公开(公告)号：US20170087578A1

公开(公告)日：2017-03-30

申请号：US15266246

申请日：2016-09-15

Applicant: KEYMAY INDUSTRIES LTD.

Inventor： Donald Owen GUNN ,  Daniel Owen GUNN ,  Carl COLE ,  Karrie Albert Dee BEAUDRY

IPC: B05B13/04 ,  B05B7/14 ,  B05D7/14 ,  B05D1/12 ,  B05D3/02

CPC classification number: B05B13/0436 ,  B05B7/1459 ,  B05B7/1486 ,  B05B14/10 ,  B05B14/30 ,  B05D1/12 ,  B05D3/0218 ,  B05D3/0493 ,  B05D7/146 ,  B05D2254/04 ,  B05D2401/32

Abstract: An apparatus for powder coating a welded pipe joint includes a coating head having a powder chamber and at least one vacuum chamber. The coating head is mounted to a carriage operable to circumferentially traverse a pipe workpiece. The powder chamber has at least one inlet for receiving an air/powder suspension, and at least one outlet for delivering the air/powder suspension to a pre-heated weld zone of the pipe, such that the suspension fuses to and coats the weld zone. The vacuum chamber has at least one powder inlet for receiving excess air/powder suspension from the weld zone, and is connectable to a source of vacuum for exhausting the excess air/powder suspension from the weld zone. The coating thickness in the weld zone can be controlled by coordinated regulation of the air/powder flow rate into the powder chamber and the exhaust flow rate from the vacuum chamber.