Method of Operation
For the economical size
reduction of natural and synthetic rubber of any kind,
in form of bales, sheets or chips, vulcanized or
un-vulcanized, with or without textile reinforcement,
PALLMANN offers Ultra-Granulators™, series PS-C.
The rubber bales are fed by
hand or via a conveyor belt into the
Ultra-Granulators™, series PS-C
through a patented infeed chute with shuttle
flaps that guarantees a guided material feeding and a
dosed material intake.
material is the granulated to the desired size by means
of the specially designed guillotine rotor; the open
design, without a traversing shaft and with a high
momentum flywheel, allow a low friction and therefore
temperature gentle size reduction.
The particle size is
determined by the screen mesh size installed in
the knife mill. A pneumatic aspiration system is
installed downstream from the rubber granulator in order
to discharge the heat produced during the granulating
process and also to transport the granules.
The machine is
easily accessible for quick and thorough
cleaning as well as for knife exchange as the
upper part of the housing can be hydraulically
swung open. Low downtime is guaranteed as
the rotor and the stator knives are
adjustable outside of the machine and the screen
is easily exchangeable.
can be performed mechanically or pneumatically. Standard one, two or three
step size reduction systems can be offered. We
specialize in custom designed complete production lines.
One Step Preparation
cases where relatively simple types of rubber
such as NBR, SBR and EPDM are to be granulated
from a standard bale size to granule particle
sizes smaller than 10 mm, the granulating
process can be often performed in one step.
If the addition of a
dusting agent such as talcum or zinc stearate is
required, the dusting agent is injected directly
into the cutting chamber via a dosing rotary
airlock as well as a high pressure blower.
Therefore, right directly after the cut, the
surfaces of the cut granules are dusted thus
preventing caking. Overdosed dusting agent is
separated from the granules by means of a
recovery system and then reused.