Method and an apparatus for winding up round material on a drum provided with terminal flanges

A method for winding round material on a winding drum between first and second terminal flanges characterized by the following steps:

• (a) supplying the round material to the drum;
• (b) engaging the pressure roller laterally against the round material;
• (c) rotating the winding drum without axial displacement thereof and shifting the pressure roller axially toward one terminal flange by an amount approximately equal to the diameter of the round material per rotation of the winding drum;
• (d) interrupting the axial shifting movement of the pressure roller at a predetermined angle between the supplied round material and the rotational axis of the winding drum and displacing the winding drum axially towards the last produced winding turn by an amount exceeding the diameter of the round material per revolution of the winding drum;
• (e) repeating steps (c) and (d) until the spacing distance of the pressure roller from said one terminal flange of the winding drum is equal to approximately 1.5 times the diameter of the round material;
• (f) axially displacing the winding drum and the pressure roller toward the last produced winding turn by an amount equal to the diameter of the round material;
• (g) increasing the axial displacement of the winding drum and of the pressure roller, after the winding has reached said one flange of the drum, until the supplied round material is at substantially a right angle to the axis of the winding drum;
• (h) interrupting the axial displacement of the winding drum and of the pressure roller during one rotation of the winding drum, during which time the round material is wound between said one flange of the winding drum and the pressure roller thus producing the last turn of the first winding layer;
• (i) winding the round material into the channel between the last and the penultimate turns of the first winding layer;
• and,
• (j) repeating the steps (c) through (i) with an opposite direction of axial displacement of the winding drum and pressure roller for winding the next layer.