The place to discuss filament...
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sTaLa
- Posts: 43
- Joined: Tue Jun 14, 2016 3:01 am
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by sTaLa » Tue Sep 20, 2016 2:24 am
Yeah the first time I designed one with multiple holes of different diameters. But I quickly found that the shrink factor was not the same depending on the size of the hole. I was looking for a way to apply a general factor that would allow to have a part pretty much into specs.
Then I found your cross with the Excel table. That saved me time thank you very much for that!!!
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sTaLa
- Posts: 43
- Joined: Tue Jun 14, 2016 3:01 am
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by sTaLa » Tue Sep 20, 2016 2:59 am
Here's my 70 hour print in PETG!
That thing reallys is filled with air channels. I am going to use it to insert labels into injection molding molds and then pick up parts.
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Jules
- Posts: 3144
- Joined: Wed Jan 21, 2015 1:36 am
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by Jules » Tue Sep 20, 2016 4:00 am
Great job!
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sTaLa
- Posts: 43
- Joined: Tue Jun 14, 2016 3:01 am
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by sTaLa » Wed Sep 21, 2016 1:24 am
Thanks Jules!
I am running into some issues though. I was worried this could happened and should have run some trials first, but I was optimistic.
My air channels are sadly not air tight. I need to find a way to solve this.
You can see what I am talking about here:
viewtopic.php?f=2&t=4466
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Jules
- Posts: 3144
- Joined: Wed Jan 21, 2015 1:36 am
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by Jules » Wed Sep 21, 2016 2:16 am
Yeah, you're going to have to seal it somehow. 3D printing isn't air-tight.
XTC-3D maybe? Or spray varnish? Hmmmn......
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jimc
- Posts: 2888
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- Location: mullica, nj
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by jimc » Wed Sep 21, 2016 2:20 am
yes 3d prints arent water or air tight. atleast not 100%. you could maybe dip it in epoxy but that would be really expensive, messy and a pia to make sure the epoxy doesnt run, collect and end up blocking one of you air channels.
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zemlin
- Posts: 467
- Joined: Thu Feb 04, 2016 9:32 pm
- Location: Indianapolis, Indiana
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by zemlin » Wed Sep 21, 2016 1:42 pm
I have some EASY CAST 2-part epoxy I got at Michael's craft store. It's low viscosity and paints on pretty easily. The down side is the long cure time. I have used that to seal up some areas of PETG parts. It's thin enough you could probably pour/syringe it into your part and then pour it out if areas are inaccessible. An air-blast through the ports would probably work to clean out excess.