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MATERIALS HANDLING | TECHNOLOGY


Conair auxiliaries, but with a range of competitive auxiliary equipment including temperature control units (TCU), positive-displacement vacuum-convey- ing pumps, single- and dual-stage regenerative vacuum pumps, portable loading/conveying systems and desiccant dryers. Conair says that these kits were created so auxiliary equipment that does not utilise computer- ised controls could be equipped with digital sensors and communications capabilities and linked to the cloud-based SmartServices platform with the same ease as newer equipment. Each user-installed kit contains common digital hard- ware, plus fluid-system fittings, sensors and wiring specific to the equipment type. Digital hardware includes a SmartServices expansion box that receives sensor inputs via wiring and a SmartSer- vices hub that securely exchanges data with the cloud-based analytics platform. After installation, the new sensors monitor the performance and operating/maintenance status of each auxiliary, collecting data and operating information specific to the auxiliary type. For example, sensors on the TCU can monitor coolant pressure, temperature and flow rates, while those on vacuum pumps and conveying systems will monitor air flows and speeds, vacuum levels and the like. At the same time, sensors will also monitor for operat- ing alarms, track maintenance alerts, and observe the vibration and temperature status of motors for anomalies that could signal possible problems. “Adding a SmartServices sensor kit to an auxiliary unit that does not have a computerised control dramatically simplifies monitoring and saves maintenance,” says Alan Landers, Product Manager. “Consider maintenance of a vacuum pump, for example. With SmartServices, you can establish a norm for pump vibration, then build high and low limits around that norm. The system will then track vibration automatically, offering regular reports or sending a text or e-mail alert to designated personnel if the level begins moving out of limits. Timely data like this can help save preventive maintenance by clearly indicating when maintenance is required. The alternative is to manually observe, measure, then ‘guesstimate’ when preventive maintenance is needed.” Conair has also developed the TrueRate system for automatically tracking changes in resin invento- ries, which simplifies dispensing. The company adds that the new TrueRate intelligent inventory tracking system automatically monitors changes in the inventories of up to 500 different user-specified resins or flowable powders in a processing plant. Developed as an alternative to the use of single-


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component batch blenders for resin inventory measurement, the new TrueRate system utilises highly accurate gravimetric measurement. The TrueRate system is available in two sizes, consisting of an 8 inch weighing ring equipped with two load cells, or a 12 inch ring equipped with three. Both configurations connect to a separate electrical control panel containing a PLC. The weighing ring is mounted below a material loader or receiver but above a container or bin, where it uses resin information provided by the user to calculate the change in weight of the loader/ receiver precisely before it discharges the material through the ring and into the container.


Monitoring and metering The system can operate in two modes. In default or “totaliser” mode, the TrueRate system continuously and automatically measures the total resin flow through the receiver to a bin or container below. While doing so, it can display the weight for each load cycle, tabulate a running total (in lb or kg), and calculate the total throughput rate for a period of time (lb/hr or kg/hr). In job (active) mode, the system adds an optional discharge valve to the weighing ring. This enables the TrueRate system to meter and dose a specified amount of material from the receiver mounted above into a bin or vessel located below. The system senses the amount of material accumulating in the vessel and uses a pneumatic cylinder to close the discharge valve as soon as the correct amount has been dispensed. The cylinder reopens the valve and the receiver cycle resumes when the TrueRate is ready to measure the next batch. The system can be programmed and


controlled in three ways. Firstly, with an optional 4.3 inch touchscreen built into the system’s electrical control panel; with a Windows-based PC running a virtual network client viewer connected via Ethernet cable to the panel; or with both. Mode selection and programming is simple. So too is connecting


Right: The weighing ring in Conair’s TrueRate system is mounted below a material loader or receiver but above a container or bin, where it uses resin information provided by the user to calculate the change in weight of the loader/receiver precisely before it discharges the material through the ring and into the container


IMAGE: CONAIR


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