Flat die maker Extrusion Dies Industries LLC's a new, motorized dual deckle — with a spring-loaded external segment — lets extrusion coating processors automate width changes, increase the precision of deckle settings, reduce or eliminate manual adjustment and cut downtime between job changeovers.
A deckle is a mechanism that varies the width of the web by blocking off portions of the flow at either end of a flat die.
An alternating current motor drives the external deckle, together with the primary internal deckle as a single unit. A smaller motor drives a secondary internal deckle that fine-tunes the flow at either end of the die, to minimize the formation of edge bead. Motorizing the deckle makes it possible to run the deckle as part of a computerized processing system.
EDI in Chippewa Falls, Wis., also has replaced the standard manual fastener adjustments for the external deckle, with a spring-loaded device that provides constant pressure at the die lips, permitting width changes with little or no manual adjustment.
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