Plastic Part design with Integrated hinges
Plastic Part design with Integrated hinges
(OP)
Hi, I am currently looking for technical specs and design guides for integrated hinges for plastic mouldings. Doe anyone have a website or link to a good source for this kind of information?





RE: Plastic Part design with Integrated hinges
RE: Plastic Part design with Integrated hinges
2. Design the part so it is molded with the melt flowwing across the hinge.
3. Start with hinge thickness = 0.005 inches. After first shots increase it if needed.
4. Instruct the mold operator to flex the hinge as soon as possible after the part is ejected.
5. Material strengh is increased dramatically in the hinge. typically in non-hinge areas, s=8000 psi. in the hinge s=80,000 psi.
RE: Plastic Part design with Integrated hinges
I am not aware of any guide for polymer hinges.
Maybe I should write one. Since I have worked on many closures. Many of the hinge designs are patented so I can not give any details regarding them. Although it may be a good idea for you to just go to your local store and take a look at the many designs that are being used. Common hinge designs are:
Bow-tie
Simple (single) strap
Multi-strap
The most perplexing problem with incorporating a hinge into your design is to properly put the design into the mold.
One place that you may want to try for a book is at the Society of Plastic Engineers website.
RE: Plastic Part design with Integrated hinges
Why would you not be able to include information from patented technologies? As long as they are properly referenced, I see no problem including this information. Patents are part of the public domain in terms of access to the information, but obviously not the use without permission from the assignee. The US Patent & Trademark Office website (www.uspto.gov) is a good source for information.
Best regards,
Matthew Ian Loew
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Plastic Part design with Integrated hinges
Anyone have an idea about getting around the mold cost (we are a small company and need to know start-up cost for a new item to establish sales price.
RE: Plastic Part design with Integrated hinges
How about multiple identical modules, hinged to each other with drive pins?
Mike Halloran
NOT speaking for
DeAngelo Marine Exhaust Inc.
Ft. Lauderdale, FL, USA
RE: Plastic Part design with Integrated hinges
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RE: Plastic Part design with Integrated hinges
RE: Plastic Part design with Integrated hinges
RE: Plastic Part design with Integrated hinges
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Why 6 hinges and not just 1 long one?
RE: Plastic Part design with Integrated hinges
Bill
RE: Plastic Part design with Integrated hinges
I came across a web site about "living hinges". I think that just means that it is integrated, but I could be wrong. I have never actually designed any of these, it just came up when I was looking for something else.
http://en
Hope this helps.
Dan