Learn how to create inside geometry with the core method.
- [Instructor] Here to create the B side, I'm going to use a method called the core cavity method. With the core cavity method I'm basically defining a new body that's going to represent the core. The main A side body is your cavity. And when we're dealing with an injection mold, you have your core side, you have your cavity side. Now, this works great for a lot of plastic parts. There may be things that this isn't going to work for, let's say like an automotive fascia, big, large parts that have really ginormous amounts of data going into them.
But for things that you're going to see around your house, like power tools, maybe the mouse that you're using, this core cavity method is going to be absolutely perfect. Because what you're basically doing is you're not just simply giving the part a thickness, you're defining what the actual core would look like that makes the B side. So I'm just going to go ahead and hide this surface. Let me go ahead and hide the Die_Line and with that, if I come in to this Trim and Extend, this actually makes that solid volume.
I'm going to take and right mouse click on this and do an extract body here and then I'm going to hide the original. So I've taken and made an exact linked duplicate of the initial A side. Now, to get to the B side, I'm going to use what called Offset Face. So with this Offset Face, I want to take it and pick this face, and this is going to be my thickness. Just start typing it in, and you'll notice it wants to go to the outside, but I want this to go to the inside so I'll just reverse it so I'm going in the actual thickness.
I select OK, and what actually ends up happening now is I've taken that body, and done my Offset Face to get the appropriate thickness. Now, when I come in here, and show the Trim and Extend you'll see there's the edge, or the boundary for that offsetted region, and that is the core body. Now, to actually do the coring it's a simple act of doing the subtraction. So I'll just go over to Unite, next to Unite, hit the little down arrow, hit Subtract, and this is absolutely critical that you have the order set correctly.
Target is the initial Trim and Extended body. The Tool is the core. Remember, this is the actual tool that we're going to design, or define to represent the B side. So I just pick my core, and select OK. And, as you can see, it does the removal for me. So, it's not just a simple shell. It's the actual tool, what it's going to look like in the process of manufacturing the part. So that is your core cavity design.
- 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