PALLMANN - John Wood & Associates

The use of plastic pipes is steadily
increasing worldwide.
PVC-pipes represent the largest
portion and are used, among
others, for water and wastewater
pipes.
Plastic pipe is produced by means
of extrusion and the corresponding
elbows and fittings by means
of injection moulding.
Any type of production waste and
reject pipes can be re-introduced
into the new production of pipes
as granule or powder if they are
Kunststoffrohre granulieren
Granulation of Plastic Pipes
correctly size reduced.
Depending on the diameter and
the length of the pipewaste,
standard PALLMANN knife mills,
type PS-K or special pipe crushers,
type PSR for up to 6 m long
pipes are used.
Special solutions with regard to
pipe feeding, are realized according
to the customers’ demands.
Due to the brittle material characteristics
of PVC, feeding can be
performed from the top. Knife
Mills, type PS-R are installed in a
pit or in a basement. On the upper
level, a tipper shaft is moved
upwards hydraulically after filling,
the pipe is gravity-fed into the rotor
and size reduced into granules.
A load-controlled, hydraulically
operated flap controls the amount
of pipes to be fed into the rotor to
prevent overfilling of the grinding
chamber.
The result is a high quality granule
that can either be directly
reintroduced into production or be
pulverized into powder, depending
on the extrusion technology.
Leading pipe manufacturers
worldwide use PALLMANN knife
mills and pulverization systems
for the economical preparation of
PVC-pipe waste.
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