Bellows forming machines use five different forming methods to create their shape.
They are hydroforming, mechanical forming, edge welding, electroforming and rethane bulge forming, among which hydroforming and mechanical forming are the most common.
Edge welding forming is used to manufacture edge welded bellows with limited installation space or large stroke requirements.
Electroforming is used to manufacture micro bellows.
Hydroforming
1. Automatic integral hydroforming machine
DN6-150
Application: suitable for automotive exhaust pipes, metal hoses, valve bellows, expansion joints, etc
Ply: single-ply or multi-ply
Swelling medium: emulsion
Bellows effective length: less than 500mm
Features: high production efficiency, high precision bellows, good surface protection for bellows
2. Individual corrugation continuous forming machine
DN32-600
Swelling medium: emulsion
Application: suitable for automotive exhaust pipes, metal hoses, valve bellows, expansion joints, etc
Ply: single-ply or multi-ply
Bellows effective length: theoretically infinitely long
Features: wide application range, high production efficiency, high precision bellows, good surface protection for bellows
3. manual Integral hydroforming machine
DN100-6000
Swelling medium: emulsion
Application: suitable for expansion joints, compensators, etc
Ply: single-ply or multi-ply
Bellows effective length: less than 500mm
Features: high production cost, low production efficiency, and certain operational risks
Expansion/punch Forming
DN100-6000
Application: suitable for expansion joints, compensators, etc
Ply: single-ply or multi-ply
Swelling medium: high-strength die steel
Bellows effective length: less than 500mm
Features: suitable for large size bellows
