Problem with "Intense Lines" on Polycarbonate material using Extrusion

[VincentSantoso]

We are running on an extrusion machines, and we do have a problem with "lines" on our produced bottles. Previously we had adjusted our processing temperature on the extruder, however, when the lines about to dissapear we have a "wavy" textures visible on body parts.

What would be the relations between high temperature (that I assume from my experience), could make the "lines" disappear but somehow, causing visible "wavy" textures; with the tempering temperature?

Is it true that we should have looked for perfect temperature gap between parison coming out from die & pin, with mold temperature?

Appreciate any help on this matter, Thanks!

 

[Richar24]

Have you checked your die and parison for burrs or nicks?

Is the material sticking to the die? Are you using a coating on the die and parison?

Is your breaker plate fine enough to trap unmelted particles?