Device and method for heating a preform in plastic material

摘要

A device for heating a preform in plastic material intended to become a container such as a bottle, comprising:
- means (2) for generating microwaves;
- an applicator (6) of microwaves comprising a shell (44) which identifies a chamber (3) housing at least one part of the preform, said applicator (6) also comprising an emitter (4) of microwaves intended to emit microwaves into said chamber (3) for heating the preform;
- means (8) for the transmission of microwaves from the generation means (2) to the emitter (4). The means (2) for the generation of microwaves are means for the generation of microwaves at variable and adjustable frequency in order to optimise the absorption of microwaves by the preform.