Method for forming seams of inner tube components for exhaust gas installation

摘要

The inner tube components (1,2) are centred in relation to one another by means of an inflatable bellows (3). The bellows is inserted in the second inner tube component so that it extends out of the end of the second inner tube component facing the first inner tube component by a length (L). The bellows is then inflated and then the second inner tube component is fitted on the first inner tube component. Finally, the air is expelled from the bellows and the bellows is removed. The length (L) is preferably 4 to 6 cm. The end of the inflated bellows extending out of the second inner tube component forms a conical or dome-shaped formation. The seam between the inner tube components is formed by means of an outer tube muff (4). The bellows is made of plastic material. For inflation of the bellows, a mechanical pump or a compressor is used.