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LANFRANCHI of Italy, have developed a new rotative unscrambler twister
for PET preform handling which has been designed to unscramble difficult
to handle PET preforms, such as those that have the neck ring diameter
smaller than the body diameter, and therefore are not suitable for
orientation via traditional unscrambling systems.
With a trend to light weight PET bottles using preforms requiring high
stretch-to-blow ratios, smaller preform body diameters are becoming a
more common occurence.
The Lanfranchi LRPU rotative unscrambler twister undertakes 5 simple
steps:-
1. Preforms are introduced in the lower part of the selection cylinder
and fall into specially designed spaces (cradles) on the circumference of
the cylinder
2. Preforms inside the cradles go through a position reading station
which determines the position of the neck
3. Preforms reach an opening in the side structure and are extracted by
the suction head of the vacuum star wheel
4. The suction heads, driven by an electrical or pneumatic system, rotate
in clockwise or counter clockwise direction, depending on the
instructions received from the reading station, in order to turn the
preforms to a vertical position
5. Preforms are inserted in the descent channel guides to be coveyed to
the PET stretch blow moulder machine.
The LRPU machine is currently available in speeds ranging from 8,000 to
18,000 preforms/hour with higher out-puts planned.
LANFRANCHI is represented in Oceania by HBM Plastics & Packaging
Technologies.
Contact:-
Australia
Gary Brown +61 2 8814 3100 gary@hbm.com.au
Geoff Kelly +61 3 9646 3153 geoff@hbm.com.au
New Zealand
Wayne Brown +64 9 277 6144 wayne@hbm.co.nz
Plastics News International Magazine - December 2008
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