- [Instructor] I want to do a quick overview
of some of the terminology that is going
to be mentioned in this course.
Now, as we're building our part,
we're going to mention things like core and cavity,
parting surface, die line, those kinds of things,
understanding what the shut-off is.
So before we actually get into making the geometry,
it's going to be important
for you to understand some of the terminology.
Now, after we define what our part is,
we have something called a cavity,
and we have another thing called a core.
The cavity is the positive side of the part.
So anything that's injection-molded has a shape
to the external portion of it, and that is the cavity.
If I go ahead and hide some of these other bits,
rotate that around, this is what would be used
to define the outer shell
of our part.
The core is used to define
the interior shell of the part.
And when you take those apart, you have a void space,
which is the actual final result.
So this is the part that's going to be made by a cavity,
the outside, the core, the inside,
and where those two tools come apart
is what's called the parting surface.
That parting surface defines very important input in that,
when the tools come together,
they sit, nest flush to one another.
And when they come apart, that's where the tools separate
and the part comes out from.
The direction that the tools come apart is the die line.
The die line is how the tools travel
when they come together and when they pull apart,
and it's also the direction
that the part ejects from the actual cavity.
So understanding what these things are
is going to be pretty important
so you know what you're designing, why you're designing it,
and then how to design.