Damping
The ability of an elastomer to absorb forced vibrational energy
Daylight Opening
The clearance between two platens of a clamping press in the open position
Deburr
Removal of material from a drilled or punched hole, waste from saw cuts of material or sharp or rough edges
Deep Injection
A common molding defect identified by the deep depression in the rubber part at the point of injection
Deflashing
Any of various processes used to remove extraneous rubber from a molded rubber part
Delamination
The surface of the finished part separates or appears to be composed of layers of solidified resins. Strata or fish scale-type appearance where the layers may be separated
Density
Weight per unit volume of a substance expressed in grams per cubic centimeter
Diametrical Clearance
The gap between the two mating metal surfaces forming a gland's internal cavity. Through slight oversizing and accompanying "squeeze" the O-Ring seals this gap to prevent system leakage
Diaphragm Gate
Used in symmetrical cavity filling to reduce weld-line formation and improve filling rates
Die Cut
The process of stamping out the I.D. or O.D. parting line flash or feed from a part. The part is placed on a mechanical fixture to perform this function
Direct Gate
The sprue feeds directly into the mold cavity
Dispersion
Finely divided particles of a material in suspension in another substance
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