- [Instructor] Another very important check
that you have to perform is the wall thickness check.
When you're doing something like an injection molded part,
you want to verify that the walls
aren't too thick in certain areas.
A very important area to check is anything under ribs
or any areas that may have gotten
too thick in order to mold correctly.
So, with the Wall Thickness Analysis tool,
you just basically pick your part body,
give it a Tolerance of say a tenth of a millimeter.
It's just a small part so I really want to
verify very tight tolerance and just simply hit Run.
What the system's going to do is it's going to set up a focus
and I want to focus on the thick areas, not the thin areas.
I really don't care about thin areas on this.
I know I've designed some pretty thin spots and that's fine.
Now the thick areas are anything
greater than 2.5 millimeters.
So I want to verify that I don't have anything
that is greater than that.
Now, as you can see under the ribs,
I have some areas that are just coming back
indicating that this could potentially be a problem.
The problem with this is, if I take a look at this,
let me come down and select OK,
and I'm just going to cut a section view through the part.
Just pick it right on this edge.
If I look at this and I zoom up,
the rib thickness is the same thickness
as the rest of the part.
And what ends up happening is,
when I come in and do the molding,
there's going to be a lot of material in this area.
Well, that material is going to be heated
200 degrees, 300 degrees, 400 degrees,
and as it begins to shrink, this area of thickness
is going to create, basically, a little dip.
So you'll be able to see that rib on the A side,
which is a big no no.
We don't want to see these things.
So, by running that thickness analysis...
Just going to exit out of that,
go back into my thickness analysis.
By running my thickness analysis, I can pick up on
that I could potentially have areas along those ribs
that are going to be too thick
and thus, shrink a bit too much and show on the A side.
If this is a piece that's going to be a big showpiece,
interior of a car, exterior of a car,
let's say like a fascia or if it's
something nice at home, like a power tool,
you don't want to see these things.
If it's a non-showpiece then you may
just care that it's very strong.
You may not care about the rib thickness.
But if it's a showpiece, you're going to want to go back
and reduce the thickness of those ribs
so you don't end up with these kinds of thick areas.
Again, those thick areas will cause little depressions
on the A surface, which is exactly what we do not want.
So, running this Wall Thickness Analysis
gives us an indication of where our problems are going to be.