- Industry: Software
- Number of terms: 1241
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- Company Profile:
Moldflow develops plastic injection molding software.
A meld line is a weakness or visible flaw created when two or more flows meet and converge while filling a part. A meld line is typically formed by parallel flows, whereas weld lines are formed by flows meeting at higher angles, often head-on. Meld lines tend to be less weak than weld lines. The quality of the meld line is dependent on the material type, the type and amount of fillers, and the pressure and temperature at the meld line.
Industry:Software
A mesh consisting of surface (double-skin) shell elements. Surface mesh elements can be 3 or 6 noded planar, straight-edged triangles.
A surface mesh analysis simulates the flow of the melt on both the top and bottom parts of the mould cavity. Consistency between the results on the opposite sides is maintained by using “connectors” - elements with zero flow and heat resistance. The connectors are inserted automatically at locations determined by the geometric features of the model.
A surface mesh can include Midplane areas.
Industry:Software
A non-manifold edge is a mesh edge with more than two entities attached to it. An edge is a line segment that connects two mesh nodes.
On a Fusion mesh, non-manifold edges should be corrected because they indicate elements which have not been correctly attached.
A = free edges
B = manifold edge
C = non-manifold edge.
See also free edge and manifold edge.
Industry:Software
A pinpoint gate is a small gate, generally 0.75mm or less in diameter. In multi-cavity molds, the dimensions of pinpoint gates must be held within very tight tolerances in order to fill all cavities at the same time.
The advantage of such a small gate is that it leaves a small, easily-removed mark on the part.
Disadvantages include the following:
*The melt tends to freeze early in a pinpoint gate, as the flow slows. For this reason its use is limited to small parts and to resins with good fluidity.
*Pinpoint gates often require a third plate (for part removal), increasing mould expense.
*Pinpoints gates can lead to very high shear rate and high entrance pressure loss.
An indirect gate is a variant of a pinpoint gate. Indirect gates are used when the injection location must be transferred from centre of part.
Industry:Software
A planar space defined by a consistent set of curves. The curves connect but must not intersect.
Industry:Software
A plastic in a mixed state of crystalline and amorphous conditions. Most plastics are semi-crystalline. The crystalline content determines the physical properties or the part.
See also crystalline.
Industry:Software
A point is a position in space. The first stage of creating a model is usually the creation of points, which are then joined together to create surfaces.
Industry:Software
A polymer is a natural or synthetic compound, usually of high molecular weight. Its long-chained structure consists of repeated linked molecular units called monomers (or mers). Monomers are relatively light and simple. A chemical polyermization process builds polymers from monomers.
Although the term plastics is often used as a synonym for polymer, plastics are actually one type of polymeric compound. Plastics are generally formulated with plasticizers, stabilizers, fillers, and other additives for the purpose of processing and performance.
Non-plastic polymeric systems include rubbers, fibers, adhesives, and surface coatings.
Processing polymers into end products mainly involves physical phase change such as melting and solidification (for thermoplastics) or a chemical reaction (for thermosets).
Industry:Software
A preferred moulding window is a refinement of a feasible moulding window. It is represented by a set of boundaries that define a window-like shape. For the process setting ranges inside the preferred moulding window boundaries, the moulding process is optimal; outside the window boundaries, the moulding process is not optimal, but it may be feasible.
See also feasible moulding window
Industry:Software
A pressure profile is a graph made up of set points joined by lines. The set points determine the pressure to be applied at specific time intervals. The pressure profile controls how the part is packed out during the pressure stage of a cycle.
Industry:Software
