PAWCATUCK, CONN. (Sept. 25, 2:15 p.m. EDT) — New screws, extrusion controls and a laboratory line developed with an Austrian company highlight Davis-Standard Corp.'s K 2001 exhibit (Hall 16, Stand A 43).
Davis-Standard will show two newly patented feedscrews, the DSB-V and DSB-VI barrier screws; both of them improve on the DSB-I screw design.
The DSB-V improves melting and output, according to the Pawcatuck company. Features include a variable-pitch barrier flight similar to the DSB-I. The solids channel has been modified to assist melting using the heat energy dissipated from the plastic, and improve the quality of the mix.
Davis-Standard created the DSB-VI to address the growing presence of groove feed extrusion in the global market. It uses a dual barrier design with a variable lead barrier flight.
In extruder controls, the company will exhibit the Mesa, Mesa Pack and Mesa Pack Pro in Dusseldorf. A Mesa Pro Pack will run a profile line during the show, at Davis-Standard's Er-We-Pa factory in Erkrath, Germany.
Meanwhile, Davis-Standard and a+g Extrusion Technology GmbH will collaborate on international projects by offering extrusion lines that combine Davis-Standard extruders with downstream equipment and tooling from a+g. During the K show, a dual-strand extruder will be running at the a+g factory in Pasching, Austria. Gerhard Folie, international business manager for Davis-Standard, said one side will extrude a U.S.-style window profile, while the other side will extrude a European-style window.
In blown film, Davis-Standard's WesJet air ring is now automated. Segmented air streams are regulated through a gateway actuator, to affect film thickness. That design eliminates unwanted heating of the die lips, which can cause die lip buildup, according to the machinery company.
“We developed this design to give processors even greater control of the gauge profile while maintaining the high performance cooling of the WesJet,” said Rick Keller, industry director of Davis-Standard's blown film systems.
Other news from Davis-Standard includes the Paragon laboratory line for making blown film. The package includes an extruder with a 1-inch diameter screw, a film tower, a winder and a controller, all mounted on casters.