Patent ID: 7402216
Filing Date: 2008-07-22
Classification: B29C,B29K,B29L

Abstract:
1. A method for making reinforced tube-shaped structures comprising the steps of: a) applying a first rubber layer with a first extrusion unit to a series of sequential rigid cylindrical mandrels which are coupled to each other and which are driven at an advancement speed (v) in the direction of an advancement axis (X); b) applying a first filament layer at defined desired filament angles (α c) applying at least one further rubber layer to the first filament layer utilizing at least one additional extrusion unit; d) continuously measuring the advancement speed (v) of the mandrels; e) controlling the rubber quantity, which is applied via the first extrusion unit, in dependence upon the measured advancement speed (v) in order to obtain a defined desired thickness of the first rubber layer; and, f) controlling the rotational speed of the first bobbin creel unit during the rotation about the mandrels in dependence upon the advancement speed (v) in order to obtain a filament layer having the defined desired filament angles (α applying at least one further filament layer to each of the further rubber layers at defined desired filament anales (α controlling the rotational speed of the additional bobbin creel unit during the rotation about the mandrels in dependence upon the rotational speed of the first bobbin creel unit, the bobbin creel units being coupled to each other via a dead time and coupling factors.