Maker News Workshop
How To “Over-Mold” Clear Parts

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.

Eric Strebel

My name is Eric Strebel, I am an Industrial Designer and run Botzen Design Inc., a product design and development company focusing on handheld and table top consumer products. I design products for global partners from initial concept to mass production, including hand drawn ideation concept sketches, mock-ups, prototypes, as well as CAD and pre production samples. I bring dreams to life and I also document and preserve my craft & process on my Design and Making YouTube channel .

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