Stuff you have made today

[Hood]

Do you need to apply some kind of mould release? I was looking at polyproylene to avoid using a mould release spray for a future project but I'm sure I could get a better finish machining acetal.

No, not for acetal, if a metal mould then I believe you do.

 

[indykid]

No, I have no idea how TPU compares to the epoxies used for tables but I've seen people pouring epoxy using a blow torch to go over the epoxy after is been poured to degas it (bring the bubbles out).

I think the blow torch is just popping the surface bubbles to give a shiny finish between pour layers, not degassing the bulk volume as such.

The only way to degas reliably (IME) is with a vacuum chamber as it makes the bubbles big enough that they can't stay in 'suspension', though if you can mix the components without introducing too many bubbles rather than whipping it together, that would be beneficial too.

 

[sako243]

I think the blow torch is just popping the surface bubbles to give a shiny finish between pour layers, not degassing the bulk volume as such.

It does in that video but I've seen people using it on others. As I said I don't really know it was just perhaps something to try, some seem to use the blowtorch on the bucket pre pour, others have special things they stick in or the buckets in to help degas.

 

[Cato]

Well that's the flat end of the rail track anvil sorted. Bit of a polish to clean up the cutter marks, and a flick of the flap wheel to chamfer the sharp edges out and it's good to go.

 

[Morris]

I must finish my rail track anvil, I only started it 2 years ago

 

[Cato]

I must finish my rail track anvil, I only started it 2 years ago

I got it sorted as soon as it was here for exactly that reason. 'Next week' somehow seems to become a year or two later before you realise it.

 

[arther dailey]

Been working on this one for weeks but today it's finally gone outside to gain some rusty 'character'.
18" from tip of beak to tip of wing.

View attachment 521781

you go fom strength to strength, excellent

 

[arther dailey]

Just demoulded the 85 shore one I poured last night and it has come out a lot better. It is tough but flexing without cracking.

85 shore on left 20 shore on right.

View attachment 522063

I managed to pull it over the 16mm ball, it was tough to do but didn't crack.
It seems to be working great so far, not squishing out when I clamp the flange but I think maybe a 50 shore might be a better compromise.


View attachment 522064

to ease the stretching dunk in really hot water for a few minutes .

 

[Hood]

Just demoulded the 40 shore one I let sit for 5 mins before pouring and lot less bubbles in it so happy with that