DIEDES II

Software for the Design and Analysis of Sheet, Blown Film and Strand Pelletizing Dies

OVERVIEW

The interaction between operating conditions, material flow properties, and die geometry are complex. As a result, product uniformity and quality are profoundly affected by extrudate temperature, production rate, sheet thickness, extruder head pressure, temperature profile of the die, choker bar and flexible lip settings and the die design. Even minor changes in the operation of a line, or in the properties of the material processed, may greatly upset production. DIEDES II accurately defines the relationships and calulates uniformity and sensitivity of the process to material, equipment and operation changes.

BENEFITS

•  Accurately describes the performance of even the most complex dies. It can calculate the flow uniformity and temperature rise of material processed through coathanger or T-slot type dies.
•  Automated optimization of the design details of a die to insure completely uniform material distribution.
•  Can evaluate dies with constant or varying manifold angles.
•  Distributor length can change non-linearly through the width of the die.
•  Designs manifold geometries which will produce a uniform product while permitting users to specify any number of complicating details, including variable height sections through the die width, variable distributor height through the width of the die, non-uniform temperature profile to be maintained, or combinations of these factors.
•  Computes the exact choker bar adjustment and lip settings across the width of the die necessary to correct flow non-uniformity and makes the die more flexible to resin changes.
•  Computes the required temperature profile to produce a uniform sheet.
•  Calculates temperature profile settings to insure product uniformity.
•  Computes operation changes to compensate for batch to batch or other changes in raw material properties.
•  DIEDES II helps you design the details of a new die and computes steps required to improve performance of existing die. You can design dies that can produce a perfect product from a variety of grades of newtonian or non-newtonian materials.
•  Predicts uniformity of co-extruded layers.
•  Finds optimal operating conditions reducing trial and error. Fast setup time for new dies.
•  Integrated to SPR’s EXTRUD®- PC program for extruders which extends the benefits of computer simulations through the whole extrusion process from the pellet feeding through melting and final product formation.
•  Links to SPR data base of over 5,000 polymeric materials.