Alternative Energy Products

Designing Plastic Parts for Assembly?

I would like to have some study material for assembly features we use in plastic parts such as Snap-fits, dog-houses, locators etc. I want to have information on different types of snap-fits, locators, dog-houses and their design assumptions. Can anyone suggest me where I can get this online. I am not interested to buy any book. I will appreciate if anyone suggests me any online guide for this. Thanks.

Maybe this can help you

http://www.toboc.com/forum3/DEFAULT.ASPX?g=posts&t=837

http://oil_purifier.toboc.com/forum3/default.aspx?g=posts&m=1077

http://www.toboc.com/forum3/default.aspx?g=posts&m=983