parting


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parting

Chem a division of a crystal along a plane that is not a cleavage plane

parting

[′pärd·iŋ]
(geology)
A bed or bank of waste material dividing mineral veins or beds.
A soft, thin sedimentary layer following a surface of separation between thicker strata of different lithology.
A surface along which a hard rock can be readily separated or is naturally divided into layers.
(metallurgy)
Recovery of gold (or occasionally another metal) from its alloys by a corrosion process.
Zone of separation between cope and drag portions of mold or flask in sand casting.
In sand molding, a composition to facilitate removal of the pattern.
A shearing operation to produce two or more parts from a stamping.
(mineralogy)
Fracturing a mineral along planes weakened by deformation or twinning.
References in periodicals archive ?
The distance between heaters and parting line should be far enough to prevent any warping or bending of the plate, however, which would produce flash on molded parts.
Figure 3a illustrates a casting in which the cross-sectional area increases moving away from the parting line (located at the top surface of the casting), which forces an undercut into the casting process.
This is accomplished by designing a gasket into the parting line and using a vacuum pump to quickly evacuate all cavities.