Making rigid tubular drive shaft with high shock resistance by winding prepregs onto mandrel and heating, employs temporary wrapping causing deaeration and consolidation

摘要

Prepreg bands are first rolled onto the mandrel. They are deaerated and consolidated uniformly. This is achieved by consecutive spiral wrapping with a thermoplastic band under tension. The thermoplastic band is unwrapped. Further layers are added successively, in the same manner. Prepreg bands are first rolled onto the mandrel. They are deaerated and consolidated uniformly. This is achieved by consecutive spiral wrapping with a thermoplastic band under tension. The thermoplastic band is unwrapped. Further layers are added successively, in the same manner. The pre-impregnated band is isotropic and precompressed. Its fiber orientation is /! 45 deg . Fiber orientation is between 0 deg and 90 deg . Ends of successive bands are offset by 180 deg . The band, of thermoplastic cloth, is wrapped under pretension. The mandrel is heated steadily during wrapping, its temperature being about 60 deg -70 deg . Following the prepreg layers an external envelope is added. This comprises is at least one layer of non-impregnated carbon fiber, followed by a layer of prepreg cloth /-/ glass fibers. Finally, an auxiliary air extraction cloth is added (this prolongs air removal and compression).