There is an increasing interest in additive manufacturing and 3D printing and the application to foundry tooling. Typical additive manufacturing methods applied to foundry patterns have been limited to the size of build volumes of the printers. With larger printers now available, new opportunities for larger additively manufactured components are available. Patterns for large no-bake patterns have traditionally used wood as a material for making cavity impressions. This has posed challenges to producing consistent castings, as wood will swell and shrink under different levels of temperature and humidity, leading to a phenomenon of dimensional seasonality. As polymers are typically more resistant to these effects; they have been used by patternmakers for some time, however urethanes have been typically limited to small and medium sized work. There are challenges to using non-traditional materials for large no-bake pattern impressions, but thee are able to be overcome with careful planning and implementation.
This AFS Members Only Webinar will begin at 1 p.m. CT.