Template changer for changing templates of sand molding machine

The pattern plate changer (1) includes a movable pattern plate carrier (9). When a changer track of the movable pattern plate carrier is aligned with a pressing plate track (8) of a pressing plate (5), a pattern plate (2) may be transferred between a sand moulding machine (3) and the pattern plate changer by displacement of the pattern plate. The movable pattern plate carrier has a first pattern plate locking element adapted to lock the pattern plate and a first carrier locking element adapted to interlock the movable pattern plate carrier and the sand moulding machine. The first carrier locking element is adapted to interact with the first pattern plate locking element in such a way that, when the first carrier locking element is in its unlocked position, the first pattern plate locking element is prevented from moving from its locked position to its unlocked position.