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With the suitable equipment packages, ALLROUNDERs can also be used in special
injection moulding fields, such as gas injection technology (GIT) applications.
With the GIT process, compressed nitrogen is introduced into the mould cavities
during injection. Due to displacement of the plastic core, a hollow area is
created and the plastic material is optimally distributed. The internal gas
pressure usually ranges from 100 to 300 bar, but pressures of up to 450 bar are
also possible.
Gas injection technology allows material, and therefore costs, to be saved.
Faster cooling and therefore shorter cycle times are also achieved due to the
smaller wall thickness and the hollow space created. Furthermore, GIT parts
feature an improved weight/strength ratio of the moulded part. They also have a
much higher surface quality than foamed parts. Due to the more even pressure
conditions in the cavity, distortion is minimised and shrinkage reduced, thus
preventing sink marks.
Gas injection technology is used for the production of moulded parts with thick
walls, partial reinforcement and ribbed constructions, or parts where cores are
to be replaced by a hollow space.
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