Different types of mold fill analyses can be performed on plastic parts to determine many things. The different types include:
Fill & Hold Analysis – This analysis is performed on a molding process to ensure that the cavity will fill properly with no voids, that flow fronts will meet in desired locations and will weld properly, and that the process can be accomplished within the desired cycle time and within the capacity of the molding machine. Results are typically presented in the form of either avi (windows movie) files or jpg graphic files depending on appropriateness. If bad analysis results are shown, designers can alter their design process before steel is cut thus eliminating re-work.
Shape Analysis – This analysis begins at unclamp time and considers the part following ejection as it completes its cooling process and the part geometry stabilizes. Analysis emphasis is on shrinkage and warpage. Deliverables for this type of analysis take two forms –
- A final part model in STL file format reflecting shrinkage and Warpage.
- A dual part model where two superimposed models show the original mold cavity (theoretically the “as-designed” part) and the resulting part (after shrinkage and warpage have occurred).
Thermal Analysis – This analysis is done to confirm that a mold’s cooling system is sufficient to maintain the proper mold operating temperature for producing good parts. Consideration is given to factors such as waterline location, water temperature, and heat dissipating inserts.
Process Verification – This analysis is typically performed on jobs that are already in production. It is used to verify that an analysis model does produce correct analysis results as verified by the actual process. Once a process model is verified, accurate results for prospective process model alterations can be determined.
