초록 ▼

A blank consisting of a spirally wound fiber for use in the manufacture of a fiber reinforced article of composite material is made by winding the fiber onto a helical track on the surface of a frusto-conical spindle, covering the wound fiber with a thermoplastic binder which sets to form a frusto-c

A blank consisting of a spirally wound fiber for use in the manufacture of a fiber reinforced article of composite material is made by winding the fiber onto a helical track on the surface of a frusto-conical spindle, covering the wound fiber with a thermoplastic binder which sets to form a frusto-conical shell encasing the fiber, removing the shell from the spindle and placing the shell with its base on a plate, and heating the shell starting from its base so as to soften it and cause it to progressively collapse onto the plate to form a disc comprising a spirally wound fiber. If necessary the collapse of the shell may be assisted by pressing on the shell in a direction towards the plate.

대표청구항 ▼

[ We claim:] [1.] A method of making a disc consisting of a spirally wound fibre, comprising the steps of:providing a frusto-conical spindle having a helical track on a surface thereof;winding a fibre on to said helical track on said frusto-conical spindle;pouring a thermoplastic binder in a liquid

[ We claim:] [1.] A method of making a disc consisting of a spirally wound fibre, comprising the steps of:providing a frusto-conical spindle having a helical track on a surface thereof;winding a fibre on to said helical track on said frusto-conical spindle;pouring a thermoplastic binder in a liquid state over said fibre wound on said helical track and allowing said thermoplastic binder to set, thereby forming a frusto-conical shell encasing said fibre, said frusto-conical shell having a base;removing said frusto-conical shell from said spindle and placing said frusto-conical shell on a plate so that said base of said frusto-conical shell rests on said plate;locally heating said frusto-conical shell commencing around said base thereof so as to soften said frusto-conical shell; andcausing said frusto-conical shell to collapse progressively onto said plate, thereby converting said frusto-conical shell into said disc on said plate.