I got an e-mail from a friend today asking:
"We keep running into problems with designers and living hinges. They have no experience and draw up hinges that do not work! Do you have a reference or is there a place I can send them when the need help?"
Good idea. How's about a little refresher on living hinges? Like I told him, in addition to designing the part detail correctly, you should also carefully consider:
Polypropylene Design Guide from Dow
eFunda's Design Elements: Living Hinges
"Care and feeding of living hinges" from Machine Design
"Design Tip for Lving Hinges in Polypropylene" from Huntsman (PDF)
Enjoy.
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