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Molding and Casting: What is The Difference?

The difference between Molding and Casting, two important steps in metalworking and other manufacturing processes, can be difficult to discern for those new to these areas. They are both used in a variety of everyday products – from your automobile to the toothbrush you brush your teeth with – and each is used for different purposes.

There are quite a few similarities between Molding and Casting. So let’s take a look at what the differences are between the two.

Molding and Casting:

Molding is the process of shaping an object by using heat and pressure (useful for reposing objects). It is the process in which a material is forced into a shape. 

Molding is a flexible word that is used in different areas. A mold is created in many shapes, styles, and sizes. Solutions are poured into these molds which are then hardened or frozen in order to produce a pattern or an object with repeatable dimensions.

Meanwhile casting is the process of pouring liquid or molten material into a mold (i.e. metal). It is the process in which molten metal, plastic, glass, or other materials are poured into a mold.

The molds are generally made of sand, silica sands, ceramic sands, refractory materials (including alumina), or metals like alloy steel casting. Like in the molding process above, after the molten metal cools and hardens it will be removed from the mold cavity.

The Takeaway:

Molding is the process of creating a duplicate shape or replica by surrounding it with an already-solidified material. Casting is the act of forcing molten material into an already-created mold cavity, which can take several forms.

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