The method involves inserting a porous damping wall segment (3) in a melt of the acoustic channel section during extrusion. A thermal separation is carried out in areas of different temperature between an area (15), in which a porous damping wall segment i...

Gate (1) for throttle valves composed of a central supporting portion (2) constituted by a thermoplastic material and an edge portion (3) constituted by a thermoplastic elastomeric material belonging to the same chemical family as the thermoplastic materia...

Inlet manifold for an IC engine is made from plastic. It has a sealing ring (5) which fits into or is bound to the core material (7, 8) of the manifold. An Independent claim is included for a method for making the manifold by feeding liquid material for ma...