Method for manufacturing a composite part and use thereof

Method for manufacturing a composite part (1) having at least an inner hollow moulded body (2) with openings (3), comprising the steps of

• providing a moulding tool (6) which can be closed and opened, with at least a first tool part (7) and a second tool part (8), wherein the moulding tool defines in closed state, with its inner mould walls, the size and the contour of the finished composite part (1);
• applying at least a shell layer (11) made of plastic onto the inner mould walls (9) of both tool parts (7, 8);
• positioning the moulded body (2) in the moulding tool (6) in such a way that the moulded body comes to lie inside the moulding tool when the moulding tool is closed and that the openings of the moulded body are closed;
• surrounding the moulded body inside the closed moulding tool with a thermally insulating plastic foam (12), which is introduced into the moulding body in one component or multiple components and expands therein and bonds with the shell layer and the moulded body;
• and
• opening the moulding tool and removing the composite part formed by the moulded body (2), a thermally insulating plastic foam (12) and the shell layer (11).