From the course: CATIA V5: Design for Injection Molding

Part overview and terminology - CATIA Tutorial

From the course: CATIA V5: Design for Injection Molding

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Part overview and terminology

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- [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.

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