Fewer Heating Zones in Long Nozzles
At Fakuma 2009, Incoe International Europe, Rödermark, Germany, exhibited the AXR option for long hot runner nozzles. This permits operation with two instead of the usual three heating zones. This has been made possible by the new ultralong AXR heaters. Over the greater length of these extended heaters, the temperature profile can now be adjusted so as to render a third heating zone unnecessary. According to the manufacturer, omitting the third heating zone is appropriate for processing less technically demanding plastics such as PP, PE or PS. This reduction in complexity benefits customers, because - assuming the desired processing quality can be maintained - it allows one heating zone to be saved per nozzle, for which customers would otherwise have to provide the required controller capacity.
The AXR option also offers some other useful design features. An additional centering collar on the nozzle body protects the nozzle and cable from damage during installation and dismantling. Since the wires running along the nozzle body are countersunk or snug-fitting, it is possible to dispense with the cable groove in the mold. A circular clearance in the mold is sufficient. According to Incoe, the AXR option is of particular interest to the automobile market, in which large systems with long nozzles are used, e.g. for the production of bumpers, wheel-arch liners and interior door panels.
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