Mould and process for vulcanising tyres for vehicles wheels

A mould for vulcanising tyres for vehicle wheels, comprising:

• at least one sidewall plate on which a moulding surface is defined and contacts an axially external surface of a sidewall of a green tyre,
• a removable insert arranged to be received in a seat which is made in the sidewall plate and open on the moulding surface, wherein the removable insert comprises a main body on which a base surface is defined and contacts a portion of the external surface of the sidewall of the green tyre, and
• a retaining member for retaining the removable insert inside the seat,
• wherein the retaining member comprises at least one locking element which is mounted on one out of the removable insert and the sidewall plate and comprises a first contact surface for contacting the other out of the removable insert and the sidewall plate, and wherein the at least one locking element can be moved in an operating direction which is incident with respect to an insertion direction of the removable insert into the seat, between a locking position, in which the removable insert is retained inside the seat, and a release position, in which the removable insert is free to leave the seat;
• and
• wherein the locking element is fixed to the sidewall plate and the first contact surface contacts the removable insert and moves the removable insert in the insertion direction inside the seat further to the movement of the locking element in the operating direction.