How does a 3D printer work?
Quick Answer
A 3D printer builds a solid object layer by layer from a digital design, most commonly by melting plastic and depositing it in thin successive layers that fuse and harden into the final shape.
The Full Story
A 3D printer creates physical objects from digital models through a process called additive manufacturing, meaning it adds material layer by layer rather than cutting it away. It starts with a 3D digital design, which software slices into hundreds or thousands of thin horizontal layers. The most common home printers use a method called fused deposition modelling, in which a plastic filament is fed into a heated nozzle that melts it and precisely deposits it, tracing out each layer that quickly cools and hardens before the next is added on top. Other technologies use lasers to harden liquid resin or to fuse powders, allowing finer detail or the use of metals. 3D printing is used to make prototypes, custom parts, medical implants, and even food and buildings, offering rapid, low-waste, and highly customisable production.
Key Facts
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Suggested video title for this topic:
"How 3D Printers Work — Building Objects Layer by Layer"