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.

voestalpine flow filters capitalize on the unique capabilities of 3D printing to integrate static mixers and filters into a compact form factor, delivering both ease of installation and improved performance over traditional injection molding nozzle filters.

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 reduced machine wear and energy consumption.

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


  • Combines filter and mixer in a single component
  • Large filtration area
  • Small mesh size
  • Good mixing properties
  • Low pressure drop
  • Low shear stress
  • Corrosion resistant
  • Wear resistant


  • Reduced risk of melt contamination
  • Lower maintenance and downtime costs
  • Space-saving installation
  • Improved part quality
  • Only slight increase in injection pressure
  • Easy cleaning
  • Long lifetime


  • flow filter X should be selected if improved mixing performance is required in conjunction with high quality filtration.
  • flow filter V should be selected for high quality filtration with minimum overall pressure drop.
  • Pressure drop and shear stress can be influenced by many parameters (eg injection material, filler material, temperature, etc).
  • voestalpine flow filters are not recommended for glass fiber reinforced plastics.



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