TECHNOLOGY | MATERIALS HANDLING
pellets are captured on a proprietary dosing wheel, where they are optically counted using a light signal and dispensed. The feeder has an 8-inch multi-function touch-
screen with a graphical interface. One control can operate one or two feeders. Two Micro Feeders can work together, or one Micro Feeder can be paired with a larger, standard TrueFeed feeder. TrueFeed Micro Feeders feature 3D-printed metal-powder construction and an extremely compact design – less than 200 mm in length. Standard models are equipped with a clear, top-mounted material hopper, suited for hand feeding, but may be optionally equipped with a mini loader that fits atop the hopper and connects to an air supply. Moretto is also proposing a series of solutions
dedicated to “micro” conveying for the feeding and conveying of small quantities of technical materials. These have very compact feeders, ideal for installation on stand-alone machines, on drying and dosing systems or directly on the throat of the processing machine. These conveying systems include models specifically indicated for the use in clean rooms. For micro-dosing, Moretto offers DPM, available in single-component versions and up to 4 hoppers. Pulsed dosing is immune to vibrations and does not require a mixer thanks to the simultaneous dosing of the components, the company claims. DPK is a compact precise weight-in-loss dosing
system, suitable for the dosing of small amounts of masterbatch or additives. Dosing accuracy of up to ± 0.03% is possible. The masterbatch or additive to be dosed is contained in a hopper built in a specific transparent resistant acrylic material, free from electrostatic charges, which makes immedi- ately visible the content material and the level of load and avoids the stop of material on the hopper walls. The hopper is easily removable without the use of tools and, together with the intelligent storage and recognition system of the masterbatches alongside
Left: The new TrueFeed Micro Feeder from Conair makes it possible to count and dispense standard and micro-pellets one-by-one, giving processors the ability to manage ultra-con- centrated additives or to feed very small injection moulding processes with precision and cost-saving accuracy
60 INJECTION WORLD | October 2019
Right: MGF feeders from Maguire
the machine, the recipe change is even more immediate. DGM Gravix batch gravimetric dosing units
incorporate a “Vibration Immunity System” and “double eyelid system” to enable them to dose with a precision up to 0.01%, even on machines constantly vibrating. They cover dosing require- ments for granule, powder and flakes materials. Applications dedicated to micro dosing, such as Rotopulse, make these machines extremely flexible, Moretto claims. Maguire’s MGF gravimetric feeders now have
what the company calls a 100% colouring feature, specifically for injection moulding. The feeder, for dosing small quantities of concentrate or additive into the injection machine barrel, uses two signals, one during screw recovery and one during injection. “This ensures 100% dispersion achieved through a control algorithm to achieve consistent colouring, so all material in barrel is now coloured, eliminating gaps,” says the company.
Intelligent controls Motan-Colortronic highlights its new AlarmCollec- tor, which it says is a simple and cost-effective way to centrally display alarms in the system. “In addition to the ease of use and setup of the digital display of alarms, the AlarmCollector boasts a sleek design and user-friendly interface,” it says. The output of the alarms is possible on any Internet- enabled device. Moretto highlights One Wire 3, which automati- cally manages and supervises the entire conveying process of small or large quantities of material, using advanced FIFO (First In First Out) logic. One Wire 3 also controls devices designed to help optimise conveying and feeding. These include the Dolphin manifold unit, which automatically sup-
www.injectionworld.com
PHOTO: MAGUIRE
PHOTO: CONAIR
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