Two-Shot overmolding

This tutorial familiarizes you with the setup of the two-shot overmolding process, and helps you to review key results. It is expected that you understand the two-shot overmolding process.

Tutorial duration: Approximately 50 minutes.

Note: This topic assumes that you are following simulation best practices, and that you are confident your model is ready for a two-shot overmolding analysis. This means that you have already imported and run a thermoplastics injection molding analysis on each part separately to confirm that the components fill. You have imported the assembly of both components, generated and checked the quality of the mesh, and created the runner systems for each shot, or component.

In this tutorial you learn how to:

Note: A Cool (FEM) analysis is outside the scope of this tutorial.

Pre-requisites:

Use the sdy file provided, to learn how to set up the two-shot simulation on a ready-to-go model. To complete this tutorial using your own model, you need to know how to:

The figure above shows the Re-melt zone plot, which is an important result from an overmolding analysis. You will review this result later.

To begin, click here to download the model files for the this tutorial. Extract the files for tankcoverwseal_runners part 2.zip into the same folder that you extracted tankcoverwseal_runners part 1.zip into.

Tasks list

  1. Select the molding process
    In this task, you select the molding process and the analysis sequence, steps necessary to run a two-shot overmolding analysis.
  2. Assign properties to the second shot component elements
    In this task you specify the properties necessary to run a two-shot overmolding analysis.
  3. Setup the two-shot overmolding process
    In this task you first select the materials to use, and then setup the process settings that are characteristic of a two-shot overmolding process.
  4. Review Fill time of the two-shot overmolding process
    In this task you review the Fill time of the two-shot overmolding process. The overmolded component has the same results as the first shot has in a typical Fill + Pack + Warp analysis.
  5. Review Time to reach ejection temperature of the two-shot overmolding process
    In this task you review the Time to reach ejection temperature and the Time to reach ejection temperature (overmolding) results.
  6. Review Temperature of the two-shot overmolding process
    In this task you review the Temperature and Temperature (overmolding) results.
  7. Review the Re-melt zone, overmolded components (overmolding) result
    In this task you review the Re-melt zone, overmolded components (overmolding) result.
  8. Review deflection results of the two-shot overmolding process
    In this task you review the deflection result. We'll assume that the seal must be flat within 0.5 mm. Determine if the part is within tolerance. Look at other results to see the influence of the overmolding.
  9. Tutorial review
    This tutorial has given you an overview of the two-shot overmolding process analysis.
Parent topic: Advanced concept tutorials