How to Make a Brush-On Mold with Mold Shell [Part I]

Part I of this video tutorial demonstrates how to make a brush-on mold using tin-cured silicone rubber (TinSil® 80-30). 

In Part II, we complete the project with the following:

• mold shell construction (using Poly 1512X polyurethane plastic)

• cutting the mold

• how to make a plastic casting using a rotational casting machine (using EasyFlo 120 polyurethane plastic)

The Steps in Part I of this tutorial:

1. Establish Pour Hole

2. Weigh & Mix Rubber for First Layer of Mold

3. Brush-On First Layer of Mold

4. Weigh, Mix  & Brush-On Second Layer of Mold

5. In the Meantime, Cast Rubber Pieces for Parting Line & Keys

6. Weigh, Mix & Brush-On Third Layer of Rubber

7. Weigh, Mix & Brush-on Final Layer of Rubber

8. Create Thick Parting Line

The Steps in Part II of this tutorial:

9. Construct Mold Shell

10. Remove Mold Shell

11. Cut Parting Line in Mold

The Final Step: Rotational Casting with EasyFlo 120 Polyurethane Plastic

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