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Various 3D printing processes have been used to fabricate sacrificial patterns replacing wax patterns of investment casting, which significantly reduces the costs and lead times associated with single part or small batch production. Compared to polymer patterns, 3D printed ice patterns are cheaper and cleaner and are easily removed without mold cracking and other issues. In the present study, the hydrocolloid was developed for ice pattern preparation with extrusion 3D printing. The xanthan gum has a perfect thickening effect on hydrocolloids containing starch. When the xanthan gum content is 5%, the hydrocolloid has good self-stable behavior, which ensures extrudates have a minimal spreading effect. After freeze-drying and heating up to 500 °C, the hydrocolloid can be completely lost without residual ash. Article highlights The hydrocolloids with starch and xanthan gum as a gelling agent were developed for preparing ice pattern with extrusion 3D printing. The hydrocolloids with 5% xanthan gum content have good self-stable behavior and smooth extrusion property. The ice pattern can be completely lost when heated above 500 °C.

Investigation of hydrocolloid for ice pattern preparation with extrusion 3D printing