Pultrusion

Part of speech: noun

Definitions

1. A process utilized in manufacturing whereby composite materials, consisting of resin and fibers, are continuously drawn through a heated die to form specific profiles with consistent cross-sections
2. This technique allows for the creation of strong, lightweight composite shapes by pulling materials through a heated mold, ensuring uniformity and desirable mechanical properties
3. A specialized manufacturing method involves drawing reinforced materials through a heated die to achieve continuous shapes with precise cross-sections and enhanced strength

Etymology: "Pultrusion" is a blend of "pull" and "extrusion." Extrusion is the familiar process of forcing material through a shaped die, as when toothpaste comes out of a tube or pasta is pressed into shape. The new word swaps that push for a pull: reinforcing fibres such as glass or carbon are drawn through a resin bath and then through a heated die, which shapes and cures the composite into a continuous profile of constant cross-section. The blend works because it describes the process in two halves. The "pull" part names the mechanical action that sets the material moving, while the "extrusion" part keeps the link to the older shaping technique it resembles. Blends of this kind are typically coined when a process needs a name that is quicker than a full description, and the word has stayed a technical term used mainly in manufacturing and materials engineering.