valandite tootmine kordkasutusega õhukeseinalistes koorikvormides, mille valmistamisel kasutatakse vormiliiva ja reaktoplaste (vt koorikvorm), a foundry process in which a mold is formed from thermosetting resin-bonded sand mixtures brought in contact with preheated (150 to 260 oC) metal paterns, resulting in a firm shell mold with a cavity