TUTORIAL: Creating a cavity split in Moi

[bigseb]

This thread refers.

Tome asks how to create cavities for a mould from an imported step file using Moi. The following steps will explain the steps:

 

[bigseb]

STEP 1

Open Moi and import the model:


Clicking on the model will show that it is a solid:

 

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STEP 2

I like to keep the original model available so I create a copy of it and work with the copy. below you will see the original:


... and the copy:

 

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STEP 3

The next step is to separate the imported solid into surfaces. Click on the model and then click on separate:

 

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STEP 4

Switch to 3D view. In this step all the unnecessary surfaces will be deleted i.e all the surfaces that will be needed for that particular cavity are to be kept. A bit of planning and forward thinking is required here as you are essentially creating the splitline. Simply select the surfaces you don't need and delete:

 

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STEP 5

All the holes need to be closed. Do this by selecting the edges of a hole and creating a planar surface:

 

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STEP 6

Repeat process for the remaining holes:

 

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STEP 7

Join all the surfaces:

 

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STEP 8

Time to extrude the edges to create the splitline surface. Click on Extrude:


Select the edges you want to extrude:


Within the extrude tool you specify the direction of the extrusion (should it not extrude in the correct direction). This is the result:

 

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STEP 9

Repeat Step 8 for the remaining sides. When done join all the surfaces:

 

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STEP 10

Switch to front view for the next step. Draw a line down the middle of your part (snaps will make this a doddle). Next select the rectangle tool (centre to edge) and pick the middle of the line you just created as the centre. In the rectangle tool you can enter the limits of your rectangle:



Switch back to 3D view. Extrude the rectangle in arbitrary distance in both directions. Delete the rectangle and line after this step:

 

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STEP 11

Time to trim the edges. Click on the trimming tool. Select the surface you want to trim (box) and click done. Select the cutting surface and click done. Select the section of the box you don't want and click done:


Repeat process for the splitline surface:

 

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STEP 12

Rotate the model to see the back. Trim the edges of the box to create the desired plate height:


Create a planar surface to close the back:

 

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STEP 13

Last step. Select the entire model and click on join to create a solid which can then be imported into Geomagic Design:

 

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Hopefully this was helpful. If anything is unclear please feel free to ask. Attached below is the model.

 

[bigseb]

I just remembered another tutorial I wrote on using Moi to created cavity splits. This tutorial uses a different method due to the complexity if the article. Combined with this tutorial it shows the usefulness of Moi for such operations.

Find it here