Torsional Vibration Damper

A method for manufacturing a torsional vibration damper having a hub part which is fastenable on a drive shaft of an engine;

• a flywheel ring which surrounds the hub part in a radially outer region, wherein a gap provided between the hub part and the flywheel ring is filled with a fluid;
• and one or more sealing devices configured to prevent the fluid from escaping, wherein each sealing device comprises:
• a first ring,
• a second ring, and
• a sealing element made of a plastic material, which is sealingly connected to the first ring on the one hand and to the second ring on the other hand, wherein the sealing element has at least one elastically deformable axial projection in a region of each fastening section of the hub part and the flywheel ring,
• wherein the method comprises:
• connecting the sealing device to the hub part and the flywheel ring in a material- locking manner by the steps of:
• a) pressing a metal surface of the first and/or second ring of the sealing device against the hub part and the flywheel ring by way of a pressing device;
• and
• b) forming a material-locking connection between the sealing device and the hub part and the flywheel ring by welding.