Bellow forming machines can be divided into five types according to different forming methods.
They are hydraulic forming, mechanical expansion forming, edge welding forming, chemical deposition forming and electrodeposition forming, among which hydraulic forming and mechanical expansion forming are the most common.
Edge welding forming is used to manufacture edge welded bellows with limited installation space or large stroke requirements.
Chemical deposition moulding and electrodeposition moulding are used to manufacture micro bellows.
Hydraulic Forming
#1 through hydraulic bellow forming 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 consecutive hydraulic bellow 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 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
Mechanical
Expansion 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
