MAKING AN ELONGATED PRODUCT

摘要

An elongated product is formed such that first a core (2) is formed, the outer surface of the core (2) being made of plastic. Thereafter, a tubular metal layer (4) is extruded such that the layer (4) is seamless. When the metal layer (4) is extruded, a clearance (16) is allowed between the metal layer (4) and the core (2). After the metal layer (4) has cooled, the outer surface of the core (2) is arranged against the inner surface of the metal layer (4). An adhesive action is arranged between the core (2) and the metal layer (4) and a permanent compressive force is arranged, which compressive force compresses the core (2) and the metal layer (4) together.