Where can I find design guidelines for a bi-stable butterfly hinge (like a ketchup bottle lid)?
Thanks, Bob. I will post the question there.
..yeah, someone posted a model there.. ...but,.. the hinge looks like a loft/blend.. it does not have the creases for the folds..
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Thanks Paul. Yes, it's done with a Boundary Surface and a Thicken. It's close, but still looking for some of the finer details.
The designer posted a link to a blog in the comments about how to do it, but the link is no longer valid. (It has been ~4 years.)
See if these help you at all.
Thanks Chris. However, these only seem to show the guidelines for a flat, straight living hinge. The ketchup cap has a bowtie shape since it comes off round parts.
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