When plastic material is injected into a mold cavity, it is cooled and solidifies to from a part that is made to final part dimensions.However, if the cooling of this part in the mold is not uniform,

Voids are formed inside the wall of a part and can adversely affect the structural performance of the part. Except in transparent parts, voids can be invisible to the naked eye.

Splay marks, also referred to as silver streaks, appear as a blister that radiates over the surface of a part from the gate. If you were to take a small, sharp metal blade and scrape one of these

Sink marks on a plastic part appear as a depression or dip on the part surface. These are created when the shrinkage of the molten core of a part wall is greater that that of the skin. This larger shr

​A short shots or insuficient workpiece fill is a molded part that is underfilled or not filled completely. Visually, this can be seen as sections, such as the last areas of the part to fill, or

Jetting is a phenomenon that occurs in injection molding when molten plastic material flows through the gate and forms a wormlike formation without laying down a skinned surface. The formation beco

Dimensional stability problems occur when a part is inconsistent in part size or in part weig from shot to shor. Parts that are underweight can suffer in structural integrity; overweight parts can als

Delamination is a condition that exists when the surface skin of a molded part can be physically separated from the part, which can lead to a reduction in mechanical strength. lists causes and solutio

In comparison to nozzle drool, material at the nozzle can solidify and restrict and block the flow of material. This is found mostly during the cooling cycle of the process or if the injection molding