Slide 1
A mould cavity gives molten metal its shape
Casting forms a part by letting molten material solidify in a mould. The cavity defines much of the final shape.
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Internal cores can create passages that would be difficult to machine from solid stock. Removing those cores and inspecting enclosed regions are additional design tasks, not automatic benefits of complexity.
Slide 2
The inlet arrangement controls how the metal fills it
Gates and runners guide metal into the cavity. Their arrangement influences turbulence, temperature loss and whether thin regions fill completely.
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A poorly controlled flow can trap gas or carry oxide films into the casting. The route from pouring point to cavity therefore affects internal quality as well as production speed.
Slide 3
A riser supplies metal as the casting shrinks
Many casting alloys shrink as they solidify. A riser supplies additional liquid metal to compensate where feeding remains possible.
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The riser must remain liquid long enough to serve the region being fed. If its connection freezes first, a reservoir of metal cannot prevent a shrinkage void in the isolated part.
Slide 4
Uneven cooling creates different internal structures
Solidification conditions influence grain structure and local properties. Thick and thin sections can cool differently within one casting.
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Abrupt thickness changes can create hot spots and residual stress. Smoother transitions help control both feeding and cooling, showing why manufacturability begins with the part’s geometry.
Slide 5
Finishing and inspection follow solidification
Gates and risers are removed after solidification, and critical surfaces may be machined. Inspection checks whether internal quality suits the application.
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A near-final shape can reduce machining waste without eliminating dimensional allowances or heat treatment. The whole process includes these later steps when comparing casting with another manufacturing route.