Several prototyping processes can produce a mold or core rapidly without developing a model through stereolithography (SLA), selective laser sintering (SLS) or fused deposition modeling (FDM). One of them is the old-fashioned way-hard work. With the right amount of personnel and equipment, metal patterns can be CNC machined, and a prototype can be poured within two or three weeks. But some shops have developed unique ways to produce a viable, temporary mold for short run pours in even less time.
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