Moldflow

TUTORIAL [Cooling Circuit Adviser

TUTORIAL

[Cooling Circuit Adviser]

Introduction:

This tutorial demonstrates how you can use the Cooling Circuit Adviser functionality in Mold Adviser to:

         Model a cooling system.

         Specify cooling system parameters, for example the type of coolant and the coolant temperature and flow rate, and then run a Cooling Circuit Adviser analysis.

         Assess the effectiveness of the cooling system based on the analysis results.

Task List

1.     Model cooling channels

2.     Set up and run Cooling Circuit Adviser analysis

3.     View and interpret results

4.     Model baffles and reanalyze

5.     Alternate modeling techniques

6.     Tutorial overview

Task 1: Model cooling channels

In this task, you will model a cooling system for the supplied electrical box part, as shown below:

1. Click (File Open) and select the ptype (*.adv)( D:\Program Files\Moldflow\Plastics Advisers 7.3\tutorial ).

2. Click OK to continue.

3. Ensure Single Cavity is selected as the analysis mode is.

Note: Cooling modeling tools are not available if the analysis mode is set to Part Only.

4. Click File Preferences, click to select the Display Grid Settings page, and then:

· Select Display modeling grid

· Select Snap to grid

· Select Center grid on sprue

· Deselect Clip grid to mold region

· Enter 10 (mm) in the Grid size text box

· Click OK to close the dialog.

5. Click View Toolbars View Point to display a toolbar with useful model rotation commands.

6. Click View Toolbars Cooling System to display a toolbar with model cooling tools.

7. Click (Display Visible Entities Mold Outline) to display the mold blocks.

8. Click (Display Fit to Window) to fit the entire model on the screen.

9. Click (Display Display Origin) to display the location with coordinates (0,0,0).

10. Click (Adviser Cooling System Tools Cooling System Defaults), and then select Circular Channel from the Channel type options.

11. Set the Diameter value to 8 mm and then click OK.

You will now use the cooling planes functionality available from the Cooling System toolbar and the Adviser menu to finish modeling the cooling system shown above. Cooling planes always lie on the XY plane and are defined by entering a name and Z axis value.

12. Click (Adviser Cooling System Tools Add Cooling Plane) to display the Add Cooling Plane dialog, then

· Enter Top plane in the Name text box.

· Enter 20 in the Z text box .

· Click Apply to preview the cooling plane location.

· Click OK to close the dialog.

You will now model the cooling line in the A-plate.

13. Click (Front View) to look down on the model from the positive Z axis.

14. Ensure Top plane is selected in the Cooling Plane drop-down list on the Cooling System toolbar, then click (Adviser Cooling System Tools Add Cooling Channel).

15. Move the cursor 2 grid lines horizontally to the right and 10 grid lines vertically down from the sprue, and then left click.

The Cooling Channel Creation dialog opens and the coordinates should read X:25.00, Y:-100.00, Z:20.00. If this is not the case, click Cancel and repeat this step.

16. Ensure that the Relative position option is deselected, then:

· Change Y to 100, and then click Apply.

· Change X to -25, and then click Apply.

· Change Y to -100, and then click Apply.

· Click OK to close the dialog.

You should now see the cooling line shown above. Notice that the sections of the cooling channel that lie outside the mold boundary are displayed in a different color. These sections have automatically been assigned the property Hose and will not be taken into account in the heat transfer calculations as they are not involved in cooling the part.

Note: The two side channels are modeled on the middle cooling plane and the straight channel is modeled on the bottom plane.

17. Click File Save As and save the model as ptype_cooling.

You have completed this task. Click the right arrow below to move on to the next task.

Task 2: Set up and run Cooling Circuit Adviser analysis

In this task, you will set up and run a Cooling Circuit Adviser analysis for the model and cooling system you created in the previous task.

Assigning coolant inlet properties

In the previous task you created a cooling system consisting of four individual cooling circuits. You will now assign a coolant inlet, and associated properties, to one end of each circuit.

