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In order to develop a product successfully, most product designers create prototypes for testing. Although porototyping is crucial for product development, a typical prototyping process can take weeks or even months to complete depending on the method used and complexity of the product.
In this matter, rapid prototyping is utilised. Rapid prototyping is faster and a more cost-effective method compared with conventional prototyping. To learn more about rapid prototyping, here is a blog discussing how it works.
Technically speaking, rapid prototyping (RP) is a group of techniques used to fabricate a model quicker than the normal prototyping process. It enables engineers to shorten a design and development cycle. It has also been referred to as solid free-form manufacturing, layered manufacturing, and computer automated manufacturing.
Rapid prototyping technology is classified as an additive process. Based on 3D model data, materials are combined layer upon layer to produce an object. The materials used for this process are photopolymer, thermoplastic, and adhesives.
Rapid prototyping is being utilised in most industries, and its benefits are widely known.
Benefits of Rapid Prototyping
With todays advanced technology, rapid prototyping can provide immense benefits to:
There are 4 primary areas for the development of rapid prototyping:
Input refers to describing the physical object with 3D data. Its starting point can be a computer model or physical model.
A computer model is created by a CAD system while the physical model requires data acquisition through "reverse engineering".
The method that is employed by each RP business is classified into different categories:
The initial state of the prototype material can be either in solid state, liquid state or powder state. It can also be in the range of paper, nylon, wax resins ceramics and metals.
Rapid prototyping applications can be grouped into design, engineering, analysis and planning, tooling and manufacturing. Rapid prototyping can also benefit various industries such as in aerospace, automotive, biomedical, electrical products, etc.
3D printing is a process of making three-dimensional solid objects from a digital file. This is achieved using an additive process. Additive process is done by laying down successive layers of material until a final product is created. 3D printing enables you to produce complex shapes using fewer materials. Below are some experimental RP methodologies that are used nowadays.
Fused Deposition Modelling is a process used to construct the product directly from 3D CAD data. This process involves binding thermoplastic material layer by layer.
Thin laminates such as paper, plastic sheet or metal foil are laid out to build a platform. A computer controlled cutting device traces out the patterns and crops off excess materials.
Stereolithography is based on a selective polymerisation of a photosensitive resin. Basically, a thin layer of liquid plastic (polymer) is exposed on a perforated platform. An ultraviolet (UV) laser beam is then focused on the top layer of the platform and prints the pattern of the product.
Stereolithography is the first rapid prototyping technique. Apart from that, it is the most widely used method today. It is also an inexpensive procedure since it uses light-sensitive liquid polymer.
A high-powered laser beam melts and fuses powdered material that is spread on a layer. Furthermore, the powdered material is measured in accurate amounts and spread by a rotating roller table.
All rapid prototyping techniques undergo these basic steps:
In this step, the object (to be built) is formed using a CAD software package. Designers and engineers utilise 3D objects because it is more accurate than wire-framed models such as AutoCAD. CAD model creation also yields to better results.
In order to establish consistency, STL format has been adopted as a standard format in rapid prototyping. The STL format represents a 3-dimensional surface geometry without any representation of texture, colour or other CAD attributes.
The 3rd step, a pre-process database prepares the STL file to be sliced. The database slices the STL model into layers from 0.01mm to 0.7mm thick depending on the build technique and accuracy required.
After the first layer of the physical model is done, the rapid prototyping machine builds another layer on top of the first layer. This process is repeated until the model is completed. Most of the machines used are autonomous and only require low level of human intervention. However, supportive structures and experience is required to stop distortion.
For post-processing, the prototype is removed from the machine. Any supports that are in the product are also detached. Moreover, prototypes may require cleaning and surface treatment such as sanding, sealing or painting to improve appearance and durability.
You are now educated about how rapid prototyping works. By using rapid prototyping, product designers and engineers can quickly produce a prototype for use while comsumers can make idea come true a lot easier than before.
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Rapid prototyping is the group of techniques used to quickly fabricate a physical part or assembly from a three-dimensional design. With rapid prototyping, engineers and designers can create a better final product, iterating several times between digital designs and physical prototypes with a quick and cost-effective workflow.
With rapid prototyping tools such as Formlabs 3D printers, anyone can turn ideas into realistic proofs of concept, and advance these concepts to high-fidelity prototypes that actually look and work like final products. Best of all, 3D printed prototypes are cost-effective, enabling teams to create dozens of affordable prototypes with a quick turnaround.
In this guide, we'll showcase real-life examples of rapid prototypes from leading companies and youll learn the fundamentals of rapid prototyping, its applications, and how 3D printing can help you develop prototypes quickly and cost-effectively.
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Prototyping is a crucial part of the product development process, but traditionally, it has been a bottleneck.
Product designers and engineers would create makeshift proof-of-concept models with basic tools, but producing functional prototypes and production-quality parts often required the same processes as finished products. Traditional manufacturing processes like injection molding require costly tooling and setup, which makes low-volume, custom prototypes prohibitively expensive.
On the other hand, rapid prototyping helps companies quickly turn ideas into realistic proofs of concept, advances these concepts to high-fidelity prototypes that look and work like final products, and guides products through a series of validation stages toward mass production.
With rapid prototyping, designers and engineers can create prototypes directly from digital models created in CAD software faster than ever before, and execute quick and frequent revisions of their designs based on real world testing and feedback.
A rapid prototype of a robot arm produced with 3D printing (left) and the final end-use assembly (right).
As rapid prototypes are usually constructed using additive fabrication techniques as opposed to traditional subtractive methods, the phrase has become synonymous with additive manufacturing and 3D printing.
3D printing is a natural match for prototyping products. It provides almost unlimited form freedom, doesnt require tooling, and can produce parts with mechanical properties closely matching various materials made with traditional manufacturing methods. 3D printing technologies have been around since the s, but their high cost and complexity mostly limited use to large corporations, or forced smaller companies to outsource production to specialized services, waiting weeks between subsequent iterations.
Using 3D printing, designers can rapidly iterate between digital designs and physical prototypes, and get to production faster.
The advent of desktop and benchtop 3D printing has changed this status quo and inspired a groundswell of adoption that shows no sign of stopping. With in-house 3D printing, engineers and designers can quickly iterate between digital designs and physical prototypes. It is now possible to create prototypes within a day and carry out multiple iterations of design, size, shape, or assembly based on results of real-life testing and analysis. Ultimately, the rapid prototyping process helps companies get better products to market faster than their competition.
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