to enhance their green credentials, being
able to reduce the wall thickness of
packaging by up to 25% is a significant
advantage.
How is injection compression moulding
different to conventional injection
moulding?
It’s all linked to the closure mechanism Fill time for injection compression These usually perform a dual purpose,
and the consequent clamping pressure moulding when operating at maximum automating the placement of labels
applied within the machine, which helps speed is 0.2 seconds, with a total cycle into the mould and taking packaging
to reduce shrinkage and ensure even time of around 3.3 seconds, depending on components out of the mould and
distribution of the plasticised material in the application. stacking them.
the cavity. Are there other environmental
benefits?
In conventional thin wall injection
moulding, faster filling and higher
pressures are required to drive molten
plastic material into thinner cavities to
prevent it freezing off between shots.
It would be extremely challenging to
repeatedly accomplish a 0.35mm wall
thickness using this method. During
injection compression moulding,
plasticised material is introduced into the
cavity prior to complete locking of the
mould.
The machine closing movement aids
distribution of plasticised material in the
cavity.
Yes, switching to injection compression
moulding can deliver savings on
energy consumption as a result of the
significantly lower clamp force pressure.
Additionally, because less clamp
force is required, thin wall packaging
manufacturers can opt for a smaller
machine with reduced tonnage and a
smaller footprint. Being a hybrid machine
means that speed and precision are not
compromised on the El-Exis SP range.
This is all due to the servo-driven
hydraulic clamp unit, engineered to
execute precise movements. For
This injection compression reduces high-volume thin wall packaging
the injection pressure and the required manufacturers, these enhancements
clamping force, and this consequently aid company profitability and deliver
removes the internal stresses from the both the capacity and flexibility to meet
product, resulting in less warping due to future growth demands. Due to speed
shrinkage. of production, most systems integrate
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