Manufacturing Materials

Topic 10 of Engineering Materials

Casting

Pouring liquid metal into a shape to mould it- good for hollow metals

Rolling

Creates similar shapes to extrusion but rolled through

Drawing

Same as Extrusion except tensile stress is applied to decrease surface area

Extrusion

Material pushed through a shaped die to create continuous cross section profiles (bars and beams)

Annealing

heat treatment to increase ductility in brittle materials (steel and copper)

Moulding (Polymers)

Plastic is melted and put in a mould to shape

Extrusion (Polymers)

Injection Moulding

a highly efficient process in which melted plastic is injected into a metal mould (complex shapes)

Blown film Extrusion (Polymers)

Same as regular extrusion however air is blown through to make a bubble for hollow objects