Meaning
Data collection rates determine how many discrete measurements a sensor records during a single process cycle. A high sampling frequency captures the subtle changes in cavity pressure that occur during the millisecond-long transition from injection to packing. If the rate is too low, the controller might miss the peak pressure entirely, leading to inaccurate process data.
Resolution Power
Capturing the fine details of a pressure or temperature curve requires a high number of data points per second. When the sampling frequency is set correctly, the resulting graph shows a smooth transition rather than a jagged or stepped line. This level of detail is necessary for detecting the exact moment of gate freeze or the onset of flash.
The standard rate for modern high speed moulding often exceeds one thousand readings per second to ensure no event is missed.
Curve Detail
Analyzing the shape of the injection curve helps engineers identify mechanical issues like a leaking check ring. A low sampling frequency masks these fluctuations, making the process appear more stable than it is in reality. Increasing the rate of data acquisition allows for a more precise calculation of the area under the pressure curve.
Observation Rate
Processing large amounts of data in real time puts a load on the machine controller. While a high sampling frequency improves accuracy, it also requires more storage space and faster processors to manage the data from multiple sensors.
