Patent ID: 9403309
Filing Date: 2016-08-02
CPC Classification: B29C,B29D,B29K

Claim Text:
1. A method for controlling the heating of an extrusion device of a semi-finished product made of elastomeric material, the extrusion device comprising a plurality of structural units, each structural unit having a working temperature different from the working temperature of at least one other structural unit and a thermal inertia different from the thermal inertia of at least one other structural unit, comprising: a) setting, for each structural unit, a heating temperature to a value equal or close to the working temperature of the structural unit which has a lowest working temperature; b) simultaneously heating all structural units of said extrusion device; c) when the structural unit having the lowest working temperature is approaching or has reached said heating temperature, setting, for other structural units, a subsequent heating temperature to a value equal or close to the working temperature of the structural unit, among said other structural units, closest to the heating temperature previously set; d) simultaneously heating said other structural units of said extrusion device; and e) iteratively repeating the operations recited in c) and d), for only structural units having a working temperature greater than the heating temperature last set, until all of the structural units of the extrusion device have reached a respective working temperature.