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LOW-PRESSURE PERMANENT MOULD CASTING [1 record]

Record 1 2006-07-06

English

Subject field(s)
  • Casting and Patternmaking (Metal Processing)
CONT

Vacuum permanent mould casting is yet another variation of the permanent mould casting. This is similar to the low-pressure permanent mould casting, where a vacuum is used instead of a pressure. Thin wall castings can be made as in the low-pressure permanent mould casting.

OBS

In permanent-mould casting, liquid metal is either poured by gravity (downwards) or pushed upwards with the application of low pressure. These methods reduce emissions from sand binders and minimize sand reclamation and disposal issues.

OBS

One of the most important process parameters in low pressure permanent mould casting (LPPM) is the pressurisation profile.

Key term(s)
  • low-pressure permanent mold casting
  • low pressure permanent mold casting

French

Domaine(s)
  • Moulage et modelage des métaux
CONT

[Avec le] moulage en coquille basse pression, [...] le principe consiste à faire remonter l'alliage liquide vers le moule en appliquant une pression dans le four. Le moule est placé directement sur le four. La faible pression (40 à 60 kPa) est maintenue tout le temps de la solidification.

OBS

Dans le moulage en coquille, le métal liquide remplit le moule sous l'action de la pesanteur (en se dirigeant vers le bas) ou il est poussé vers le haut sous l'action d'une basse pression. Ces méthodes réduisent les émissions des liants ajoutés aux sables et simplifient au maximum la récupération et l'évacuation des sables.

Spanish

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