soojustatud valuplokivormi osa valuploki sulametalliga toitmiseks tardumisel välistamaks kahanemisega seotud defektide moodustumist (vt valuplokivorm), a reservoir, thermally insulated or heated, that holds molten metal on top of an ingot mold for feeding of the ingot as it contracts on solidifying, thus preventing the formation of casting defects such as pipe or voids (see: ingot mold)