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Die Caster Terms
Information Provided by Kinetic Die Casting
- Industry term commonly used to describe
the mechanization of various aspects of die casting process.
- Excess of ladled metal remaining in the shot sleeve of a cold
chamber die casting machine. It is part of a cast shot and is removed
from the die with the casting.
- A surface bubble caused by gas expansion (usually from heating)
which was trapped within the die casting or beneath the plating.
- Voids or pores which may occur due to entrapped gas or shrinkage
during solidification, usually evident in heavy sections. (See porosity)
- The recess or impressions in a die in which the casting is formed.
- A type of die casting machine in which the metal
injection mechanism is not submerged in molten metal.
- Fine cracks on the surface a die which produce corresponding
raised veins on die casting. Caused by repeated heating of the die surface
by injected molten alloys. Also called heat checking.
- Liquid formulations applied to the die to facilitate
casting release and prevent soldering.
- Ability of a component to retain it's shape and
size over a long period of service.
- The taper given to walls, cores and other parts of the die cavity
to permit easy ejection of the casting.
- Marks left on castings by ejector pins.
- A rod which forces the casting out of the die cavity and
off cores.
- A plate to which ejector pins are attached and which
actuates them.
- Curved junction of two surfaces, e.g., walls which would meet
a sharp angle.
- A thin web or fin of metal on a casting which occurs on die partings,
vents and around moveable cores. This excess metal is due to working
and operating clearances in a die.
- Passage for molten metal which connects runner with die cavity.
Also, the entire ejected content of a die, including castings, gates,
runners sprue (or biscuit) and flash.
- Expansion of a casting as a result of aging or of intergranular
corrosion, or both.
- (See checking)
- Die casting machines which have the plunger, gooseneck
(metal pressure chamber) immersed in molten metal in the holding furnace.
- Ability to resist shock, as measured by a suitable
testing machine.
- Metal or alloy cast in a convenient shape for storage shipping
or remelting.
- The processes of forcing molten metal into a die.
- A piece of material, usually metal, which is placed in a die
before each shot. When molten metal is cast around it, it becomes an
integral part of the die casting.
- A type of core (which forms undercuts) which
is positioned in, but not fastened to a die. It is so arranged as to
be ejected with the casting and from which it is removed. It is repeated
for the same purpose.
- Core used primarily to reduce amount of metal in a casting
and to avoid sections of excessive thickness.
- A die having more than one duplicate impression.
- A recess in a die connected to die cavity by a gate to assist
in proper venting.
- A mark left on die casting where the die halves meet;
also, the mating surface of the cover and ejector portions of the die.
- Ram or piston which forces molten metal into a die.
- Voids or pores resulting from trapped gas, or shrinkage during
solidification.
- Where parameters of a process are studied and correctly
applied in the manufacturing process to produce high quality parts.
- Die passage connecting sprue or plunger holes of a die to the
gate where molten metal enters the cavity or cavities.
- The segment of the casting cycle in which molten metal is forced
into the die.
- Dimensional reduction that accompanies the
freezing (solidification) of metal, passing from the molten to the solid
state.
- A surface depression which sometimes occurs next to a heavy
section that cools more slowly than adjacent areas.
- The portion of a die arranged to move parallel to die parting.
The inner and end forms a part of the die cavity wall that involves one
or more undercuts and sometimes includes a core or cores.
- Adherence of molten metal to portion of the die.
- A die for shearing or shaving flash from a die casting.
- A die interchangeable with others in a common holder.
- Recess in the side wall or cored hole of a casting disposed
so that a slide or special form of core (such as a knockout) is required
to permit ejection of the casting from the die.
- Narrow passage at the die parting which permits air to escape
from the die cavity as it is filled with molten metal.
- A large pore or hole within the wall of a casting usually caused
by entrapped gas. A blow hole.
- A tube or passage though which water is circulated to cool
a casting die.
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