Introduction: 3D Printing Snaps

Picture of 3D Printing Snaps

I had a lot of trial and error and wanted to share my findings

Step 1: First Print

Picture of First Print

I wanted to create a simple dove tail snap to connect pieces to one and other. PLA doesn't do well with shear stress and they kept shearing right off.

.

Step 2: Re-design

Picture of Re-design

The simple snap in step one kept shearing off. So I then added extra material to the cross sectional area as shown in my part file. You can see the difference between the thin and thicker snaps.

Step 3: Something in Between

Picture of Something in Between

I also tried something that added to the cross sectional area but wasn't as clunky. This can see as the snap on top in the photo.

Step 4: Printing the Changes

Picture of Printing the Changes

I then used a type A machine to do the prints. I did the two new snaps side by side to see how they compared.

Step 5: Other Design Change

Picture of Other Design Change

I added a chamfer to the other side if the snap. This allowed for it to slowly deform and stretch. Without it the snaps were shearing off. It made the process more gradual when attaching.

Side note: I put 0.25mm clearance between the snaps to give room for shrinkage, etc. for the plastic.

Step 6: Final Design

Picture of Final Design

Through all my trials and tribulations I got a nice snap fit that allowed my parts to click snuggly together with out breaking off.

I hope all of this helps. It was all done at the TechShop. Their website is TechShop.ws

Comments

Kokskuld (author)2017-05-02

Thanks for sharing!

MarcR5 (author)2015-06-09

This saved me some troubles

About This Instructable

11,774views

16favorites

License:

More by rcrossen:Printrbot Simple X-axis UpgradePrintrbot Simple Y-axis Belt Driven Upgrade3D Printing Snaps
Add instructable to: