Mold making is considered an art form. Specialised people within certain industries are pulled in to purely to make molds.
Your method and mold is outstanding. A lot of time has gone into this, and it clearly shows.
What mold release do you plan to use.? I hate to see these things bond.
Thanks, man. I really appreciate your comments. As for mold release, Stoner was nice enough to send me a couple sample cans, one of them being spray on silicone release. The silicone doesn't typically bond to anything but silicone but I'm hoping it will help with pulling the mold out of the positive.
I’m very impressed with everything. I have been machining stuff out of aluminum but I like the quality of the molded parts. It looks a little complicated since the mold cavity looks like it has to be a negative to give a positive part and vice versa. I would have to think inverted and I know I would be making a bunch of mistakes. Are the molds a onetime use or can you reuse them over and over again?
Thank you to you, too. With the method I use there's no need to have machine the inverse of the part. And thank goodness because that would definitely be a pain. The picture below shows how I do it. I machine the parts in the prototyping media on the right just as they are, no need for the inverse. Then I pour silicone in it to create the negative which produces the blue mold on the left. The molds with last for 10+ casts at least, the silicone I use is decently flexible. If I'm careful with them they'll last longer.
mold example.jpg [ 3.34 MiB | Viewed 490 times ]
Michal Zalewskis 'Guerilla's guide to CNC machining and mold making' is an awesome resource. Check it out . http://lcamtuf.coredump.cx/gcnc/