Out-Of-Autoclave Manufacturing (OOA)
We are one of the largest and most experienced companies specializing in OOA manufacturing processes operating 7 ovens which are 30 feet (10 meters) long, and various smaller specialized ovens.
Typically considered as a low volume manufacturing technology, our OOA technologies and facilities are capable of the highest output of oversized OOA parts which meet or exceed OOA standards for commercial aviation parts. Our highly skilled employees have experience in both low and high volume OOA production manufacturing , ranging from small to large composite structures or components, including filament wound and braided structures. Our prepreg technologies include 4 International patents and a full understanding of production using single axel and woven prepreg aramid fibers.Aside from being one of the only companies in China to use renowned Torcaya Prepreg Carbon - supplier to Boeing, SEG also manufactures prepreg cloth onsite The resulting OOA laminate has a precisely controlled resin volume (+/- 2%) and will be 20-30% stiffer and stronger than an equivalent-thickness wet laminate.
Sino Eagle Groups OOA propriety molding technologies offers dimensionally stable, high performance parts with low tolerances. Our company offers prepreg OOA manufacturing solutions and skills to companies and industries in high tech marine, aviation, recreation, and alternative energy industries. A testament to our autoclave abilities include being the official manufacturer of the highest technology precision manufactured carbon rowing shells used in the 2004; 2008 and 2012 Olympic Games.
Typical OOA process involves the layup Individual sheets of prepreg material being placed in an open mold. The material is covered with release film, bleeder/breather material and a vacuum bag. A vacuum is pulled on part and verified before the entire mold is placed in an oven. The part is cured with a continuous vacuum to extract any entrapped gasses from laminate. This process is commonly used in the aerospace industry because it affords precise control over the molding process due to slow curing times, and delivers optimal strength to weight ratios with exact laminate geometric forms needed to ensure strength and safety in the aerospace industry.
Further reading on Out Of Autocalve manufacturing for aircraft can be found in OUT-OF-AUTOCLAVE MANUFACTURING OF COMPOSITE AIRCRAFT SANDWICH STRUCTURES by J. Kratz and P. Hubert from McGill University, Department of Mechanical Engineering, where "the quality of sandwich structures was investigated for the out-of-autoclave prepreg processing method. The resin curing and rheological behaviour were characterized. The pressure inside a honeycomb core during cure was monitored. Representative sandwich panels were manufactured under different curing conditions and analyzed for quality".