MACHINE ELEMENTS The right accumulation chain for your conveying system Throughout all industry sectors, accumulation chains are used for conveying, accumulating and separating a wide range of different goods. They have proven to be exceptionally efficient and durable, and consequently cost effective. As a rule, these chains run continually, driven by outboard rollers via sprockets. The conveyed goods rest on the transport or accumulation rollers, which are fitted between the chain links. About Company name: iwis antriebssysteme GmbH & Co KG Headquarters: Munich, Germany Turnover: € 300 million Employees: 1,150 worldwide Products: precision roller and conveyor chains for material handling systems, packaging, printing and food industries Accumulation chains from Munich- based chain specialist Iwis feature special low-friction rollers that ensure an extremely efficient operation of the chain and therefore the entire conveying system. The low-friction rollers also allow easy positioning of the transported material at any point along the transport path and eliminate the need to “start-stop” the chain, which could influence product orientation and agitate contents. For logistics and material handling applications, different variants of Iwis accumulation chains are available, including versions with n Offset accumulation rollers for optimised load distribution n Chains with nickel-plated plates and pins for lubricant-free and maintenance-free operation n Chains with protection for fingers and small parts for increased machine and personal safety n Side-bow accumulation chains with offset accumulation rollers for conveying systems with extremely small bend radii Higher efficiency through low-friction rollers The idler rollers on both sides of the accumulating chain serve two purposes: firstly, they engage with the sprocket teeth to transmit power, and secondly, they support the chain in the profile.
MACHINE ELEMENTS 01 02 01 Side-bow conveyor chains with offset accumulating rollers are suitable for sideflexing conveyors 03 02 Maintenance-free accumulation chain with sintered self – lubricating rollers for reduced maintenance 03 b.smart-free conveyor chains are suitable for robust applications The slightly protruding bushes in the inner link prevent contact corrosion between the inner link and outer plate. To ensure that the goods being conveyed maintain continual speed, these chains are fitted with low-friction sintered metal rollers that provide consistent smooth running conditions. These low friction rollers increase the chain efficiency by 30 %, thus decreasing motor capacity due to lower co-efficients of friction or increasing potential conveyor length due to reduced forces. Optimised load distribution chains The standard accumulation chains have a single wide roller on every second pin, this version with offset accumulation rollers has offset transport rollers on every pin. As a result, each pin has a load-bearing function, so that the load is carried by twice as many rollers. This reduces the strain and wear of the chain guide. The offset arrangement of the accumulation rollers ensures maximum load distribution as well as better support and smoother running of the product. It can reduce localised load on chain guides by up to 50 % so plastic guides can now convey up to twice the normal load. Maintenance-free accumulation chains A special design with nickel-plated plates and pins and low-friction sintered metal rollers are the main features of the maintenance-free accumulation chains. These components negate the need for lubrication and help to further reduce maintenance costs while exhibiting excellent wear resistance under extreme running conditions. These chains are widely used in applications where lubrication is either not possible or could cause contamination. For example, food or medical products, electronics, glass, ceramics and many other industries. Improved safety Prevention is better than the cure! This is aparent for accumulation chains with finger and small parts protection feature. They cover the space between one transport roller and the next, preventing the ingress of small parts that could jam the rollers and/or chain link. In addition, the cover prevents deliberate or accidental insertion of fingers while the conveyor is operating to increase operator safety. Matched to the chain type and required bending radiús, the protectors provide 100 % coverage of the space between the transport rollers. The plastic clips are permanently fitted to the inner link. There is no interference with conveyed goods, workpiece carriers or transport rollers. Chains for sideflexing conveyor applications Side-bow accumulation chains with offset accumulation rollers are ideal for sideflexing conveying systems with tight bend radii down to 350 mm. The roller arrangement provides multiple contact points which reduces pressure on product through the bend. This can help to prevent marking or damage and also reduces wear on the system. Photographs: iwis antriebssysteme GmbH & Co KG www.iwis.com MDA Technologies 4/2015 23