Additive manufacturing process of a mould using microwave radiation, microwave printing device and additive printing device for 3D printing of a filament comprising a fibre composite material

A system for additive manufacture of a mold, the system comprising:

• a microwave printing device, comprising:
• an inlet for a filament;
• an outlet for the filament;
• and
• a microwave heating device for heating the filament using microwave radiation,
• wherein the microwave heating device comprises at least one coaxial resonator configured to provide resonant microwave radiation for heating the filament, and wherein the coaxial resonator is formed by an outer conductor, which forms a cavity, and a coaxial inner conductor, and comprises a microwave radiation input for coupling in microwave radiation;
• a print platform;
• a moving device for moving the microwave printing device and/or the print platform relative to one another;
• and
• a control and/or regulating device for controlling and/or regulating a printing process.

A method for the additive manufacture of a mold using microwave radiation, the method comprising:

• providing a filament at an inlet of a microwave printing device, the microwave printing device comprising at least one coaxial resonator configured to provide resonant microwave radiation;
• heating the filament in the coaxial resonator using the resonant microwave radiation;
• and
• printing the heated filament to form the mold.