Recent changes in legislation along with environmental initiatives to drive sustainability and reduce carbon emissions have sprouted the development of energy models to characterize manufacturing processes. In the case of injection molding, much work has been performed in coupling sensors with control statistical systems to promptly identify process' instabilities, such as pressure drops or fluctuations in the filling point. Latest energy models for injection molding make use of injection pressure and temperature parameters that are a function of the machine, mold geometry, and process characteristics. The latest state-of-the-art way to measure energy consumption is through the use of energy loggers, which provide power data at the end of the production cycles. Although seemingly correlated, little has been published on the extrapolation of cavity signals for their use in energy calculations. In this study, the advantages and disadvantages of using cavity sensors in injection molding are explored; a novel approach to the use of cavity sensors' pressure and temperature data is proposed by exploring their input in an energy model for the estimation of specific energy consumption (SEC). The model was validated against power data obtained via an energy logger; the averaged energy reported by the model indicated a range of 60–67% accuracy.
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March 2018
Research-Article
Characterizing Energy Consumption in Injection Molding: Model Versus Logger
Julien Loste
Julien Loste
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Andrea Sánchez-Valencia
Julien Loste
1Corresponding author.
Manuscript received June 28, 2017; final manuscript received October 16, 2017; published online January 3, 2018. Assoc. Editor: Karl R. Haapala.
J. Manuf. Sci. Eng. Mar 2018, 140(3): 031013 (10 pages)
Published Online: January 3, 2018
Article history
Received:
June 28, 2017
Revised:
October 16, 2017
Citation
Sánchez-Valencia, A., and Loste, J. (January 3, 2018). "Characterizing Energy Consumption in Injection Molding: Model Versus Logger." ASME. J. Manuf. Sci. Eng. March 2018; 140(3): 031013. https://doi.org/10.1115/1.4038294
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