Process for manufacturing elastomeric tire components

摘要

A process for manufacturing an elastomeric tire component includes the steps of a) preparing an elongated element including a cross-linkable elastomeric material by feeding it to an extruding device having a plurality of units, each having a respective thermal inertia, and b) delivering the elongated element onto a building support, and further includes at least one non-productive step of c) submitting at least one of the units of the extruding device to a thermal transition selected from heating or cooling, substantially reducing the risk of scorching during the thermal transition from and to the non-productive step ranking the units according to their thermal inertia and heating the units starting with the top-ranked unit sequentially to the bottom-ranked unit to reach the respective working temperature or cooling the units starting from the maximum working temperature unit sequentially to the minimum working temperature unit to reach the respective non-working temperature.

主权项

1. A process for manufacturing an elastomeric tire component comprising the steps of:
a) preparing an elongated element comprising a cross-linkable elastomeric material, by the steps comprising:
a1) feeding the cross-linkable elastomeric material to an extruding device comprising a plurality of units; anda2) extruding the cross-linkable elastomeric material by means of said extruding device so as to form said elongated element,
each of said units having a respective working temperature,each of said units having a respective non-working temperature lower than said working temperature, andeach of said units having a respective value of thermal inertia; b) delivering said elongated element onto a building support rotatably moving about a geometrical rotation axis thereof, so that the elongated element is circumferentially applied on the support; c) before extruding said cross-linkable elastomeric material, selecting at least two of the plurality of units and submitting the selected units to a thermal transition carried out by heating said selected units starting from the selected unit having the highest value of thermal inertia sequentially to the selected unit having the lowest value of thermal inertia to reach the respective working temperature of each selected unit, wherein the heating of each sequential unit starts after the heating of the previous unit and d) after extruding said cross-linkable elastomeric material, submitting the selected units to a thermal transition carried out by cooling said selected units starting from the selected unit having the maximum working temperature sequentially to the selected unit having the minimum working temperature to reach the respective non-working temperature of each selected unit, wherein the cooling of each sequential unit starts after the cooling of the previous unit.