High-Performance Composites

NOV 2014

High-Performance Composites is read by qualified composites industry professionals in the fields of continuous carbon fiber and other high-performance composites as well as the associated end-markets of aerospace, military, and automotive.

Issue link: https://hpc.epubxp.com/i/405736

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Page 57 of 67

APPLICATIONS 5 6 | H I G H - P E R F O R M A N C E C O M P O S I T E S A recent study by researchers from the University of British Columbia, Depart- ment of Materials Engineering, and Mit- subishi Heavy Industries, Nagoya Aero- space Systems (Nagoya, Japan), shows that airfow inside an autoclave is rarely uniform, and that heat transfer coeffcient measurements made with rod calorime- ters vary widely, particularly when com- paring regions above and below a test tool. Despite these results, autoclaves are unlikely to be replaced at many com- panies because of the capital investment they represent. However, Regloplas USA (St. Joseph, Mich.) has demonstrated a method for overcoming poor tempera- ture uniformity, says Kip Petrykowski, the company's director of national sales, "and reducing autoclave cycle times, through the use of pressurized-water mold tem- perature controllers." The approach uses the vessel in concert with molds plumbed for pres- surized-water heating. "Heated, pres- surized water is proven as the most Combining curing processes for faster part production consistent and most energy-effcient method for heating tools, compared to air, steam, cartridge or oil heating," Pet- rykowski claims. "And it's been success- fully qualifed in commercial aircraft air- frame part production." He recently conducted a study com- paring conventional autoclave process- ing vs. water-heated tools inside the Control unit This control unit, the Regloplas P160M, was developed by Regoplas USA (St. Joseph, Mich.) to heat and cool water, and then circulate that water through a mold plumbed for pressurized-water heating and cooling. In tests, autoclave cure of a part heated and cooled with the Regoplas system used 1/20 th of the energy consumed during a conventional autoclave cycle on an identical composite part. System setup A technician fastens plumbing attachments that will deliver pressurized water to pipes positioned beneath this test panel. The vacuum hose attachment is seen on top of the bagged layup. KYK Carbonization Furnaces • Specifically designed for winding carbon fiber with minimal damage to the filaments • A wide variety of winders to choose from: manual doff, automatic doff, dual cop winding, electronic control, etc. • Supplied for single position or several hundred positions • Electronic tension control for high accuracy precursor tensioning • Supplied for carbon fiber production with optional loading systems • Lab scale creels for R&D facilities can also be supplied IZUMI INTERNATIONAL, INC. 1 Pelham Davis Circle, Greenville, SC 29615 Tel: 1-864-288-8001 Fax: 1-864-288-7272 E-mail: hpc@izumiinternational.com Website: www.izumiinternational.com Precursor Creels • Carbonization and graphitization furnaces for carbon fiber production as well as lab scale pilot lines • Each furnace is custom designed with the customer for each specific application Take Up inders Source: Regoplas USA Source: Regoplas USA

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