Extrusion of natural raw material together with natural reinforcing fibres to form an annular product

摘要

In a process for manufacturing a reinforced product from natural raw materials a pasteurised heat curing natural raw material(4) is forced through an extrusion die(15) together with continuous twisted natural fibres(3), the latter being held under tension in the curing natural material matrix by the injection force exerted on the cured part of the product and a braking system at the fibre unwinding drum(2).