RC Tank Warfare community hobby forum

I've been printing for a few years but this is the first time I've heard of this-
https://monkeypuzzle.co.uk/shop/blog/d ... -stronger/
Their test suggest it doesn't works but has anyone else tried it?

Edit cos I read it wrong.

Been reading up on it and results depend on how you heat it up and how much moisture is in the printed part. Also the cooling seems to be critical. Done right and it can increase the strength by up to 40%.

UPDATE
New links that go into it a bit more-
https://www.fargo3dprinting.com/anneali ... ts-better/
https://rigid.ink/blogs/news/how-to-ann ... r-strength
https://toms3d.org/2016/10/29/bake-your-pla/

I thought they said the results were the annealed parts failed at lower loads than the un-annealed?

rochesb wrote:I thought they said the results were the annealed parts failed at lower loads than the un-annealed?

Yep. read it wrong.

Shame,

Having had some issues with PLA layer separation I was hopeful ,I thought 'baking' it seemed like a good idea.

I can't see how this can possibly work.
If the print temp needs to be 240 to properly melt and bind together with previously printed layers, then 100 degrees isn't going to soften the plastic enough for the joins to bind any more than they have. Surely to achieve such binding, one would have to heat it up enough for the layers to melt together, which in turn would melt the whole thing as the whole thing is subjected to the same temperature.
All that heating below melting point in an oven would do is soften the plastic a little and cause the layers to distort causing weakness in the bond.
Sounds like an early April fools to me.

But as annealing makes it worse, the uneven thermal expansion likely causes the layers to debond.

RobW wrote:But as annealing makes it worse, the uneven thermal expansion likely causes the layers to debond.

Yes, inside takes longer to heat up than the outside, maybe try this "annealing" in a combi microwave. . . .

RobW wrote:But as annealing makes it worse, the uneven thermal expansion likely causes the layers to debond.

Annealing can make it stronger if done right.

More reading-
https://www.fargo3dprinting.com/anneali ... ts-better/

https://rigid.ink/blogs/news/how-to-ann ... r-strength

I can see this working for an injection moulded piece. And I can see it working for the individual layers in printed parts because it takes away the brittle composition to make the plastic more malleable. But unless that layer bonding is spot on, and welded together securely, surely the bond is vulnerable?!