Patent ID: 8657977
Filing Date: 2014-02-25
Classification: B29D

Abstract:
1. A method for making an uncured rubber tire component, the uncured rubber tire component being an annular body having a circumferentially extending indentation on the outer surface thereof defining a steep slope, whereby the uncured rubber tire component has a thin portion and a thick portion each, having a width smaller than the width of the uncured rubber tire component, the method comprising: winding each of a plurality of tapes continuously, a plurality of times around an axis to form a plurality of continuous, axially adjacent, circumferential windings, while traversing each of the tapes along the axis at a controlled traversing speed so that the uncured rubber tire component is collectively formed by the continuous, circumferential windings of each of the tapes, wherein said tapes, each have a constant width smaller than the width of the uncured rubber tire component and are made of an uncured rubber compound, the number of strokes of the traversing of said plurality of tapes is increased in the thick portion over that of the thin portion of the tire component, wherein the winding operation of at least one of the tapes is made while traversing the thin portion at least once, wherein the winding of said plurality of tapes includes winding at least one of the tapes so as to heap up the windings of the or each tape to form said steep slope, the method further comprising controlling the traversing speeds of the respective tapes so that said steep slope is formed as an upslope in a traversing direction of the or each tape being wound to form said steep slope, and a steep down slope of more than 45 degrees is not formed in said traversing directions.