A method and an apparatus for manufacturing tyres

• Main Authors: MR CLAUDIO LACAGNINA, POZZATI, GIOVANNI, RUNGO, ROBERTO
• Format: Patent
• Language: English; French; German
• Published: 21.03.2012
• Subjects: ACTUATING-FLOATS; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TAPS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VALVES; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A robotized arm drives in rotation a drum carrying a tire being processed and conveniently moves it in front of a delivery nozzle supplying a continuous elongated element of elastomer material in order to form a tire component. The delivery nozzle is connected through at least one selecting valve with two or more extruders, each designed to supply a respective blend. The selecting valve connects the delivery nozzle with the outlet of one of the extruders, breaking communication between the nozzle and the other extruders. The outlets of the non-active extruders can be connected with at least one outlet duct. It is thus possible to replace the type of blend used for manufacturing the tire component without the article of manufacture having to be moved away from the delivery nozzle.