5. Free Flow Chains
5.2 TYPES OF FREE FLOW CHAIN
5.2.1DOUBLE PLUS ® Chain Free flow conveyance: Light conveyance. Electric, electronic industries Application Example DOUBLE PLUS Chain is a new type that meets low noise requirements and high safety standards. It was invented in Japan in the 1980s, and it is now being used around the world for electronics assembly lines as well as in the auto parts, beverage, and medical equipment industries. The chain is widely used in electric or electronic industries on the assembly lines, where objects (for example, VCRs) are conveyed on pallets. Usually two chains are used as a set (Figure 5.4). Pallets are usually made of aluminum with steel or plastic (polypropylene) liners at the chain-pallet contact point.
The common pallet type is: Size: 500 mm 3 500 mm. Weight: 20 to 30 kg (including the weight of conveyed objects). Pallet speed: 10 to 15 m/min.
Construction and Features DOUBLE PLUS Chain has large center rollers with small rollers on both sides. During conveyance, large center rollers and small rollers rotate at the same rpm. Chain tension, while conveying objects, is relatively low, as it is affected primarily by rolling friction.
Figure 5.4 DOUBLE PLUS ® Chain
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