Clipping design standard for plastic case (PP) 1

[Meach29]

Hello,

I am currently working on a 3D design of some kind of plastic case. This case comprise a top and bottom part which are clipped together.
Our partners want to change the current material to PP (I am not a material guy at all) and told us that since PP is quite soft plastic, we would need to re-design the clipping method.
Some standard exists for that apparently but I cannot find anything relevant on internet.

Can someone is aware of where I could get such information?

Thanks!

 

[MikeHalloran]

The word 'clipped' implies use of some kind of fastener, e.g. a hog ring or a staple or something similar. Some number of clips would then comprise a third line item on the assembly bill of materials.

However, concern about the alleged 'softness' of PP suggests that maybe you are talking about a 'snap fit', where the ramp, spring, hook and latch type details are all molded as part of the case components, so there would still be just two part numbers.

Since you have told us nothing about the current parts, including size and material, that's probably all the help I'll be able to offer.


Mike Halloran
Pembroke Pines, FL, USA

 

[patprimmer]

Mike

I guess language might be an issue, but the OP was so lacking in required detail irregardless of language I just did not bother to start playing 20 questions to extract what should have been in the OP.

OP

If it is indeed a snap fit. Many PP raw material manufacturers publish intricate detail on snap fit design.

Regards
Pat
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[Meach29]

Thank you guys,
What I am looking for is indeed a snap-fit. Problem with my post lacking details and so on is that this is totally not my field. I didn't wanted to described too much in the OP because as patprimmer said language might be an issue and my explanations would have certainly not been understood

But now I at least know how this kind of feature is called and I have more elements to continue my researches.

 

[Jabmaster]

Most of the times, properly designed snap fits will work regardless of the material as long as you stick to commercial thermoplastics.
Maybe you can send me screenshot of the product and I can give you my feedback.

 

[patprimmer]

As far as I know, all major reputable raw materials suppliers still supply recommendations and formula for making snap fits with their materials.

Certainly Ticona and DuPont do. I very strongly suspect Bayer and BASF do. I would be astounded if whatever Shell (Lynden Basel?) is called now and Sabic do not

Regards
Pat
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for site rules

 

[Pud]

Here's one snap fit guide

H

www.tynevalleyplastics.co.uk

It's ok to soar like an eagle, but weasels don't get sucked into jet engines.