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Week 2 (Overview, heating and pouring (Mold (Open mold, Close mold,…
Week 2
Overview, heating
and pouring
Advantages
Disadvantages
Mold
Open mold
Close mold
Basic features
Processes
Expendable mold processes
permanent mold processes
Steps in casting
Melt the metal
2.Pour in into a mold
by gravity or force
Let it solidify into the mold
Processes
description
Investment casting
Permanent mold casting
Die casting (hot chamber)
Die casting (Cold chamber)
Solidification &
Cooling
Cooling curve
Solidification time
Shrinkage during solidification and cooling
Defects and
Product design
General
defects
Misrun
Cold shut
Cold shot
Shrinkage cavity
Microporosity
Hot tears
Sand casting defects
Sand blow
Pin holes
Penetration
Mold shift
Mold crack
Product design
consideration
Geometric simplicity
Corners on casting
Section thickness
Draft angle
Dimensional tolerance &
Surface finish
Machining allownce
