Composite panel with middle layer comprising knobs, preferentially made from plastics and method for making it

摘要

The middle layer (12) of the preferably plastic composite plate (11), on both sides of the center plane, has positive and negative protuberances whose end surfaces are at least partly parallel with the center plane and which form a contact surface for holding at least one layer (13,14). The middle layer is conveyed to a laminating unit, then to a cooling unit in its production process.