Abstract: A system for applying a sealing agent to the surface of an internal cavity of a pneumatic tire provided with an applicator device for supplying a strip of sealing agent that is applied to the surface and an opto-electronic device that is integral to the nozzle of the applicator device and that is provided with at least one sensor element that is able to acquire images of the surface and provide a plurality of signals that are indicative of said plurality of acquired images; and an electronic processing system connected to the opto-electronic device, and to the applicator device and configured so as to acquire the signals that are indicative of the plurality of images acquired by the opto-electronic device; and to control the application of the sealing agent as a function of the plurality of signals that are indicative of the plurality of images acquired by the opto-electronic device.

Abstract: A system (1) for applying a sealing agent to the surface (5) of an internal cavity (2) of a pneumatic tyre (3) provided with an applicator device (12) for supplying a strip of sealing agent that is applied to the surface (5) and an opto-electronic device (4*; 20) that is integral to the nozzle (18) of the applicator device (12) and that is provided with at least one sensor element (9*; 20) that is able to acquire a plurality of images of the surface (5) and to provide a plurality of signals that are indicative of said plurality of acquired images; and an electronic processing system (11) connected to the opto-electronic device (4*; 20), and to the applicator device (12) and configured so as to acquire the signals that are indicative of the plurality of images acquired by the opto-electronic device (4*; 20); and to control the application of the sealing agent as a function of the plurality of signals that are indicative of the plurality of images acquired by the opto-electronic device (4*; 20).

Abstract: An application system and method for applying a sealing agent to the inner surface of a pneumatic tire includes: rotating, by means of a support device, the pneumatic tire about an axis of rotation; applying a layer of sealing agent to the inner surface of the pneumatic tire by means of a dispensing head arranged within the pneumatic tire itself; pressing, by means of a pressure roller, the just applied layer of sealing agent against the inner surface of the pneumatic tire; pushing the pressure roller against the just applied layer of sealing agent by means of an actuator which generates a force having a desired value; determining, by means of a force sensor, a measured value of the force generated by the actuator; and cyclically varying the force generated by the actuator as a function of the measured value of the force.

Abstract: A method and system for applying a sealing agent to a surface (2) of an inner cavity (3) of a pneumatic tyre; the method provides for detecting the weight of the pneumatic tyre (4) before and after the application of the sealing agent to the surface (2); calculating the difference between the quantity of sealing agent applied to the surface (2) and a reference quantity of sealing agent, storing said difference within a short-term memory buffer (24) and a long-term memory buffer (26); determining a short-term compensation factor (KST) and a long-term compensation factor (KLT) and calculating a correction factor (KEA) using alternately the short-term compensation factor (KST) or else the long-term compensation factor (KLT); and using said correction factor (KEA) to actuate an applicator device (7) during the subsequent step of applying the strip of sealing agent to the surface (2).

Abstract: A method and a system for applying a sealing agent to the inner surface (2) of a pneumatic tire (4) comprising a supply circuit (10) having a sealing agent collection device (11) comprising a tank (14); a sealing agent heating device (12); and a sealing agent supply device (13) implemented by means of a pumping device (17) that supplies the sealing agent to an applicator device (7), a piston (26), an extractor element (28) intended to withdraw the sealing agent and to supply it to the pumping device (17); a piston (26) position control device (30); and a level sensor (29) for detecting the quantity of sealing agent within the tank (14); wherein the passage of the control device (30) at the position of the level sensor (29) determines the beginning of depletion position of the tank (14) and a completely empty position of the tank (14) as a function whereof the extractor element (28) and heating element (12) are actuated.

Abstract: A method and a system (1) for applying a layer (2) of sound-absorbing material to the inner surface (3) of a cavity (4) of a pneumatic tyre (5) comprising an applicator device (9) having an applicator roller (10) for implementing the 5 application of the layer (2) of sound-absorbing material to the inner surface (3) after the removal of a lining (8) and arranged, in use, at a position directly facing and in proximity to said inner surface (3) and at a distance from the inner surface (3) that substantially approximates the thickness of the layer (2) of sound-absorbing material; a roller (11) for winding the lining (8) after the 10 separation from the layer (2) of sound-absorbing material; and synchronization means (13) implemented by means of a transmission member (14) in order to make it possible to maintain substantially uniform the speed of the applicator roller (10) and the winding roller (11).

