Direct digital manufacturing is making fast strides for low-volume applications requiring complex detail, but some significant issues remain. Design engineers require process verification, particularly for high-end parts. For example, the widespread adaption of closed-loop process controls about a dozen years ago provided verification that required process parameters in the injection molding process were being maintained. Direct digital manufacturing systems were originally developed by companies in the rapid prototyping business, where such requirements were not necessary. Parts were simply required for form and fit, and not so much for functional testing. There is often considerable process variation in the new additive fabrication systems being developed for manufacturing directly from digital files. Improvements will come, however, and the new systems are certainly worth a look in several situations, particularly those where there are constant design change orders.
Two new technologies from Stratasys, created in partnership with Boeing, Ford, and Siemens, will bring accurate, repeatable manufacturing of very large thermoplastic end products, and much bigger composite parts, onto the factory floor for industries including automotive and aerospace.
These new 3D-printing technologies and printers include some that are truly boundary-breaking: a sophisticated new sub-$10,000, 10-plus materials bioprinter, the first industrial-strength silicone 3D-printing service, and a clever twist on 3D printing and thermoforming for making high-quality realistic models.
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