By Ron Shinn
Battenfeld-Cincinnati unveiled two extruders at K 2025, its first single-screw extruder with Dual Vent Technology (DVT) plus the final machine in the solEX NG single screw series.
Unlike standard double degassing systems, which are located next to each other, Battenfeld-Cincinnati’s new DVT system has two independent degassing areas along the extruder’s processing unit. The company said this arrangement more effectively removes gasses.
On display was the BC 120-40 DVT model.
The redesigned screw does not change the operation of the single-screw extruder, said René Hartmann, regional sales manager at Battenfeld-Cincinnati, in a news release.
The DVT system removes volatile substances with low partial pressure from the melt in the first degassing zone. Substances with higher partial pressure are removed in the second zone. Hartmann said this removes significantly more moisture than systems with a single degassing zone. It also prevents bubble formation.
“For the processing company, this means, on the one hand, that it hardly needs to pre-dry its material, thus saving on equipment and associated acquisition and energy costs,” Hartmann said. “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.”
The solEX NG 105 is being added to fill a gap in the single-screw extruder line. The line includes the 45, 60, 75, 90 and 120 models. The 105 has a throughput range of 3,700 pounds per hour to 4,630 pounds per hour.
The solEX NG 105 is equipped with a newly developed internal water supply that needs to be filled only once with water and chemicals to control corrosion. This system prevents impurities from outside water clogging cooling channels. Also, cooling water reaches the components at a constant, low temperature.
Low cooling water temperature increases the lifespan of the engine and gearbox, a company spokesman said. Plans are for this system, which is mounted on the side of the extruder, to be added to all extruders in the future.
SolEX NG extruders have a processing unit consisting of an internally grooved barrel in combination with a matching screw and grooved bush geometry, resulting in reduced axial pressure and machine wear.
The solEX NG models achieve about 25 percent higher output when processing HDPE and up to 40 percent higher output with PP, according to the company.
Contact:
Battenfeld-Cincinnati, McPherson, Kan., 620-241-6843, www.battenfeld-cincinnati.com
