2016 | Materials handling
system that is it says is much shorter – and far easier to operate and maintain – than standard systems. LoPro, which is used to convey pellets and regrind
MTI says that its Vent Tec 2.0 aspiration system for heating/cooling mixer combina- tions control their own performance independently
technology, they can also be retrofitted to other manufacturers’ machines. At high process temperatures, even low humidity
levels can interfere with the process. This is especially relevant for PVC recipes containing hygroscopic stabiliser systems. Without high-performance aspira- tion, it may cause massive deposits on the interior surfaces of heating mixers, cooling mixer walls, extruder dies and calibration devices. The potential con- sequences can include diminished mixing quality, extruder problems and fluctuations in product quality. In these situations, Vent Tec technology provides high dehumidification rates for constant production results. It compensates for variations in raw material moisture and seasonal influences on the processing properties of the mixture, to provide high dryblend quality with ultimate humidities ranging down to below 0.05%. Vent Tec 2.0 systems continuously monitor actual
Maguire says its LoPro vacuum loading system is shorter and easier to operate than standard systems
operating conditions via key parameters such as intake air and system air temperatures, air pressure, humidity and aspiration air flow rate – and keeps aeration airflow conditions constant. In addition, the system reports wear to the process filter at an early stage, allowing preventive maintenance to be carried out.
Loading up Maguire Products will introduce a new vacuum loading
from storage to single or multiple blenders, is simpler to operate than standard systems and consists of autonomously controlled receivers that are 80% shorter than conventional material loaders and receivers. The device’s low-profile receivers protrude only 200mm (8in) above the lid of a blender, providing a low centre of gravity that minimises potential sway on fast-cycling processing machines. Each receiver is self-controlled, with no central control required. Connection and installation is simple, with plug-and- play cabling and sequential linking of components. Receivers load on a first-in/first-out basis. Vacuum is supplied from a ‘mini-central’ unit mounted on a portable floor stand or on the blender frame. The discharge or ‘dump’ flap in the LoPro receiver is
up to six times wider than the flap on traditional upright receivers, making possible a dump time of only 1-2 seconds per cycle, depending on material flow properties. Maintenance has been simplified, as all operating
components are housed in a removable module that allows the receiver to remain in place. This makes it possible to perform quick, on-the-fly cleaning and maintenance. Modules are interchangeable, allowing production to continue if service is needed. Because access is from the side of the module rather than the top as with conventional units, it is easier to check the system and access the filter. A patented blow-back system provides effective filter cleaning at the end of each cycle, eliminating need for manually cleaning the filter. “Maguire has designed the LoPro system to be
affordable, easy to use, readily installed in existing production facilities, and even adaptable to a third-party vacuum system,” said Frank Kavanagh, vice president of sales. “Its simplicity alone will enable more plastics processors to obtain the productivity benefits of an automated loading system.” The company has also developed a new-generation
controller for its Weigh Scale Blender, which has greater data processing capability than its predecessor – to enhance communications with other devices. The Maguire 4088 controller is backward-compatible with earlier control systems and operates seven times faster than the earlier 1212 controller. It also has eight times the memory, while the load cells used to weigh batch ingredients have 45 times the resolution. Options for operators include a keypad/digital thumbwheel interface or new touchscreen that is removable for remote operation, features intuitive graphical displays. Standard with the touchscreen is built-in software for a conveying system for loading
40 PIPE & PROFILE EXTRUSION | October 2016
www.pipeandprofile.com
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