This week’s video is about creating a flexible over-molded polyurethane clear acrylic lid using a four part 3D printed mold.
I start by creating a 3D printed self locking 4 part PLA mold. I laser cut my acrylic with some teeth and holes in the edges for the Polyurethane to bond with. Next I add some release agent to the PLA mold to prevent the urethane from sticking.The acrylic is sandwiched in the mold and then I inject a flexible shore 80A urethane into the mold cavity to create the part.Once the part is cured, some clean up is required and the prototype part is born.
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