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Mold Tools · Lesson 3: Shut off and split

Shut-off surfaces for the openings, then a parting surface perpendicular to the direction of pull.

Lesson goal

Prepare the surfaces that will cut the tooling block in two.

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2 videos

✎

1 exercise

Advanced

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Prerequisite: Lesson 2

1. Watch the videos

Dassault Systèmes videos hosted on MySolidWorks: they open in a new tab and a free account is enough. Watch them in order.

Shut-Off SurfacesVideo 1▶Shut-Off SurfacesClose the through openings so the tooling block can be split.↗ Parting SurfacesVideo 2▶Parting SurfacesCreate the parting surface from the parting line and explore its options.↗

2. Key takeaways

1

Each through opening in the part must be closed with Shut-off Surfaces, otherwise the block does not split in two.

2

Shut-off surfaces are often created automatically; redo by hand the ones whose shape is not right.

3

The Parting Surface extends the parting line outward, perpendicular to the direction of pull.

4

Its width must extend beyond the edges of the future tooling block.

Tip

If a shut-off surface fails, look at the parting line first: a missing or extra edge is the most common cause.

3. Do the exercise

Continue with the part from lesson 2:

  • identify all through openings
  • create the shut-off surfaces
  • create a parting surface that extends well beyond the part
✓To check: The core, cavity and parting surface folders appear in the tree, with no error message.

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