To cast multiple prop guns, PMC® 121-30 is an excellent mold rubber choice. The material is low shrinkage, easy to use (1:1 by volume mix ratio), and self de-airing. This application illustrates a cavity pour mold with a gypsum support shell. Ease Release® 200 is sprayed into the mold before the pigmented Smooth-Cast® 325 is cast.
Materials Used in this Tutorial
Ease Release® 200
Gypsum Support Shell
Step 1: Prop Gun Mold With Legs
In the picture below the mold is closed. Notice the legs used to hold the mold in a pouring position.
Step 2: Inside Of The PMC Mold
Here you can see the opened mold. One half of the rubber has been pigmented darker.
Step 3: The Original Model And Mold
The original model and opened mold.
Step 4: Side One Of The Mold
Notice the small rod, used to create a hollow gun barrel.
Step 5: Side Two Of The Mold
The surface detail captured is perfect.
Step 6: Casting
The resultant castings reflect perfect detail as well.