Precise nozzle pressure

Melt pressure in front of the injection screw is an important process parameter for precision processing and machine control is critically dependent on its precise measurement. This is because injection molded components can only be kept within extremely tight tolerances if this pressure can be accurately and repeatably measured and recorded over an extended period. In this respect, the new melt pressure sensor Type 4021A from Kistler (Winterthur, Switzerland) is said to be a groundbreaking new development based on the piezoresistive principle of measurement. It measures this important machine parameter directly in the area in front of the screw with reproducibility errors of <0.1%, a linearity error of <0.5%, and a zero point change of <0.5%. Melt temperature can also be measured, while pressure measuring ranges of 0-100, 0-500, 0-1000, 0-2000, and 0-3000 bar apply. The maximum usage temperature is 350°C. —[email protected]