1. Rotate the model into the orientation shown above.

2. Click (Display Select) and select the end of the circuit at the location labeled 1 in the image above.
You should see a red wireframe box surrounding the end of the circuit.

3. Right-click and select Properties.
The Cooling End-Point dialog appears. This dialog is divided into two sections; the left hand side specifies the global X, Y and Z coordinates of the end of the circuit, and the right hand side allows you to specify that this is the inlet side of the circuit, and to specify the required coolant properties.

4. Select the Coolant Inlet option, then set the following coolant inlet properties:

Flow rate:	5 l/min (1.32 gal/min)
Inlet temperature:	65°C (149°F)
Coolant:	Water (pure)

6. Note: Typically the coolant inlet temperature would be in the range 10 - 25°C (50 - 77°F). In this example however, the coolant temperature needs to be quite high because the part will be molded from a glass-fiber reinforced nylon.

7. Click OK to apply the properties and close the dialog.

8. Repeat steps 2 to 5 and apply the same coolant inlet properties to the other three inlets labeled 2 - 4 in the image above.

9. Click (File Save) to save the changes you have made.

10. Click (Adviser Analysis Wizard) and select the analysis Cooling Circuit Adviser (Part+Mold+Circuits).

11. Click Next twice to advance to the Select Material page of the Analysis Wizard.

12. Select Specific Material, then select the following material:

· Manufacturer: Rhodia Engineering Plastics.

· Trade name: Technyl A 218 V30 Natural (REP and MF tested).

13. Click Details to review the properties of the glass-reinforced nylon material. Note in particular the high mold and melt temperature recommendations on the Recommended Processing tab. When you have completed the review, click OK to close the Thermoplastics material dialog.

14. Click Next to proceed to the Processing Conditions.
Accept the default processing conditions, including the clamp open time of 3 sec which will be used in the calculation of the part cycle time.

15. Click Next to proceed to the Advanced Processing Conditions page.

16. In the Injection+Packing+Cooling time options, deselect Automatic cycle time and enter a value of 10 sec.

17. Click Finish to launch the analysis.

18. Click OK if a Solver dialog appears.

The analysis may take several minutes to run. Please click the right arrow below to continue to the next task where we begin with a brief overview of the available Cooling Circuit Adviser results.

Task 3: View and interpret results

In this task, you will assess the effectiveness of the cooling system you have modeled for the electrical box. Click on a triangle to see a description of the result:

Circuit Reynolds

Circuit Coolant Temperature

Part Surface Temperatur

When the Cooling Circuit Adviser analysis is complete, and the Results Summary dialog is displayed, continue to view and analyze the results.

1. Review the summary information on the Cooling Analysis page of the Results Summary dialog.
The very high Maximum cavity temperature value immediately suggests that there are cooling problems with this model.

2. Click Close to close the Results Summary dialog, and then select Circuit Reynolds Number in the Result Types drop-down menu.
The coolant flow rate in all circuits is acceptable because a Reynolds Number well above the minimum recommended value of 10,000 has been achieved.

3. Now select Circuit Coolant Temperature.
The temperature rise along the circuits is well under 1°C/2°F which confirms that the cooling circuits are performing efficiently.

4. Select Part Surface Temperature.
This plot shows a large variation in surface temperatures throughout the part. If you rotate the model you will see that the highest temperatures are associated with the long bosses and the innner surfaces.

Tip: Use the Set Scaling command in the Results menu to scale the result from a minimum of about 75°C (212°F) to a figure close to maximum, to help locate the hot areas.

5. Click (File Save) to save the model and results.

The results show that the cooling circuits are performing efficiently, but the layout of the cooling circuits is not providing sufficient heat extraction to cool the bosses and inside surfaces in the same time as the rest of the part. In the next task, you will model two baffles to try to improve the cooling of this part.

