This machine is one of the main processing equipment indispensable to silencer industry. It constitutes main automatic production line of silencer  with longitudinal seam nip machine, automatic core loading machine, double-end sealing machine and automatic welding machine as a mid-end equipment for silencer processing. Absorbing the advantages of machine tools at home and abroad, this machine tool is capable of simultaneous flanging at both ends, and automatically unloads materials after manual feeding.