An extrusion is when something is pushed or squeezed out of its container or shape. You can see it happening with melted plastic being forced through a mold.
In everyday life, we often hear about extrusions in food production and manufacturing. Imagine walking into a factory that makes pasta: you might see rows of tubes pushing out long, thin strands of dough - that's an extrusion! This process is also used to make other foods like cheese strings or even 3D-printed snacks.
A manufacturing process where a billet of material is pushed and/or drawn through a die to create a shaped rod, rail or pipe.
