Mold element for forming a container, provided with pressure-release air vents in the form of slots

One-piece mold element (3, 7) designed for a mold (1) for the manufacturing of containers by blow molding or stretch blow molding from parisons made of plastic material, with this mold element (3, 7) comprising a one-piece molding wall (4, 8) that has a raised molding surface (5, 9) bearing the imprint of at least a portion of a container, with the molding wall (4, 8) being penetrated by at least one pressure-release air vent (20) that empties, via an inner opening (21), onto the molding surface (9), wherein the opening (21) comes in the form of a slot, and further comprising a secondary wall (16) that defines, with the molding wall (8), a cavity (15) that conforms to the raised pattern of the molding surface (9) for the circulation of a coolant, and wherein the at least one air vent (20) extends through the cavity (15) by being separated from the latter by a wall (24) with a closed contour connecting the molding wall (8) to the secondary wall (16).