What are living hinges?
A living hinge is a flexible feature of a plastic part which allows movement of two segments of the part. It can be used for example to enable the closing of a lid.
In 3D printing the most important factors for achieving a good result for living hinges are:
- choice of technology and material
- design of the hinge and
- the printing orientation
Design recommendations per material
Material and technology |
Dimensions |
Design |
Polyamide (SLS) |
Thickness: 0.4 - 1mm
Length: 6 mm
|
- Design the hinge of the 3D part in a flat, uncurved position to minimize stretching forces during use.
- Add a comment during ordering and ask for the best possible building orientation.
|
| Polypropylene (SLS) |
Thickness: 0.4* - 1 mm
Length: 6 mm |
- Design the hinge of the 3D part in a flat, uncurved position to minimize stretching forces during use.
- Add a comment during ordering and ask for the best possible building orientation.
*For wall thicknesses between 0.4 - 0.8 mm the flat position and building orientation of the hinge are mandatory. In Polypropylene all structures with thicknesses under 0.8 mm can physically only be built correctly when they are designed flat and orientated well. |
Polyamide (MJF) |
Thickness: 0.5 mm
Length: 6 mm (max 25 mm)
|
- Design the hinge of the 3D part in a flat, uncurved position to minimize stretching forces during use.
- Add a comment during ordering and ask for the best possible building orientation.
|
Tip for first use after print
Before the first use, the hinge should be submerged in warm water and bent carefully, this will enable the best possible durability of the hinge.