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Posi-Melt™ Screw - the Ultimate Multi-Purpose Screw


The patented Posi-Melt™ screw is designed as a Multi-Purpose screw, enabling you still to process a range of resins, but with reduced screw back time, improved mixing and greater process consistency.

For applications where only one resin is processed, we can supply custom designed screws, often based on Posi-Melt™ technology. These give even greater process improvement than can be achieved with the 'standard' Posi-Melt™ screw.

  • Patented design offers higher melt quality and throughput than GP screw.

  • Change in pitch generates a mixing effect without the need for a mixing section.

  • Suitable for a wide range of resins – a true Multi-Purpose Screw.

  • Competitive manufacturing cost ensures the Posi-Melt™ is a cost effective choice.

  • Large range of alloys and coatings available for every application.

  • Available to suit any machine type or size.

Essential differences between a 'GP' screw and the Posi-Melt™ Screw


Through a series of flight pitch and root changes, the Posi-Melt™ screw delivers a more thoroughly melted and mixed melt pool.

Improved Processing Window


The improved melt quality of the Posi-Melt™ screw enables you to mould parts that are difficult to mould with a general purpose screw and the process window is substantially increased, as depicted in the graph. Also, one design is able to work extremely well with all resin groups.


Posi-Melt™ EX Screw - For Enhanced Mixing

  • Distributive and Dispersive action gives improved colour mixing

  • Increased throughputs mean faster screw recovery times

  • Consistent screw recovery with low deviation gives better cycle times

  • Low compression ratio extends screw wear life

  • Superior melt quality yields higher productivity

  • Available to suit any machine type or size

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