You have completed this task. Click the right arrow below to move on to the next task.

Task 4: Model baffles and reanalyze

In this task, you will attach two baffles to the B-Plate cooling line, as shown below, in order to improve the cooling near the long bosses and inside the model.

1. Click (Back View) to display the model from the negative Z axis direction.

2. On the Cooling System toolbar, ensure Bottom plane is selected in the Cooling Plane drop-down list.

3. Click (Adviser Cooling System Tools Move Cooling Channel), locate the cursor at the hose-channel junction indicated by the location 1 below, press and hold down the left mouse button, then drag the selection to the location 2 (1 grid line to the right of previous grid line position, 2 grid lines up from the bottom edge of the model). Repeat this procedure to drag the junction at location 3 to the location 4 (1 grid line to the right of the previous grid line position, 2 grid lines down from the top edge of the model).

The cooling channel now has three segments inside the mold. The locations 2 and 4 will serve as attachment points for the baffles. You will now straighten up the cooling channel by adjusting the coordinates of the locations 2 and 4.

4. Click (Display Select) to exit dynamic channel editing mode and activate the Select tool.

5. Click on location 2, as shown in the image above, and then right-click and select Properties.

6. Change the value in the X text box to -1mm, and then click OK.

7. Repeat the same coordinate change for location 4, as shown in the image above.

Note: This moves location 2 and 4 closer to the two bosses and will better cool them when the baffles are created.

8. Click (Adviser Cooling System Tools Add Cooling Channel), click on location 2, and the Cooling Channel Creation dialog appears.

9. Select Relative position from the dialog, and then enter 35 in the Z text box.

10. Click OK to close the dialog.

11. Rotate the model so that you can see the cooling channel segment you have just created.

12. Click (Display Select), and then select the new channel segment.

13. Right-click and select Properties, and then select the Baffle channel type.

14. Enter a diameter of 8mm, and then click OK to close the dialog.

15. Click (Back View) and repeat these steps to create an equivalent baffle of length 35 mm and diameter 8 mm at location 4.

16. Set a coolant inlet at one end of the channel you have just edited.

17. After verifying the modeling changes you have made, click File Save As and save the model as ptype_cooling_baffles.
You will now use the same processing conditions as the previous analysis to perform a cooling analysis.

18. Click (Adviser Analysis Wizard), select the analysis Cooling Circuit Adviser (Part+Mold+Circuits), then click Finish to launch an analysis with the same inputs as previously used.

19. Click OK if a Solver dialog appears.

20. Once the analysis is complete, review the Cooling Circuit Adviser analysis results to assess the impact of the baffles you have added to the cooling system.

You have completed this task. Click the right arrow below to move on to the next task.

Task 5: Alternate modeling techniques

In this task, two alternative methods for generating cooling circuits are demonstrated:

How to create a basic Cooling Circuit layout from the Cooling Circuit Wizard.

How to create a Cooling Circuit layout from an imported IGES file.

Creating a basic Cooling Circuit layout from the Cooling Circuit Wizard

The Cooling Circuit Wizard enables you to create a basic cooling circuit layout with a single mouse click. You can then use the standard modeling tools to adjust the placement of the cooling lines and make other adjustments or additions, as demonstrated below.

1. Click (File Save) to save the current model and results.

2. Click (File Open) and open the ptype.adv model again.

3. Click (Display Visible Entities Mold Outline) to display the mold blocks.

4. Rotate the model so that you can see all the features.

5. Click (Display Fit to Window) to fit the entire model on the screen.

6. Click (Adviser Cooling System Tools Cooling System Wizard) to open the Cooling System Wizard dialog.

7. Change the Channel diameter value to 6 mm and click Next.

8. Change the Number of Channels value to 3 and the Distance to extend beyound mold to 20 then click Finish.

Note: The wizard does not check for the location of the sprue when positioning the cooling lines. You can however use the standard modeling tools to easily move the cooling line to one side.

