Nordson HORIZON 200, Руководство по эксплуатации продукта

Страница: 14 / 124

Description
2-2
Part 106913 − 04
E 2018 Nordson Corporation
System Operation
See Figure 2-1.
Powder Application
A porous fluidizing plate in the bottom of the feed hopper (8) diffuses
low-pressure compressed air into the powder supply. The air fluidizes the
powder, so it can be pumped to the spray guns. A vent duct connects the
hopper to the color module (10).
The powder pumps (7) draw the powder out of the hopper, mix it with a
high-velocity stream of air, and force it through the feed hoses (9) to the
powder spray guns (2). The guns electrostatically charge the powder and
spray it onto the workpieces (3) passing through the enclosure (1). The
charged powder sticks to the grounded workpieces.
Powder Recovery and Reclaim
The exhaust fan (16) pulls spray-room air through the enclosure and into
the color module through an opening in the base floor. A skirt seal prevents
powder from escaping from the gap between the base floor and the color
module. The air flows through the cartridge filters (13), into the fan
compartment, through the final filters (17), and back into the spray room.
The standard, manual fan damper (15) (Horizon 400 only) controls the
volume of air flowing through the booth.
The oversprayed powder suspended in the air collects on the external
surfaces of the cartridge filters. At timed intervals, the pulse valves (14)
force large volumes of air through the center of the cartridge filters, blowing
off the collected powder. The powder falls into the color module hoppers,
where it is fluidized.
The transfer pumps (12) pump the fluidized powder in the color module
hoppers through the transfer hoses (11) to the accumulator (5) on top of the
sieve (6). The powder flows from the accumulator into the sieve screen.
The screened powder falls into the feed hopper. The sieve discharges
particles and clumps too large to pass through the screen into a scrap
container. The vent hose (4) connecting the accumulator to the color
module helps maintain a neutral air pressure in the accumulator and sieve.
Non-Reclaim Systems
You can convert your Horizon system from reclaim to non-reclaim by
installing a color module for the new powder and connecting the transfer
hoses to a scrap drum instead of an accumulator and sieve. You can then
use a standard feed hopper attached to the color module, or a portable feed
hopper, to supply the new powder to the spray guns.