Building a Portal Turret with motion controlled audio and lighting

Step 6 Making the Molds - Legs

On to the legs. Since all these pieces are much smaller, Using a block mold is going to be much quicker and easier to do. This will also use a minimal amount of extra rubber.

These are poured in halves like the body to create two pieces for each mold.  After cutting the foam core down to shape to make a box around each piece, I decided where I wanted the seam from the mold to be and used the oil based clay to set up the first half of the mold.  You can see the clay under the long leg piece.  Then its as simple as just pouring in the rubber until it covers the entire surface.  Once its cured, you flip it over, remove the clay and pour the other half.  It is important to use a mold release agent to prevent the two halves of the mold from sticking together.  I forgot to do this on one piece and had to cut the thing back apart with an exact o blade.

The holes you see in the picture of the open molds are spots for the connection point with the body and legs. From here on out, all the pieces that are created will be part of the final turret which is pretty exciting! Its time to start casting pieces.



Materials used for this stage
Foamcore
oil based clay
Smooth-on Rebound 25 silicone rubber
Mold release agent