Casting residue

Metal residue remaining in the shot sleeve during cold-chamber pressure die casting which is ejected upon solidification.

The casting residue thickness or the spread in casting residue thickness is a relevant and important quality criterion in pressure die casting. Therefore, the thickness of the casting residue should be monitored as it can be used to readily detect defects due to uneven or insufficient final compression (porosity), incomplete mold filling as well as springing of the mold (so-called spraying leads to poor dimensional accuracy) and dosage variations which should generally be as low as possible.

  • Fig. 1: Casting residue, too thick and burnt due to plunger lubricant on the left, the right casting residue is fine