Tuesday, June 29, 2010

Twenty-six grams

Well, this resin casting lark is a piece of cake - I can't see what I was ever worried about. ;)

I have started casting myself some of the APCs, but first things first. I was as careful as I could be while I removed the master from the mould, but I still managed to tear a small section. I think there was a fine gap between the hull and the plastic card base, and this allowed a small amount of rubber to get into that space. When I lifted the master out, it tore a tiny section of the mould out as well, so one of the axle stubs has a flaw beside it - indicated by the knife-blade.



Anyway, I cleaned up the mould, removing the wax and generally tidying up the edges, and then I tried a casting.

I measured the size of the void I wanted to fill, and I mixed up a little resin. A very little resin. Twenty-two grams of resin, to be precise. Fortunately I went and got a set of electronic scales from Tesco at the weekend, so I can get this accurately mixed up. I mixed, I poured, I realised that twenty-two grams may be precise, but it's precisely wrong. It's slightly shallow, but probably usable... or maybe I'll just keep it for posterity.


Anyway, since then I have cast another four APCs; twenty-six grams of resin is the correct amount to fill the mould and have just enough resin left over to make the hatch. It takes about 15-20 minutes to mix and pour the resin, wait for it to bloom and cool, remove it from the mould and clean up for another run. Not bad... and they are all small and solid enough that I don't have any problems with warping and flexing.

Final stage - attach some wheels to the hulls...


I have to say that I'm well chuffed with the way this has come out.

5 comments:

Kobold said...

Those look really neat! Thanks for the step-by-step. I'm beginning to seriously consider doing this myself.

Brandlin said...

looking good! I tried my hand at casting a while ago but as i play 28mm exclusively the models were a lot bigger and more expensive. and of coourse i didn't start on anything simple - i tried to make a big multi piece drop ship!

So i stopped casting and started laser cutting instead!

Anyway i just noticed that i was getting visitores to my blog from the link on yours so i thought i would come and say hi and reurn the favour :)

Streeters said...

Man, these look great. I'm going to start making some of these (I actually play 15mm).

For the utter noob, what resin do you use? I'm umming and ahhing about what the best one to get is.

Colin Hagreen said...

What's the best? I don't know - I'm a noob too!

I went to Tiranti's and bought RTV101 rubber for the moulds and Axson F16 resin for the castings; they seem to be working okay for me.

Gyro said...

Color me impressed, these are simply amazing.