- Plastic recycling machinery are working
with water, in a dirty environment therefore mechanical
construction is as important as technology.
-
- The basic concept needs to be easy to handle, maintain
and fix when it comes the time.
-
- This because dirt wears out machinery sooner than
you think and, by the way, stainless steel is softer
than regular carbon steel and wears out even faster.
giorgio.mattiello@gmail.com
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- Pre-washing
of plastic scraps should be considered
when quantity and/or quality of contamination
exceeds the standard (if anything can
be called "standard" in plastic
recycling).
- Pre-washing
is something you may want to consider
dealing with agro-film, film with a
lot of paper contamination, PET
and HDPE bottles (because of labels
and glue) and all "difficult to
detach" contamination.
- Pre-washing,
saves granulator and/or shredder blades
from wearing but, on the other side,
decreases the possibility to go with
a dry granulator and this is, sometimes,
a bigger problem than going into it
with dirty scraps.
- So,
the matter should be evaluated very
carefully taking into consideration
what's positive and the other face of
the medal,
- There
are many ways to pre-wash scraps depending
on volume, size and mainly, type of
contamination, meaning a standard system
doesn't exist and many parameters should
be considered all the time.
- It goes by itself, for example,
that pre-washing with hot water, and
sometimes with the aid of some chemicals,
detergents and so on, delivers an easy
to handle product to the rest of the
washing line but the other question
is "how much it cost" at least
from operating point of you.
- If you are one of the Big Guys out
there that doesn't care about operating
costs because you have a return as imagine,
it
is a matter, while if you're trying to
make some money, you should consider
everything very carefully.
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