Powder spray system

申请公布号：

US3960323(A)

申请号：

US19740517445

申请日期：

1974.10.24

申请公布日期：

1976.06.01

申请人：

NORDSON CORPORATION

发明人：

DUCAN, LANE S.;TAMNY, SIMON Z.;RIEDY, CHARLES H.

分类号：

B05B5/16;B05B7/14;B05B15/12;(IPC1-7):B05B5/02

主分类号：

B05B5/16

摘要：

A coating apparatus with a powder supply system for use in a device for electrostatically spraying powder material onto the surface of an article or substrate to be coated. The system includes a powder reclaiming and recycling system which pneumatically retrieves the unused powder from the spray booths and filters the powder from the air. The filter system includes plural modules, each capable of accommodating a given number of spray guns. An automatic filter shaking system releases the powder from the filters upon command by sequentially shutting down the filter modules, one at a time, while the system is in operation. An additional filter module is provided so that adequate filtering capability is maintained while the filter shaking operation proceeds. The powder released from the filters is blown from the filters to a feeder section through a sieve which mixes new powder with the reclaimed powder under automatic control which replenishes the powder supply to the feeder. The feeder employs a fluidizing bed from which (a plurality of) plural module feeders are fed. The feeders are positioned beneath the bed and draw powder through elongated standpipes for improved powder flow control. This configuration shows complete drainage of the bed and prevents "puffing" associated with conventional fluidized bed feeders. The feeders are quickly and easily detachable from the system and can be quickly and easily replaced or disassembled for cleaning when material or color change is desired.