Well it's been a while and I managed to make my very first split mold. It was easy after all and the cutting wasn't as scary as I thought it would be.
But.. There's always a but. It doesn't work
.
I made a mold out of three 6mm scaled tanks with frontal gun and a small siren light on roof (like police cars).
The sprue is like this (yes I draw very well!)
There are 3 of those boxes side by side. The red drawings represent the frontal gun and the siren dome.
I use squeezing while pouring but every time the gun nd the dome fails. Sometimes even the rear end fails because air traps between the rear and the vent..
After 15 failed casts I need help...should I just make a new better mold or what?
And..I have used talcum powder, tried only to cast one at a time and even poured some resin first to the problem areas then closed the mold...but no use. Also I have enlargened the vents.
I use smooth cast 300 with 3min pot life which is too low really.. Will get 305 next time
HEEEELP