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3D Prototyping: An Overview on 3D Prototype Printing

3d prototyping

Published:  May 3, 2022         Reading Time:  About 3 minutes

Traditional prototype creation processes can be very slow and expensive. However, there are new techniques available to improve product development processes. These techniques ensure the fabrication of high-quality prototypes at lower costs. 3D prototyping technology is the perfect solution for your rapid prototyping needs.

3D prototyping gives you access to extensive design possibilities and efficient techniques to save time and money. In addition, it is effective manufacturing suitable for applications in several industries. It also allows you to conceptualize your ideas quickly at a relatively low cost.

What does the 3D printing prototype entail? How can 3D prototyp benefit your product? What are the considerations before starting your project? This article answers all your questions and gives you the information you need to get the best out of your 3D prototyping.

What is 3D Prototyping?

Rapid 3D prototyping is an additive manufacturing process involving creating three-dimensional objects from digital files. In this process, a fabricator creates objects by laying down successive material layers. Each layer is a thin-sliced cross-section of the final object.

rapid prototyping 3d printing

Unlike the traditional subtractive manufacturing process, 3D printing does not involve cutting out pieces of the material. Furthermore, it enables the production of complex shapes with lesser materials. There are three major types of 3D printing, depending on the accuracy levels required. They include the following:

  • Fused Deposition Modeling (FDM). This 3D printing prototyping technique is the most popular and cost-effective option available. It is easy to use and involves thermoplastic filaments with layer-by-layer extrusion. This process is growing rapidly, and it is suitable for product development.
  • Selective Laser Sintering (SLS). This is a 3D printing technique used for both plastic and metal prototyping. It uses powder beds to build prototypes layer after layer, using a laser for heating and sintering the powdered material.
  • Stereolithography (SLA). This method creates a 3D prototyping with a tank of photosensitive liquid resins. Ultraviolet (UV) light then helps solidify each layer of the product. This process continues until the model is complete. It is a recommended solution for high-resolution 3D prototypes.

Rapid prototyping 3D printers are valuable for making products ranging from mechanical parts and architectural models to jewelry designs and other consumer products.

Advantages of Rapid 3D Prototyping

Several industries worldwide are embracing the 3d prototype printing technique due to its several vital advantages over the traditional manufacturing techniques. These advantages include:

Design Flexibility

3D printing enables you to create various iterations of your designs effectively. It gives you more design freedom and flexibility than several other manufacturing techniques. A 3D prototype is created using 3D modeling software. Therefore, the process allows you to easily create your designs, regardless of how simple or intricate they are. It also gives you room to make any prototype from scratch while adjusting your 3D model at any point in the production stage. This helps save headaches while using 3D printing for mass production.

rapid 3d prototyping advantages

Furthermore, any given 3D printer can print almost any product, provided it fits within its build volume. Moreover, the convenience of rapid prototyping 3D printing makes it a great choice for every project. Since you need to make several changes to get the desired final product, you won’t have to create a new mold for every iteration of your project. There is little or no change in the equipment or machinery throughout the process. 

Unlike traditional techniques, 3D printing allows you to include multiple materials into one object. Thus, you have an array of matched mechanical properties, colors, and textures. You’ll also be able to create and manufacture geometries that are impossible for traditional manufacturing methods. Such geometries include parts within parts and hollow cavities in solid parts. You can edit your designs however you like to create unique, quality parts.

Money Saving

3D prototyping is relatively cheaper than other manufacturing methods like injection molding. As we mentioned earlier, you won’t have to create new molds each time you change your design. This is a significant advantage, particularly for small production runs. The 3D printing process requires only one or two machines with few operators to create a component. 

There is usually no need for additional tooling in this process. Thus, 3D printing service cost is usually minimal. In addition, material waste in 3D printing is very low because it is an additive manufacturing process. It involves building a component from the ground up, and there is no carving out of solid blocks as with CNC machining.

Time Saving

One of the most significant advantages of 3D printing technology is that it ensures rapid prototyping. As a result, you can design, develop, and test your custom part in the shortest time possible. Even if you have to modify the design at any point, you can do it without necessarily affecting the manufacturing speed. Unlike the traditional processes, 3D printing techniques allow you to design your part, manufacture it in-house, and test it within a few days or less.

