| Term | sprue former |
| Variations | crucible former, sprue base |
| Definition | A conical or cylindrical plastic or metal base which holds the sprues upright in the casting ring during investing. It forms a funnel in the investment to guide the molten material into the mold during casting. |
© 2026 Productivity Training Corporation. All rights reserved.
Try our hands-on seminars in waxing, in ceramics, or dentures.