this one succeeds in the outer ply 38 at the axial end facing the base plate 6 not bearing on the outer wall of the inner mold part 2 a bleeding through the annular gap 24 may thus be effected as has already been explained by fig1 c subsequently as represented in fig5 c fluid plastic is injected into the injection channel 26 and there flows through the opening 44 in the outer ply 38 into the gap 16 a between the outer ply 38 and the inner mold part 2 the outer ply 38 is extended by this whereby the gap 16 a is increased in size and the gap 16 b disappears i e the outer ply 38 comes to bear directly on the inner wall of the recess 14 in the outer mold part 12 thereby the outer ply 38 is extended in particular in the peripheral direction with respect to the longitudinal axis z the collar 50 of the outer ply 38 lies in the gap 18 between the base plate 6 and the outer mold part 2 the inner mold part 2 is rotated relative to the outer mold part 12 in the direction a about the longitudinal axis z as has been described by fig1 during and or after the injection of the plastic 52 the previously described alignment of the fibers 32 occurs by this said fibers being admixed to the plastic 52 the outer ply 38 thereby is rotationally fixed to the outer mold part 12 inasmuch as this is concerned the inner mold part 2 also rotates relative.