Molding and Casting

Goals

• Design a 3D mould around the stock and tooling that you'll be using, machine it, and use it to cast parts.

3D CAD

I decided to build a star shaped mold for the molding week. I designed a simple mold using fusion 360

After the model was milled using Roland modela machine and Wax.

Initially we used i/8 end mill to do initital milling and 1/8 flat mill to do finish cut.

I used silicon resin to create my mold. Silicon resin has two parts.

Next step is to mix the Part A and Part B of the solution to create the mold resin. They are mixed in 1:1 propotion.

Resulting solution is mixed well and poured it slowly to the mold and let it to form mold.

I

Casting

Next is the Casting Part. I used liquid plastic to cast my mold. It is similiar to silion resin as mixing ratio of part A and Part B is 1:1.

After a few minutes, i checked the mold to get my product.It was difficult to take it out and was imperfect because i over poured the mold.

Problems faced

After milling of the mold was finished i found out that since the flat bit was smaller than space between the wall and the body it was merged with the machine.

it was problematic to brake away the mold because of the overflowing of the casting material.