Is a bigger bed size always better in Additive Manufacturing?

10 October, 2024

Alternative approaches to productivity

There are other ways to boost productivity in AM that do not involve increasing bed size. Technologies that increase laser-on time, improve machine turnaround, and streamline powder handling can all contribute to greater efficiency.

For instance, integrating powder handling processes like sieving directly into the machine can reduce the time spent removing unmelted powder for recirculation. Additionally, some manufacturers are incorporating vacuum processes that allow the machine to start processing more quickly by removing oxygen faster, thereby reducing the need for consumables like argon gas.

One of the most significant challenges in improving laser-on time in laser powder bed fusion machines has been recoating time. Traditionally, the laser stops firing during the recoating process, which can slow down the build. Recoating times of around nine to eleven seconds per layer can add up to tens of hours over the course of a build that involves thousands of layers.

By making AM systems faster and more efficient, manufacturers can reduce the cost per part and increase production output — without necessarily requiring a larger machine. For businesses considering whether to invest in machines with larger bed sizes, it is essential to weigh up the specific demands of their application, the risks involved, and the overall impact on productivity and ROI.

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