Much like injection moulding and other filling processes, the cavity pressure curve is a key factor in process optimization and production monitoring. Characteristic process phases such as evacuation, filling and curing can easily be identified from the pressure curve allowing process parameters to be easily optimized to make production more cost-effective.
The pressure signal can also be used as a control variable for individual process steps for online process control. Anomalies in the pressure curve show whether defects can be expected in the final part which, if out of tolerance, can be ejected. The pressure signal is also captured and recorded to allow traceability of individual process steps. For these reasons, the pressure curve is an essential tool for quality assurance. Due to the much lower cavity pressure experienced in composite moulding systems, the cavity pressure sensor needs to measure low pressure with high resolution to reliably detect even the smallest pressure or vacuum changes. The new Type 4001A sensor meets all of these demands plus the integrated temperature element, accurate up to 275°C, monitors the temperature conditions inside the mould allowing automatic temperature compensation to correct the pressure signal due to thermal changes during the process.
The new Type 4001A low pressure and high temperature sensor is a vital addition to Kistler Instrument’s range of sensors and systems specifically tailored to optimize and automate manufacturing processes, including related quality assurance requirements.