floor part and/or the ceiling part include a cleaning device which can optionally be integrated with the respective floor part and/or ceiling part. The floor part and/or the ceiling part hence operate as a cleaning device for the coating booth. The cleaning device can be displaced in the interior space of the coating booth in a longitudinal direction.

Claims

1. A powder coating booth, comprising:

a peripheral wall extending in a longitudinal direction;

a floor and a ceiling cooperating with the peripheral wall to bound an interior space of the coating booth;

a cleaning device movable in the longitudinal direction and adapted to clean the interior space of the coating booth;

wherein at least one of the floor and ceiling is formed as a floor section or ceiling section, respectively, separate from the peripheral wall and also includes the cleaning device.

2. The coating booth of claim 1, wherein the cleaning device is integrated in the respective floor section or ceiling section.

3. The coating booth of claim 1, wherein the floor section or ceiling section are moveable in the longitudinal direction for cleaning the interior space of the booth.

4. The coating booth of claim 1, wherein the cleaning device includes a blowing device and a suction device.

5. The coating booth of claim 4, wherein the blowing device and the suction device are spaced apart in the longitudinal direction of the coating booth.

6. The coating booth of claim 4, wherein on the cleaning device, the blowing device is disposed forward and the suction device is disposed rearward when the cleaning device moves in a direction for cleaning the interior space of the coating booth.

7. The coating booth of claim 4, wherein the blowing device and the suction device are formed as a nozzle plate, with the nozzle plate of the suction device operating in a region of the peripheral wall proximate to a wall impact region of blast air emerging from the blowing device.

8. The coating booth of claim 4, wherein the blowing device includes a plurality of nozzles which are distributed along a periphery of the blowing device.

9. The coating booth of claim 4, wherein the suction device includes a plurality of suction openings which are distributed along a periphery of the suction device.

10. The coating booth of claim 1, wherein the floor section and/or ceiling section includes a sealing element.

11. The coating booth of claim 1, wherein at least one of the floor section and the ceiling section comprises at least two segments which are movable in the longitudinal direction and are moved towards one another in a transverse direction for cleaning the interior space of the coating booth.

12. The coating booth of claim 11, wherein the ceiling section includes a blowing device in the form of a blowing ring adapted to the cross-section of the coating booth, with the blowing ring facing the interior space when the segments of the ceiling section are moved towards one another for cleaning the interior space.

13. The coating booth of claim 12, further including an actuating device that moves the segments of the ceiling section towards one another for cleaning the interior space and is capable of lifting the segments from an upper edge of the peripheral wall.

14. The coating booth of claim 13, wherein the actuating device is implemented as an articulated lever mechanism.

15. The coating booth according to claim 1, wherein at least one of the floor section and the ceiling section comprises at least two segments which are moved apart from each other in a transverse direction during a coating operation so as to bound a pass-through slot.

16. The coating booth of claim 4, further comprising a secondary device connected to the suction device and selected from the group consisting of a cyclone device, a secondary filter device and a recovery device, wherein the connection between the suction device and the secondary device includes a controllable flap.

17. The coating booth of claim 1, wherein the ceiling section includes at least one ceiling cleaning device having nozzles for discharging compressed air to dislodge powder adhering to the peripheral wall, and at least one suction device disposed in the ceiling cleaning device for withdrawing the dislodged powder, wherein the at least one ceiling cleaning device is adapted to clean the space between the respective ceiling and floor sections.

18. The coating booth of claim 17, wherein the at least one ceiling cleaning device includes one or more suction hose connections for connecting the suction device.

19. The coating booth of claim 17, further including a powder recovery device with a secondary filter, wherein the suction device is connected to the secondary filter.

20. The coating booth of claim 19, wherein the connection between the suction device and the secondary filter includes a controllable flap.

21. The coating booth of claim 17, wherein the at least one ceiling cleaning device is disposed on a telescopic rail for movement between the respective ceiling and floor sections.

22. The coating booth according to claim 17, wherein the at least one ceiling cleaning device includes two cleaning units, with each of the cleaning units cleaning a half space extending in the longitudinal direction between the respective ceiling and floor sections.

23. The coating booth according to claim 22, wherein each of the cleaning units is disposed on an independent telescopic rail for movement between the respective ceiling and floor sections.

24. The coating booth of claim 4, wherein on the cleaning device, the blowing device is disposed rearward and the suction device is disposed forward when the cleaning device moves in a direction for cleaning the interior space of the coating booth.