Method and device for blow molding containers

Method and device for blow molding containers, wherein a preform made of a thermoplastic material is shaped to give a container using blow molding pressure in a blow mold once the preform has been subjected to a thermal conditioning step in the region of a heating section along a transport path, and wherein at least one parameter characterizing the blow molding process is measured and supplied to a control device which acts upon at least one adjusting element to change at least one parameter influencing the blow molding process. The control device (51) calculates at least one property of the finished blow-molded container (2) based on the measured parameters characterizing the blow molding process and using a simulation model (48) and compares said property with a set value. Based on a possible deviation between the set value and the actual value, the parameter influencing the blow molding process is changed such that a possible remaining deviation is minimized.