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towlerg
(@towlerg)
Noble Member
Fitting parts together

This is really hard to describe. Somebody posted on the subject of fitting two printed parts together and rather than trial and error scaling, one part had tiny compressible nubs on the mating surface. Appearently a technique origination in injection moulding. Can anybody remember the name or even better a link to the thread.

Publié : 09/03/2021 3:15 pm
towlerg
(@towlerg)
Noble Member
Topic starter answered:
RE: Fitting parts together

I found it, it's called a crush rib.

Publié : 09/03/2021 3:29 pm
Dan Rogers
(@dan-rogers)
Noble Member
RE: Fitting parts together

compression ridges.  I read that article and know there were some prints with the examples, but I just can't find them.  Basically you loosy goosy the hole and add in 5 to 6 little lines for the length of the hole all around the inside.  When you push the rod into the hole, the ridges deform - sort of forcing a fit that is hard to get apart.

Publié : 09/03/2021 3:39 pm
bobstro
(@bobstro)
Illustrious Member
RE: Fitting parts together

I think you are describing "crush ribs" for press-fit injection molded parts. I think Angus did a session on this topic in his Maker's Muse YouTube channel, but I can't locate it right now.

My notes and disclaimers on 3D printing

and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan

Publié : 09/03/2021 3:40 pm
bobstro
(@bobstro)
Illustrious Member
RE: Fitting parts together

Looks like we were all writing our responses at the same time. Here's a nice article for anybody interested.

My notes and disclaimers on 3D printing

and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan

Publié : 09/03/2021 3:43 pm
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towlerg
(@towlerg)
Noble Member
Topic starter answered:
RE: Fitting parts together

@bobstro

Thanks guys.How you worked out what I wanted from my awful description...

Publié : 10/03/2021 8:43 am
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