One of the most exciting things MJF unlocks is geometry that no other method can make economically. Internal lattices, complex infills and organic shapes that would be impossible to machine or mould come out of an MJF build with no extra cost, because the process genuinely does not care how complex any given layer happens to be once it is printing.
We use this freedom to lightweight parts through our MJF & SLS printing service, cutting mass while keeping the strength the part actually needs. For anyone working on weight sensitive products, this ability to put material only where it earns its place is a real change in how a part can be designed.
Why complexity is free in MJF
In machining, every extra feature adds time and therefore cost to the part, because each pocket and contour has to be cut from solid stock. In MJF, the machine fuses each layer in one pass regardless of how intricate the pattern within it is, so a part full of internal lattice prints in much the same time as a solid one, and it uses noticeably less material into the bargain.
That neatly flips the usual economics of manufacturing on its head. Complexity becomes a way to save material and weight rather than a cost to be avoided, which opens up designs that would never make sense with a mould or a cutting tool, including hollow shells braced internally by a fine lattice.
How lattices save weight
A solid part is very rarely loaded evenly throughout its volume, which means much of the material inside it is just dead weight doing nothing useful. Lattices let you put material only where it is genuinely needed, replacing that dead weight with an open structure that still carries the load. The result can be dramatically lighter while staying stiff enough for the job.
This matters most where weight is critical to performance or cost, such as drones, robotics, aerospace components and portable equipment that gets carried around all day. Shaving grams in the right places adds up to a meaningful difference in battery life, payload or simple comfort across those applications.
Where lightweighting pays off
Lattice and lightweighting techniques suit a range of demanding parts where every gram or every dollar of material counts. The approach works best where the loads are well understood and the savings clearly justify the extra design effort that a good lattice takes.
- Drone and robotics components where mass counts.
- Brackets that can shed weight without losing strength.
- Padding and energy absorbing lattice structures.
- Parts where material cost is a major factor.
Types of lattice to consider
Not all lattices behave the same way, and choosing the right one matters as much as deciding to use one at all. Regular strut based lattices are simple and predictable, gyroid and other surface lattices spread load smoothly and resist buckling well, while graded lattices vary their density so material concentrates exactly where the stress is highest.
Energy absorbing lattices, which crush in a controlled way, suit padding and impact protection, whereas stiffer cells suit structural panels. Matching the cell type, size and wall thickness to the load case is where the real weight savings come from, and it is worth a quick analysis before printing. It also pays to keep the cell size sensible relative to the wall thickness, since a lattice that is too fine can trap powder and prove hard to clean, while one that is too coarse may telegraph through a thin outer skin.
Designing your lattice
Generating an effective lattice takes the right software and a clear understanding of the loads the part will face in service. Our CAD team can help create or optimise the structure for your application and confirm it will clear powder properly. Send your goals through a quote and we will build a lighter part that still performs exactly as it must.