Infrared Heating helps to ensure quality in the manufacture of composite structures for airplanes
An important work package already underway at the site is the manufacture of the all-composite rear wing spars for the Airbus A350 XWB. Each of the three rear wing spars is manufactured by laying up pre-preg carbon composite tape on a mandrel and then curing the assembly in an autoclave. However, such complex lay down operations can sometimes produce wrinkling of the final surface because of voids and excess resin between plies or laminates. One proven answer to this problem is de-bulking, which involves enclosing the composite structure in a vacuum bag at various stages in its manufacture and then compacting or squeezing out of air and volatiles between plies or pre-preg laminates under moderate heat and vacuum to insure seating on the mandrel, to prevent wrinkles, and to promote adhesion.
GKN Aerospace’s engineers decided that de-bulking could provide significant benefits and asked Heraeus to carry out initial trials using infrared emitters to provide the required heat. These were followed by on-site trials using a portable infrared system at Western Approach and these were so successful that a prototype system was supplied
The prototype system was finally replaced by a scaled-up 465 kW production system, where each of the three heating sections now has seven controllable zones to provide precise surface heating.
Heraeus, the precious metals and technology group headquartered in Hanau, Germany, is a global, private company with more than 160 years of tradition. Our fields of competence include precious metals, materials, and technologies, sensors, biomaterials, and medical products, as well as dental products, quartz glass, and specialty light sources. With product revenues of €4.8 billion and precious metal trading revenues of €21.3 billion, as well as more than 13,300 employees in over 120 subsidiaries worldwide, Heraeus holds a leading position in its global markets.
Heraeus Noblelight GmbH with its headquarters in Hanau and with subsidiaries in the USA, Great Britain, France, China and Australia, is one of the technology- and market-leaders in the production of specialist light sources. In 2011, Heraeus Noblelight had an annual turnover of 103 Million € and employed 731 people worldwide. The organization develops, manufactures and markets infrared and ultraviolet emitters for applications in industrial manufacture, environmental protection, medicine and cosmetics, research, development and analytical measurement techniques
Press: Marie-Luise Bopp
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