manufacturing processes final exam
foundry - Answer-a factory equipped to handle metal in the molten form and where castings are
produced
mold - Answer-A cavity, sometimes consisting of two sides, that (neglecting shrinkage) determines the
size and shape of a part
compare and contrast the characteristics of casting processes using expendable and permanent molds -
Answer-- expendable molds can make a wider variety of parts
- permanent molds can create the same part many times
pattern - Answer-A full-sized model of a part, enlarged to account for shrinkage and machining
allowances, used in sand-mold casting
lost-foam process - Answer-This casting process uses a mold of sand packed around a pattern that
vaporizes when the molten metal is poured into the mold
die casting - Answer-This permanent mold process injects molten metal into the mold cavity at high
pressures
silica - Answer-This is the principal starting material in glassworking
what is the primary difference between thermoplactics and thermosets? - Answer-thermoplastics are
remoldable, while thermosets are suitable for high temperatures (because they are not remoldable)
, extrusion - Answer-This fundamental shaping process (used for metals, ceramics, and polymers) uses
compression to force material through a die orifice, resulting in a long continuous product whose cross-
sectional shape is determined by the die orifice
calendaring - Answer-This process is used to produce sheet and thin film stock out of rubber or rubbery
injection molding - Answer-A process where a polymer, in a highly plastic state, is forced to flow into a
mold cavity, where it solidifies
parison - Answer-The starting tube of molten plastic used in blow molding
rotational molding - Answer-This process uses gravity and a rotating mold to produce large hollow parts
from polymers
thermoforming - Answer-A process in which flat thermoplastic sheet is heated and deformed into the
desired shape.
vulcanization - Answer-The cross-linking of the polymer molecules in rubber
carbon black - Answer-This is the most important reinforcing filler in rubber because it increases tensile
strength and resistance to abrasion
soaking - Answer-The operation (done prior to roll forming) of heating a cast steel ingot until it has
reached a uniform temperature throughout
forging - Answer-A deformation process in which the work is compressed between two dies, using either
impact or gradual pressure to form the part
foundry - Answer-a factory equipped to handle metal in the molten form and where castings are
produced
mold - Answer-A cavity, sometimes consisting of two sides, that (neglecting shrinkage) determines the
size and shape of a part
compare and contrast the characteristics of casting processes using expendable and permanent molds -
Answer-- expendable molds can make a wider variety of parts
- permanent molds can create the same part many times
pattern - Answer-A full-sized model of a part, enlarged to account for shrinkage and machining
allowances, used in sand-mold casting
lost-foam process - Answer-This casting process uses a mold of sand packed around a pattern that
vaporizes when the molten metal is poured into the mold
die casting - Answer-This permanent mold process injects molten metal into the mold cavity at high
pressures
silica - Answer-This is the principal starting material in glassworking
what is the primary difference between thermoplactics and thermosets? - Answer-thermoplastics are
remoldable, while thermosets are suitable for high temperatures (because they are not remoldable)
, extrusion - Answer-This fundamental shaping process (used for metals, ceramics, and polymers) uses
compression to force material through a die orifice, resulting in a long continuous product whose cross-
sectional shape is determined by the die orifice
calendaring - Answer-This process is used to produce sheet and thin film stock out of rubber or rubbery
injection molding - Answer-A process where a polymer, in a highly plastic state, is forced to flow into a
mold cavity, where it solidifies
parison - Answer-The starting tube of molten plastic used in blow molding
rotational molding - Answer-This process uses gravity and a rotating mold to produce large hollow parts
from polymers
thermoforming - Answer-A process in which flat thermoplastic sheet is heated and deformed into the
desired shape.
vulcanization - Answer-The cross-linking of the polymer molecules in rubber
carbon black - Answer-This is the most important reinforcing filler in rubber because it increases tensile
strength and resistance to abrasion
soaking - Answer-The operation (done prior to roll forming) of heating a cast steel ingot until it has
reached a uniform temperature throughout
forging - Answer-A deformation process in which the work is compressed between two dies, using either
impact or gradual pressure to form the part
