Design for 3D printing - Design with the process in mind

Simon  Brudler

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3D-printet metalpart

Design for 3D printing - Design with the process in mind

Denmark   In Danish
Get your components designed correctly for 3D printing – and avoid costly errors, waste, and unnecessary limitations. 

A component that works in traditional manufacturing is rarely optimal for 3D printing. Without adaptation to the specific printing process, you risk misprints, poor surface quality, unnecessary material consumption, and components that do not live up to mechanical requirements. At the same time, many companies miss out on the design opportunities that additive manufacturing opens up – such as complex geometries, functional integration, and weight reduction. 

Danish Technological Institute offers design consultancy and design optimization for 3D printing. We help you adapt your design to the chosen process – or create it completely from scratch – so you get components that print correctly, perform better, and utilize the full potential of the technology. 

How can Danish Technological Institute help you? 

  • Design adaptation for the printing process: Adaptation of your existing design to match the chosen 3D printing technology's requirements for geometry, support structures, tolerances, and build orientation 
  • Topology optimization: Optimization of component geometry for weight reduction, material reduction, or improved strength – without compromising functional requirements 
  • Functional integration: Redesign that consolidates multiple components into a single part and reduces assembly, joints, and sources of error 
  • Lattice and grid structures: Design of internal structures that provide better strength-to-weight ratios or customized mechanical properties 
  • Orientation and support strategy: Advice on optimal build orientation and support structure to minimize post-processing and material consumption 
  • Digital simulation: Simulation of the printing process to predict deformations, stresses, and potential errors before physical printing takes place 
  • Material-specific design consultancy: Adaptation of design to the chosen material, whether it is polymer, metal, or composite

Why is design for 3D printing a standalone discipline?

Just like conventional manufacturing techniques – such as casting, forging, or machining – additive processes are subject to physical constraints. Based on these constraints, design guidelines and principles can be derived. 

Since the design principles for traditional manufacturing methods are vastly different from those in 3D printing, designers and engineers often find it difficult to free themselves from these constraints and instead "think in 3D". 

Design for Additive Manufacturing (DfAM) is an approach where the component is designed with the specific printing process in mind. In contrast to traditional design, DfAM is not about adhering to limitations – but about exploiting the degrees of freedom that additive manufacturing provides. 

Without a DfAM approach, problems typically arise such as: 

  • Components requiring unnecessarily large amounts of support material and post-processing 
  • Designs that do not account for process-specific limitations such as minimum wall thickness, overhangs, and shrinkage 
  • Failure to utilize opportunities for weight reduction, consolidation, and functional integration

The impact of good design practice 

DfAM is most often associated with ensuring manufacturability. However, the implications of a good design extend far beyond the question of whether a print is completed successfully or not. In fact, the technological and economic viability of entire business concepts can depend on component geometry. 

Well-designed components take the entire manufacturing chain into account – this includes nesting parts within the available build volume, ease of post-processing, and final assembly. In many cases, even minor changes to geometry can result in significantly reduced lead times and lower overall manufacturing costs.

Should we help optimize your design for 3D printing? 

Contact Danish Technological Institute's 3D printing specialist, Simon Brudler, PhD, for a chat about your component and application – together we will assess how the design can be adapted to deliver the best result.

FAQ

What is DfAM – Design for Additive Manufacturing?
DfAM is a design approach where the component is designed specifically for additive manufacturing. Instead of merely adapting an existing design, DfAM is about utilizing the unique opportunities 3D printing offers – such as complex geometries, functional integration, and weight reduction – while respecting the limitations of the process.

Why can't you just 3D print an existing design?
A design developed for injection molding or CNC machining, for example, rarely takes into account the requirements and opportunities that apply to 3D printing. This can result in misprints, poor surface quality, unnecessary support consumption, or components that do not leverage the technology's potential for weight reduction and component consolidation. .

What is topology optimization, and when is it relevant?
Topology optimization is a computational method that optimizes a component's geometry so that material is placed precisely where it contributes to strength and function. It is particularly relevant when there are requirements for weight reduction, material reduction, or improved mechanical performance - and it is one of the disciplines where 3D printing truly sets itself apart from traditional manufacturing.

Which 3D printing technologies can Danish Technological Institute advise on design for?
Danish Technological Institute has design experience with all major AM technologies, including FDM, SLA, SLS, MJF, metal AM, and binder jetting. The advice is tailored to the specific technology your component will be manufactured with, as each process imposes different requirements on geometry, tolerances, and support strategy.

Can Danish Technological Institute help redesign existing components?
Yes. A large part of the design consultancy involves taking existing components and redesigning them for additive manufacturing. This can, for instance, involve consolidating multiple individual parts into a single component, reducing weight through topology optimization, or adapting geometry so the component prints with fewer errors and less post-processing.

What are lattice structures, and what can they be used for?
Lattice structures are internal grid structures that can be designed into a component to achieve a better strength-to-weight ratio, customized stiffness, or energy-absorbing properties, for example. They can only be manufactured via 3D printing and are an example of how DfAM can create components with properties that cannot be achieved with conventional manufacturing.

Can you simulate whether a design will work before it is printed?
Yes. Danish Technological Institute offers digital simulation of the printing process, where deformations, thermal stresses, and potential errors can be predicted before physical printing takes place. This reduces the risk of misprints and saves time and materials during the development process.