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Temperature Profile in Rubber Injection Molding: Application of a Recently Developed Testing Method to Improve the
Martin Traintinger1, Roman Christopher Kerschbaumer1, Bernhard Lechner1
1Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700 Leoben, Austria.
Polymers
|February 3, 2021
Summary
Accurate rubber injection molding simulations require precise material inlet temperature data. Applying the actual mass temperature profile significantly improves simulation accuracy for process optimization and failure analysis.
Area of Science:
- Polymer Engineering
- Materials Science
- Manufacturing Processes
Background:
- Injection molding is a sophisticated rubber processing technique.
- Simulation software aids in optimizing conditions and identifying failure scenarios.
- Accurate numerical modeling requires careful consideration of process variables.
Purpose of the Study:
- To compare rubber injection molding process simulations using different definitions of material inlet temperature.
- To evaluate the impact of precise mass temperature profiles on simulation accuracy.
- To verify simulation results with practical experiments.
Main Methods:
- Developed a unique test stand to determine the axial mass temperature profile before injection.
- Conducted rubber injection molding experiments for simulation verification.
- Mechanically characterized molded parts and normalized results to a relative degree of cure.
Main Results:
- Simulations incorporating the actual mass temperature profile showed excellent correlation with measured cold runner temperatures.
- The relative degree of cure in simulations more closely matched experimental results when the post-dosing mass temperature profile was applied.
- Different inlet temperature definitions significantly impacted simulation outcomes.
Conclusions:
- Precise definition of the material's inlet temperature is crucial for accurate rubber injection molding simulations.
- Utilizing an experimentally determined mass temperature profile enhances simulation reliability.
- This approach aids in optimizing rubber injection molding processes and reducing resource expenditure.
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