DEVICE AND METHOD FOR DEPOSITING PARTICLES ON THE TREAD OF A TYRE

摘要

A device (1) for depositing powder particles (2) on a tread (3) before vulcanisation comprising: - means for mounting on a support (9) capable of receiving a tread (3), - means (5) for storing the particles capable of supplying by gravity - dosing means (6) capable of controlling the quantity of particles coming from the storage means (5) and cooperating with - means (7) for transferring the particles to the tread during a relative movement between the transfer means and the support, According to the invention, - the dosing means comprise a rotary dosing cylinder (60) of which the generator comprises at least one cavity in communication with the storage means (5) intended to collect the powder and move it out of the storage means when the cylinder is moved in rotation.