valuvormi element sisemise õõnsuse või mõne teise keeruka elemendi (väljaulatuv osa, sügav süvend jms), mille valumudeli abil saamine on probleemne, moodustamiseks (vt valand, valumudel), a specially formed component inserted in a mold to shape the inner cavity or other part (protruding part, deep groove etc) of a casting that cannot be shaped as easily by the pattern (see: casting, pattern)