Winterthur, October 2022 – Thanks to a new PiezoStar crystal, the 9239B miniature longitudinal measuring pin from Kistler achieves almost five times the sensitivity of its predecessor – which already ranked as the technology leader. Also new: the 2205B thermocouple amplifier – now with multiple improvements – to integrate temperature sensors more efficiently into the measuring chain for high-grade injection molding.
Contact-free cavity pressure measurement with piezoelectric sensors is the most sophisticated of the three measurement methods used in injection molding (the other two are direct and indirect measurement). The contact-free method is mainly used where high quality and process requirements have to be met: examples include absolutely flawless products for automobile interiors, high optical quality (for items such as lenses), or situations where very compact injection molds are used.
The 9239B miniature longitudinal measuring pin from Kistler gives customers a cavity pressure sensor that takes up virtually no space when installed (diameter: 2.5 mm), and performs its task without contacting the melt. It is mounted directly behind the cavity wall in the mold structure or the embossing die, where it measures the pressure-induced compression of the mold during the injection and holding pressure phases. "Thanks to its compact dimensions for optimal installation, the 9239B gives moldmakers more freedom when positioning it in smaller molds or multi-cavity molds with more complex structures," according to Marko Marceta, Product Manager Plastics at Kistler.