3D Printing — Technology Wiki

Overview

Direct Answer

Additive manufacturing is a process that constructs solid three-dimensional objects by successively depositing material—such as plastic, metal, resin, or powder—in layers according to digital designs. Unlike subtractive methods that remove material, this technology builds from the ground up, enabling rapid fabrication of complex geometries directly from Computer-Aided Design (CAD) files.

How It Works

A digital model is sliced into thin horizontal cross-sections. The manufacturing system deposits material layer by layer, typically between 0.1 and 0.3 millimetres in thickness, hardening or fusing each layer before proceeding to the next. Hardening mechanisms vary by technology—thermal curing, photopolymerisation, sintering, or extrusion—depending on the material and equipment type used.

Why It Matters

Organisations use additive manufacturing to reduce lead times for prototyping and tooling, minimise material waste compared to conventional machining, and produce bespoke components without expensive moulds or dies. Industries including aerospace, healthcare, automotive, and consumer goods recognise significant cost and speed advantages, particularly for low-volume or customised production runs.

Common Applications

Applications span rapid prototyping in product development, manufacturing of patient-specific surgical implants and dental prosthetics, production of lightweight aerospace brackets and engine components, and fabrication of replacement parts for legacy equipment where traditional production is uneconomical.

Key Considerations

Material properties, surface finish, and dimensional accuracy often remain inferior to conventional manufacturing, requiring post-processing and quality assurance. Production speed and equipment costs remain prohibitive for high-volume commodity manufacturing, limiting adoption to specialised or low-throughput applications.

Referenced By1 term mentions 3D Printing

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4D Printing·Emerging Technologies

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