Hello,
I wanted to ask for help those familiar with processing of EVA. I came across with an issue on parts that are made of natural color EVA. The problem is that with every start-up there is a lot of scrap in the form of black specs. We decided to pull the screw out of the barrel and what I saw frightened me. The screw is corroded, or at least it seems to me like this. I think the injection unit is not suitable for processing of EVA. I already asked the OEM what resins can be processed, but have not got answers yet. I also found out that this machine had processed natural PA6 for 4 months which could also damage the screw. What are your experiences with this kind of issue? Is it possible to polish the screw and barrel and then coat it with something to resist the corrosive environment?
Thank you for your input.
Rojan
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