What does "infill" refer to in additive manufacturing?

In additive manufacturing, "infill" specifically refers to the internal structure that provides strength and durability to a printed object. This internal design is crucial in determining the object's overall mechanical properties, leading to the desired balance between weight and structural integrity. The infill density and pattern can be adjusted depending on the application, affecting factors such as strength, weight, and the amount of material used.

In traditional manufacturing, a solid object could be made from a single piece, but in additive manufacturing, the process allows for the creation of complex geometries where infill can optimize the material distribution. This means that parts can be lighter yet still maintain sufficient strength for their intended use.

In contrast, other concepts mentioned, such as the speed of the printer's movement or the outer layer of a printed object, do not capture the essence of what infill represents in additive manufacturing. Additionally, while adhesives may be used in certain applications, they are not related to the internal structure meant to enhance strength and durability. Thus, understanding the role of infill is essential for optimizing designs in additive manufacturing processes.