Mfg. supporting structure for a catalytic converter - by winding metal layers into star or cross pattern and compressing to final shape in negative mould

摘要

Corrosion-resistant sheet metal is wound to form a laminated ring before it is compressed in a mould to its final non-circular shape. The novelty is that the supporting structure is produced by winding the metal layers in a star or cross pattern before the structure is then inserted in a negative mould and compressed to its final shape. The change in supporting structure dimension does not deviate more than 20 per cent from the original wound circular shape. A suitable structure (10,13) is made of sheet metal (11,12) wound in a star or cross pattern and is subsequently compressed to its final shape in a mould (22,23). The mould consists of at least two parts. The dimensions of the mould surfaces do not deviate more than 20 per cent from those of the uncompressed structure. ADVANTAGE - Simplified prodn. of non-circular catalytic converter structures.