You can also split existing mold volumes to create volumes for sliders, lifters, inserts, and so on.
• Split mold volumes using the Mold Volume split option.
– Specify the volume to be split in the Search Tool.
• The specified volume is split into one or two volumes.
– Use a parting surface or other volume.
Figure 3 – Core Volume After
Splits for Slider Volumes
You can split an existing mold volume in a mold model using the Mold Volume split option. This option is only available if the workpiece has already been split, or if you have sketched a mold volume slider, insert, or lifter, for example. Unlike the All Wrkpces option, when a mold volume is split, the system does not create a reference part cutout in the model tree.
When you specify the Mold Volume option, the system uses the Search Tool to perform a search for all quilts (mold volumes) in the mold model. You must specify the desired quilt (mold volume) to be split from the list of results found. You should not modify the parameters of the Search Tool to obtain different results.
A mold model containing sliders, inserts, or lifters needs to undergo multiple split operations because multiple mold components will be created from the mold model.
For each split operation you must determine how many resultant mold volumes are to be created by specifying one of the following options:
• Two Volumes — Splits the mold volume into two mold volumes.
• One Volume — Splits the mold volume into a single mold volume, “discarding” the other portion. You must specify which portion you want
included in the mold volume. This is done using the Island List. The Island List enables you to select which portion is to be included in the new volume.
When you hover over an island in the list, the corresponding geometry highlights blue in the graphics window.
Regardless of how many volumes are created, the system prompts you to name each one. You can determine the volume to be created by shading it. The system hides all the other volumes at this time, and creates a mold volume with the name you specify.
Creating Intermediate Mold Volumes
Depending on the mold model and its complexity, not every mold volume created will be used to create a final solid mold component. It may be
necessary to create “intermediate”, or temporary mold volumes during splitting operations. For example, if you split the workpiece into the core and cavity volumes, but the core volume must further be split to remove a slider volume, you create an intermediate core volume.
Mold Volume Splitting Guidelines
Consider the following guidelines when splitting mold volumes:
• When you split a volume by a parting surface, the volume is split at the parting surface and either one or two volumes are created in place of the original volume.
• When you split a volume by another volume, the original volumes are not modified. Rather, the original volumes are copied and then split. For example, if you use the Mold Volume, Two Volumes option and split mold volume A using mold volume B, there will be a total of four mold volumes after the split: original volumes A and B, and new volumes C and D. One of the new mold volumes C or D will be identical to the splitting mold volume B.
As a result, you should use the One Volume option when splitting by a mold volume. This way, when you split mold volume A with mold volume B, you end up with a total of three mold volumes: original volumes A and B, and new volume C. New volume C is equivalent to volume A minus volume B.
Using the One Volume option avoids redundant volumes and keeps the number of mold volume features down in the model tree.
• When you split the mold volume by a parting surface, the parting surface must completely intersect the mold volume.
• Name all resultant mold volumes appropriately, as this will help you determine which mold volumes to create solid mold components from later on. For example, if a mold volume is used as an intermediate mold volume, name it “temp_mold_vol1”, or something similar so you know later on that it will not be used to create a solid mold component.