Sheet blank of multilayer structure, with improved deep-drawability and weldability, and device for manufacturing this type of sheet blank

摘要

The subject of the invention is a sheet blank (1) of multilayer structure, a so-called sandwich sheet, of the type comprising two outer metal sheets (2, 3) and a polymer layer (4) sandwiched between the said metal sheets (2, 3). The edges (2a, 3a) of the outer metal sheets (2, 3) are welded together over all or part of the perimeter of the sheet blank (1). The subject of the invention is also a process and a device for manufacturing this type of multilayer-structure sheet blanks. IMAGE