Setting the Heat Profile

Achieving the proper heat profile is as important a factor as balancing the heat source. Although an “ascending“ profile is recommended by many resin manufacturers and is used successfully in some situations, the experience of our customers has confirmed that the use of a “hump” or “reverse” profile produces an optimum melt quality at the lowest cost and, screw and barrel wear is minimized. The use of each of these profiles has merit in certain situations as detailed below.

  • Reinforced, heavily filled or hard-to-melt materials
  • Unfilled materials, high to normal range shot size
  • Long residence time, small percentage shot size
  • Resin not reinforced or filled, low to normal range shot size
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