Compensation of Fluctuations in Plastic Viscosity

The intelligent assistance programme, iQ weight control (plus), regulates every injection process during production. It adjusts the injection volume depending on the plastic viscosity in the current cycle. Fluctuations are compensated for in each shot, thus reducing the scatter of the moulded part weight by up to 85%. You benefit from better process stability, increased part quality and process repeatability.

Fluctuations in the viscosity of plastics are a major challenge when processing recyclates and bioplastics. iQ weight control (plus) detects these fluctuations in the raw material and adapts the injection process to the current production conditions. Recyclates and bioplastics can thus be processed from different sources - with a significantly minimised reject rate and increased productivity.

The simple visualisation when monitoring process-critical parameters in production immediately shows where adjustments are necessary in the injection moulding process. Automatic parameter calculations allow the iQ weight control software to compare the pressure curves of the injection volume with the determined reference curve. Additionally, iQ weight control plus regulates the injection process via the flow time. As a result, the system detects differences and corrects deviations in terms of plastic viscosity quickly and efficiently.

Only two parameters instead of over 40: With intuitive control now available in the injection process the lack of experience in running this often complex process is less of an issue. iQ weight control plus drastically reduces this hurdle: with just two parameters – pressure and time – the process can be adjusted easily and reliably. This saves time, reduces training costs and ensures stable processes – even without in-depth expert knowledge.

Pressure-controlled injection prevents rejects in the event of mould problems. If one or more cavities in the mould are off, volume-based switchover often leads to over-injection and rejects. iQ weight control plus regulates based on pressure instead: the machine immediately detects changes in filling behaviour, e.g. by switching-off a hot runner zone, and automatically adjusts the process – for stable quality, even with partially occupied moulds.