- Industry: Software
- Number of terms: 1241
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- Company Profile:
Moldflow develops plastic injection molding software.
The period during the injection molding process when plastic is injected to fill the cavity.
Industry:Software
The Poisson's ratio (n12) pertains to a material under tensile stress, and is defined as the ratio of lateral (or transverse) contraction strain (in the second principal direction) to the longitudinal strain (in the first principal direction.)
Industry:Software
The pressure gradient in the molten polymer is the pressure drop per unit of length along the flow path. The pressure drop from one location to another is the force that pushes the molten polymer to flow during filling. Polymer always moves from higher pressure to lower pressure, akin to water flowing from higher elevations to lower elevations.
Filling with a more uniform pressure gradient is desirable. Non-uniform pressure gradients often indicate problems such as flow hesitation, over-packing (resulting in flash) and under-packing (resulting in excessive shrinkage).
Industry:Software
The pressure stroke is the proportion of the total stroke performed under pressure control. This is the distance between the velocity to pressure change-over position and the screw forward position in an injection molding machine.
Industry:Software
The pressurization phase is the period during the injection molding process when extra plastic is injected to ensure all corners and edges of the mold cavity are full of plastic.
Industry:Software
The racetrack effect occurs when molten plastic flows into thicker regions more easily than thin regions. The flow divides and then fills thicker sections before combining again to fill the thinner sections. The recombined flow can reverse to meet the oncoming flow in the thinner section.
The racetrack effect can cause air traps, weld lines and regions of high internal stress.
Industry:Software
The screw back position is the position that the screw is brought back to before the start of the next cycle.
Industry:Software
The screw forward position is the furthest forward position of the screw during a cycle.
Industry:Software
The screw is the part of the injection molding machine that pushes the polymer into the mold, that is, the shaft that rotates within the barrel of the injection molding machine to process and prepare the material for injection.
Industry:Software
The shear strain of the polymer is the ratio of the deformed state compared to the original state, when a polymer has been deformed due to an applied load.
Industry:Software
