Method and line for manufacturing a panel with multiple acoustic elements for an acoustic attenuation structure

A method for continuously manufacturing a complex acoustic multi-element panel for an acoustic attenuation structure comprising a complex acoustic multi-element panel extending following a horizontal direction and a vertical direction and comprised along the vertical direction between a porous acoustic skin and a reflective acoustic skin, said complex acoustic multi-element panel comprising a plurality of complex acoustic elements each having a shape gradually narrowing between a base and a top and a plurality of partitions surrounding each complex acoustic element so as to form a plurality of acoustic cells, said partitions extending following the vertical direction from the base of the complex acoustic elements,

• wherein the manufacturing method comprises:
• supplying a thermoplastic resin film at the entry of a stamping system comprising at least one pair of complementary cylinders,
• heating said thermoplastic resin film upstream of the entry of the stamping system,
• performing a passage of said thermoplastic resin film between said at least one pair of complementary cylinders, said pair of complementary cylinders comprising a male cylinder with teeth radially protruding from the male cylinder and a female cylinder with cavities on its radial surface, the cavities of the female cylinder being of shapes complementary to the shapes of the teeth of the male cylinder,
• separating the stamped film at the exit of the stamping system using a separator disposed at the exit of the stamping system between the stamped film and the female cylinder, and conditioning the stamped thermoplastic resin film produced at the exit of the stamping system, wherein the conditioning comprises cooling the stamped film using a fresh air intake system located between the stamping system and a conditioning roll, and
• forming the complex acoustic multi-element panel.