MACHINERY | PROCESSING
extracted by the melt filter. Founded in 1977, US firm Randcastle built a
reputation for innovation in polymer extrusion before recently changing its name and rebranding to The Screw Company to better reflect a renewed focus on revolutionising polymer processing through screw technology, most notably the Molecular Homogeniser (MH) screw. “For decades, we’ve pushed the boundaries of what a single screw can do,” says Keith Luker, inventor of the MH screw and President of Randcastle. “This rebrand tells the industry exactly who we are and what we’re best at: screw design that fundamentally improves polymers.” While most of the polymer industry has focused on machines, materials, and additives, Randcastle has zeroed in on the screw, which it calls ‘the true engine of performance’. The company says its MH screw delivers compression-free mixing, reducing degradation, and producing ‘unmatched’ homog- enisation. This enables high output at low tempera- ture and permanent property improvements to polymers, including increased elongation at yield, higher impact resistance, improved clarity, greater moisture absorption (or reduced permeability,
depending on material), and stable extrusion without pre-drying. Unlike some other screws, the MH is engineered to process polymers gently and thoroughly, avoiding stress concentrations that can lead to yellowing and mechanical failure. In a presentation at the 2025 Plastics Technology Extrusion Conference in Boston, Massachusetts, Luker said, “We’re not just building extrusion lines, we’re making screws that make polymers better.”
Direct compounding KraussMaffei says its new Chopped Fiber Process- ing (CFP) technology enables separate dosing of PP and glass fibres in the injection moulding process for the first time. Both can be supplied directly via the machine’s conveyor system, homogenised, and processed with the help of the new CFP screw. This means no fibre clusters are formed during processing, ensuring optimum component properties at reduced cost. The technology enables plastic processors to individu- ally dose and mix polymers and fibre and allows them to develop their own formulations for components and build up material expertise, giving them a targeted competitive advantage
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