SLOT DIE FOR EXTRUSION DEVICE
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United States of America Patent
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May 26, 2016
app pub date -
Jun 11, 2014
filing date -
Jun 28, 2013
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Abstract
The invention discloses a slot die (10) for an extrusion device for the extrusion of preforms (1) in web or strip form from thermoplastic material which comprises a die gap (11) extending transversely to a direction of extrusion and intended for delivering a preform (1). The slot die (10) is characterized in that it comprises at least one adjusting element (12), which is arranged peripherally in the die gap (11), limits a widthwise extent (SB) of the die gap (11) and is mounted continuously displaceably and/or pivotably with respect to the die gap (11). The widthwise extent (SB) of the die gap (11) is dynamically and continuously variable by displacing and/or pivoting the adjusting element (12), so that a widthwise extent (VB) of a preform (1) extruded from the slot die (10) is continuously and infinitely variable over the length of extrusion thereof.
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