Device and method for extrusion of a solid body

An extrusion device of a solid film comprising:

• a cell provided with an input opening to the cell for input of a material designed to form the solid film, and an output opening of the solid film from the cell;
• a first heat exchanger configured to apply a first temperature to the output opening of the cell;
• a second heat exchanger configured to apply a second temperature in a first zone of the cell distinct from the output opening;
• a control circuit configured for controlling the first and second heat exchangers so as to impose:
• a first set of first and second temperatures to form a volume of the material in a solid phase inside the cell, said volume sealing off the output opening;
• a second set of first and second temperatures to generate a temperature gradient between the output opening and the first zone so as to generate a pressure in the cell forcing extrusion of the solid film via the output opening, in which the input opening is closed prior to the second set of first and second temperatures being imposed,
• wherein the input opening comprises a cooler configured to solidify the material in the input opening to close the input opening.