Vacuum Desiccator made of PVC pipe

[chy_farm]

This tool is used when you want to make parts that should have elasticity like rubber, so in a case you use Room Temperature Vulcanizing (RTV) rubber silicone, or liquid polyurethane. Below is a simple example I did some years ago.

Making a mock-up with cray;


Place them in a container and pour liquid plaster to the top edge of the cray;


Take out the cray and brush off inside of the room;


If needed place the part you need. In this case I placed a couple of polyurethane bars inside, that I will take out off the place after cure, in a purpose to get a little more elasticity to this rubber part.


Now it's the right time you use this tool, Vacuum Desiccator!
Make mixture of A and B types of RTV silicone rubber, star it well.
Place the container of this mixture inside of this Vacuum Desiccator, and turn on the vacuum pump.
Keep the motor run for a minute or two, knowing a lot of foam coming off from the liquid mixture.
Kill the motor and take out the mixture, pour it into the mold;


Keep the mold still for required time, take them out with care;


Chy