Hello,
I would like to ask people who have interest and experience with using of "shrinkage" analysis with Moldflow couple of questions.
Of course, I would be glad if also somebody from Moldflow could perhaps comment if sees the need:
1. Is shrinkage analysis, in sense of analyzing that certain tolerance of certain dimension can be reasonably achieved used in industry a lot or is it just such a feature of Moldflow that is there but not really used too much by companies?
2. Everyone knows that absolute majority of plastic parts are of "kind" that "ordinary" supplier will only guess from his best experience (or maybe from some few studies he done by measuting some molds and parts...) what is the uniform shrinkage and he will just expand the CAD part model by this number to have models of cavity / core. In some very rare case, maybe some distance between 2 boses may be somehowat accounted for with some more accurate estimate and this distance in tool might be different than it would be compared applying uniform shrinkage factor on tool design. This is at least practice I know from our suppliers. So question is: does anybody know suppliers who are using Moldflow for exactly this - calculating distance of important feature in tool to have get molded part up to spec tolerances?
3. In "shrinkage analysis" in Moldflow, results are listed in log file. Basically, when "critical dimension" is defined (like some lenght of the box), in log file you can read what is the required mold dimenions.
My question is: this mold dimension as well as "predicted" part dimension is calculted by Moldflow with some tolerance. Can anyone explain how this is calculated (tolerance) by Moldflow? Is it coming from some uncertainty of shrinkage as I can immagine? But... it is not mentioned anywhere how is possilbly this variation of shrinkage actually meant / considered.
Actually, would be great if Moldflow stuff can supply very clear example from practice. Something graphical, with clear descriptions of how this was maybe done in past and now how it can be done with Moldflow. You know, something on very practical level.
Thank you
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3. Send a request local support or Autodesk support team. They will surely help you to proving results
To your last point on how it works with an example.Have you looked at the help on this topic?
http://help.autodesk.com/view/MFIA/2015/ENU/?guid=GUID-251570E6-8C31-4DEA-9FA4-81415AE12BD2
@ supportmoldflowthailand
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