Powder coating system

Apparatus for applying powder coating material onto objects, comprising:

• a spray booth having a ceiling, floor, opposed side walls and opposed end walls defining an interior which provides a controlled area for the application of powder coating material onto objects moving therethrough;
• powder collection means located beneath said floor of said spray booth for collecting oversprayed powder from said interior thereof, said powder collection means including:
• (i) powder collection chambers extending along substantially the length of said spray booth for receiving oversprayed powder from said interior thereof;
• (ii) a clean air chamber associated with each of said powder collection chambers, each of said clean air chambers having an interior which is isolated from the oversprayed powder entering said powder collection chambers;
• (iii) filter means located within each of said powder collection chambers and connected to said clean air chambers for collecting oversprayed powder thereon to form clean air which is introduced into said clean air chambers;
• (iv) a clean air plenum connected to each of said clean air chambers associated with said powder collection chambers;
• exhaust means connected to said clean air plenum for creating a negative pressure within said clean air plenum and within said clean air chambers connected thereto;
• sensor means for sensing the negative pressure within each of said clean air chambers;
• reverse air jet means associated with each filter means for dislodging oversprayed powder collected on said filter means connected to each of said clean air chambers, each of said reverse air jet means being operated in the event the negative pressure sensed by an associated sensor means falls below a predetermined level.

Apparatus for applying powder coating material onto objects, comprising:

• a spray booth having a ceiling, floor, opposed side walls and opposed end walls defining an interior which provides a controlled area for the application of powder coating material onto objects moving therethrough;
• powder collection means located beneath said floor of said spray booth for collecting oversprayed powder from said interior thereof, said powder collection means including:
• (i) powder collection chambers extending along substantially the length of said spray booth for receiving oversprayed powder from said interior thereof;
• (ii) a clean air chamber associated with each of said powder collection chambers, each of said clean air chambers having an interior which is isolated from the oversprayed powder entering said powder collection chambers;
• (iii) filter means located within each of said powder collection chambers and connected to said clean air chambers for collecting oversprayed powder thereon to form clean air which is introduced into said clean air chambers;
• (iv) a clean air plenum connected to each of said clean air chambers associated with said powder collection chambers;
• exhaust means connected to said clean air plenum for creating a negative pressure within said clean air plenum and within said clean air chambers connected thereto;
• a plurality of damper means, a said damper means interposed between each of said clean air chambers and said clean air plenum for at least initially adjusting the magnitude of said negative pressure within each of said clean air chambers;
• sensor means for sensing the magnitude of the negative pressure within each of said clean air chambers as oversprayed powder is collected on said filter means connected to each of said clean air chambers;
• reverse air jet means associated with each filter means for dislodging oversprayed powder collected on said filter means, each of said reverse air jet means being operated in the event the negative pressure sensed by an associated sensor means falls below a predetermined level.

Apparatus for applying powder coating material onto a vehicle, comprising:

• a spray booth having a ceiling, a floor, opposed side walls and opposed end walls defining an interior which provides a controlled area for the application of powder coating material onto objects moving therethrough;
• at least one powder collection chamber located beneath said floor of said spray booth for collecting oversprayed powder material therefrom;
• a clean air chamber having a housing formed with at least one access opening into the interior thereof, said interior of said clean air chamber being isolated from said at least one powder collection chamber and from said interior of said spray booth;
• filter mounting means for removably mounting a cartridge filter to said housing of said clean air chamber over said access opening therein and within said at least one powder collection chamber;
• a grating defining said floor of said spray booth having openings which permit the passage of oversprayed powder therethrough and into said powder collection chamber, said grating being removable for providing access into said at least one powder collection chamber to permit insertion and removal of said cartridge filter carried therein;
• means for drawing air-entrained powder coating material from said interior of said spray booth, into said at least one powder collection chamber and through said cartridge filter therein for filtering of the powder material to form clean air, said clean air entering said interior of said clean air chamber through said access opening in said housing thereof for subsequent discharge from said spray booth.

Apparatus for applying powder coating material onto an object, comprising:

• a spray booth having a ceiling floor opposed side walls and opposed end walls defining an interior which provides a controlled area for the application of powder coating material onto objects moving therethrough;
• powder collection means including a number of powder collection chambers for collecting oversprayed powder from said interior of said spray booth;
• exhaust means for drawing air-entrained, oversprayed powder material from said interior of said spray booth into said powder collection chambers for collection;
• powder recovery means associated with said powder collection means for transporting collected, oversprayed powder material from said powder collection chambers to a location exteriorly of said spray booth, said powder recovery means including:
• (i) a plurality of powder receiving means associated with each of said powder collection chambers for receiving oversprayed powder material collected therein;
• (ii) a header pipe connected to each of said powder receiving means;
• (iii) means for transmitting oversprayed powder material from each of said powder receiving means into said header pipe;
• (iv) means located exteriorly of said spray booth for receiving powder material from said header pipe;
• and
• (v) means for transmitting oversprayed powder material from said header pipe into said means located exteriorly of said spray booth.

Apparatus for applying powder coating material onto an object, comprising:

• a spray booth having a ceiling, floor, opposed side walls and opposed end walls defining an interior which provides a controlled area for the application of powder coating material onto objects moving therethrough;
• at least one powder collection chamber for collecting oversprayed powder from said interior of said spray booth;
• exhaust means for drawing air-entrained, oversprayed powder material from said interior of said spray booth into said at least one powder collection chamber for collection;
• powder receiving means associated with said at least one powder collection chamber, said powder receiving means having openings through which oversprayed powder collected in said at least powder collection chamber enters the interior of said powder receiving means;
• means for sealing said openings in said powder receiving means;
• means for introducing a jet of pressurized air into said interior of said powder receiving means with said openings sealed to transmit powder collected within said interior of said powder receiving means to a location away from said at least one powder collection chamber for storage or reuse.