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Update molding urethane authored by Jonathan Barés's avatar Jonathan Barés
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molding-urethane.md
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......@@ -14,10 +14,11 @@ Making a backing mold for the mold of the sample
The backing mold is nothing but the positive of your sample. You need it to cast the silicon mold that you will use to cast the urethane. Unfortunately, the urethane strongly sticks to almost everything (but the silicone we will use) so you definitely need this silicone mold. This means you need its backing mold. You cannot directly machine the urethane mold.
You have different way to make this backing mold. The simplest is to glue something that have the same shape as your final sample in the bottom of a cup but just like in the examples below, you can also 3D print it of machine it:
![1CounterMold_2](/uploads/e6b397cc5df24b5deeb69cb397a02bcf/1CounterMold_2.JPG =100x)
![2CounterMold_3](/uploads/d4fce3c40acea6200d16d8af68e0bebe/2CounterMold_3.JPG =100x)
You have different way to make this backing mold. The simplest is to glue something that have the same shape as your final sample in the bottom of a cup but just like in the examples below, you can also 3D print it of machine it
* 3D printed small cylinders backing mold:
![1CounterMold_2](/uploads/e6b397cc5df24b5deeb69cb397a02bcf/1CounterMold_2.JPG)
* Machined diabolo-shaped particle backing mold:
![2CounterMold_3](/uploads/d4fce3c40acea6200d16d8af68e0bebe/2CounterMold_3.JPG)
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