Device and method for blow molding plastic containers

A method for interchanging blow form pieces of an openable and closable blow mold for the production of tempered plastic preforms by converting tempered plastic performs, the blow mold including at least two blow mold pieces which are arranged interchangeably at a blow mold carrier, each of the at least two blow mold pieces including cooling fluid pipes as conducts for a cooling fluid extending therein to temper the blow mold at least one of during or after blow molding of the plastic containers, the cooling fluid pipes in the blow mold being connected to a central cooling fluid supply of the device for blow molding, the method comprising:

• applying an inner blow pressure to the plastic containers;
• separating the at least two blow mold pieces from the blow mold carrier and exchanging the at least two blow mold pieces with at least two other blow mold pieces;
• and
• at least one of attaching and detaching, using an assigned coupling module, a connection between the central cooling fluid supply and the cooling fluid pipes during the separating and exchanging step, the detaching being accomplished via an operating element of the assigned coupling module that releases a mechanical tension between the coupling module and the cooling fluid pipes when actuated.