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This cavitymay have resultedfrom post - casting shrinkage
sections of the casting that solidify later than the surrounding sections and do not have enough metal flow into the section for a complete fill(passive) are caused byShrinkage - related casting voids
When the alloy solidifies , gas is releasedto causecasting shrinkage
Feeders or risers supply extra metal as the casting solidifiesto preventshrinkage occuring inside the casting
lacking in harmony with wax and an investing material that are a wax pattern material and a cast material(passive) caused bycasting shrinkage
the type and temperature of the wax injection pressure , holding time and metal casting processmay ... contributeto casting shrinkage
which provides a source of hot metalto preventshrinkage in the casting
orderto preventshrinkage during casting
to an under - pressure in those areas where feeding is neededleadsto an under - pressure in those areas where feeding is needed
cracks in the casting over the mould unless the casting is free to shrink away from its mouldcan createcracks in the casting over the mould unless the casting is free to shrink away from its mould
alsoinfluencesalso
material(passive) caused bymaterial
dimensional changescausesdimensional changes
to voids not typical incan leadto voids not typical in
a pressure drop and viscous flow of enriched liquid inside the mushy zonecausesa pressure drop and viscous flow of enriched liquid inside the mushy zone
A riser(passive) is setA riser