PAWCATUCK, Conn.—Davis-Standard L.L.C. recently installed a technical cell complete with extrusion and straining equipment at its headquarters facility in Pawcatuck to help its customers improve their processes.
The technical cell supports processes ranging from hose, automotive seals and architectural gaskets to in-line straining and pressure stabilization applications, said Joe Wnuk, Davis-Standard vice president of elastomer and profile systems.
"The cell is available for our customers to run trials for screw designs, for gear pump trials, and also for straining with gear pump applications," he said.
Some of the benefits of the screw trials, Wnuk added, include increased output rates, lower extrudate temperatures, and options for fine mesh straining and vacuum venting.
Equipment in the technical cell includes the firm's flagship DSREV rubber extruder with a model 2000 crosshead and an Uth roll-ex brand 70 gear pump/strainer system with a two-roll feeder.
The DSREV extruder is a preconfigured machine with feedscrew and head zone direct injection temperature control units, a compact base, and simplified cooling and wiring systems. The firm said other advantages include touch-screen controls, process data acquisition and machine components that are easily accessible. It added that the Model 2000 hydraulic crosshead reduces scrap and enables faster start-up times.
When coupled with the gear pump made by Germany's Uth GmbH, Davis-Standard said processors can isolate high pressure and achieve pressure stabilization. The gear pump is equipped with an Uth two-roll feeder that can be used as a stand-alone device for fine mesh straining or for cold feeding. Wnuk said Davis-Standard is the exclusive distributor of Uth products in North America.
The Davis-Standard vice president said the market segments driving the machinery company's growth include automotive hose and weatherstripping, and medical silicone tubing.
The main reason for growth with its automotive hose customers, he said, is multilayer technical developments for fuel and turbocharger hose.
On the auto sealing side, he said there had been much consolidation among producers over the past eight years or so, leaving the sector with large amounts of extra equipment, resulting in overcapacity in the sector. "The installed capacity of machinery has, in some cases, reached the limit, and now we see new lines being put in," Wnuk said.
Davis-Standard for some time has supplied turnkey systems for production of silicone tubing. He said the equipment is vertical cure, primarily for medical applications, with the materials being strip-fed silicone, typically in 50-70 durometers.
In this area, Wnuk said the company has seen a lot of expansion in the Asia-Pacific region, both for North American suppliers doing business there, but also with domestic rubber product makers entering the silicone tubing market. That growth primarily is from China, but also in such nations as Taiwan and South Korea.
Looking forward, he said the firm is optimistic, with a "reasonably strong pipeline of active quality projects."