MACHINERY | MATERIALS HANDLING
It is available in two models: the M5 unit detects moisture levels in the 10-1000 ppm range, while the M10 tracks moisture in a 300-3000-ppm band. Both sensors are electric, with no moving parts to maintain or change. Operation is passive, so there is no impact on production rates. Annual calibration and cleaning are the only regular maintenance chores.
The Moisture Minder can be used with Conair’s Drying Monitor, which provides
Above: Conair has implemented a common control across all its HMI- interfaced ancillaries
early indication that drying conditions are not right. Placed vertically in the drying hopper, the monitor probe measures temperature at multiple levels in the bed of material being dried. This detects anomalies that could result in unacceptable moisture levels in the resin when it leaves the hopper later.
Common control Conair has also implemented a common control across all its HMI-interfaced ancillaries – by adding a system for its dryers and drying equipment. Users can equip many of Conair’s drying
products with a control platform whose interface shares the same interactions and features as other Conair ancillaries, such as desiccant dryers and hopper temperature controllers. “Introducing the DC-B Common Control across our drying product line represents an effort to create an identical user experience across virtually all of Conair’s upstream auxiliary equipment,” said AJ Zambanini, drying products manager at Conair. Its dryer customers now have a control system
that offers the same interaction style for through- puts above 15 lbs/hr, he added. “The same control interface is already available in our blending, conveying, and temperature control auxiliaries, so there’s much less training involved for an operator to understand and master the use of different equipment.” Since introducing the platform into dryers, it has added three new features. The first is an automatic Airflow Monitor, which electronically measures the total airflow quantity (cfm) in all drying equipment – complementing automatic dewpoint monitoring – to ensure that the quality and quantity of drying airflow is correct. Secondly, it has ‘setback on’ input. Ordinarily, temperature setback is automati- cally triggered over a period of hours. The new feature allows the system to reduce to a standby temperature based on machine downtime. This
36 FILM & SHEET EXTRUSION | May 2023
gives the user an additional level of control and provides energy-saving and material overdry protection automatically. Finally, it has self-adapt- ing ‘smart’ recipes: the DC-B control offers 20 standard recipes and can store up to 3,000 production recipes overall.
Dried out Koch Technik exhibited a number of its dryers at K2022.
With its mobile KKT dry air dryers, hygroscopic
granules can be dried directly next to the process- ing machine. Depending on the model, 55-100m³ of dehumidified air per hour is passed through the drying container and the moisture of the granules is absorbed. The saturated drying air flows over two alternat- ing desiccant tanks, where it is dehumidified again. This produces deeply dried air with a dew point of around -35°C – corresponding to a value of 0.19 g
H2O per m³ of dry air. In addition, its Eko-N series encompasses nine
models, with dry air volumes of 110-2000 m³/h. These offer up to 50% energy saving at constant quality, thanks to thermal energy recirculation by means of a heat exchanger. The Eko-N concept, with modular design, allows
easy expansion of a drying system and can be fully integrated into Koch’s visualisation software. The heat exchanger concept in the tube system has been adopted from its earlier Eko dryer, and further improved. Thermal energy recovery reduces energy consumption by 20-30%, depending on the drying temperature of the material. This reduces the average energy consumption while maintaining the same quality, says Koch. The drying parameters of 28 materials are
preconfigured in the material database and a further 212 customer-specific recipes can be stored. As well as having a Siemens S7 control system, Eko-N dryers have a 10.4in touch panel display. This allows easy access to relevant operat- ing states – and the ability to adjust parameters such as drying time, temperature and dwell time.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.maguire.com �
www.altair.com �
www.motan.com �
www.brabender-technologie.com �
www.moretto.com �
www.coperion.com �
www.movacolor.com �
www.conairgroup.com �
www.koch-technik.com
www.filmandsheet.com
IMAGE: CONAIR
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