Made a bit of progress last couple days been sick for 2 days
Here is my set up for degassing silicone rubber for casting resin parts.
The bin is made out of 4mm stainless steel welded by a m8 of mine that makes stuff out of stainless steel so he can make a pretty good weld.
The bin is 300mm dia and 350mm high.
On top of that there is a rubber L gasket to seal of the bin, on top of the rubber there is a Lexan plate of 350x350 and 15mm thick.
For the valves i used 1/4 tread which is connected to the vacuum pump whit a rubber hose.
The pump it self pumps 2cfm which takes about 2 min to fully vacuum the chamber to -1 mbar absolute vacuum.
Here is the silicone i used mixed by ratio of 5% of harder.
Mixed with a steel knife as to not introduce moist from wooden sticks.
As you can c its full of bubbles.
took it in the chamber and pulled vacuum keep watching the process since the rubber will expand.
Keep in mind that the rubber will expand about 3 times so a large enough mixing container is needed i made 150ml so i need a container of 500ml.
Eventually it looks like this, i poured it in the mold starting from one corner.
This is what iam making weighted wheels.
Anny one that needs some wheels send me a PM and i can cast a pare, or more.
Cost i don't know yet since i don't know how much resin i need to cast them yet.
Made the front wheels of spare parts and vacuum pulled the covers for it.
Made a plug for the under side of the fuselage, to later vacuum pull.
Made the aileron control pins.
Detailed the tail with struts and tail skid.
Made the struts from brass and solder wire of 0.3 so i can glue it on the tail wing.
End result.
Ron.
