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BOXES
A hi-air flow vacuum lift system, like the UniMove, is the fastest
and most effective way to lift and move boxes unless you have
the volume to justify an auto-palletizer. The hi-air flow system
easily compensates for the porosity encountered, and is the safest
method available. Lifting with lo-air flow, hi vacuum systems,
as with compressed air and a venturi convertor, does not have
sufficient air flow to safely deal with porous loads and is not
recommended.
There are a wide variety of rectangular, oval and round suction
feet available to fit cases as small as 7" x 7", and
as large as needed.
6-10 moves/min. are typical in palletizing operations with this
system. |
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A critical factor in the success
of lifting a carton safely is the ability of the corrugated board
to support its own weight. The Gross Weight Limit (GWL) rating
of the case, usually found on the star label on one flap, indicates
the intended weight capacity for that case. If the contents are
equal to, or lower than that weight, then the lift is usually
simple. If the content weight exceeds the GWL then the flaps
will usually not properly support the load under the lifting
pads. The Burst Strength rating on the label is usually 3X the
Gross Weight Limit and is NOT an indication of what the case
will support when lifted. |
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Lift Tables allow the worker to slide
and transfer boxes at a single height, but can ultimately require
the operator to bear some of the weight during transfer. |
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