Additive manufacturing also skips the process of creating mold and waiting for tool preparation. This is often a significant difference for small businesses requiring small production runs. You can accelerate product development and get products to market in short lead times. You are also free from the issue of minimum orders.

Functional Prototype Testing 

functional 3d prototype

The wide range of 3D printing materials available today makes it possible to create advanced functional prototypes. These prototypes are the ones you deploy for cost-effective market testing to ensure that they meet your requirements and the needs of your consumers. 

You can easily test a 3D printing prototype and modify the CAD file if you discover any flaws. You get feedback from your potential investors and customers on the physical product without risking large upfront prototyping expenditures. This gives you an overall competitive advantage in your industry.

How to 3D Print Prototypes

The prototype 3D printing process occurs in four essential stages, and they are: 

CAD Design

3d cad model

The starting point of your 3D prototyping project is the development of a CAD design file. You can work with product design firms to develop the 3D software for the extrapolation of the design. There are several file formats available for 3D printing. It is crucial that you first check the file formats supported by the printer. 

Furthermore, you should check for the available programs for designing the files. Some of the common file formats available are:

  • STL
  • OBJ
  • AMF
  • 3MF

Once there is a printable file, you can then go ahead to prepare the file for your 3D printer. Hence, the next stage. 

Digital Pre-Processing

The process of preparing your file for your printer is called slicing. This means that you’re dividing the 3D model into hundreds of layers using slicing software. Once sliced, your file is ready for the printer, and you can feed it in via USB, Wi-Fi, or SD. 

The digital pre-processing stage also involves the choice of materials and parameters. There are several 3D printing materials to choose from based on the desired properties of your final product. Also, you need to define other parameters of the process, including placement and size of the print.

3D Printing Your Prototype

3d printing process

Once you upload the sliced file into the 3D printer, the printing process begins. 3D printers use instructions in the file to dictate the material disposition. The printers then build the part by depositing layers of the 3D printing material. Although they have similar principles, the type of printer you use will determine how the process will be completed. There may also be post-processing finishes like painting and powder brushing after the printing process. 


Once your 3D prototyping is complete, the next step is to inspect the prototype and take it for market testing. This is usually the case for functional prototypes. In-house engineers can inspect the component for flaws and changes. You can also take it out to potential consumers to ensure it meets their needs. If there is a need for changes, there is enough room for it. 

RapidDirect’s 3D Printing Services

rapiddirect 3d printing services

Completing your 3D printing project is always easier when you work with the best prototyping partner. RapidDirect offers you a high-quality and cost-effective 3D printing service that will meet the unique requirements of your project. Our in-house printing factory and technical capabilities cover major 3D printing methods, including FDM, SLS, SLA, and Polyjet. Furthermore, we offer you an extensive array of materials and post-processing options. 

When you upload your CAD files and specify your requirements, our quoting platform generates rapid quotations within two hours. Our abundant manufacturing resources also allow us to offer cost-effective pricing for your project. More importantly, RapidDirect provides fast lead times as fast as three days to allow you to get your product to market in a short time. Upload your design file today!

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Top 4 Considerations Before 3D Prototyping

3D printing gives the best results in prototyping, but you need to consider some factors before diving into a 3D prototyping project. This will help you get the best out of your project. They include: 

3D Printing Materials

As discussed above, you have an extensive range of materials to choose from for your 3D printing projects. The diverse materials offer the opportunity to manipulate the design properties, confer flexibility, transparency, etc., depending on your needs.

3d printed parts from different materials

However, you need to check the following aspects before choosing your material: 

● Price

This is one of the most important considerations for many businesses. You aim at materials that help reduce cost while giving the necessary properties. For instance, you want to start early prototyping stages with plastic before shifting to metal 3D printing. This choice is more cost-effective than using metal throughout. There are several plastic materials to get you an economical solution.

● The Accuracy and Quality of the Material

A 3D printing prototype gives you a perfect overview of what the final product will look like. Therefore, your sim is to create a functional prototype. Consequently, your material choice must align with the complexity of your project. You also need to know the material’s mechanical properties to ensure its suitability for your project.

