Provided is a pneumatic tire including: a sealant layer located radially inside an innerliner; and a sound-absorbing layer located radially inside the sealant layer, the sealant layer being formed of a generally string-shaped sealant provided continuously and spirally along the inner periphery of the tire, the sound-absorbing layer being attached with the sealant.

Provided is a stable and highly productive method for producing a pneumatic tire. The present invention relates to a method for producing a pneumatic tire, the method including: sequentially preparing a sealant by mixing raw materials including an organic peroxide using a twin screw kneading extruder; and sequentially applying the sealant to the inner periphery of a tire.

A dispense robot for applying a sealant layer on an inner surface of a tire as the tire rotates about a horizontal axis of rotation includes an articulating arm assembly including a distal arm member. A sealant nozzle may be carried by the distal arm member and configured to dispense a bead of sealant material from a nozzle tip of the sealant nozzle as the sealant nozzle moves in a traversing direction across a width of the inner surface of the rotating tire. First and second distance sensors may be located on opposite sides of the sealant nozzle and configured to view along a length of the sealant nozzle such that a distance of the nozzle tip from the inner surface of the tire is detected by the distance sensors.

Methods are provided for applying a sealant layer to an inner surface of a tire. A first tire may be picked up with a tire handling robot and placed on a first sealant application stand. A sealant bead may be applied to the inner surface of the first tire by a dispense robot. A second tire may be picked up by the tire handling robot and placed on a second sealant application stand. A sealant bead may be applied to the inner surface of the second tire by the dispense robot. The first and second sealant application stands may be arranged adjacent to each other. The tire handling robot and the dispense robot may be located on opposite sides of the sealant application stands.

A method and a system for applying a highly viscous fluid to an inner surface of a cavity of a tire, comprising an applicator device for the highly viscous fluid and a delivery circuit for the highly viscous fluid connected to the applicator device and having a highly viscous fluid collection device comprising a tank that internally defines a collection chamber; a delivery device for the highly viscous fluid implemented by means of a pumping device that delivers the highly viscous fluid to the applicator device; a movable piston that delimits the collection chamber at the perimeter; an extractor element intended to move with an alternating movement so as to draw the first highly viscous fluid inside the collection chamber and deliver it to the pumping device; and a position sensor, in particular a linear position transducer, suitable for detecting the position of the piston.

Provided is a pneumatic tire with excellent tire noise-reducing properties. The pneumatic tire includes a resonator attached to the inner periphery of the tire, the resonator including a tube with an opening, and a cavity connected to the tube.

The process includes a non-crosslinked self-sealing composition which is introduced into an extrusion means, the geometric and thermodynamic characteristics of which have been specially adapted. The speed and temperature conditions of the extrusion means are adjusted so that, at an application nozzle forming the outlet die of the extrusion means, the self-sealing composition is crosslinked. The application nozzle is brought close to the internal surface of the casing previously set in relative motion with respect to the application nozzle, and an extruded and crosslinked bead that has a given width and profile is deposited directly on the internal surface of the casing.

Methods are provided for applying a sealant layer to an inner surface of a tire. A first tire may be picked up with a tire handling robot and placed on a first sealant application stand. A sealant bead may be applied to the inner surface of the first tire by a dispense robot. A second tire may be picked up by the tire handling robot and placed on a second sealant application stand. A sealant bead may be applied to the inner surface of the second tire by the dispense robot. The first and second sealant application stands may be arranged adjacent to each other. The tire handling robot and the dispense robot may be located on opposite sides of the sealant application stands.

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.

The present disclosure relates to a process and a system for manufacturing an HSST tyre, as well as the HSST tyre manufactured by the same. The process for manufacturing an HSST tyre includes a cleaning step, a spraying step, and a forced-cooling step. The cleaning step includes an air-drying procedure for evaporating the isopropanol solution on the tyre to be treated with air-drying gases. The forced-cooling step is configured to forcibly cool the tyre to be treated that has been sprayed with the high molecular organic material. By means of accurate design for each step and procedure, the relying on operator's experience is eliminated and thus the performance stability of the HSST tyre is guaranteed. By means of the air-cooling procedure and the forced-cooling step, the time taken to manufacture an HSST tyre is substantially shortened, making it possible to produce the HSST tyre in a large scale.