Normally your peak pressure is at switchover, when cavity is most close to full, it could be an indication of a cold slug or some other restriction in the melt flow path. Check your graphs or do a...
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Normally your peak pressure is at switchover, when cavity is most close to full, it could be an indication of a cold slug or some other restriction in the melt flow path. Check your graphs or do a...
Maybe condition the parts in hot water for 24 hours?
We use dedicated hopper and material feed lines for clear PMMA, and a de duster from Pelletron.
I wonder if it is a "wide spec" material, where the MFI could have variation and still be "in spec". Can you correlate the defect to specific melt flows?
I had a similar problem where material had...
I've not heard of tonnage plates either, but with AL tools for structural foam molding we would put steel inserts in the parting line shut offs.