Controlling flow inside the
die to give the desired velocity profile at the die exit; and
Since dies must evenly contact the cutting or striker plate to ensure a clean PET cut and avoid damage, accurate "make-ready" of the
die to cutting plate is critical.
The general practice is to lubricate appropriate locations during the shutdown of a die to ensure protection from freeze-up.
Detail maintenance needs to be completed prior to the next run upon die shutdown, making sure to keep the last casting shot with the die to review for visual signs of component wear.
The roll rotation pulls the banked compound in the preform die past the final
die to produce the desired shape;
The other almost instantly diverts melt flow from one stationary
die to another.
