If non-melted resin particles are noted in the molded part what corrections might be made?
What will be an ideal response?
The first step in solving the problem would be to investigate the heating. Are the temperatures too low for this resin or are there cold spots where the heaters are not operating properly? Is the polymer being mixed homogeneously or are dead spots occurring? Is there a combination of effects of heating and mixing? Lastly, is the feed homogeneous? The presence of large and small particles in the feed will complicate the melting process because the large particles take more time and energy to melt than so the small particles. This last problem may require some separation of the particles or a homogenizing step such as re-extrusion.
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