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ME 383 Test 2 Questions and Answers
(Expert Solutions)
Q: Expendable mold processes, 🗹🗹: mold is sacrificed to remove part
Q: Permanent mold processes, 🗹🗹: mold is made of metal and can be used to make
many castings
Q: Examples of expendable mold processes, 🗹🗹: shell molding
expanded polystyrene
investment casting
plaster mold
ceramic mold
Q: shell molding, 🗹🗹: Casting process in which the mold is a thin shell of sand held
together by thermosetting resin
Q: expanded polystyrene, 🗹🗹: uses a mold of sand packed around polystyrene foam
pattern which vaporizes when molten metal is poured into mold
Q: investment casting, 🗹🗹: A pattern made of wax is coated with a refractory
material to make the mold, after which wax is melted away prior to pouring molten
metal
Q: plaster mold casting, 🗹🗹: similar to sand casting except mold is made of plaster
of paris
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Q: ceramic mold casting, 🗹🗹: similar to plaster-mold casting, except that the mold is
made of refractory ceramic materials that can withstand higher temperatures than
plaster
Q: Examples of permanent mold casting processes, 🗹🗹: basic permanant mold
casting
die casting
centrifugal casting
Q: basic permanent mold process, 🗹🗹: uses a metal mold constructed of two
sections designed for easy, precise opening and closing
Q: die casting, 🗹🗹: molten metal is injected into mold cavity under high pressure
Q: hot-chamber die casting, 🗹🗹: Metal is melted in a container, and a piston injects
liquid metal under high pressure into the die
Q: cold-chamber die casting, 🗹🗹: molten metal is poured into an unheated chamber
from an external melting container, and a piston is used to inject the metal under high
pressure into the die cavity.
Q: centrifugal casting, 🗹🗹: family of casting processes in which the mold is rotated
at high speed so centrifugal force distributes molten metal to outer regions of die cavity
Q: types of centrifugal casting, 🗹🗹: true centrigual
semicentrifugal
centrifuge
Q: true centrifugal casting, 🗹🗹: molten metal is poured into rotating mold to
produce a tubular part
ME 383 Test 2 Questions and Answers
(Expert Solutions)
Q: Expendable mold processes, 🗹🗹: mold is sacrificed to remove part
Q: Permanent mold processes, 🗹🗹: mold is made of metal and can be used to make
many castings
Q: Examples of expendable mold processes, 🗹🗹: shell molding
expanded polystyrene
investment casting
plaster mold
ceramic mold
Q: shell molding, 🗹🗹: Casting process in which the mold is a thin shell of sand held
together by thermosetting resin
Q: expanded polystyrene, 🗹🗹: uses a mold of sand packed around polystyrene foam
pattern which vaporizes when molten metal is poured into mold
Q: investment casting, 🗹🗹: A pattern made of wax is coated with a refractory
material to make the mold, after which wax is melted away prior to pouring molten
metal
Q: plaster mold casting, 🗹🗹: similar to sand casting except mold is made of plaster
of paris
, Page | 2
Q: ceramic mold casting, 🗹🗹: similar to plaster-mold casting, except that the mold is
made of refractory ceramic materials that can withstand higher temperatures than
plaster
Q: Examples of permanent mold casting processes, 🗹🗹: basic permanant mold
casting
die casting
centrifugal casting
Q: basic permanent mold process, 🗹🗹: uses a metal mold constructed of two
sections designed for easy, precise opening and closing
Q: die casting, 🗹🗹: molten metal is injected into mold cavity under high pressure
Q: hot-chamber die casting, 🗹🗹: Metal is melted in a container, and a piston injects
liquid metal under high pressure into the die
Q: cold-chamber die casting, 🗹🗹: molten metal is poured into an unheated chamber
from an external melting container, and a piston is used to inject the metal under high
pressure into the die cavity.
Q: centrifugal casting, 🗹🗹: family of casting processes in which the mold is rotated
at high speed so centrifugal force distributes molten metal to outer regions of die cavity
Q: types of centrifugal casting, 🗹🗹: true centrigual
semicentrifugal
centrifuge
Q: true centrifugal casting, 🗹🗹: molten metal is poured into rotating mold to
produce a tubular part
