Test & measurement


components. For example, some elastomers which normally do not need to be dried, have to be dried during certain property modifications.


One of the challenges is that not all of the drying equipment used by plastic moulding companies, including Camteam, is factory-fitted with proper moisture measurement technology. This means that it is each manufacturer’s responsibility to ensure that they maintain the right level of dryness without using excess energy. In addition, even drying units that include integrated moisture measurement sensors regularly require manual checking and calibration.


In addition to increasing demand for higher quality, the plastics industry is also seeking to improve sustainability. For example, products are required to be longer-lasting, and electric vehicles need more plastic parts than fossil fuel vehicles to operate efficiently. With many of Camteam’s customers ordering products that require more accurate production monitoring and control, injection moulding specialist Matti Majava was keen to investigate the best ways to optimise drying processes. “The way forward is to enhance the plastics injection process and by understanding more about material characteristics,” Majava explains. “On top of this, the move away from oil-based materials means that we need to expand our knowledge about new material bases and additives that have the right qualities.” Majava already knew some of Vaisala’s technical experts, so he contacted them in 2022 to learn more about his best options regarding high-accuracy moisture measurements. As it happened, Vaisala was just then completing pre- launch testing of their Indigo80 portable moisture measuring instrument, and invited Camteam to play an important testing role in the final development stages. Reporting on his experience with the new instrument, Majava says: “The Indigo80 is designed to check the dew point at different stages of the mould injection process, and we really liked how simple it was to use, and that it had all the features we need, including portability and easy handling during measurements.” In addition to spot-checks Majava also has a requirement to log data for a longer time. “We particularly appreciated the option to hang the Indigo80 near the drying machines and to leave it logging measurements, for review at a later time,” he explains. Typically, Majava checks various process conditions with the Indigo80 on a daily basis, and this data is used to inform his decisions. For example, certain drying processes can be shut down sooner when – thanks to the Indigo80’s accuracy – optimal dryness has been reached, which saves both time and energy. During this pre-launch evaluation, Majava suggested useful improvements to the product’s cable design as well as the possibility to save not only numerical data but also the device’s graphical visualisations. Expressing his pleasure with the successful partnership between Camteam and Vaisala, Majava says: “We were especially pleased that Vaisala encouraged our opinions and really took our input seriously. Consequently, we are very open to further co- operation and process development with Vaisala.” In summary, market demand for higher quality and improved sustainability is driving the requirement for more knowledge about materials and their behaviour characteristics when selecting raw materials for different products and processes. This in turn increases the need for advanced moisture measurement technology such as that provided by the Vaisala Indigo80.


Vaisala Instrumentation Monthly January 2024 vaisala.com 29


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