Extrusion
Also called profile
A length of frame material made by pushing it through a shaped die.
An extrusion is formed by forcing softened material through a die, the way toothpaste leaves a tube. It has the same cross-section along its whole length, and that cross-section can be as intricate as the die: hollows, grooves for gaskets, and legs for a bead to snap onto are all formed at once.
Vinyl and aluminum windows are both made this way. The extrusions are cut to length and joined at the corners to make sashes and frames.
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Related
- ChamberOne of the hollow cells inside a vinyl extrusion.
- PultrusionA length of fiberglass made by pulling resin-soaked glass fibers through a heated die.
- Vinyl windowA window built from hollow extrusions of rigid PVC.
- Aluminum windowA window built from thin-walled aluminum extrusions.