INSERT FOR A MOULD FOR VULCANISING TYRES FOR VEHICLE WHEELS, PROCESS FOR PRODUCING SAID INSERT AND PROCESS FOR VULCANISING TYRES

The present invention relates to an insert () for a mould () for vulcanising tyres for vehicle wheels, the insert being arranged to be received in a seat () formed on a moulding surface () of the mould () and comprising a base surface () from which a plurality of projections () extends. Each projection comprises a lateral surface () extending away from said base surface (), which lateral surface defines a tapered profile of said projection () away from said base surface (), is inclined at an angle of between 10° and 25° with respect to a direction (X) perpendicular to said base surface (), and has a roughness of between 4 and 11 μm. The invention is also related to a process for producing said insert and to a process for producing a tyre for vehicle wheels.