Hot runner systems

For precision injection moulding, hot runner systems offering high temperature stability, precise control and reproducible valve gate movement are crucial. Uniform melt flow and precisely aligned nozzles ensure consistent filling conditions and minimise dimensional deviations. Particularly where tight tolerances are required, precision-manufactured components and reliable temperature control play a key role in ensuring high process stability.

Optimally designed hot runner systems maintain constant temperature, pressure and melt flow. This reduces variations in filling, weld lines, sink marks and other quality defects. In valve gate systems, the controlled opening and closing of the gate also ensures a consistently high standard of component quality. The result is stable processes, less unusable parts and greater cost-effectiveness.

Technical plastics place high demands on temperature control and melt flow. Hot-runner systems with precise temperature control, aligned nozzle geometries and high-quality materials are suitable. A uniform melt flow prevents thermal damage to the material and ensures consistently high component quality – even with demanding plastics such as PA, PBT, POM, or PPS.

As no cold sprue is produced in a hot runner system, virtually all of the injected material is used to form the component. This reduces material consumption and eliminates the need to reprocess or dispose of sprues. Significant material cost savings and increased resource efficiency can be achieved, especially with high-quality or costly plastics.

Hot-runner systems with optimised flow cross-sections and low dead volume are suitable for frequent colour changes. These enable the system to be flushed quickly and reduce the amount of material residue in the melt channels. Precise temperature control also promotes a uniform colour change and helps to minimise start-up losses and unusable parts during changeovers.

This is precisely where Meusburger’s smartFLOW Helix comes in: The unique flow geometry creates a targeted vortex (‘helix’) within the nozzle, thereby effectively homogenising the melt flow before it enters the cavity. This ensures uniform melt flow, consistent part quality and stable processes – particularly during frequent colour changes, where high visual standards are required, in multi-cavity moulds and when processing technical plastics.

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