The screw is an important, if not the most important tool in plastics processing. Every now and then, it deserves a critical analysis, especially when things are moving as screw geometry is regarded.
The Euro-Stel screws have an excellent reputation worldwide because of
their high quality. Quality means the perfect ratio between plasticizing
capacity, output and wear resistance.
The intended application for the screw will determine the steel grade to be used as well as the corresponding thermal treatment. For instance: screws in nitride or chromium steel can have a spiral, which is armoured or not. This kind of screws can be nitrated or a special surface lamination can be applied to the core. Apart from that, we also supply hardened screws in tool steel or powder metal, which resists to extreme abrasion and/or corrosion. Finally, we offer screws in super-alloys (Hasteloy-Inconel) for special applications.
The geometry of the screw determines not only the plasticizing behaviour
and the output of the screw, but the wear behaviour as well. Experience
tells us that a good metallurgy and quality of the screw do not contribute
to the wear resistance of the product if the screw geometry is inappropriate.
Euro-Stel supplies screws with all kinds of geometries, for the simple three-zone screw to the most complex geometries. Throughout the years, we have acquired a lot of experience as plastics processing is regarded, which enabled us developing our own Euro-Stel geometries for a wide range of applications.
The essential element, which is responsible for the high quality of the
Euro-Stel screws, is the particularly efficient homogenisation component.
Principle of the EUROSTEL mixing part
Features of the EUROSTEL mixing part
All-round EUROSTEL mixing screw with EUROSTEL mixing part
This screw can be considered as a conventional three-zone screw, however
with a EUROSTEL mixing part in the metering zone at the end of the screw.
Depending on the materials to be processed, this screw has a variable
helical pitch, which can change throughout the length of the screw.
The EUROSTEL mixing screw is an all-round screw with a wide spectrum,
improved plasticizing results such as quality and output and a long life
(of screw and cylinder!). This screw reveals its special features preferably
when colouring with master batch.
High-output EUROSTEL screw with EUROSTEL mixing part and barrier
The high-output EUROSTEL screw is an extension of the EUROSTEL mixing
screw and has a supplementary barrier part.
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