B-SIM V2.5 Reference - Blow molding simulation
Example 4: Injection blow molding
Creating tool representation
In this example there is just one tool - mold. It is represented by B-SIM tool and it is quite complicated so there is no easy way to create it. CAD software (SurfCam, SolidWorks, Catia, Pro-Engineeg etc.) must be used. Once the tool is created in CAD, its STL representation can be directly imported into B-SIM.
To import STL (or DXF, Patran) tool representation into B-SIM, click New Tool on B-SIM shortcuts bar. Select format used by imported file and click OK. Now browse for the file and then click Open. The tool is automatically imported. After import click File / Save and save the imported tool into B-SIM format.
The tool used in this example is delivered with B-SIM (\Kafemlejn\kafemlejnek.tol). STL file is not distributed with B-SIM.
In this example the preform shape is not simple. It is necessary to create the preform using an external file with B-SIM preform template.
To create the preform using B-SIM template file in B-SIM, just click on New Grid on B-SIM shortcuts bar. Create preform / parison from template dialog appears. Check Preform from template file. File open dialog appears. Browse for the template file (template file Kafe.btp is delivered with B-SIM in the directory \Kafemlejn) and click Open. The following window with the new preform created appears on the screen:
Click File / Save and specify a filename (PreformRef0.bcs).
Template file description
The first line contains number of elements, symmetry and (-1). The following lines contain y, z coordinates, thickness (mm) and temperature (°C).
Data were generated using a CAD software. They define 2D curve to be
revolved around z axis.
In this case the tool (mold) does not move. Only a pressure is applied to inflate the preform into the mold cavity.
Click New Process Control on B-SIM shortcuts bar. Fill in the table with the following time and pressure values:
The mold is represented by Tool 1, behaving as external. For more information about tool behavior, see Reference - Tool behavior.
Click File / Save and specify a file name for the process control data (Process.pct).
MatBlow.vie is used in this example. Data of this material are stored in the B-SIM material file MatBlow.vie.
Heat and friction
Click New Heat & friction on B-SIM shortcuts bar. Fill in the dialog with the following values:
Tool 1 temperature: 50C
Air temperature: 25C
Click Apply changes to tool data.
Click File / Save and specify a file name (Heat.hfr).
Setting up a project
To set up a project click New Project on B-SIM shortcuts bar.
Use Browse buttons to select:
Specify more details about this project in Additional information (optional).
Click File /Save to save the new project. Specify the project name (Project0.tff). When the project is saved, click Project / Solve to start the project simulation. Within short time the project is solved and you can view results in post processing - just click on Project / Open for post-processing. To learn more about post processing please use B-SIM context sensitive help - press F1 in B-SIM post processing window.