Powder coating cabin or substructure therefor

• US 8,371,242 B2
• Filed: 12/08/2005
• Issued: 02/12/2013
• Est. Priority Date: 12/09/2004
• Status: Active Grant

• Current Assignee: Gema Switzerland GmbH (Graco Incorporated)
• Original Assignee: ITW Gema GmbH (Illinois Tool Works Inc.)
• Inventors: Gelain, Silvano
• Primary Examiner(s): EDWARDS, LAURA ESTELLE
• Application Number:
  US11/720,792
• Publication Number:
  US 20090272317A1
• Time in Patent Office: 2,623 Days
• Field of Search: 118/325, 118/64, 118/600, 118/610, 454/50, 454/51, 454/53, 454/62, 454/63, 523/021
• US Class Current: 118/326
• CPC Class Codes: B05B 14/48 specially adapted for particulate material
• CPC Class Codes: B05B 16/40 Construction elements specially adapted therefor, e.g. floors, walls or ceilings ceiling elements filtering inflow of air into the booth B05B16/60; walls specially adapted for promoting separation of excess material B05B14/44

Abstract

In a powder spraycoating cabin or substructure for same, a cabin bottom contains bottom flaps configured near outer longitudinal walls and a walk-on bottom part situated between the bottom flaps. The bottom flaps are rotatable about an axis of rotation running in the lengthwise cabin direction, as a result of which the width of lengthwise bottom gaps situated bilaterally about the flaps can be varied. A suction duct is situated underneath. The walk-on bottom part is fitted with compressed-air outlets to blow compressed air toward/into the lengthwise bottom gaps.

Claims

1. A powder spraycoating cabin substructure, above which objects to be coated are movable in a longitudinal direction, the substructure comprising:

outer longitudinal walls,

outer bottom flaps configured adjacently to the outer longitudinal walls and rotatable about respective axes of rotation which extend in the longitudinal direction, outer lengthwise bottom gaps, each being subtended between an outer side of one of the outer bottom flaps and a corresponding one of the longitudinal walls;

at least one further bottom part being subtended between the two outer bottom flaps, said at least one further bottom part including a central bottom part positioned at a center of the substructure in a transverse direction perpendicular to the longitudinal direction; and

inner lengthwise bottom gaps, each being subtended between an inner side of one of the outer bottom flaps and an outer side of an adjacent further bottom part;

wherein

a width of each of the lengthwise bottom gaps is adjustable by a rotation of the adjacent outer bottom flap;

the outer bottom flaps and the outer lengthwise bottom gaps are configured above and overlap at least one suction duct;

said at least one further bottom part includes a walk-on bottom part;

compressed-air outlets are fitted to a top side of the walk-on bottom part to blow compressed air across a surface of the walk-on bottom part toward at least one of the outer lengthwise bottom gaps situated on both longitudinal sides of the walk-on bottom part.

2. The powder spraycoating cabin substructure, as claimed in claim 1, wherein

the central bottom part is the walk-on bottom part, and

the inner lengthwise bottom gaps are subtended between said central bottom part and the corresponding outer bottom flaps.

3. The powder spraycoating cabin or substructure for same as claimed in claim 1, further comprising

inner bottom flaps, each being configured between the walk-on bottom part, which is the central bottom part, and corresponding one of the two outer bottom flaps, each of the inner bottom flaps are rotatable about an axis of rotation that extends in the longitudinal direction;

wherein

each of the inner lengthwise bottom gaps is subtended between an outer side of one of the inner bottom flaps and the corresponding one of the outer bottom flaps;

innermost lengthwise bottom gaps are each subtended between an inner side of one of the inner bottom flaps and the walk-on central bottom part;

the inner bottom flaps and the innermost lengthwise bottom gaps are configured above and overlap the at least one suction duct.

4. The powder spraycoating cabin substructure as claimed in claim 1, wherein

the central bottom part is a bottom flap rotatable about an axis of rotation that extends in the longitudinal direction;

two walk-on bottom parts are configured each between the central bottom flap and one of the outer bottom flaps;

innermost lengthwise bottom gaps are each subtended between an inner side of one of the walk-on bottom parts and the central bottom flap;

the two inner lengthwise bottom gaps are each subtended between an outer side of one of the walk-on bottom parts and the associated outer bottom flap;

the central bottom flap and the innermost lengthwise bottom gaps are configured above the at least one suction duct,

said suction duct is open relative to the central bottom flap and relative to the innermost lengthwise bottom gaps.

5. The powder spraycoating cabin substructure as claimed in claim 1, wherein a top side of at least one of the outer bottom flaps is fitted with compressed-air outlets to blow compressed air toward at least the lengthwise bottom gaps associated with said outer bottom flap.

6. The powder spraycoating cabin substructure as claimed in claim 5, wherein a path for compressed-air is configured axially relative to the axis of rotation of said outer bottom flap and then transversely to the axis of rotation on the top side of said outer bottom flap.

7. The powder spraycoating cabin substructure as claimed in claim 1, wherein said substructure is fitted at least at one longitudinal end with at least one suction aperture above said at least one suction duct and communicating with said suction duct.

8. The powder spraycoating cabin substructure as claimed in claim 7, wherein the at least one suction aperture is configured opposite an end face of one of the outer bottom flaps.

9. The powder spraycoating cabin substructure as claimed in claim 1, wherein at least one suction aperture is configured in a longitudinal end segment of the walk-on bottom part or adjoins an end face of the walk-on bottom part.

10. The powder spraycoating cabin substructure claimed in claim 1, wherein several suction ducts are allotted to different lengthwise bottom gaps and to different said outer bottom flaps.

11. The powder spraycoating cabin substructure as claimed in claim 1, wherein the lengthwise bottom gaps configured transversely farther away from the center of the substructure in the transverse direction exhibit a gap width defined for spraycoating which is wider than the gap width of the lengthwise bottom gaps located closer to the center.

12. The powder spraycoating cabin substructure as claimed in claim 1, wherein

said at least one bottom part includes inner and outer bottom part, and

the outer bottom parts which are transversely farther from the center of said substructure are configured higher than the inner bottom parts which are located closer to the center.

13. The powder spraycoating cabin substructure as claimed in claim 1, wherein the inner side of one of the outer bottom flaps overlaps the adjacent bottom part when the outer bottom flap is adjusted to a minimum width of the corresponding inner lengthwise bottom gap.