Plastics Technology

OCT 2018

Plastics Technology - Dedicated to improving Plastics Processing.

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demonstrated at the June event on the new EcoPower Xpress 500 machine. Among the many parameters monitored by the system are oil temperature, level, moisture and particle count; water quality, flow and temperature; and hydraulic-pump pressure, vibra- tion and oil leakage (with color coding of acceptable/not-acceptable conditions). Also monitored are the injection unit's stroke, vibration and metering torque (accom- plished by monitoring the screw tip's torque and forward speed). On the clamp, sensors monitor tiebar stretch, stroke, and vibration of the moving platen and frame. Sensors in the gearbox measure contamination in the gears to determine when lubricating oil needs to be changed. And the electrical cabinet has sensors for temperature, humidity and air Complete Blown Film THE X -DIE & High Performance V -RING ALPINE AMERICAN T H E B L O W N F I L M E X P E R T S T: (508) 655-1123 F: (508) 655-9337 flow, as well as smoke detectors, and confir- mation of proper connections to the power supply and B8 controller. Overall energy consumption and ambient temperature and humidity are also monitored. For any of these parameters, the user can inspect a graph of readings over time and zoom in on any time period of interest. Good/bad limits can be assigned to moni- tored variables, and those limits can be set specific to particular molding jobs. Centralized control of all components of a work cell is a prominent feature of Wittmann 4.0. One new software feature in development is digital mold data sheets, in which the setup for a molding job will generate a list of the precise auxiliary equipment—chiller, dryer, blender, etc.—required for that job. Coordination of auxiliaries connected to a Wittmann Battenfeld B8 machine control, as well as automatic commmunica- tion of produc- tion, process and quality data to a central MES computer system (Wittmann works with MPDV in Europe, IQMS in North America) contribute to the growing trend to individualized production, "mass customization" as some call it. This was demonstrated at the June event in production of coat hangers using Wittmann Battenfeld's Airmould gas-assist technology. After demolding by a W918 robot with new servo wrist, the polycar- bonate hanger was presented to a digital inkjet printer mounted on the horizontal beam of the robot. As the robot moved the part past the printer nozzle, printing occurred "on the fly" at a speed coordinated with the robot speed. In June, the hangers were printed to order with visitors' names. In actual production, they could be printed with batch or serial numbers in the form of barcodes or QR codes. These could be Condition monitoring system (CMS) for predictive maintenance monitors around 30 parameters in and around the machine. 16 OCTOBER 2018 Plastics Technology I N J E C T I O N M O L D I N G Close -Up On Technolog y

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