technology | Machinery ANCILLARIES
Drying control technology optimised for single bins
Motan-Colortronic introduced the latest version of its ETA Plus drying technology at this year’s Plast, making it available for use with single drying bins. This control solution for air flow regulation has been optimised in order to minimise energy consumption, for single drying bins with volumes of 3,000-13,000 litres. ETA plus has already proved itself effective with air dryers of the Luxor A series. Automatic adjustment of air volume to the entry tempera- ture of the relevant material leads to more consistent drying. The only air volume produced is that required for the drying process, says Mo- tan. ETA Plus does not require butterfly valves to control air flow. The system combines the drying function
with air flow control. Process air quantity and the adjustment of the drying temperature are controlled at the same time as the energy requirement of the material throughput. It avoids over- or under-drying, and claims a 60% reduction in energy consumption, compared with conventional dryers. Interactive menu navigation is
available via a TFT touch-screen colour monitor. Users can select all essential parameters for their chosen material from a pre-load- ed database. In-house recipes can be stored in a separate database. ❙
www.motan-colortronic.de
CO-EXTRUSION Three methods for pipe and profile co-extrusion
High Tech Extrusion presented three separate methods of co-extrusion at the recent Plast exhibition in Milan. Co-extrusion allows the cost of
materials to be reduced, says the company, by making the core of the pro- file or pipe from a recycled or other cost-effective material: material costs of three-layer pipe can be reduced by 30%, it says.
In its ‘piggy back’ solution, for
profile co-extrusion, a conical or single screw co-extruder is mounted on the main extruder. A newly developed clamp system for the piggy back solution means that the co-extruder can be adjusted in all directions, for perfect positioning. This version is cost-effective and
saves space, says High Tech. It recently helped a UK customer to modify its old extrusion lines into co-extrusion lines, by mounting a conical extruder on the
38 PIPE & PROFILE EXTRUSION | May/June 2012
existing (competitor’s) extruder. Output of the Con 50 conical extruder
is 125kg/h for PVC window profiles, and 150kg/h for rigid-PVC profiles. To increase
output, it is working on a solution for its Con 63 as co-extruder. In its second method, also for profiles, the extruders are positioned next to one another and the co-extruder is mounted on a pillar. High Tech offers solutions for its Co32 single screw co-extruder, and its Con 40 and 50 conical extruders. Its third method, for co-extrusion of
pipe and siding, sees the extruders positioned beside one another. The co-extruder is mounted on wheels and can be moved easily. This is suitable for all existing extruders in various combinations. Maximum output for PVC siding co-extrusion is around 1400kg/h, with lines running at 45m/min. Depending on the combination of extruders, pipe head, pipe dimension, pipe material and formulation, an output from 400 to 1600kg/h is possible. ❙
www.ht-extrusion.com
www.pipeandprofile.com
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