How do manufacturers decide between CNC machining, 3D printing, and injection molding for prototypes?
I’m trying to understand how manufacturers choose the most practical process when moving from an early prototype toward production.
For a small plastic or metal part, what factors usually matter most when comparing CNC machining, 3D printing, and injection molding?
I’m especially interested in how teams balance:
prototype quantity
material requirements
tolerance and surface finish


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