Method and device for blow-molding containers

A method of blow molding containers, comprising the steps of:

• deforming a preform of a thermoplastic material, after thermal conditioning, into a container along a transport path in an area of a heating section within a blow mold by influence of blowing pressure;
• providing the preform, at least along a portion of its transport path in the area of the heating section, which has at least one tube-like heating radiator, with a temperature profile that extends in a longitudinal direction of the preform;
• and positioning the heating radiator with a heating device so that radiation emission of the heating radiator in different spatial directions with different intensities.

A device for blow molding containers of a thermoplastic material, comprising:

• at least one heating section arranged at least along a portion of a transport path of a preform;
• a blow molding station provided with a blow mold;
• a device for producing a temperature profile is arranged in an area of the preform along at least a portion of the transport path of the preform, wherein the temperature profile extends in a longitudinal direction of the preform, and wherein at least one tube-like heating radiator is provided in the area of a heating device for generating a heating radiation, the heating device positioning the heating radiator so that radiation emission of the heating radiator is radiated with different intensities in different spatial directions.