公开(公告)号：US20220212430A1

公开(公告)日：2022-07-07

申请号：US17595697

申请日：2020-05-26

Applicant: Pirelli Tyre S.p.A.

Inventor： Cesare Emanuele AMURRI ,  Christian DE COL ,  Marco CANTU' ,  Roger BASILICO

IPC: B29D30/30 ,  B29C48/00 ,  B29C48/92 ,  B29C48/255 ,  B29C48/08 ,  B29C48/21 ,  B29C48/305 ,  B29C48/49 ,  B29D30/60 ,  B29D30/62

Abstract: In a process for building tyres for vehicle wheels, at least one tread band (9) or other elastomeric component of a tyre (2) is made by applying at least one continuous elongated element (14) according to a plurality of turns (C) around a forming drum (15) rotating around a geometric rotation axis (X) thereof. The continuous elongated element (14) is made by the action of extruding a first material through an extrusion nozzle (16), to form an inner core (33) of said continuous elongated element (14) exiting from an outlet opening (18) of the extrusion nozzle (16). During the extrusion, a second material different from the first material is conveyed around the first material, at the extrusion nozzle (16) and upstream of the outlet opening (18), to form a coating layer (32) which entirely surrounds the inner core (33).

公开(公告)号：US20250144902A1

公开(公告)日：2025-05-08

申请号：US19013354

申请日：2025-01-08

Applicant: Pirelli Tyre S.p.A.

Inventor： Cesare Emanuele AMURRI ,  Christian DE COL ,  Marco CANTU' ,  Roger BASILICO

IPC: B29D30/30 ,  B29C48/00 ,  B29C48/08 ,  B29C48/21 ,  B29C48/255 ,  B29C48/305 ,  B29C48/49 ,  B29C48/92 ,  B29D30/60 ,  B29D30/62 ,  B29K105/00 ,  B29L30/00

Abstract: In a process for building tyres for vehicle wheels, at least one tread band (9) or other elastomeric component of a tyre (2) is made by applying at least one continuous elongated element (14) according to a plurality of turns (C) around a forming drum (15) rotating around a geometric rotation axis (X) thereof. The continuous elongated element (14) is made by the action of extruding a first material through an extrusion nozzle (16), to form an inner core (33) of said continuous elongated element (14) exiting from an outlet opening (18) of the extrusion nozzle (16). During the extrusion, a second material different from the first material is conveyed around the first material, at the extrusion nozzle (16) and upstream of the outlet opening (18), to form a coating layer (32) which entirely surrounds the inner core (33).