1/14 CAT 390D LME

[Jw.]

First attempt at making a 2 piece mold for the track pad and link bolted together out of a plaster cast. Since I don't have a cnc machine.

I was not sure if it was going to work and it didn't. It failed and cracked. The plaster it still slightly pliable after it sets(30 minutes or so) so I thought I might be able to slide it out ok. Even if I had added more water to soften it even more. The undercut on the track pad still would have deformed the mold. It was just a test anyway to see how the whole process goes.

The search is on for other methods. I'm considering lost wax, lost foam, or prototype metal mold casting. I will find a way to get this done. 102 track pads to go.






On the left side mold. On the bottom of the track pad is where the undercut is. That's where it cracked on me. Also I forgot to make a sprue or vent holes.