3D printing parts: how to know if a part is suitable for additive manufacturing
Industrial 3D printing is no longer a technology reserved for prototypes. Today, more and more companies are using it to manufacture functional parts, spare parts, jigs and fixtures, bespoke components or short runs, with excellent results. However, not all parts suitable for 3D printing are the same, nor are they all good candidates for additive manufacturing. Before choosing this technology, it is worth analysing several factors that will determine whether it really is the best option compared to other manufacturing processes such as machining or injection moulding. In this guide, we explain the main factors you should assess before manufacturing a part using 3D printing and how to determine whether your project can benefit from this technology. 1. What function will the part fulfil? The first step is to understand the part’s actual intended use. Manufacturing an aesthetic housing is not the same as producing a structural support, a production tool or a component subjected to continuous mechanical stress. The function dictates virtually all subsequent decisions: the material, the printing technology, the tolerances and even the surface finish. Therefore, before considering 3D printing, it is worth answering a very simple question: What does this part actually need to do? 2. What mechanical stresses will it have to withstand? One of the most common mistakes is to focus solely on the shape of the part and overlook the operating conditions. Before manufacturing a part for 3D printing, it is essential to analyse whether it will be subjected to: Depending on these conditions, it will be necessary to select both the most suitable technology and material. For example, materials such as PA12 S, Nylon 12 CF or PAHT CF offer excellent performance when mechanical strength and dimensional stability are the priority. 3. In what environment will it be used? The environment in which the part will operate is just as important as its design. A component used in an office is not the same as one installed in an industrial unit or exposed to the elements all year round. It is important to consider aspects such as: Each material responds differently to these conditions. For example, ASA CF is an excellent choice for outdoor parts thanks to its resistance to UV rays and weathering, whilst materials such as PAHT CF are particularly suitable for applications subjected to high temperatures. 4. Is the geometry suitable for 3D printing? Indeed, one of the greatest advantages of additive manufacturing is its ability to produce complex geometries. Internal channels, weight-saving features, organic shapes or components that previously required multiple manufacturing processes can now be produced as a single part. However, not all geometries offer advantages through 3D printing. If the part is very simple, requires thousands of units and can be easily manufactured using other processes, there are likely to be more competitive alternatives. 3D printing offers greater value when design complexity, customisation or flexibility are key factors. 5. What level of precision do you need? Each 3D printing technology offers different characteristics. That is why it is important to know the tolerances required for the part before deciding how to manufacture it. Depending on the application, technologies such as the following may be used: Choosing the right technology is just as important as selecting the material. 6. How many parts do you need to manufacture? Production volume is another decisive factor. 3D printing is particularly cost-effective for: Conversely, when large production volumes are required, other processes such as plastic injection moulding may be more competitive. Analysing the number of units from the outset allows you to choose the most efficient manufacturing process. Choosing the right material makes all the difference The same part can be manufactured using very different materials, yielding completely different results. Therefore, the material should never be chosen solely on the basis of its name or price. The important thing is to understand what the part requires and select the material that best meets those requirements. There are now specific materials available for virtually any application: choosing the right material increases the part’s service life and reduces the need for future modifications. Common mistakes when designing parts for 3D printing Many projects fail not because of the 3D printing itself, but because of incorrect decisions made during the design phase. Some of the most common mistakes are: Avoiding these mistakes from the outset saves time, costs and the need for future modifications. Checklist: Is your part suitable for 3D printing? Before starting a project, go through this list: If the answer to most of these questions is ‘yes’, it is very likely that 3D printing is an excellent solution for manufacturing your part. Do you need to manufacture a part using 3D printing? Every project has different requirements, and additive manufacturing is not always the best solution. At Additium3D, we analyse the geometry, material, production volume and actual conditions of use for each part to recommend the most suitable manufacturing technology. If you’re unsure whether a part can be manufactured using 3D printing, our technical team will advise you on finding the solution that best suits your project.
