Wittmann’s WiAssist app adds plasticising module
The WiAssist app from the Wittmann Group now includes a module that calculates the material’s dwell time inside the plasticizing unit, aimed at simplifying the selection of the screw size and optimising injection moulding machine settings.
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The WiAssist app is intended to support machine setters and process engineers working with its injection moulding systems, reducing the need for manual calculations. WiAssist provides a material database which allows users to input material type, shot weight and cycle time. Based on these inputs, the app calculates key process parameters such as cooling time, internal mould pressure, injection pressure and screw speed.
At the core of the update is a new function that calculates the material’s dwell time inside the plasticising unit. According to Wittmann, this enables users to determine suitable machine settings and screw configurations in less than one minute. This calculation is intended to support the selection of an appropriate injection moulding machine, particularly in environments where multiple machines with different screw sizes are available.
The plasticising module is designed for use with three-zone screws from the Wittmann Group. It provides recommendations on screw diameter and metering stroke, alongside a visual display indicating whether selected parameters fall within optimal, partially suitable or unsuitable ranges.
Correct sizing of the plasticising unit is important, as screw dimensions directly influence both part quality and processing efficiency. A screw that is too small can result in insufficient melting due to reduced dwell time, while an oversized screw may increase dwell time and risk thermal degradation of the material. In addition to the new module, the WiAssist app includes functions for querying material properties, calculating process parameters, assisting with machine selection and setup, troubleshooting, and contacting Wittmann.
The troubleshooting feature provides a database of common injection moulding defects, along with possible causes and suggested solutions. Users can also contact Wittmann directly via email or telephone through the app.
