The revolutionary pre-chamber nozzle shown here, designed for plastic injection moulding, combines four metallic materials in a single component, thus showcasing the full potential of HERMLE MPA technology. The aim is to apply specific properties exactly where they are needed – rather than relying on a compromise base material for all tasks. The result: more stable process windows in the injection area, targeted protection against wear and corrosion as well as effective heat dissipation.
Material architecture and function
Base body: CuNi2Si (copper-based alloy) – forms the contour, combines good thermal conductivity with solid strength and provides the thermal basis for temperature control.
Corrosion-resistant tool steel 1.2083 (~53 HRC) – represents our standard in tool and mould making and thus serves as the baseline and benchmark for all optimised areas.
Wear layer 1.2379 (~60 HRC) – in the flow/cavity area near the front, where the melt stream occurs and the nozzle forms parts of the contour; ensures high resistance to abrasion and erosion.
Internal segments made of pure copper – targeted heat dissipation from the injection/hot spot area; promote faster cooling, more stable temperature distribution and reduces cycle times.
Benefits for injection moulding
More stable gate temperatures → ensure consistent filling and dimensionally accurate contours in areas close to the cavity.
Longer service life in the inlet/contour area → 1.2379 reduces wear caused by fillers/glass fibres/flow erosion.
Corrosion resistance → 1.2083 reduces the risk of corrosion (e.g. due to additives, cleaning cycles).
Cycle and quality levers → Local copper heat conductors improve cooling performance; reduce cycle times and thus increase productivity and component quality.
Design freedom → Properties are applied exactly where they are functionally needed; the nozzle assumes multiple tasks (temperature control, contour, protection), simplifying assemblies and enabling new possibilities in tool design.
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