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

carbide valve on a zpm

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.



posimelt diagram




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

posimelt 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

posimelt graph

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

posimelt EX screw


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