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  1. walkingcube

    Stepper motor slipping = damaged?

    Hi folks, I have a strange noobs problem that I can not wrap my head around. I have a plastic tubing stretcher that uses a stepper motor (Minebea 23KM-K709-07) to precisely do the stretching without going through any gearboxes etc. It was working just fine for a long time, until one day, the...
  2. walkingcube

    White patches on clear parts

    Hi folks, I'm making some thin-walled containers via stretch blow moulding out of clear PEBA and Nylon 12. On some runs, some of the parts have silvery-white patches on them, especially around bends and edges (ex: where the side wall meets the bottom). Any ideas on what might be the cause...
  3. walkingcube

    Stretch blow molding preform blues

    Hi folks! I'm running into this problem that I'm having issues wrapping my head around, and I hope that someone will have some ideas to inspire me. I was wondering if anyone has faced a problem where the preform used in SBM blows up 1/2 way during the stretching/inflation process. Tried...
  4. walkingcube

    Recommendation for strong clear film-grade material

    Hello, I'm currently looking into a material that can be blown into strong, (almost optically) clear films. We're currently doing some stretch blow moulding for a client on transparent bag-like food containers with very thin walls (.0025" in thickness) and have been experimenting with some...

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