Rapid Prototyping: Accelerating Design Development
Definition
Rapid Prototyping
Rapid prototyping is the use of 3D printing and other additive techniques to quickly create physical models from CAD designs, allowing fast testing and feedback.
- It is often referred too as 3D printing, especially in schools and industry, but technically, 3D printing is just one part of rapid prototyping.
- Rapid prototyping focuses on speed, iteration, and development, not just the printing itself.
- All 3D printing methods (FDM, SLS and SLA) can be used for rapid prototyping, depending on the detail, speed, and material needed.
Why Designers Use Rapid Prototyping
- Produces prototypes quickly from CAD
- Enables frequent iteration and fast feedback
- Ideal for complex or customised designs
- No tooling or moulds required
Key Rapid Prototyping Techniques
Stereolithography (SLA)
- Stereolithography (SLA) uses a laser to cure liquid resin into solid layers, building a 3D model.
- Produces very high-detail and smooth surface finishes, ideal for aesthetic models.
- Commonly used for small, intricate parts like dental models, jewellery, or concept casings.
- Requires post-processing, such as washing and UV curing, after printing.
| Advantages | Disadvantages |
|---|---|
| High precision and detail | Weaker mechanical properties - more brittle than FDM or SLS |
| Wide range of resins available | Post-processing required - messy and time-consuming |
| Excellent surface finish | Higher cost per part - maintenance and resin is expensive |
