Abstract: The invention relates to a closable packaging container (1), comprising several container parts (10, 20) and a closing mechanism (3) having at least two stable positions, wherein the closing mechanism (3) comprises an unlocking part (30) designed as a multiple joint and a locking part (31), wherein the locking part (310) acts correspondingly on the unlocking part (30) in a locking position, wherein the unlocking part (30) can be moved in a pivoting motion at least in some positions in order to unlock the closing mechanism (3), and such that the unlocking part (30) remains persistently in an unlocking position after being actuated and releases the locking part (31).

Abstract: In a method for the internal cooling of a rotating object (4), liquid gas from at least one inlet channel (61) in a fixed object (5) is pressed into a ring-shaped groove (62) located between the fixed object (5) and the rotating object (4). From the ring-shaped groove (62) the liquid gas is pressed into at least one channel (63, 64.1, 64.2) in the rotating object (4) and brought to a part to be cooled (15). The liquid gas, upon contact with the part, evaporates and expands while absorbing heat, thereby cooling the part. The area surrounding the part to be cooled (15) may be designed as an expansion chamber (65). The method can be used to cool molded parts in injection molding machines with rotating molds (1), thereby achieving shorter cycle times.