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Keywords of this article:  automotive 
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extruder 
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1. COPERION
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feeder 
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Bettina König (left), Global Marketing Communications Director of Coperion, and Giuseppe Martino, Regional Sales Manager of Coperion K-Tron, in front of the  Loss-in-Weight Liquid Feeder.
Bettina König (left), Global Marketing Communications Director of Coperion, and Giuseppe Martino, Regional Sales Manager of Coperion K-Tron, in front of the Loss-in-Weight Liquid Feeder.

Coperion is celebrating the 60th anniversary of its ZSK extruder series with the introduction of new, patented involute screw elements.

To significantly increase throughput rates of its first-class ZSK extruder series, Coperion has developed special involute screw and kneading elements with a new and patented cross section design.

These screw elements are ideal for highly-filled recipes (70-85% CaCO3, TiO2, mainly based on PP/PE and 20-50% talc for automotive grades) for which the dispersion rating and the incorporation of the filler represents a limitation.

Besides higher throughput rates, these involute screw elements ensure higher loading of filler, better dispersion and homogenization, lower energy consumption (SEI in kWh/kg) and a significant increase in profitability.

Comprehensive tests at Coperion's test lab in Stuttgart, Germany, showed a remarkable throughput increase depending on the recipe.

For example, when processing polypropylene (PP) and 70% CaCO3 on a twin screw extruder ZSK 58 Mc18 the new screw elements achieved a significant throughput increase from 550kg/h to 900kg/h. Similar results have been reached when processing polyethylene (PE) with 80% CaCO3 on a ZSK 92 Mc18. In this case throughput was increased from 2,200kg/h to 3,000kg/h.

Meanwhile, Coperion K-Tron is highlighting the Loss-in-Weight Liquid Feeder that allows for the combination of a broad range of pumps and tanks to constitute a reliable liquid feeding system.

Thanks to its new modular design, various pumps and tanks can easily be integrated to constitute a reliable liquid feeding system for the specific application. Although each liquid feeder is custom designed to meet the desired feed rate, the process demands, and the characteristics of the liquid, the new modular concept streamlines the layout and engineering process of a feeder, thus reducing its lead time and initial cost.

Also on display is a Twin Screw Powder Feeder with ActiFlow Technology, which is suitable for the accurate feeding of free flowing to flooding powders as well as other difficult, poorly flowing bulk materials.

The interlocking, co-rotating twin screws form pockets in which the material is transported to the feeder discharge in a controlled manner. With flooding bulk material the intermeshing screw flights act as a valve to control material flow. The self-wiping effect of the twin screw prevents material buildup on screws or discharge.

Coperion K-Tron's feeder on display comes with the ActiFlow technology that proactively and reliably prevents bridging and ratholing of poorly flowing bulk solids in feeder hoppers.

The clever flow aid device applies gentle vibrations to the hopper wall, hereby carefully activating the contained material with the optimal amplitude and frequency.

Owing to its tight integration with the feeder control it acts preventatively and only when required and thus does not additionally compact the bulk material. ATEX versions are available. ActiFlow can be retrofitted on existing loss-in-weight feeders.

Bettina König, Global Marketing Communications Director of Coperion, said Fakuma is a good place to keep in touch with customers and she is looking forward to a busy show!

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