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3. Use of numerical calculation techniques
To anticipate these problems and optimize productivity right from the mold design stage, it is necessary to know the flow characteristics of the plastic material in the feeder and in the cavities. The transient nature of flow and heat transfer, and the generally three-dimensional geometry of cavities, make rheological calculations complex. In addition, shear on the one hand, and cooling in contact with the cavity on the other, modify the material's characteristics during filling.
Rheological and thermal calculation software (e.g. Simpoe-Mold, Cadmould® or Modflow, Moldex 3D, etc.) provide good approximations of filling dynamics. The reliability of results depends on cavity meshing, modeling of plastic characteristics (rheological behavior law) and boundary conditions, particularly thermal, which requires a thorough understanding of process data (temperature, flow...
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Use of numerical calculation techniques
Effect of polymer physical properties on the injection cycle
Bibliography
Software tools
Cadmould®
Autodesk Moldflow
https://www.autodesk.fr/products/moldflow/overview
Simpoe-Mold
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Standards and norms
- Moulding tools – Compression molding components, injection molds and diecasting molds – Terms and symbols. - NF ISO 12165 - Avril 2020
- Moulding tools – Thermal insulation foils in injection molds. - NF ISO 15600 - Avril 2001
- Moulding tools – Tool specification form for injection molds. - NF ISO 16916 - Mai 2016
- Compression molding and injection molds – Components for injection systems. - NF ISO 28238...
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