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Author Topic: 3d Printing a breech  (Read 395 times))

Offline BigBird

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Re: 3d Printing a breech
« Reply #20 on: September 14, 2021, 11:17:21 PM »
Heat treat your guns?  Maybe not like they did with the 1903s (PB) a few times till they got it right... then started doing it another way.

How about heat treating PLA?

Start with a higher grade high temp plastic and anneal.  It has to be better than relying on the print nozzle to fuse hot to already cooled.

https://www.pushplastic.com/products/premium-pla
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Offline Scotchmo

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Re: 3d Printing a breech
« Reply #21 on: September 14, 2021, 11:28:45 PM »
Heat treat your guns?  Maybe not like they did with the 1903s (PB) a few times till they got it right... then started doing it another way.

How about heat treating PLA?

Start with a higher grade high temp plastic and anneal.  It has to be better than relying on the print nozzle to fuse hot to already cooled.

https://www.pushplastic.com/products/premium-pla

When the slicer and printer are setup correctly, the PLA parts have near 100% consolidation. Typically good to go.

If one still wants to "heat treat" or "anneal" PLA parts after printing, I would recommend packing in sand prior to doing so. Unsupported PLA can easily lose it's shape when heated any significant amount.
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Online sb327

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Re: 3d Printing a breech
« Reply #22 on: September 15, 2021, 01:40:05 AM »
From my understanding, heat treating 3D prints is only done to relieve internal stresses and not for adhesion.

Dave
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Dave

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Re: 3d Printing a breech
« Reply #23 on: September 15, 2021, 01:51:37 AM »
MrP on this forum paints his 3D prints with epoxy resin to strengthen them.  The rougher and more porous the print, the more resin it absorbs.

Of course, if you can print parts such that their strength is nearly the same across and along the filament, then little after treatment should be required.
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Offline wimpie swart

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Re: 3d Printing a breech
« Reply #24 on: September 18, 2021, 02:41:45 PM »
Thank you one and all; for your input to this thread!!!
Somebody asked; I am using a Creality Ender 3 Pro as well as a Creality Ender 3 V2.
Will have to bench this project for a while, other priorities have taken residence.

I will be discussing aluminium casting with a local guy here, at a later stage.
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