Filler material in 3D printing: definition and types

A fundamental factor for the manufacture of parts and prototypes with a solid structure through 3D printing is the fill patterns.  

Filler not only improves the physical characteristics of the part, but also provides support and great strength in complex structures. 

What is filler in 3D printing and what is it for?

When we talk about filler in 3D printing, we refer to the internal patterns found inside most 3D printed parts.   

Parts manufactured through 3D printing can be manufactured with several structural patterns that partially fill the interior of the part. That is, it is not necessary for the parts to be completely solid or hollow as in other production processes. 

Filler serves to save printing time and, above all, material, as it creates a lattice structure inside a 3D printed part.   

Additionally, filler can be placed strategically to provide strength in the places where it is necessary. 

What types of filler exist in 3D printing?

There are numerous types of filler in the 3D printing, although all have the same objective: the reduction of printing time and material usage.  

The most common types of fillers in the 3D printing processare the following:  

• Linear: it is a filler of multiple parallel lines per layer. What differentiates it from other patterns is that the lines do not cross each other in the same layer, which reinforces the part in two dimensions. Additionally, it is a faster filler compared to triangular or grid patterns.
• Rectangular: provides a strong structure in all directions and is relatively fast, as it performs layers perpendicular to each other. 
• Triangular: it is a pattern suitable for those parts that require more strength, as it presents overlapping triangular lines that provide strength in two dimensions. 
• Concentric: it is one of the fastest fill patterns to print and most economical, as it uses less material. However, due to this, the strength of the part is not as high as in other patterns.
• Grid: it is one of the most common types of filler in 3D printing and is ideal for prints with large and flat surfaces.  

The importance of filler in 3D printed parts

Filler is a critical consideration in 3D printing, as without this feature, some parts cannot be printed due to unsupported surfaces in the design.  

Additionally, filler adds significant strength when needed and achieves savings in both print time and material.  

At Proto&Go!, we provide the best service for the development of your parts and prototypes through additive manufacturing. We specialize in printing via Multi Jet Fusionor MJF, a technology that enables the production of part series in truly short production times without the need for high mold investments.   

Request your quote now through our website!