ABSTRACT
In the foundry industry, molds and dies are the media that achieve the forming action of liquid metals. These processes are conducted either with permanent molds, therefore reusable (pressure casting, gravity dies) or with elements constituting non-permanent molds (pattern plates, core boxes, templates and models). This article firstly describes the composition and then the design process of foundry tooling. The latter section begins with an analysis of the molding procedure and concentrates on the criteria that must be taken into account. The characteristics associated with pressure casting, such as the squeeze-casting and gravity casting processes are also detailed.
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INTRODUCTION
The aim of this dossier and its companion
[M 3 586]
, which deals with the manufacturing side of this type of tooling, is to provide the reader with an overview of foundry tooling, from its constitution and design to its final use: manufacturing methods, materials and future prospects.
Here, we'll start by taking a very general look at their constitution and design. It should be stressed that, in principle, this role does not fall to the "foundryman", but to the "toolmaker", whose main skills, in addition to those specific to the tools he designs and manufactures, are Computer-Aided Design and Manufacturing (CAD/CAM) and the subsequent stages involved in their manufacture (see
[M 3 586]
).
Important: as the various foundry techniques used are very precisely described in other dossiers in Techniques de l'Ingénieur, we encourage the reader to refer to the following references:
[M 3 500][M 3 510]
,
[M 3 512]
and
[M 3 540]
.
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Foundry tooling - Design