- [Instructor] So before we get into the rest
of the course, I want to talk about some
very important terminology.
Things that you absolutely have to understand
in order to get the most out of this.
So when I'm referring to the part or part body,
I'm talking about the part that we're designing,
the injection-molded part.
We have what's called a cavity,
which is the A side or the show side
of the part.
And then you have a core, which is basically
the removal or the inside of the part.
So if I hide the cavity and rotate this,
you can see that this nests nicely onto the core.
So basically, the core is the positive imprint
of the B side.
The B side is the negative off of the core.
And the same thing with the cavity.
I go to the cavity and have a look,
turn off the core, you can see the part
is pushed into the cavity.
So that cavity has that, again, negative imprint
of the final part.
So that shows the A side.
We also have what's called the parting surface.
This is also referred to as the shut-off
where the two halves of the mold come together.
We have a die line which is the direction
that the tools travel as they come apart.
So in order to get the part out, basically,
the core moves away from the cavity
in that direction.
So that tooling direction is critical
to design off of.
You want to make sure that everything you design
is open to the draw or the die line
or the tooling direction so the part
can eject out correctly.
So these are some very important
terminology terms, things that you need to know
about a injection-molded part as you get in
and start designing an injection-molded part.
You want to make sure that you understand
that you're designing the part body.
The part body's going to drive the cavity
for the mold and also the core for the mold.
And the molds separate at the parting surface.
And the die line, again, is the direction
of travel for the tools as they separate.