Abstract: The invention relates to a method and a system for the processing of an end-of-use pneumatic tyre that is provided with an inner lining (SAL) layer manufactured with a sealing agent intended to seal any punctures and at least partially applied to the surface of an inner cavity (2) of the end-of-use pneumatic tyre; the system (1) comprises an applicator device (6), which is provided with at least one nozzle (13) which dispenses a cryogenic fluid, preferably liquid nitrogen, upon the (SAL) layer of sealing agent in such a way that the (SAL) layer of sealing agent reaches the solid state; a device (14) for the removal of the (SAL) layer of solid sealing agent that is provided with a tool (16) for removing the (SAL) layer of solid sealing agent by means of mechanical abrasion; and a circuit (17) for suctioning the solid sealing agent removed by the tool (16).

Abstract: An application system and method for applying a sealing agent to the inner surface of a pneumatic tire comprises: a support device operable for rotating the pneumatic tire around an axis of rotation; a dispensing head operable to be arranged inside the pneumatic tire in order to apply a layer of sealing agent to the inner surface of the pneumatic tire itself; a main extrusion device which is connected to the dispensing head and that is operable for supplying the dispensing head with a first throughput of sealing agent; and an additional extrusion device which is connected to the dispensing head, and which is separate and independent from the main extrusion device, and is operable for supplying the dispensing head itself with a second throughput of sealing agent that merges with the first throughput of sealing agent.

Abstract: An application system and method for applying a sealing agent to the inner surface of a pneumatic tire includes: rotating, by means of a support device, the pneumatic tire about an axis of rotation; applying a layer of sealing agent to the inner surface of the pneumatic tire by means of a dispensing head arranged within the pneumatic tire itself; pressing, by means of a pressure roller, the just applied layer of sealing agent against the inner surface of the pneumatic tire; pushing the pressure roller against the just applied layer of sealing agent by means of an actuator which generates a force having a desired value; determining, by means of a force sensor, a measured value of the force generated by the actuator; and cyclically varying the force generated by the actuator as a function of the measured value of the force.

Abstract: A system (1) for applying a sealing agent to the surface (5) of an internal cavity (2) of a pneumatic tyre (3) provided with an applicator device (12) for supplying a strip of sealing agent that is applied to the surface (5) and an opto-electronic device (4*; 20) that is integral to the nozzle (18) of the applicator device (12) and that is provided with at least one sensor element (9*; 20) that is able to acquire a plurality of images of the surface (5) and to provide a plurality of signals that are indicative of said plurality of acquired images; and an electronic processing system (11) connected to the opto-electronic device (4*; 20), and to the applicator device (12) and configured so as to acquire the signals that are indicative of the plurality of images acquired by the opto-electronic device (4*; 20); and to control the application of the sealing agent as a function of the plurality of signals that are indicative of the plurality of images acquired by the opto-electronic device (4*; 20).

Abstract: A method and a system (1) for applying a sealing agent to the surface (5) of an internal cavity (2) of a pneumatic tyre (3) provided with an optoelectronic device (4) provided with at least one sensor element (9) that is able to acquire a plurality of images of the entire surface (5) and to provide a plurality of signals that are indicative of the plurality of captured images; an electronic processing system (11) connected to the optoelectronic device (4) and configured in such a way as to acquire the signals that are indicative of the plurality of captured images and to process them in order to determine the surface profile of the entire internal cavity (2) as a function of the respective images; and an applicator device (12) intended to apply a strip of sealing agent to the surface (5); wherein the applicator device (12) is connected to the electronic processing system (11), which is configured in such a way as to drive the applicator device (12) as a function of the surface profile of the entire internal c

Abstract: A machine and method for applying a tread to a carcass of a tire; the machine has a rotary drum supporting the carcass, a feed conveyor for feeding the tread to the rotary drum, a pressure roller contacting the tread, an actuating device for pushing the pressure roller against the tread with a force of adjustable intensity, and a control unit for regulating the intensity of the force as a function of an error variable calculated as the difference between the length of the remaining portion of the circumference of the carcass, and the length of the remaining portion of the tread; and the control unit regulates the intensity of the force by means of a proportional control block having a gain varying as a function of the value of the error variable and as a function of the rate of change of the error variable.

Abstract: A machine (1) and method for applying a tread (2) to a carcass (3) of a tire (4); the machine (1) has a rotary drum (5) supporting the carcass (3), a feed conveyor (6) for feeding the tread (2) to the rotary drum (5), a pressure roller (7) contacting the tread (2), an actuating device (8) for pushing the pressure roller (7) against the tread (2) with a force (F) of adjustable intensity, and a control unit (9) for regulating the intensity of the force (F) as a function of an error variable (E) calculated as the difference between the length (RCC) of the remaining portion of the circumference of the carcass (3), and the length (RTL) of the remaining portion of the tread (2); and the control unit (9) regulates the intensity of the force (F) by means of a proportional control block (12) having a gain (Kp) varying as a function of the value of the error variable (E) and as a function of the rate of change of the error variable (E).