● Design Guidelines of Material

There are different design guidelines for different materials. While choosing a material, ensure you check that the dimension and geometry align with the material properties. If you have a wall that is too thin for a non-suitable material, the file may not be printable. As a result, the process will be counterproductive. 

Product’s Application

Your product’s application should also be a priority when making your decisions. Suppose you’re designing a prototype that must replicate the aesthetics of the final product. In that case, you should choose a 3D printing technology that offers finer resolution. Otherwise, you may have to budget for post-processing. On the other hand, you should choose a technology that provides excellent tolerances if you need functional prototypes. 

3D Printing Technology

3d printing technology

The various 3D printing technologies have their unique build styles, material properties, and design limitations. The method you choose will determine the adjustments you make to your design, such as offsets and variances. Polyjet allows you to combine hard and flexible materials. It also projects transparency and full colors. 

On the other hand, stereolithography (SLA) builds parts with smooth surface finishes. These processes are the most ideal if aesthetics is a major concern. In contrast, Selective Laser Sintering (SLS) and Fused Deposition Modeling (FDM) are more suitable for functional prototypes. These technologies build durable parts with different materials. Thus, your choice will depend on your project’s requirements. 

File Formats

It is advisable to send your CAD files in the correct format to ensure an excellent build. The .STL file format is the most popular for builds and setups. Although you can convert native CAD files to the .STL format, some issues may arise if you don’t use the native software. The best files have only one shell with no unshared edges. Your file must also indicate the unit of measurement. This will help reduce potential errors. 

Best 3D Materials for Printing Prototypes

While 3D printing is one of the best prototyping methods out there, you need to choose the best materials to get the most out of your project. There are several materials for 3D printing prototypes, and your choice depends on your project’s needs. Here are some of the most used materials for 3d prototype printing.

3d printing materials

Nylon PA12

This is a white plastic material, and it is among the most affordable materials for prototyping. Despite its relatively cheap cost, Nylon PA12 has excellent mechanical properties. It comes from fine polyamide powder, making it perfect for prototyping and production runs. This 3D printing material works best with Selective Laser Sintering (SLS) technology. 

Multi Jet Fusion PA12

This material is a grey plastic, perfect for prototyping and production. The raw version of the Multi Jet Fusion PA12 is the cheapest option on the market. You can easily make changes at low costs. Moreover, using this material gives you abrasion- and scratch-resistant products. This makes them useful for prototype testing. The Multi Jet Fusion PA12 is also stable to weather, UV stabilized, and light stabilized. Therefore, it is a perfect option for testing in outdoor conditions. 

Prototyping Resin

This resin is more suitable for non-functional prototypes, and you don’t want to use it for large production runs. Whenever you wish to manufacture highly detailed components, prototyping resin is a perfect choice. It offers smooth surface finishes, similar to products manufactured with plastic injection molding. This material works best with stereolithography (SLA). 


Fused Deposition Modeling (FDM) is an interesting technique, particularly useful for Polylactic acid (PLA) filaments. PLA is a user-friendly material with high stiffness and strength. It has a low printing temperature and minimal warping, making it one of the easiest 3D printing materials. It is also an inexpensive material, creating reliable parts for many different applications. If aesthetics and fine details are a major concern, PLA should be your go-to material. 


If your 3D printing prototyping project requires a flexible plastic, TPU is the perfect solution. This material has the properties of rubber, including high elasticity and high strength. Therefore, it would fit your prototyping project if you need something flexible. Components from this material are resistant to fatigue and stress, and it is also a great choice for final products.  


Rapid 3D prototyping is an effective manufacturing process for faster and better engineering. It speeds up your workflows and removes bottlenecks of the traditional prototyping cycle. Using 3D printing prototyping saves cost and reduces time to market while offering easier design testing and overall prototyping advantages. Before diving into any 3D printing project, you need to consider the manufacturing partner you will work with.

RapidDirect is your best option for creating high-quality 3D printing prototypes. We provide the best 3D printing technologies, materials, and expertise to help you get the best out of your project. Our manufacturing capabilities will also get your prototype ready in short lead times at affordable prices. Upload your CAD file today, and let’s get started!

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