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25th November 2020, 01:35 PM
#7
Re: Problem during TPE processing
As Pilot mentioned above, sharp edges in the melt flow path can cause burning. Check that when the gates are open, the valve pins are retracted out of the flow channel. If not, material flowing past the end of the pins may see excess shear and burn on to the pins. If that is what is happening, see if you can use shorter pins with longer travel.
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