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3/6/2017 | 1 MINUTE READ

EXTRUSION: Melt Filters Offer Easy-to-Change Screens

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Cuts by 50% the force required for switching screens.

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New-generation manual screen changers from Nordson Corp. (U.S. office Hickory, N.C) are said to cut in half the force required for switching screens on the extrusion line, making easier a task that used to challenge the strength of some machine operators.

Like standard manual screen changers from Nordson, the new BKG NorCon EMR and XMR models provide a less expensive alternative to stationary screen-changer systems. The operator replaces a contaminated screen with a clean one by turning a handle or lever that activates an indexing system. The new EMR and XMR screen changers contain a ratchet mechanism that reduces the force required to turn the handle. This mechanism can also be retrofitted onto corresponding standard models, EM and XM, at either the customer’s plant or a Nordson technical support facility. While EMR and EM units are for use with extruders sized in inches, the XMR and XM units are for metric equipment.

As an example of the reduction in screen-switching force, tests by Nordson showed that the NorCon EMR-35 unit requires 25 lb (111 N), as against 50 lb (222 N) for the EM-35.

Available standard NorCon manual screen changers range from 10 to 65 in. for EM units and 30 to 120 mm for XM units. EMR and XMR models are available in most of these sizes

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