Moldex3D simulation of the filling stage can now incorporate the suck back behaviors in its barrel analysis. Thus, the filling time, screw position, and injection volume can be more accurately predicted.
- Only Injection Molding (IM) process is supported.
- The suck back setting is only supported in the machine mode through the real machine interface.
- The attributions of the nozzle and metering zone need to be set as “Nozzle Zone”.
- The suck back simulation is not supported in the model with the “Hot Runner” attributions.
Step 1: Model preparation
After launching Moldex3D Studio (2021), create or import a mesh model containing the part, cold runner, cooling system, and nozzle zone.
Step 2: Machine mode settings and machine selectionSelect “Machine Mode” after opening the Process Wizard, select “New” in the machine settings, and select an injection machine in the machine database.
Note: When selecting a machine, please note that if the real machine interface is supported or not. (Currently, more than 20 machines are supported.)
Step 3: Suck back settings1. After selecting an injection machine with a machine interface supported, check the “Machine Interface” and select the controller type, and then click “Next” to display the real machine interface.
2. Find the suck back parameters in the machine interface and input its suck back distance or volume.
Step 4: Result1. Screw position vs. injection pressureAs shown in the figure below, without considering the suck back (the green line), the injection pressure will rise because the mold is filled, but the screw has not reached the VP switching point. When the suck back behavior is considered (blue line), the pressure and VP position results are much closer to the experiment.
2. Flow patternsWhen the VP position reaches 80mm and 50mm, compared with the experiment, it can also be observed that the simulated flow front is closer to the experiment when the suck back behaviors are considered.
Try Moldex3D software, with a trial download request.