The workpiece represents the overall volume of the mold components that directly participate in shaping the molten material (for example, the top and bottom inserts together). The workpiece can be an assembly of A & B plates with inserts or simply an insert that is split into multiple components. The workpiece can have standard overall dimensions to fit in the standard base, or it can be custom-made to accommodate the geometry of the design model. The die block represents the overall volume of the cast components that shape the molten material: the top half and bottom half of the die.

If the workpiece or die block is a pre-existing part, you can add it to the mold or cast assembly, or, you can create the workpiece or die block directly in the mold or cast assembly. If you create a workpiece or die block in the mold or cast assembly, the workpiece or die block automatically uses the same accuracy as the reference model.