- 産業: Software
- Number of terms: 1241
- Number of blossaries: 0
- Company Profile:
Moldflow develops plastic injection molding software.
Fiber 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 mold walls, then the part may be impossible to eject, or it may be damaged during ejection.
Industry:Software
Gate freeze is the moment during the packing phase when polymer at the gate has frozen solid and no more polymer can be packed into the mold cavity.
Industry:Software
Gloss is the shiny appearance of a molded part's surface. Differences in the gloss finish of a part are caused by different projection behaviors of the plastic at the mold wall, due to different cooling conditions and shrinkage differences. You can remove dull surface patches by drying the material, decreasing the injection speed or increasing back pressure.
Industry:Software
High cushion occurs when the cushion is too large and the material is kept in the barrel for too long. This can result in defects such as short shot.
Industry:Software
Hydraulic pressure is the pressure applied to the injection ram during the injection phase. Setting hydraulic pressure is one way of specifying the velocity phase for the molding cycle. The hydraulic line pressure is the pressure in the main supply line from the pump; typically measured by means of a gauge in the hydraulic line. There is a direct relationship between the injection pressure and the hydraulic line pressure called the machine intensification ratio.
Industry:Software
In a part with multiple flow paths, the flow can slow down or hesitate in thin regions. This allows the melt to cool in thin regions and in some cases freeze before filling is complete, causing short shots. Flow hesitation is most likely to occur in parts containing thin diaphragms, ribs and hinges.
Industry:Software
