TUTORIAL [Artificially Balanced RuOverview
Introduction:
This tutorial shows you how to create and analyze a 2-plate mold which contains two different cavities (a family mold). There are eight tasks in this tutorial.
Task List
1. Prepare the first model
2. Prepare the second model
3. Set the mold dimensions
4. Runner system parameters
5. Generate runner system
6. Change runner dimensions
7. Set processing conditions
8. Tutorial overview
Task 1: Set up the model
In this task you will prepare the model for analysis.
Before you start, set the units to Metric so the dimensions will be shown in millimeters.
|
1. Click File 2. In the Family & Multi-Cavity Solution section, select Coarse. 3. Click OK to close the Preferences dialog. 4. Click 5. Click Open to continue. 6. Set the polymer injection location |
You have completed this task. Move on to the next task: Copy the cavity.
Task 2: Copy the cavity
| ||
|
|
In this task you will duplicate the model to create a six cavity layout. To work with multiple copies of a model, the analysis mode must be set to Multi Cavity.
|
1. Select Multi Cavity from the Analysis Mode 2. Click 3. Enter 6 as the Number of Cavities. 4. Select grid as the Layout Type. 5. Enter 10 mm as the column separation and 60 mm as the row separation. 6. Ensure Cavity Edge to Cavity Edge is selected for both column and row separation. 7. Click OK. |
A multiple cavity layout has two or more copies of the same model. The Adviser allows you to automatically arrange the models in a single row, a grid, or a circle.
Once you have duplicated the model, it should be arranged like this:
Error! Not a valid embedded object.
Check your understanding
To duplicate models, you must select Multi Cavity. From which drop-down list should you do this?
You have completed this task. Move on to the next task: Set the parting plane.
Task 3: Set the parting plane
In this task you will set the location of the parting plane.
|
1. Click 2. Click Top to move the parting plane to the top of the cavity. 3. Click OK. |
The parting plane is the plane between the A-plate and B-plate. It is always parallel to the X-Y plane, and the sprue location is always on the positive side of the parting plane. This means that you need to have the part oriented correctly before you create the mold or feed system. To help with model orientation, make sure Display Labeled Mold is selected in File
You have completed this task. Move on to the next task: Set the mold dimensions.
Error! Not a valid embedded object.
Task 4: Set the mold dimensions
In this task you will set the plate thickness and the mold length and width.
|
1. Click 2. Ensure the Floating (3 Plate) check box is not selected. 3. Enter the following plate thicknesses: · A-plate: 40 mm · B-plate: 56 mm 4. Set the length and width of the mold: · X: 275 mm · Y: 275 mm 5. Click OK. |
You have completed this task. Move on to the next task: Set the runner system parameters.
Task 5: Set the runner system parameters
In this task you will set the runner system defaults required by the mold.
|
1. Click 2. Click the Runners tab, and make these selections: · Runner Type: Cold runner. · Runner Shape: · Diameter (1): 6 mm. 3. Click Size/Balance Constraints, select Free from the Diameter (1) section, and then click OK. 4. Click the Gates tab, and make these selections: · Gate type: · Start Diameter (1): 3.5 mm. · End Diameter (2): 2 mm. 5. In the Gate length and rotation section, do the following: · Select Set horizontal length manually. · Set the Horizontal Length (L) to 10 mm. 6. Click the Sprue tab, and make these selections: · Sprue Type: Cold Sprue. · Shape: · Start Diameter (1): 5 mm. · End Diameter (2): 6 mm. 7. Click OK. |
When you set the default parameters for the runners, use the Size/Balance Constraints feature to indicate how the runners will be balanced . There are three options:
Fixed (the default) - Runners created will not be changed when you perform a Runner Balance analysis.
Free - The Runner Balance analysis will change the runners to the sizes required to balance the runners, while staying as close as possible to the original runner dimensions.
Range - You can set a maximum and minimum value for the dimensions of the runners.
