HX M16, Manual

Page: 42 / 137

HAIXING
Chapter2 Safety
2-
11
2.1.4 Explosive decomposition
When exposed to prolonged heating, some plastic materials have a
tendency to react by decomposing and becoming explosive. In particular,
these are polymethyloxide and PVC. The type of plastic that react in this
way should only be processed using nozzles which are apart from mould
when pressure builds up and then the air caused by decomposition can be
flowed out from nozzles.
Prevention of accidents by:
►Adhering strictly the prescribed parameters of the plastics materials, in
particular, processing temperature and dwell time in the plasticsing
cylinder in line with the material manufacturers specification.
►when processing heat sensitive plastics, the dwell tines of the material
in the pladticising cylinder should be reduced, when there are
intermissions in production or there is a material change, polythelene
should be used for purging (to cleanse the pladticising cylinder of any
sensitive material) and then the heating switched off.
2.1.4
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