TERMIUM Plus®

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SHELL-MOULDING [1 record]

Record 1 1998-06-22

English

Subject field(s)
  • Foundry Practice
  • Casting and Patternmaking (Metal Processing)
  • Plastics Manufacturing
CONT

... casting processes that use aggregate molding materials are shell molding, carbon dioxide process ... and plaster molding. In shell molding the aggregate consists of sand 2.5 - 10% thermosetting resin. The metal pattern is heated between 350 and 700°F, and the aggregate is allowed to thermoset around the pattern, forming a thin sand shell. The shell is then cured and removed from the pattern. The shell halves are assembled and sometimes strengthened by a backing.

Key term(s)
  • shell-molding
  • Croning process
  • Croning method

French

Domaine(s)
  • Fonderie
  • Moulage et modelage des métaux
  • Plasturgie
CONT

Apparu en Allemagne à la fin de 1944, le moulage en carapace est aussi appelé «procédé Croning», du nom de son inventeur, et, aux États-Unis, «shell-moulding». Le moule est en sable siliceux aggloméré à la chaleur par des résines phénoliques thermodurcissables (phénol-formol, ou phénol-formol-crésol) formant carapace autour du modèle métallique. La plaque portant le modèle est chauffée à 200 °C pour former un moule-carapace de quelques millimètres d'épaisseur; l'ensemble est ensuite porté à 300 - 400 °C pour polymériser la résine. On peut alors séparer du modèle la carapace durcie. Un moule est constitué de deux carapaces collées.

Spanish

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