A 50 mm Placo NLM extruder with an annular blown film die, Placo SG-16-100(125)F22 (an outer diameter of 100 mm, a die gap
at exit of 1.
The plastic that is exposed to air will burn (carbonize) during start-up, but little oxygen will get into the hard-to-reach die gap
In the extrusion stage, the parison shape is determined by the die geometry, die gap
programming, and flow rate.
The large Sleeves are being used with Inoex's first commercial Maxflexx adjustable forming chambers, which redirect melt from the existing die gap
into different pipe diameters.
We also pay attention to separate effects of die gap
on diffusive surface transport and shear rate.
But if you must go cold, leave the head and screw full of resin to block air entry and use the parison programmer to close the die gap
HDPE composites having between 5% and 20% (by weight) long fiber content were extruded at different processing conditions (extrusion speed, die gap
, hang time).
Instead of expensive and fixed-size flexible die rings, Uniloy's new Thickness Compensation System (TCS) uses a different approach to modify dynamically the die gap
in the final section of the head, according to Marco Solinas, Uniloy product manager for industrial applications.
The coordinate y is measured from the die gap
In 2002, Brampton Engineering introduced a segmented die based not on heating the lip, but on deforming it to alter the die gap
Hence, to eliminate tearing one must always thin the die gap
developed the new technology, which uses sliders on roller bearings to reduce friction and the amount of force needed to adjust the die gap