- 行业: Software
- Number of terms: 1241
- Number of blossaries: 0
- Company Profile:
Moldflow develops plastic injection molding software.
An orthotropic material consists of either oriented fibres or oriented polymer chains. Mechanical properties in the direction parallel to the orientation are different from those in the perpendicular direction.
Industry:Software
Consists of three-node triangular elements located at the half-thickness of the part surface.
Creating a Midplane mesh from a solid model involves extracting the mesh and the element thickness from the model. The two-dimensional Midplane mesh represent the solid model, using the thickness information, during a moulding analysis.
Industry:Software
Designates the transition from one phase to another, for example, the transition from the filling phase to the packing phase. Various switch-over methods can be used.
For example, fill-to-pack switch-over can be initiated when the injection time or pressure reaches a specified value, when a specified percentage of the volume is filled, or when other conditions are met.
Industry:Software
During shear flow, polymer molecules align themselves in the direction of flow. The extent of this orientation depends on the shear rate to which the material is subjected and the temperature of the melt. When the material stops flowing, the induced molecular orientation begins to relax at a rate dependent on the material's relaxation time and temperature. If the material freezes before relaxation is complete, the molecular orientation is "frozen in".
Frozen-in orientation affects the mechanical properties of the material and also the shrinkage in the direction of material orientation. For a given element, the mechanical properties and the amount of shrinkage are different in directions parallel and perpendicular to the direction of material orientation.
Industry:Software
Excessive tooling noise may occur due to moulding problems where the injection pressure is too high toward the end of the velocity phase. Excessive tooling noise may lead to tool damage after repeated usage.
Industry:Software
Fibre orientation is the direction of the fibers' major axis, relative to the flow direction.
Industry:Software
Fillers are materials that can be added to a polymer for injection molding. Adding a filler to a polymer can increase the strength of the polymer and ensure that good quality parts are produced.
Industry:Software
Flow fronts from 2 directions meet, then pause momentarily, long enough for a frozen layer to develop, then the polymer in one of the flows reverses direction and flows back between the outer frozen layers. When the flow reverses the frozen layer partly re-melts due to frictional heating. This flow reversal gives poor part quality, both from surface appearance and structural viewpoints.
To avoid underflow balance all flows so that their flow fronts meet at the end of fill.
Industry:Software
Flow leaders and deflectors are surfaces with thicknesses designed to direct the flow front, either by attracting it (leaders) or by deflecting it (deflectors). Flow leaders are thicker parts of the cavity (indicated by the yellow arrow in the figure below) which attract the flow. Deflectors are thinner parts of the cavity (indicated by the red arrow) which constrict the flow and slow it down.
Industry:Software
Friction is a force which acts against motion. When a part is being ejected, if there is high friction between the part and the mould walls, then the part may be impossible to eject, or it may be damaged during ejection.
Industry:Software
