Making flanged fibrous pipe composites commences with angled winding onto cores, forming layered structure, followed by end trimming and rotating to raise flanges, with assistance from external pressing molds defining final geometry

摘要

A layered structure (8) is wound on the shaft- (1) supported cores (2, 3, 4) at a winding angle of 5 deg -45 deg . End cores (3, 4) define the portions to be flanged, the center core (2) defining a substantially-unchanging region. Winding complete, the winding end-return regions are cut off at gaps (14). Gaps are formed by spacer washers (7) between discs (5, 6) and outer cores (3, 4). The central region of the composite is pressed by an outer collar mold acting against a stop, holding the composite both in place on the core, and to the correct dimensions. Before hardening, the assembly is rotated to lift the edges of the composite (e.g. centrifugally). These are further widened and pressed by end molds with stops, to define the final form of the flanges. An Independent claim is included for corresponding forming equipment.