Male mould element

A male mould element comprising a cooling circuit having first passage elements obtained in a first component of the male mould element and second passage elements obtained in a second component of the male mould element, the first passage elements and the second passage elements being distributed around a longitudinal axis of the male mould element so that there exists a plurality of angular positions of the first component relative to the second component in which the first passage elements are in fluid communication with the second passage elements, wherein the second component is removably fixed to the first component by means of a non-permanent connection so that the first and second components are configured to be repeatedly disassembled from each other for cleaning or maintenance operations and then reassembled, and so that the second component is mounted so as to be non-rotatable relative to the first component during operation of the male mould element, wherein the first passage elements comprise at least one first longitudinal passage and the second passage elements comprise at least one second longitudinal passage, the at least one first longitudinal passage having an angular dimension around the longitudinal axis that is greater than an angular dimension of the at least one second longitudinal passage around the longitudinal axis, so that said at least one second longitudinal passage faces said at least one first longitudinal passage for the whole angular dimension of the at least one second longitudinal passage around the longitudinal axis in said plurality of angular positions.