Extrusion die for extrusion apparatus for extruding thermoplastic materials, has internal deckle system comprising, in downstream order, inner deckle rod, where front end of deckle rod facing passageway has pointed shape and is chamfered

摘要

An extrusion die (12) has an internal deckle system comprising, in a downstream order, an inner deckle rod, where a front end (36) of the deckle rod facing a passageway (14) has a pointed shape and is chamfered. An extrusion die has an internal deckle system and comprising a flow passageway extending to an exit slot (24), the passageway comprising, in a downstream order, a supply channel (16), a transverse distribution manifold (18) and a channel portion, the internal deckle system comprising, in a downstream order, an upper deckle component (30, 30'), a lower deckle component (32, 32'), and an inner deckle rod, each of which deckle components is adjustably arranged to change the width of the passageway, where a front end of the deckle rod facing the passageway has a pointed shape and is chamfered.