Die for extruding flowable materials and having a static mixer therein
AssigneeThe Procter & Gamble Company
InventorsShaffiq Amin Jaffer, Mark Lewis Agerton, Geoffrey Marc Wise
Life of this patent
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Abstract
An extrusion/coating die. The die has an internal cavity and one or more static mixers in the die cavity. The static mixer fills the die cavity at its respective cross section. The die may also have one or more auxiliary inlets for separately admitting material/energy to the die.
Claims18
A die for extruding flowable material therethrough in a longitudinal direction, said die having a die inlet for admitting flowable material and a die outlet for expelling flowable material, said die inlet and die outlet being oppositely disposed on a longitudinal axis, said die outlet having a cross sectional area defining a die outlet plane having a major axis and a minor axis orthogonal thereto, said major axis being greater than or equal to minor axis, said die having a cavity connecting said die inlet and said die outlet, said cavity having a plurality of cross sections perpendicular to said longitudinal axis, said cavity having a static mixer therein, said static mixer having openings therethrough oriented substantially at an angle relative to said longitudinal direction, said static mixer having a static mixer outlet defining a static mixer outlet plane filling said cavity at a cross section, said static mixer causing flowable material to flow in a first direction having a component parallel to said major axis of said die outlet plane and later in a second direction having a component parallel to said minor axis of said die outlet plane as said flowable material is within said cavity, wherein said static mixer outlet plane and said die outlet plane are coincident.
A die for extruding flowable material therethrough in a longitudinal direction, said die having a die inlet for admitting flowable material and a die outlet for expelling flowable material, said die inlet and die outlet being oppositely disposed on a longitudinal axis, said die outlet having a cross sectional area defining a die outlet plane having a major axis and a minor axis orthogonal thereto, said major axis being greater than or equal to minor axis, said die having a cavity connecting said die inlet and said die outlet, said cavity having a plurality of cross sections perpendicular to said longitudinal axis, said cavity having a plurality of static mixers therein, said plurality of static mixers being disposed in series between said die inlet and said die outlet whereby at least a portion of said flowable material passes through two or more of said static mixers of said plurality, one said static mixer comprising a stage of bars imparting flow to said flowable material in a first direction relative to said longitudinal direction, and a second static mixer of said plurality of static mixers comprising bars imparting flow to said flowable material in a second direction relative to said longitudinal axis, said first direction and said second direction defining an included angle therebetween of at least 45 degrees, at least one said static mixer filling said cavity at a cross section imparting bilateral flow to flowable material as said flowable material is within said cavity and passing through said static mixer.
A die for extruding flowable material therethrough in a longitudinal direction, said die having a die inlet for admitting flowable material and a die outlet for expelling flowable material, said die inlet and die outlet being oppositely disposed on a longitudinal axis, said die outlet having a cross sectional area defining a die outlet plane having a major axis and a minor axis orthogonal thereto, said major axis being greater than or equal to minor axis, said die having a cavity connecting said die inlet and said die outlet, said cavity having a stalk mixer therein, said static mixer having a plurality of bars for directing the flow of material in said die cavity, at least one said bars for admitting energy through a window substantially transparent to the transmission of energy therethrough to said cavity of said die.
Dependencies are inferred from the claim text.