POWDER COATING APPARATUS

• US 20120055398A1
• Filed: 09/01/2011
• Published: 03/08/2012
• Est. Priority Date: 09/08/2010
• Status: Active Grant

• Current Assignee: Parker Engineering Co. Ltd. (Durr AG)
• Original Assignee: Nihon Parkerizing Company Limited
• Inventors: KOUZOE, Katsutoshi
• Granted Patent: US 8,607,728 B2
• Time in Patent Office: Days
• US Class Current: 118/308
• CPC Class Codes: B05B 14/45 using cyclone separators
• 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
• CPC Class Codes: B05B 16/60 Ventilation arrangements specially adapted therefor
• CPC Class Codes: B05B 16/90 comprising conveying means for moving objects or other work to be sprayed in and out of the booth, e.g. through the booth

Abstract

Air is continuously supplied into upper spaces via an air supply duct, during coating of an object to be coated in a paint booth, whereby the air is jetted through jetting holes and flows downwards along side walls. The air flowing downwards along the side walls is sucked into lower spaces, via clearances, and is discharged out of the paint booth via air exhaust ducts.

Claims

1. A powder coating apparatus, comprising:

a paint booth having a ceiling, two side walls, two end walls and a floor;

a first air jetting assembly coupled to upper portions of the two side walls, for causing air to flow downwards along the side walls; and

an air discharge assembly coupled to lower portions of the two side walls, for sucking the air flowing along the side walls and discharging the air out of the paint booth.

2. The powder coating apparatus according to claim 1, wherein the first air jetting assembly comprises

a first plate-like member which is a rectangular member having two long side portions and two short side portions, such that one of the two long side portions is fixed to the ceiling while the two short side portions are respectively fixed to the two end walls, and the other one of the two long side portions is positioned closer to the side wall than the one of the long side portions, whereby a first space is formed by the first plate-like member, the ceiling, the side walls and the end walls;

and

a first air supply duct that supplies air from outside the paint booth into the first space, wherein a first jetting hole, through which the air supplied into the first space is jetted, is formed between the first plate-like member and each of the side walls.

3. The powder coating apparatus according to claim 1, wherein the first air jetting assembly is adapted to jet air continuously during coating in the paint booth.

4. The powder coating apparatus according to claim 1, wherein the first air jetting assembly is adapted to provide air in a pulsed manner during coating in the paint booth.

5. The powder coating apparatus according to claim 1, wherein the air discharge assembly comprises:

a second plate-like member which is a rectangular member having two long side portions and two short side portions, such that one of the two long side portions are connected to the side walls, whereby a second space is formed by the second plate-like member, the floor, the side walls and the end walls; and

an air exhaust duct that discharges air from inside the second space out of the paint booth, and wherein a first suction hole that sucks the air into the second space is provided at a portion where the second plate-like member and the side walls are connected.

6. The powder coating apparatus according to claim 5, wherein the second plate-like member is rotatable about a portion connecting with the side walls.

7. The powder coating apparatus according to claim 6, wherein the second plate-like member is split into a plurality of split plate-like members, from one of the end walls to the other of the end walls.

8. The powder coating apparatus according to claim 5, wherein a second suction hole that sucks air into the second space is formed between the other one of the two long side portions of the second plate-like member and the floor.

9. The powder coating apparatus according to claim 8, further comprising:

a third space provided under the floor;

a second air supply duct that supplies air from outside the paint booth into the third space; and

a second air jetting assembly protruding through the floor into the paint booth, for communicating with the third space, wherein the second air jetting assembly is provided with a second jetting hole that jets the air that has been supplied into the third space towards the second suction hole.