Glossary A-CC-CD-EF-GG-II-MN-PP-SS-SS-TT-VW Checking fine cracks on the surface of a die which produce corresponding raised veins on die castings. Caused by repeated heating and cooling of the die surface by injection molten alloys. Cold chamber machine a type of die casting machine in which the metal injection mechanism is not submerged in molten metal. Combination die a die having two or more cavities, each producing a different part (see multiple cavity die). Core pin a pin, usually of circular section, which has some taper (draft), used to form a hole in the die casting. Creep the plastic deformation of metals held for long periods under stresses less than the normal yield strength.