Patent ID: 8419418

Claim:
An injection mould for injection moulding an article having a base and a sidewall, the injection mould comprising: first and second mould parts which are adapted to be connected together in a fully closed configuration so as to define a mould cavity therebetween, in the fully closed configuration the first and second mould parts defining a cavity outer surface which defines the outer shape of the article to be moulded in the mould cavity, the mould cavity having a base-forming portion and a sidewall-forming portion for respectively forming a base and a sidewall of an article to be moulded, an injector for injecting into the mould cavity molten material to be moulded into the article, at least one portion of one of the first and second mould parts being movable when the first and second mould parts are in the fully closed configuration so as to vary the volume of the mould cavity in the fully closed configuration, an actuator for selectively moving the at least one portion of one of the first and second mould parts in first and second directions so as to increase and reduce, respectively, the volume of the mould cavity in the fully closed configuration, and a control mechanism for controlling the direction of movement of the actuator, the control mechanism comprising a detector for detecting a pressure associated with the actuator.