Accumulating Conveyor Chains

A free flow conveyor system allows you to stop conveyed objects with a stopper while the chain runs continuously. ANSI/BS Standard RS roller chains can be used by placing conveyed objects directly on the chain. However, the chain will slide underneath the conveyed object during accumulation and this may leave marks on the bottom of conveyed objects, and may eventually lead to excessive chain wear.

Free flow chains were developed to eliminate possibility of damaging conveyed objects during accumulating mode. These chains are equipped with rollers that support conveyed objects. When accumulating, freely rotating rollers are in contact with the bottom side of goods conveyed, which ensures smooth and damage-free operation.

Types of Free Flow Chains / Accumulating Conveyor Chains:

  • Top Roller Chain
    • 3 types of base chain: Double Pitch roller chain with standard rollers, Double Pitch roller chain with oversize rollers, and RS-type.
    • Two other types of Top Roller Chains: Double Strand (RS or Double Pitch), and TG-form with SK attachments that point downward.
    • Features: high maximum allowable cost and economical cost.
  • Center Roller Chain
    • Suitable for high accumulation storage and stock conveyors.
    • The speed of the conveyed material and the chain are identical.
    • Center of gravity is lower. The materials are placed on the rollers on each side which allows for stable conveying.
  • Double Plus Free Flow Chain
    • It conveys object 2.3 times to 2.5 times faster than the actual chain speed.
    • Motor speeds up to 60% slower can be used, leading to improved reliability and substantial reductions in energy cost and chain noise (by up to 15dB).

Key Terms

  • Free Flow Chains
  • Top Roller Chain
  • Center Roller Chain
  • Single Plus Chain
  • Double Plus Chain