How To Make Plastic Sheet Molds

Lay the sheets over the mold and up the retaining walls.

How to make plastic sheet molds.

Recycling plastic for making the molds for the concrete would make good use of what would otherwise be pollution. Remove the excess water by squeezing the sheets over the bowl. Once your part is formed it has to be shaped. I want to make molds for pouring concrete into.

Each sheet should be 6 inches longer than the mold. Cover a flat area with plastic trash bags to avoid mess and spray the plastic with a mold release agent. Get the right mold material. Cool plastic is hard plastic.

The plastic i have melted so far has set a bit too rigid for casting anything with undercuts. Have a mold ready to use. The sheets should be wet not dripping with water. Layer the sheets on top of eachother.

As you ll need to put the plastic sheet into the oven this is your size limitation. On the first day prepare your template object and work space. You need to create your mold with a material called rtv room temperature vulcanizing slicone rubber. The first thing you need to have for creating a plastic part is a mold.

Does anyone have knowledge of melting plastic and retaining its pliability. Make adjustments appropriate to the specifications of your project. The best part of rtv is it comes in the form of liquid until you add the required catalyst. Releasing the mold from the plastic before it fully cools within 2 3 minutes of forming is also a good idea.

Build a molding box a frame that holds the mold in place that is bigger than the size of your template object. The mold is a female replica of your original part.