Single lip rotary die

Details Single lip rotary die Single lip rotary die

Category

B - Operations, Transporting

Subcategory

29

Subsubcategory

C

CPC

18/746

IPC codes

B29C 47/06 (2006.01) B29C 47/00 (2006.01) B29C 47/24 (2006.01) B29C 47/28 (2006.01)

Type

Patent

Patent number

CA 1229707

Description

SINGLE LIP ROTARY DIE ABSTRACT Disclosed is a single lip tubular extrusion die in which a plurality of separate melt streams passing through respective annular flow paths are fed to a common annular flow passage extending axially to and terminating at a die orifice. The annular flow passage is connected to the annular flow paths through respective groups of holes spaced annularly about the die axis. Each group of holes has its openings to the common annular flow passage spaced a different radial distance from the die axis to allow the separate melt streams to be layered in the common annular flow passage and co-extruded. One of the die lips is rotatable so that each melt stream produces a uniform layer of polymer in the extruded film while imparting a molecular orientation to the extruded film in the transverse direction (TD). An extruder-type seal may De provided adjacent a gap between a rotating and stationary part of the die to force melt attempting to penetrate the gap into the annular flow passage.

Application Number

448902

Affiliated with

Also associated with

Rating

Single lip rotary die does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Single lip rotary die, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single lip rotary die will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1231516