TECHNOLOGY | MATERIALS HANDLING
passed on to other appliances either by USB stick or by special GraviLog software. Moreover, a Gravimax operating in the SmartRegrind mode will automati- cally adjust the formulation – depending on the available quantity of granulate to be blended. The company says that the blenders have RTLS
Above: Motan- Colortronic has expanded its universal material flow and selection system, the Metrolink
compatible with the stainless steel versions and are shatter-proof and anti-static, resulting in significant- ly less maintenance. The company has also introduced a gravimetric dosing module for the Spectroflex V. It uses the same base and exchange modules and is also suitable for granules, regrind, powder and flakes. Depending on the feed material and the unit version, throughputs from 0.7 to over 3,000 litres per hour are possible with small dosing tolerances. Free-flowing and non-free-flowing materials can be dosed. Little training is required for production or to switch between materials and the two dosing technologies. Due to the exchange modules there is no cleaning time required for material changes and changing the set-up is quick and easy. The gravimet- ric dosing unit is controlled through GRAVInet SF. This is a network-compatible control for up to two dosing modules. The precise DMS load cells are equipped with separate amps and CAN-bus interfaces – making them ideal for use in modern production environments, says the company. Wittmann has added new functions to its
Right: Motan- Colortronic has introduced a gravimetric dosing module for the Spectroflex V
Gravimax blenders to improve operation and part quality. The blenders are available for a wide range of throughput rates from 60-200 kg/h and come with touch screen control terminals. All parameters can be set and retrieved via the display. The luminous ambiLED signal mounted on the front displays the appliance’s current status. The control system allows the operator to save compound formula- tions together with the appropriate blending processes. These formulations can be
64 INJECTION WORLD | October 2018
(Real Time Live Scale) weighing that enables a consistently reliable blending result. This is a metering process carried out in two steps, progres- sively becoming more accurate until the target weight has been reached. Following a rapid meter- ing phase just before reaching the target weight, the residual quantity of material is subsequently added by several short metering impulses. In this way, any overdosing of ingredients is reliably prevented. The material hoppers have been designed so
that the material can flow freely inside them. The hoppers can be equipped with fold-back lids to allow for material loaders mounted on top to be tilted back, which facilitates cleaning of both the material loader and the hopper. The designation SL stands for ‘Stationary Lid’. This structure allows the hopper to be removed without having to detach the material loader. Whenever the material hopper – designed a little higher for this purpose – is removed, the material loaders mounted on top of the stationary lid can remain in place. Every Gravimax is equipped for easy connection to a central computer, a laptop or PDA device with an Ethernet interface. In this way, data transmission can also be achieved by OPC UA via a licence acquired later. If no reporting system is already in place, Wittmann offers its GraviLog software as a solution for data recording. This software package enables the acquisition and administration of all data from every Gravimax blender
present in a production facility, such as com- pound formula manage- ment, material consump- tion or visualisation of fluctuations. Models are also
prepared for Wittmann 4.0 - the standardised communication system from Wittmann for all appliances in an injection moulding
production cell. In this way, the Gravimax can be
connected with the processing machine and operated from there as well, with operation being effected via the control panel, which is transmitted
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