30 / May 2021 powderbulk.com
The system uses a Miller Weld-
master bag sealing system that can
close both types of bags used by
Diamond V (paper pinch bags and
step-cut laminated woven poly
bags). In the case of the paper pinch
bags, the bag sealing system folds
the pinch top and activates the hot
melt glue to close the bag top. With
laminated woven poly bags, the
system folds the step-cut top (like
a pinch bag top), then welds the
two plies of poly material together,
making an extremely durable seal.
In addition to the production
concerns, bag weights need to be
extremely accurate no matter what
system is implemented. The sup-
plier's newly implemented systems
provide bag weight accuracies of
±0.2 percent. PBE
For further reading
Find more information on this
topic in articles listed under "Bag-
ging and packaging" in the article
archive on PBE's website, www.
powderbulk.com.
Concetti North America
Hoschton, GA
844-601-5475
www.concetti.com
economical, yet highly consistent
and reliable."
These powdery materials are
often fluid, meaning the material
wants to flow in a way that's similar
to water. If not dosed correctly with
an inclined screw-fed weigher, the
material would flow past the end of
the screw and into the scale, throw-
ing off the weighment. To prevent
this, the supplier installed two
inclined screws to feed the scale,
one large for bulk filling and one
small for fine filling. The incline
prevents the product from flowing
once the screw stops turning. Also,
powdery materials can easily aer-
ate and take on air when dropped
into a bag, so the material must be
deaerated once in the bag using
deaeration probes.
machine, a metal detector, a check
weigher, a hybrid robot palletizer,
and a rotary arm stretch wrapper.
The new system doses each weigh-
ment with the dual screw feeders
before dropping the product to
the bagging spout. One advantage
of the new equipment is that it
squares every bag it picks from the
empty bag magazine before the bag
gets hung to the spout. By ensuring
the bag is hung squarely each time,
the subsequent bag transfer to the
sealer is aligned and consistent for
highly accurate and repeatable bag
presentation to the sealer.
"The new systems, while fully
automated, are brilliantly simple
in the design of the bag transfer
system" Giles says, "which makes
the machine simpler and more
The new Miller Weldmaster bag sealing system, which Concetti integrated
with the bagging line, can efficiently close both bag types that Diamond V
uses, paper pinch bags and step-cut laminated woven poly bags.
"The new systems, while fully automated, are brilliantly
simple in the design of the bag transfer system, which
makes the machine simpler and more economical, yet
highly consistent and reliable."
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