Nozzle filters are used to prevent contamination from the plastic melt causing blockages or interruptions to the injection process.  These contaminates can cause damage to hot runner systems resulting in extended downtime and increased maintenance costs.

The design of the voestalpine Flow Filter capitalizes on the unique capabilities of 3D printing to integrate a static mixer and filter into a standard form factor, delivering improved performance over traditional injection molding nozzle filters.

This configuration of inline static mixer and filter helps prevent feed blockages caused by material impurities, such as those encountered when processing recycled materials and delivers superior mixing properties when using additives.

The unique material flow design of the flow filter results in a significant reduction in pressure drop typically associated with traditional injection molding nozzle filters, giving additional benefits such as reduce machines wear and energy consumption.

Each filter is manufactured using UDDEHOLM AM CORRAX.   This dedicated Plastic Injection Mold steel has been specifically design for Additive Manufacturing applications, it properties ensure the highest possible molding performance due to its increased corrosion and wear resistance.



  • Up to 33% less Pressure Drop* – reduced machine wear, maintenance & energy consumption
  • Up to 50% less Shear Stress* – improved part quality & material properties
  • Reduced risk of mold surface residues
  • Easy to clean (Reverse Flow System)
  • Increased filter life
  • flow filter X: Superior mixing performance – best suited when color additives are added to the plastic melt just before the injection molding process
  • flow filter V: Minimal pressure drop – best suited when pre-colored plastic pellets are used

*Compared to traditional edge filters.




  • Optimized material flow due to superior AM design
  • Large filtration surface area
  • Excellent mixing properties
  • Small filter mesh available for larger filter diameters
  • Excellent corrosion & wear resistance
  • High hardness (50 HRC)


Contact our Additive Manufacturing team
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