Fiber concentration

[dinesh27mec]

Hi all, 

Do we have any plot in Moldflow, which aids in determining the fiber conentration in particular region ?

For Ex : I need to know amount of fiber  present in my part as well as in ribs or other features .

Thanks in advance !

[tim.vanast]

I'm curious about your question.  If we assume a 30% short glass filled material, why do you suspect that there is more, or less, fiber in one area of the part compared to another area?

Tim

[inba.oneway777]

Hi,

I want to add on this,

why moldflow does not predict the E-modulus for unfilled material.

[dinesh27mec]

Tim,

I am not suspecting it to be varying, but i intentionally need to do it for my application. So as to have rich fiber filled material at one surface, while other surface it starved for fiber. 

So i need help of moldflow to simulate the same .

Thanks

[tim.vanast]

I've heard of running the tool temperature high in order to create a "resin rich surface" for better appearance.  But I've not heard of trying to get more glass on one surface, and less on another.  Unfortunately, I'm not sure the glass is the smart. Most of the glass fibers have a chemical coupling agent on them to attach them to the resign.  So I don't think it's really possible to shift glass filler one way or another. 

I know people are doing some glass mat overmolding, where they have a unidirectional glass fiber mat (or multi-layer) that injection mold over.  This gives glass on one side on and resin on the other.  But I'm not sure this is what you are trying to achive.

Good luck,

Tim

[dinesh27mec]

I may be late .

Apologies Tim, i misunderstood the whole concept. As you rightly mentioned, i need resin rich layer to avoid reduction in wearing out of another metal part to be assembled to this molded part.

Thanks

[tim.vanast · Accepted solution]

The only way I've ever heard of that is to use a hot mold.  While you can use Moldflow to simulate a hot mold, it will not tell you anything about what that does to the fibers or the amount of fibers on the surface.

Regards,

Tim

[dinesh27mec]

Thanks Tim !