Locking device for a mold group including a safety group

A closing device for a mold group of a molding system, wherein the mold group comprises two half molds, and wherein the closing device extends along a main axis and comprises:

• a device body mountable to one of the two half-molds;
• a closing group, positioned at one end of the device body, comprising at least one closing element rotatable about a rotation axis between a closing position, in which the at least one closing element is arranged substantially orthogonal to the main axis and the two half-molds are mutually lockable, and an opening position, in which the at least one closing element is arranged substantially parallel to the main axis and the two half-molds are mutually releasable;
• a movement group housed in the device body and engaged with the closing group to rotationally move the at least one closing element, wherein the movement group comprises a stem movable along the main axis and transmission members engaged with the stem and with the closing group, suitable for transforming a linear motion into a rotatory motion;
• a command group suitable for commanding an axial movement of the stem;
• and
• a safety group, extending along a safety axis substantially orthogonal to the main axis, the safety group being controllable by air supplying means and comprising a safety element positionable in a safety position, in which the safety element engages the stem and keeps the stem in an axial position, and a release position, in which the safety element is disengaged from the stem, which is free to move axially.