Note: Any runner system sections you create after changing the runner, gate, or sprue defaults will have the new dimensions. Sections already created will not change.
You have completed this task. Move on to the next task: Set the sprue location.
Task 6: Set the sprue location
| ||
|
|
In this task you will set the sprue location and create the sprue and gates.
|
1. Click 2. Click Middle of Mold to set the sprue location. 3. Click OK. 4. In the Runner Generation dialog select Generate Sprue And Gates. 5. Click OK. |
You have completed this task. Move on to the next task: Create runners.
Task 7: Create runners
In this task you will create the runners that connect the gates from each model to the sprue.
|
1. Click 2. To improve visibility of the runners and gates, hide the: · Cavities: · Mold Outline: · Injection Cones: 3. Click 4. Click 5. To create a connecting runner between the two gates on the left: . Move the mouse over the bottom left gate. The square which appears over the gate shows you where the runner will start from. a. Click to create the start of the runner. b. Move the mouse over the top left gate. Again, a square appears to show you where the runner will finish. c. Click to end the runner. d. In the Runner Creation dialog, select Turn Off Continuous Runners. 6. To create the right connecting runner: . Click on the bottom right gate, to start the runner. a. Click on the top right gate, to finish the runner. 7. To create the central runner: . In the Runner Creation dialog, uncheck Turn Off Continuous Runners. a. Click on the bottom middle gate to start the runner. b. Move the mouse over the base of the sprue. A square appears to show you where the runner will connect to the sprue. c. Click to connect the runner to the base of the sprue. d. Move the mouse over the top middle gate, and when the square appears, click to finish the second runner. e. Click OK to close the Runner Creation dialog. |
Your model should now look like this:
You have completed this task. Move on to the next task: Create the other runners.
Task 8: Create other runners
In this task you will finish the runner design by linking the runners.
|
1. Click 2. Click the Runners tab, and change the Size/Balance Constraints to Fixed. 3. Click OK to close the Automatic Size/Balance Constraints dialog, and then click OK on the Runner System Defaults dialog. 4. Click 5. Move the mouse over the mid-point of the left runner. A square appears to show you where the new runner will start. 6. Click to create the start of the runner. 7. Move the mouse over the base of the sprue. Again, a square appears to show you where the runner will connect to the sprue. 8. Click to complete the first half of the runner. 9. Move the mouse over the mid-point of the right runner. Again, a square appears to show you where the runner will finish. 10. Click to complete the second half of the runner. 11. Click OK. 12. Click 13. Select File |
You have created a runner system for the six cavities. The runners are not balanced, since the polymer will fill the two central cavities before they fill the outer cavities. In the next task, you will balance the runners so that all cavities fill at the same time.
You have completed this task. Move on to the next task: Balance the runners.
Task 9: Balance runners
| ||
|
| ||
|
|
In this task you will balance the runner system.
|
1. Click 2. Select Runner Balance analysis, and then click Next. The Analysis Resolution page is displayed. 3. Click Next. 4. In the Select Material page, select Specific Material, and then select the following material: · Manufacturer: Cheil Industries Incorporated. · Trade name: HG 0760. 5. Click Next. 6. In the Processing Conditions page, set Maximum machine injection pressure to 150 MPa. 7. Click Finish to launch the analysis. 8. Click OK if a Solver dialog appears. 9. When the Result Summary dialog appears, click Apply Changes. 10. Click No, if you are prompted to save the model. |
On the Results Summary dialog, the Runner Balance page has two options:
Review Changes - View and apply each change individually. If you don't wish to apply a change, click Next instead of Apply.
Apply Changes - Accept all of the changes.
You have completed this task. Move on to the next task: Tutorial overview.
Task 10: Tutorial overview
In this tutorial you have created a balanced runner system for a six-cavity mold. After completing this tutorial you should be able to:
Duplicate models.
Set the parting plane.
Set the dimensions for a mold.
Set the runner system defaults.
Automatically generate the gates and sprue.
Create runners manually.
Balance a runner system.
