Double degassing is nothing new in single-screw extruders. However, until now, the degassing connections were located directly next to each other and served to increase the overall degassing capacity at a single area. In contrast, Dual Vent Technology (DVT) creates two independent degassing areas along the extruder's processing unit. This enables more effective removal of gases.
The completely redesigned screw concept enables the conditions to separate degassing chambers without changing the familiar user-friendly operation of the single-screw extruder. “Combining our expertise within the group, we have succeeded in developing an innovative concept that combines two separate degassing zones on one screw,” explains René Hartmann, Regional Sales Manager at battenfeld-cincinnati. Thanks to this separation, volatile substances with low partial pressure can be effectively removed from the melt in the first intensive degassing zone, while volatile substances with higher partial pressure can be removed in the second zone. This enables to remove significantly more moisture and other volatile components from the melt than with one degassing zone. This in turn ensures high product quality, among other things, by preventing bubble formation. "For the processing company, this reliability means, on the one hand, that it hardly needs to pre-dry its material, thus saving on equipment and the associated acquisition and Energy costs. On the other hand, the new double degassing extruder allows them to use untreated residues and regrinds and still extrude high-quality semi-finished products," says René Hartmann, explaining the increased flexibility in terms of material use.
With this further development, battenfeld-cincinnati is initially focusing on ABS processing; however, depending on the material and vacuum technology, other functions are also possible, such as the removal of odors using the new Dual Vent Technology.
About battenfeld-cincinnati
battenfeld-cincinnati is a leading manufacturer of energy-efficient and high performance extruders and complete extrusion lines according to customer specific requirements. battenfeld-cincinnati offers tailor-made solutions for a wide range of applications in the field of pipe, profile, sheet, thermoforming sheet and pelletizing from a large portfolio of single- and twin-screw extruders, dies, downstream equipment, calanders and calander feeders. Customers are served by production sites in Germany, Austria, China and the USA, as well as a comprehensive global sales and service network.
battenfeld-cincinnati is a company of the Davis Standard Corporation, USA, and stands for quality and sustainability in plastics extrusion worldwide.
www.battenfeld-cincinnati.com
