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ROTATIONAL
MOULDING MACHINES FOR PLASTIC HOLLOW ITEMS AND FOR
PRODUCTION OF:
Rotational
moulding technological process:
-
Loading
of plastic material into a hollow mould and closing of
the mould;
-
Planetary
rotation of the mould in oven at high temperature, with:
- fusion and uniform distribution, on the inner layer of
the mould, of all plastic
introduced material;
- moulding of an hollow-body piece with shape that is
exactly the same like the inner one of the mould;
-
Mould
cooling with air/water;
-
Mould
open to remove the moulded piece.
Plastic
materials normally used:
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Turbomixers
with capacity from 200 up to 1500 Lt. and Coolers PVC powder
compound preparation with capacity from 500 up to 6000 Lt.
PVC
mixes are used in powder or later turned in granules for the
further working with extrusion plants, injection, etc.
They
are designated for production of pipes, pipes connectors,
profiles sheets, film, medical articles, etc.
WORKING
TECHNOLOGY
In the turbomixer is introduced a PVC powder together with
other solid or liquid additives.
A high-speed rotation blade, driven by a high power motor,
is mixing powders heating it up to reach a temperature of
110-130°C in 10-15 minutes.
At the end of the stated cycle, the compound will go into a
cooler (usually a slower and horizontal model) that, due to
the thermal exchange, will cool it up to reach a temperature
of 40-50°C.
The homogenizing of all components and their hot permeation
produces a "compound", ready for following
transformations (direct use in extrusion of transformation
in granules for injection machines, etc.).
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