Optimal Heater Control in Thermoforming Preheating Using Approximate Function

Zhen Zhe Li; Gui Ying Shen; Mei Qin Li; Xiao Qian Wang; Yun De Shen

doi:10.4028/www.scientific.net/AMR.314-316.576

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 314-316Optimal Heater Control in Thermoforming Preheating...

Optimal Heater Control in Thermoforming Preheating Using Approximate Function

Abstract:

Thermoforming is one of the most versatile and economical processes available for shaping polymer products. To improve the quality of final products, the temperature difference between surface and center of sheet should be continuously minimized. But, the temperature difference between surface and center of sheet can not be freely reduced because of low thermal conductivity of sheet materials. In this paper, an analysis model was developed under the condition that the inputted heat flux was expressed by an exponential function form. In the following step, an optimal design was carried out using a 3rd order polynomial. The optimal results show that the developed method can be used to reduce the temperature difference between surface and center of sheet by adjusting the parameter of time-dependent heat flux.

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Advanced Manufacturing Technology, ADME 2011

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Periodical:

Advanced Materials Research (Volumes 314-316)

Pages:

576-580

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.314-316.576

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Online since:

August 2011

Authors:

Zhen Zhe Li, Gui Ying Shen, Mei Qin Li, Xiao Qian Wang, Yun De Shen

Keywords:

Finite Difference Method (FDM), Optimal Design, Preheating Process, Thermoforming

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