This video defines the various elements and terms used in designing a molded part.
- [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.
- Inputting styling data (the A side)
- Defining the parting surface
- Creating the B side
- Adjusting part thickness
- Creating bosses and ribs
- Draft analysis
- Adjusting wall thickness
- Final fillets to represent the real-world shape