Plastics News Show Daily - April 5, 2012 - (Page 11)

PLASTICS NEWS, April 5, 2012 11 Linde unveils improved pressure booster Presus N10 high-pressure liquid-nitrogen pressure booster aids gas-assist injection molders By Roger Renstrom PLASTICS NEWS CORRESPONDENT ORLANDO, FLA. — Linde LLC (Booth 61051) introduced a Presus N10 high-pressure liquid-nitrogen pressure booster to help gas-assist injection molders improve efficiency and quality. Parent firm Linde AG, an international industrial gases and engineering company, conducted beta tests with potential customers in Germany, the Czech Republic and Poland after one site conducted trials with a prototype beginning in 2010. In the initial test, injection molder Engel Formenbau und Spritzguss GmbH of Sinsheim, Germany, worked with the Presus N10 prototype in an effort to reduce scrap and downtimes and shorten cycle times. “We are seeing interest in the pressure-boosting device,” said Andreas Praller, plastics industry applications manager for Linde in in a mold and improve production of very thin parts, molds with small cores or areas with material accumulations. Use of carbon dioxide can reduce cooling and cycle times, Praller perhaps as much as 50 percent. Linde provides the spot cooling feature to automotive makers in molding, extrudEurope and is starting to introduce ing and foaming the concept to those in the U.S. au- applications. Globally, Mutomotive and medical markets. Linde’s development of the nich-based Linde about spot cooling technology began employs about six years ago, but “we 50,500 and had needed to convince customers 2011 sales of 13.9 euros that it gives them more flexibili- billion ($18.1 billion). ty,” Praller said. For the plastics industry, Linde’s cryogenic gas technol- Trials with a prototype of ogy can provide rapid cooling Linde’s Presus N10 high-presusing an inert gas such as car- sure liquid-nitrogen pressure bon dioxide or nitrogen for booster began in 2010. The liquid pump can boost nitrogen to 4,500 pounds per square inch and deliver flow rates up to 4,600 cubic feet per hour. The highest flow rate is about five times higher than state-of-the-art gas compressors. Unterschleissheim, Germany. The liquid pump can boost nitrogen to 4,500 pounds per square inch and deliver flow rates up to 4,600 cubic feet per hour. The highest flow rate is about five times higher than state-of-the-art gas compressors. Separately, Linde in North America targets manufacturers of extruded polystyrene foam for a precise-dosing 7,250-pounds-persquare-inch metering system. Linde’s patented DSD 500 system reduces the use of hydrofluorocarbon and hydrochlorofluorocarbon blowing agents with the controlled addition of precise amounts of carbon dioxide through a proportional control valve. The system keeps carbon dioxide gas consumption low. Many foam manufacturers in Europe use the DSD 500 system and related pressure boosters. Linde makes it easy for foam manufacturers to capitalize on the advantages of using carbon dioxide while avoiding hydrocarbon foaming agents, said James Stanley, recently named program manager for industrial applications with Linde LLC in Murray Hill, N.J. The company offers a way for spot cooling of injection molds with liquid carbon dioxide as a supplement to conventional cooling. The system can cool hot spots Photo courtesy of Linde LLC  http://nissei-asbus.com http://nissei-asbus.com http://www.nisseiasb.co.jp/en/

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Plastics News Show Daily - April 5, 2012

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