Patent ID: 8813626
Filing Date: 2014-08-26
Classification: B29C,B29L,B32B,D04C,D10B

Abstract:
1. A manufacture method of three dimensional (3D) braided composite tube with a throat section, comprising: providing an assembled mandrel comprising an upper mandrel and a lower mandrel, wherein the assembled mandrel has a middle portion which is narrower than two ends of the tube, separating the lower mandrel from the upper mandrel and braiding an 3D braided inner layer on the upper mandrel, then tightening the 3D braided inner layer to the upper mandrel by binding devices; combining the lower mandrel with the upper mandrel, and fixing the lower mandrel to the upper mandrel by a fixing device, then tightening the 3D braided inner layer to the lower mandrel by another set of binding devices; removing the binding devices at the middle portion of the assembled mandrel, followed by winding fiber yarns from the middle portion of the assembled mandrel toward two ends thereof to the end binding devices respectively to form a fiber yarn outer layer over the 3D braided inner layer; and infiltrating resin into the 3D braided inner layer and the fiber yarn outer layer, and increasing temperature to cure the resin to obtain a composite tube.