Patent ID: 8241453
Filing Date: 2012-08-14
Classification: B21F,B29C,B29L

Abstract:
1. A method for building hoses reinforced with spirally laid twisted fibre strands, where the hose under construction undergoes both rotation and advancing motion relative to the laying head, and where the reinforcing twisted fibre strands are unwound from drums, and the drums are rotated about two axes, the first axis being the principal axis of the drums and the second axis being nearly parallel with the direction in which the twisted fibre strands are unwound, wherein the rotational speed n of the drums about the second axis nearly parallel with the direction in which the twisted fibre strand is unwound is approximately the product of the rotational speed N of the hose under construction and the sine of the angle of lay α, where the rotational speed of the drums n is taken relative to the laying head, and the direction of rotation of the drums about the second axis is the same as the direction in which the hose under construction is rotated.