Silicone Mold and Urethane Casting
Purpose: create a flexible tooling to cast multiple functional legos
Embedded Files
Selected a lego and cut 3d printer filament to 3/4" to act as sprues
Sprues were super glued onto the four outer corners and 3 center circles of the lego.
The silicone mold was made using a two component silicone RTV. The two component mixture was a ratio of 100 to 10 of the silicone base and catalyst by weight. Once combined the mixture was placed in a vacuum chamber for 3 minutes and then poured into the mold container.
Pouring silicone into mold container (dixie cup)
Once put together the lego submerged in the silicone mixture was placed in a pressure pot over night to cure.
Cured silicone mold.
removed sprues and lego from mold using an exactoknife.
Mold held together with rubber bands.
Urethane injected into silicone mold through sprue holes.
Injected molds placed into pressure pot.
Cured lego in silicone mold.
Final lego!
the legos stack!
Google Sites
Report abuse