9. Click (Display Select), and select the intersection labeled 1 in the image above.

10. Right-click and select Properties.

11. Change the Y value to -6 mm and click OK.

12. Repeat steps 9-11 for the other three intersections shown in the image above.

13. Rotate the model to confirm that the cooling line now no longer interferes with the sprue.

14. Click File Save As and save the model as ptype_wizard.

Importing a layout saved as an IGES file

Moldflow Mold Adviser allows you to import an IGES file saved as curve (line) entities, in a 3rd party CAD package, as a cooling line layout.

1. Click (File Open) and open the ptype.adv model.

2. Click (Display Visible Entities Mold Outline) to display the mold blocks.

3. Rotate the model so that you can see all the features.

4. Click (Display Fit to Window) to fit the entire model on screen.

5. Click (Adviser Cooling System Tools Import Cooling System), change the Files of type setting to IGES Cooling Circuit Files (*.igs) and then open the ptype_cooling (*.igs) file in the tutorial folder.

6. Rotate the model to confirm that the cooling line layout has been successfully imported.

You have completed this task. Click the right arrow below to move on to the next task.

Task 6: Tutorial overview

In this tutorial, you learnt how to:

Model cooling channels.

Run a Cooling Circuit Adviser analysis.

Interpret cooling results.

Model baffles.

Modify cooling channels.

Congratulations! You have completed all of the tasks in this tutorial. Click here to return to the course map and proceed with another tutorial.

+ نوشته شده در Mon 1 Oct 2007ساعت 19:24 توسط sohrabi |

TUTORIAL [Cooling Circuit Adviser

TUTORIAL

[Cooling Circuit Adviser]

Introduction:

This tutorial demonstrates how you can use the Cooling Circuit Adviser functionality in Mold Adviser to:

Model a cooling system.

Specify cooling system parameters, for example the type of coolant and the coolant temperature and flow rate, and then run a Cooling Circuit Adviser analysis.

Assess the effectiveness of the cooling system based on the analysis results.

Task List

Task List

1. Model cooling channels

2. Set up and run Cooling Circuit Adviser analysis

3. View and interpret results

4. Model baffles and reanalyze

5. Alternate modeling techniques

6. Tutorial overview

Task 1: Model cooling channels

Task 2: Set up and run Cooling Circuit Adviser analysis

Assigning coolant inlet properties

Task 3: View and interpret results

Task 4: Model baffles and reanalyze

Task 5: Alternate modeling techniques

Creating a basic Cooling Circuit layout from the Cooling Circuit Wizard

Importing a layout saved as an IGES file

Task 6: Tutorial overview

نوشته های پیشین

آرشیو موضوعی

پیوندها

Moldflow

TUTORIAL [Cooling Circuit Adviser

TUTORIAL

[Cooling Circuit Adviser]

Introduction:

This tutorial demonstrates how you can use the Cooling Circuit Adviser functionality in Mold Adviser to:

Model a cooling system.

Specify cooling system parameters, for example the type of coolant and the coolant temperature and flow rate, and then run a Cooling Circuit Adviser analysis.

Assess the effectiveness of the cooling system based on the analysis results.

makeTutorialTaskList(); makeTutorialTaskList(); Task List

makeTutorialTaskList();

Task List

1. Model cooling channels

2. Set up and run Cooling Circuit Adviser analysis

3. View and interpret results

4. Model baffles and reanalyze

5. Alternate modeling techniques

6. Tutorial overview

Task 1: Model cooling channels

Task 2: Set up and run Cooling Circuit Adviser analysis

Assigning coolant inlet properties

Task 3: View and interpret results

Task 4: Model baffles and reanalyze

Task 5: Alternate modeling techniques

Creating a basic Cooling Circuit layout from the Cooling Circuit Wizard

Importing a layout saved as an IGES file

Task 6: Tutorial overview

نوشته های پیشین

آرشیو موضوعی

پیوندها

Task List