Bridgestone Europe Nv/sa

Bridgestone Corporation

Roberto Pontone

Alfonso Di Egidio

Paolo Straffi

Gaetano Fortunato

Arnaldo Gentili

Cristian Capaldi

A method and a system for applying a layer of sound-absorbing material to the inner surface of a cavity of a pneumatic tire comprising an applicator device having an applicator roller for implementing the application of the layer of sound-absorbing material to the inner surface after the removal of a lining and arranged, in use, at a position directly facing and in proximity to the inner surface and at a distance from the inner surface that substantially approximates the thickness of the layer of sound-absorbing material; a roller for winding the lining after the separation from the layer of sound-absorbing material; and further configured to make it possible to maintain substantially uniform the speed of the applicator roller and the winding roller.

Method and system for applying a layer of soundabsorbing material to the surface of an inner cavity of a pneumati tire

A method for applying a sealing agent to a surface of an internal cavity of a pneumatic tire includes inserting an optoelectronic device into the internal cavity and rotating the tire at least 360 degrees about a first axis to acquire captured images and perform a three-dimensional surface scan of various portions of the surface that are uniformly distributed 360 degrees about the first axis, and thereby identify x, y, and z reference coordinates of various points into which each portion is divided as a function of the respective images. An interior surface profile is determined from the images and the identified reference coordinates, an applicator device including a nozzle is inserted into the internal cavity, and the applicator device is driven as a function of the identified three-dimensional reference coordinates of the entire internal cavity to maintain a constant distance between the applicator device and the surface.

Method and system for applying a sealing agent to the surface of an internal cavity of a pneumatic tire

A system is provided for applying a sealing agent to an surface of an internal cavity of a pneumatic tire. The system provides for detecting the weight of the pneumatic tire before and after the application of the sealing agent to the surface, calculating the difference between the quantity of sealing agent applied to the surface and a reference quantity of sealing agent; storing the difference within a short-term memory buffer and a long-term memory buffer; determining a short-term compensation factor and a long-term compensation factor and calculating a correction factor using alternatively the short-term compensation factor or else the long-term compensation factor; and using the correction factor to actuate an applicator device during the subsequent step of applying the strip of sealing agent to the surface.

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 indicative of the 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.

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

A method and a system for applying a sealing agent to the surface of an internal cavity of a pneumatic tyre provided with an optoelectronic device provided with at least one sensor element able to acquire images of the entire surface and to provide signals indicative of the plurality of captured images; an electronic processing system connected to the optoelectronic device 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 as a function of the respective images; and an applicator device to apply a strip of sealing agent to the surface; wherein the applicator device is connected to the electronic processing system, which is configured to drive the applicator device as a function of the surface profile of the entire internal cavity.

Method and system for applying a sealing agent to the surface of an internal cavity of a pneumatic tyre

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.

Application system and method for applying a sealing agent to the inner surface of a pneumatic tire

A system () for applying a sealing agent to the surface () of an internal cavity () of a pneumatic tyre () 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 a plurality of images of the surface () and to 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 ().

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.

Growing community of inventors

Rome, Italy

Roberto Pontone