Foam extrusion die assembly

An extrusion die assembly comprisingg a die body, a pair of spaced lip members having opposed arcuate lips defining an orifice therebetween, each lip member further having an axially extending flexible leg to the rear of said arcuate lip and a foot at each end of said leg opposite said lip, and means for adjustably securing each foot to said die body and for pivoting each lip about its flexible leg to provide a desired die orifice size and shape, said means for pivoting including lip adjustment means engaged with said lips for positively driving said lips both towards and away from one another thereby to cause said lips to pivot about the flexing legs so as to vary both the size and shape of the orifice.

An extrusion die assembly comprising a die body having an extrudate passage terminating at an opening, a pair of spaced lip members at opposite sides of said opening, said lip members each having a lip, a flexible leg extending axially inwardly from said lip and a foot at the end of said flexible leg opposite said lip, said lips having opposed arcuate faces which define an extrusion die orifice therebetween, means for securing each foot to said die body, means for flexing said leg portions to pivot the lips thereabout to open or close the die orifice mainly at the center, and means for adjusting the spacing between the feet to open or close the die orifice mainly at the ends thereof.

A foam extrusion die assembly comprising a die body having closely spaced end extrusions, a pair of plate-like lip members located between said end extensions and having opposed arcuate lips defining a die orifice therebetween, each lip member having a deep groove therein to the rear of the arcuate lips defining a thin flexible leg interconnecting opposite ends of such lip member, one end of each lip member having said lip, and means contained within said groove for clamping the other end of each lip member to said die body.

An extrusion die assembly comprising a die body having a die body face and an extrudate passage in said body terminating at an opening in said face, a pair of spaced lip members extending outwardly from said die body face at opposite sides of said opening, said lip members each having a lip defining with the other lip an arcuate die orifice, a flexible leg extending axially inwardly from said lip and a foot at the end of said flexible leg opposite said lip, said foot having a face opposing said die body face and toe and heel projections extending axially from said face, means for securing said foot to said die body and for maintaining said heel and toe projections in sliding sealed engagement with said die body face, and foot adjustment means for adjusting the spacing between said feet while said heel and toe projections are maintained in such sliding sealed engagement with said die body face.

A foam extrusion die for extruding boards, planks, billets and the like comprising a die body, and a pair of die lip members including feet adjustably yet fixedly secured to said die body, each member having inflexible arcuate die lips defining an orifice, and a chordal flexing portion to the rear of said die lips to enable said lip members to be pivoted along said flexing portion to define an arcuate concave or convex die orifice.