Sand Casting
Pouring molten metal into a prepared cavity in a sand mould and allowing it to solidify.
Steel and aluminium are most commonly used in this process.
Ideally suited to manufacture a one off product.
Advantages - Cheap , easy, Hardly any waste and all waste metal can be recast. Even the sand can be reused.
Investment Casting
Create a mould, fill it with sand. Place wax mould of whatever you want too make out of metal into the sand. Pour molten metal through the hole and set.
Wax will dissapear and all impurities will remove themselves through the bottom air hole.
You will then achieve a perfect model of what your wax mould was.
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