Runners are channels through which molten material flows from the sprue to the gates to fill a mold cavity. By
definition, a runner is created between two plates. It can cut one of the plates or both of them.
This process begins with a user sketch of the runners and ends with the mold being cut by the runners
Unpack the file: MD_runner.ctf
Open the assembly: MD_MD.elt.
From Mold Design guide, click the Runner Design icon, select the Pattern Sketch icon
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Select the plane as indicated in the picture.
The Runner part has been created under the main assembly, and it is automatically activated.
Create the following sketch.
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Copy the sketch
Create an axis defined by the hole indicated by the arrow in the picture.
Copy the sketch – Radial ; Counter = 3
You may use a mixture of lines and sketches as input for the runner body.
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Select the Runner Bodies icon.
Select the three sketches and exit.
The Runner Cross Section dialog is displayed.
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Select the cross section as indicated in the picture. The numeric fields are now available.
Enter the desired size for the cross-section elements
examine the resulted runner body (according the parameters you have set).
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Note that you can use your own defined cross section by pressing the "Other Cross section” button .
Then select any 2d -closed sketch from the display area as the cross section.
Local cross section
Set a local cross section. Select the icon in the dialog, than select the segment indicated in the picture.
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Set different values to the cross section. Click the picture button to display the picture of the cross section
and its parameters.
Note that local section is marked in blue circle while general section is marked in blue cross.
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Jump back to the previous step. Change the option Flat End to Revolve End.
Merge the six bodies into one body.
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Cut by Runner
Cut the mold components with the runner body.
Select the Cut by Runner icon.
Note that the main assembly is automatically activated.
Select the K20 of the movable side as the object to be cut.
Select the merge runner body as the cutting object
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Select OK. Hide the runner body to display the runner in the movable side.
This runner is cut only the movable side, there maybe other runner sections that both sides should be cut.
You may complete the exercise by cutting the Sprue bushing and adding gates.
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