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HOW
THEY WORK
Product is loaded into the supply hopper either
by hand, infeed conveyors, screw conveyors, or tote
bags to name a few. From the supply hopper,
the product is "moved" by vibratory stainless steel
trays into a weigh bucket.
A machine
will either have one tray (for granular material or
small piece products of same size, shape and weight)
or three trays for product needing more separation
to obtain accuracy. The single tray system
uses a bulk speed (fast) and a dribble speed (slow)
to transfer product into the weigh bucket.
Once 98% of
the target weight is reached with the bulk speed,
the machine uses the dribble speed to get the last
2% in for high accuracy. The three tray system
(cascade, bulk and dribble trays) uses all three
trays to reach 98% of the target weight at a bulk
speed and finishes the last 2% using just the
dribble tray at a slower speed. Accuracy is
ensured because the dribble tray is narrower
allowing for only a small portion to be fed into the
weigh bucket to reach target weight.
Once the
target weight has been reached, the weigh bucket is
activated to dump either by a foot switch, indexing
conveyor or automatic bagger.
NOTE:
Each set of trays and weigh bucket equal one lane.
How fast you need to fill your product (units per
minute) determine the number of lanes needed (up to
6 lanes available depending on your product type). |
