fear not the molds needed tweaking

[Lownslow]

the delay should eventually be fixed, leaky molds. i also got my hands on a pressure pot so theyll soon be bubble free parts

[kaho]

What is a pressure pot?

[mike@af]

Originally Posted by kaho

What is a pressure pot?

Basically a chamber that is air tight to either vacuum out the air or increase the pressure to remove bubbles. For molds vacuum is used, for resin pressure is used.

[Lownslow]

one of the molds assploded today so im done i can only cast one wheel at a time till i get this pressure pot set up(i broke the pressure relief valve) the other mold is going to Tonioseven

[kaho]

Originally Posted by Lownslow

one of the molds assploded today so im done i can only cast one wheel at a time till i get this pressure pot set up(i broke the pressure relief valve) the other mold is going to Tonioseven

Oh no! Is that caused by the pressure pot itself? Sorry I have no idea how this chamber thing works at all.

[Lownslow]

Originally Posted by kaho

Oh no! Is that caused by the pressure pot itself? Sorry I have no idea how this chamber thing works at all.

no, a pomeranian happened

[tonioseven]

Originally Posted by Lownslow

one of the molds assploded today so im done i can only cast one wheel at a time till i get this pressure pot set up(i broke the pressure relief valve) the other mold is going to Tonioseven

I'm honored but I wouldn't know what to do with it You should keep it and use it well grasshoppa!

[rsxse240]

...pomeranian happened.....roflmao I know the drill. My wife has an itallian greyhound, they are as hyper, but 10 times faster than a pom.

[Lownslow]

Originally Posted by rsxse240

...pomeranian happened.....roflmao I know the drill. My wife has an itallian greyhound, they are as hyper, but 10 times faster than a pom.

ok tonio ill keep it im pressure casting molds now cuase im sick of bubbles, yeah its kinda my fault i made it accessible but i never thought she was capable of jumpgin from the couch to the table thats quite a leap for a dog her size

[rsxse240]

here's a tip for the mold. you need to make it fill from the bottom to the top. when you go to make your first cast (first half of the mold) glue or somehow attach a piece of sprue that will wrap around from the bottom of the wheel to the top of the mold. this will be your FILL HOLE when the mold is complete. then make your vent hole from the top, of course. Before you pour your RTV, look at the wheel and position it in your mold box in such a way that when you fill the finished mold with resin, all of the air is pushed out and is not caught in a pocket creating a bubble in the part. I don't think the fill and smash method would work well in this application, but it might be a consideration.

[ariel]

It is a paint pressure pot you put you resin with the mold under pressure around 40psi. You can get one at Harbourfreight.com.

Originally Posted by kaho

Oh no! Is that caused by the pressure pot itself? Sorry I have no idea how this chamber thing works at all.