MATERIALS HANDLING | MATERIALS
number of new developments for its materials handling equipment. These include making servo motors standard for additional feeders. The company says that compared to standard AC motors, the flexible servo drive provides a wider speed range, while maintaining torque. Servo motors have the advantage of having their full torque available at low speeds and having negligi- ble speed fluctuations during high torque demand situations. For these reasons, the servo drive is desirable as it eliminates the need for a second pair of screw and tube, which reduces changeover downtime of the system. Flex connections made from highly durable,
tear-resistant liquid silicone rubber (LSR) are essential for sealing upstream and downstream process. When hazardous ingredients are used, the connections prevent toxic dust from escaping. Brabender Technologie had developed a new design that provides highly flexible characteristics essential for ultra-low feed rates below 50 g per hour. The flex connection material thickness is specifically designed to be extremely thin in the flexible area and more robust where attached to the clamps. This a necessary item for precise weighing and dust control, says the company. The recently developed shaft sealing system can be used wherever screw or agitator shafts are required. Brabender Technologie has now added a purge system to its radial shaft seal. It consists of an inner pressurised chamber. This means that in the rare event of a seal leak, dust always remains in the chamber. The shaft seals act as a barrier in both directions: on one side towards the motor and on the other side in contact with the ingredient. Koch Technik has developed its own concept of a permanent central vacuum system. The company says that it offers a particular advantage over classic central conveying systems operating with a start-up phase and FIFO principle. The system can operate up to eight separators at the same time and convey many times the amount of material. Throughput is between 2 and 10 tonnes per hour. The initial investment may be a little higher, but from an energy point of view, the permanent central vacuum has a huge advantage, says Koch. Signifi- cantly less energy is needed for the same perfor- mance. In addition, the maximum possible throughput is many times higher. The company adds that it has also implemented
an interesting, energy-saving solution for some cus- tomers who have installed combined heat and power (CHP) plants for energy generation. A heat exchanger transfers excess energy from the CHP in the form of warm water or air to the drying systems.
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Maguire dryer controls get new software
IMAGE: MAGUIRE
Along with materials handling technology, suppliers are developing and refining controls of other ancillary equipment. Maguire says it has made its Ultra dryer touchscreen controller even more powerful and feature rich by integrat- ing its FlexBus Lite software into the platform’s Arm Cortex microprocessor. FlexBus Lite is a standard feature on all touchscreen blender controls, and on the Ultra dryer controls it allows users complete pump and receiver control in a cell, in a user friendly and straightforward control system. FlexBus Lite allows control of one vacuum pump and full system functionality control of up to ten materials receivers. The icon based touchscreen shows each of the receiver’s activity in real time, whether it is calling for material, receiving material into it, or showing material discharging. The pump and receiver settings can be easily adjusted in real time by the operator. “With the dryer, vacuum chamber and
material retention hopper on load cells – you are able to completely regulate the drying rate to the process rate. This allows the operator to program a shutdown to any specific day and time,” says Frank Kavanagh, vice president of sales and marketing. “The control system then monitors the rate so
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that the loader will stop calling for material and the dryer will be empty. With the control system monitoring the rate, this makes material changes even easier.”
September 2021 | INJECTION WORLD 47
Above: FlexBus Lite software is integrated into Maguire’s Ultra dryer touchscreen controller
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