Effect of the cooling temperature of a <scp>PET</scp> sheet on the crystallinity and mould removal time for thermoforming applications

Predicting heat transfer mechanisms through solids and fluids is a continuously demanding research topic since accurate and fast temperature calculation is crucial in many engineering and industrial applications. The paper presents a new model to calculate the temperature variation of solids and fluids instantly, in less than 0.04 s, for the whole simulation period based on a novel computational framework of deep learning. The partial differential equation, such as the heat transfer equation, can be solved directly at any point according to a well-known boundary condition point without the need for domain discretization. Therefore, instant and accurate temperature calculation is achieved with the minimum computational resources. The proposed deep learning model can be applied in many engineering applications and products by using it in online thermal monitoring or digital twin technology. The new model is well validated by comparing the temperature values obtained from the deep learning model with the experimental temperature measurements. Moreover, a computational cost comparison with other numerical models is conducted to prove the high efficiency of the proposed deep learning model, where MATLAB is utilized to develop the required codes.

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Isothermal and non-isothermal computer simulation of a stretch blow molding process and comparison with experiments

Woo,

Choi,

Lyu

2023

Journal of Reinforced Plastics and Composites

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Environmental pollution by plastic waste has become a serious problem, and there is increasing demand to reduce the weight of PET bottles. To fabricate reduced weight PET bottles, research on the PET blow molding process is essential. In this study, experiments and computer simulations were performed on the stretch blow molding process used to fabricate carbonated soft drink PET bottles. The computer simulations were performed under the same conditions as the experiment using isothermal and non-isothermal models to analyze the blowing phenomena, thickness and temperature distributions, stretch ratio, and the stretching path of PET bottles. Experimental and simulation results were compared, confirming that the stretch blow molding simulation was useful for designing and fabricating improved PET bottles through the stretch blow molding process.

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Effect of the cooling temperature of a PET sheet on the crystallinity and mould removal time for thermoforming applications

Cited by 5 publications

References 23 publications

Energy efficiency analysis of the radiative transfer of a real medium in thermoforming

Energy efficiency analysis of the radiative transfer of a real medium in thermoforming

Using Neural Networks for Thermal Analysis of Heat Conduction

Isothermal and non-isothermal computer simulation of a stretch blow molding process and comparison with experiments

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