Extrusion 5-2017

61 Extrusion 5/2017 ➠ Motan Colortronic Limited www.motan-colortronic.co.uk The units can be supplied with single conveying units or a mini central system built in to the dryer, ensuring a very flexi- ble unit. The touch screen control is compact and easy to use, whilst the solid state relays and high quality parts ensure optimum reliability. The control can be connected to a Motan Colortronic control report and vi- sunet. The heat insulated drying hopper has a large cleaning opening with sight win- dow so cleaning the hopper is extremely easy and simple, reducing down time to a minimum. n Motan Colortronic Limited has launched a new line of EMA fully adapti- ve smart dryer. The new mobile single hopper unit builds on the proven ETA Plus technology Motan Colortronic use on central drying systems with multiple hoppers. The EMA dryers are specifically designed to offer consistently low dewpoint air to a drying bin of 60, 100 and 150L whilst reducing energy consumption to a mini- mum. The dryers are available with fully auto- matic air flow control, saving further energy and automatically creating an an- ti-stress system for the material. New Smart Dryers ➠ Davis-Standard, LLC www.davis-standard.com/aftermarket David Sacks (left) and Jonathan Sacks (right), co-owners of Tempo Products, with the Davis-Standard extruder that is back to optimal production rates thanks to a new feedscrew ders that come in before 4 p.m., thus the importance of consistent, high-rate pro- duction. The newly installed feedscrew is a replica of the previous screw except with a harder finish. “We got a lot of mileage out of the first feedscrew, and are grateful Davis- Standard was able to accommodate this rushed delivery. We definitely plan to do more frequent feedscrew and barrel checks to avoid this issue in the future,” added Sacks. Davis-Standard offers a complete line of aftermarket services to support feed- screw and barrel efficiency. Factors to consider include feedscrew, barrel and drive alignment, barrel heating uniformi- ty, materials being processed, improper barrel support and corrosion. Periodic ins- pections at 90- to 180-day intervals are recommended. The two primary me- thods for evaluating feedscrew output loss include the accurate method and ap- proximation method. The accurate me- thod compares current screw output with production benchmark output, which is established upon feedscrew installation. The approximation method involves mea- suring the feedscrew, calculating the re- sultant added screw-to-barrel clearance and estimating the output loss from the added clearance. This technique requires approximately 24 hours of downtime while the feedscrew is being removed, cleaned and measured. Following are the guidelines when using the approximation method. A measure- ment of .010 to .015 inches (.25 to .38mm) plus the original feedscrew and barrel clearance is indicative of wear, but the condition is not critical. A measure- ment of .020 to .030 inches (.5 to .76mm) plus the original screw and bar- rel clearance indicates feedscrew or bar- rel replacement should be considered. When the measurement reaches .040 to .050 inches (1 to 1.3mm), this is severe wear and it is essential to replace the feedscrew or barrel, or both.