Design Guide-Nylon

The nylon model is composed of white, very fine powder particles. The product has high strength and certain flexibility, and can withstand small impact forces and resist slight bending. The surface of the model has a frosted, granular appearance with slight permeability. At present, Qile has multiple SLS3D printers, and the printing materials are mainly nylon PA and nylon plus glass fiber PA+GF.

1. Design specifications

Recommended wall thickness: 1mm or more (related to 3D model size)

Minimum details: 0.4mm

Accuracy: 0.15mm

Clearance: 0.5mm

2. Basic principles, suggestions and strategies

1) Wall thickness

For 3D printing, the wall thickness refers to the distance between one surface of the model and its corresponding surface. The wall thickness will either make your wall firm and strong, or be flexible and deformable. In order to ensure the quality of the model, we recommend that the wall thickness is at least 1mm, otherwise the model is prone to the phenomenon of holes and holes when printing.

2) Model shelling

Model shelling is to turn a solid model into a hollow model with a certain wall thickness. If possible, shell the model as much as possible, which will avoid deformation and stains during the printing process and also save printing costs. We recommend that you make two small holes in the model, it is easy to pour out the unsintered powder after printing. Imagine that the powder is flowing, find the most suitable location to design small holes that bleed out excess material.

3) Large planes can cause warpage

Printing a large flat structure is a difficult idea, and in most cases the model will deform. This process is called "warpage". Even if you add ribs to the bottom of the plane, slow down the printing speed, and extend the cooling time, it will not solve this problem. The key is to avoid large planar structures during design.

4) Clearance between moving parts

When you design the interlocking structure, the gap between the product surfaces is very critical, it will affect the flexibility and bending performance of the product. We suggest that the minimum gap of the model surface should be 0.5mm. If you can allow a larger gap, the gap between the rings is closely related to the size of your design. You can leave a large gap for the big ring, and you can print more products in the limited space. For small rings, you must limit the space to ensure the horizontal and vertical distance between the rings.

5) Assembly

When designing a model that requires assembly, it is important to maintain sufficient clearance for the connected parts. The perfect assembly on the software does not mean that the actual product is the same, because the software does not consider the friction in the real world, and the situation of thermal expansion and contraction. Therefore, combining different parts with their use environment, there is at least 0.6mm distance between the parts, making assembly easier.

6) Bumpy details

For concave text or surface details, we recommend that the text line width is at least 1mm, depth 1.5mm, and overall height at least 4.5mm. The raised text or surface details should have sufficient strength so as not to be damaged during printing or transportation. We recommend that the text line width is at least 0.8mm, the overall height is at least 3mmm, and the bulge height is at least 0.8mm.