How To Make Plastic Sheet Molds

Once your part is formed it has to be shaped.

How to make plastic sheet molds.

Does anyone have knowledge of melting plastic and retaining its pliability. Measure the inside of your oven. Make adjustments appropriate to the specifications of your project. As you ll need to put the plastic sheet into the oven this is your size limitation.

The plastic i have melted so far has set a bit too rigid for casting anything with undercuts. I want to make molds for pouring concrete into. Remove the excess water by squeezing the sheets over the bowl. Dip the sheets in bowl filled with room temperature water for 1 second.

The mold is a female replica of your original part. Get the right mold material. 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.

Cover a flat area with plastic trash bags to avoid mess and spray the plastic with a mold release agent. Releasing the mold from the plastic before it fully cools within 2 3 minutes of forming is also a good idea. The first thing you need to have for creating a plastic part is a mold. Lay the sheets over the mold and up the retaining walls.

The best part of rtv is it comes in the form of liquid until you add the required catalyst. The example here is the outside of a mold but it can work inside too. Have a mold ready to use. Build a molding box a frame that holds the mold in place that is bigger than the size of your template object.

Cool plastic is hard plastic. Recycling plastic for making the molds for the concrete would make good use of what would otherwise be pollution.