plastic latch 1

[meh70us]

I am designing a plastic cover with a latch and plastic hinge. Is there any online documentation or share ware describing design concepts for snap fits and plastic hinges?

 

[mloew]

meh70us,

This topic, at least in part, was covered in prior threads. Try the thread thread288-34812: Plastic snap fits on cylindrical components. Try also searching on Google.com.

Best regards,

Matthew Ian Loew

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora

 

[Biggadike]

If you get the CD ROM from Bayer Plastics, it contains a lot of very comprehensive design documents in PDF format, one of which covers the design of latches in plastic.

 

[actaris]

I designed a similar part a couple years ago. Polypropylene is your best material for a living hinge, although I have heard of people using polyethylene and nylon.

Try GE plastics. You will need to register and get a password.

Here is their design guide for living hinges

http://www.geplastics.com/servlet/x...esearch/en/techniguides/xsl/techniguides1.xsl

And here is thei guide for snap fits.

http://www.geplastics.com/servlet/x...esearch/en/techniguides/xsl/techniguides1.xsl

Like Biggadike said, Bayer Plastics has some good info on Snap fits:

http://bayerplastics.com/pdf/A1119DE.PDF

Dow has some info on living hinges here:

http://www.dow.com/polypro/techctr/design/fig_tab/livhinge.htm

Efunda has some good stuff too:

http://www.efunda.com/designstandards/plastic_design/plastic_intro.cfm