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TK8776 jgarrettg

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Posts posted by TK8776 jgarrettg

  1. Wow! that's quite a defect. I imagine it's the point where the plastic lifts off the buck just before the vac is applied. After the vacuum pulls the plastic in on the buck it kind of stretches or pulls at that point probably because there is a temperature difference between the plastic touching the buck on top and the plastic that hasn't lost as much heat. I can think of a lot of reasons for this. An extremely cold buck, a sticky buck (more talcum powder to allow the plastic to move on the surface), Thicker plastic that won't lose it's heat so fast as it touches the buck or quicker vacuum application. Interesting problem to solve. I hope you get it worked out with the vendor Sarah.

  2. Trying to stretch the shin like that without destroying it might be tough. Unless you just need to change it's shape just a bit. I've tried the boiling water trick but didn't have much luck with it. ABS becomes pliable near 350 deg. Boiling water is around 200 deg. depending on elevation. The heat gun blows at around 450 deg. I've heard of guys putting parts in the oven set at 350 deg. for just a couple of minutes to warm them up. Either way be careful and wear gloves. I made a slump mold like this to form my side shims. Worked pretty good. Not sure I'd try it with a whole shin unless I had a form to lay it over.

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