Method and apparatus for producing a composite material

The invention relates to a method for producing a sandwich composite consisting of at least two outer metal layers and at least one is arranged between the outer layers of plastic film, wherein at least two coated on one side with plastic, metallic semi-finished products are provided to establish a connection between the plastic layers of the semifinished products at least one the plastic-coated sides of the metallic semi-finished products is activated prior to bonding and the semifinished products are connected to each other via their sides coated with plastic to form a sandwich composite material. The object is to provide a method for which an improvement in the process stability is ensured for the production of sandwich composite materials from one side coated with at least one plastic layer semifinished achieved in that the activation of the plastic layer of the semi-finished immediately ago by the plastic-coated side of the semifinished he follows.