Journal of South China University of Technology(Natural Science Edition) ›› 2021, Vol. 49 ›› Issue (12): 23-34.doi: 10.12141/j.issn.1000-565X.200639

Special Issue: 2021年化学化工

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Simulation Study on Heat Transfer Characteristics and Cooling water Design for the Casting Film

YIN Shugui1 GUO Weike1 HUANG Dong1 ZHANG Huawei1 WU Houji1 ZHANG Chunhua2   

  1. 1.Reliability and Equipment Technology Center, Institute of Intelligent Manufacturing,Guangdong Academy of Sciences，
    Guangzhou 510650, Guangdong, China; 2.Guangdong Simcheng Plastic Machine Co. Ltd., 
    Foshan 528225, Guangdong, China
  • Received:2020-10-26 Revised:2021-05-28 Online:2021-12-25 Published:2021-12-01
  • Contact: 郭伟科(1978-)，男，工程师，主要从事机械产品可靠性研究。 E-mail:guoweike@163.com
  • About author:殷术贵(1986-)，男，工程师，主要从事流动、传热数值模拟研究。
  • Supported by:
    Supported by the Science and Technology Planning Project of Guangdong Province(2017B090901011,2017A050501045)

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Abstract: As the casting film is very thin (micron scale), if the 1∶1 geometric model is used to simulate the heat transfer of thin film, the number of grids will reach 10 billion level, and the simulation calculation will become very difficult. Therefore, this paper proposed a heat transfer simulation model of thin film thickening. In other words, the geometric model of film is enlarged, while the geometric model of roller and cooling water pipe remains unchanged, which can successfully realize the heat transfer simulation of the film cooling process. The study show that the temperature field on the surface of the film and the roller presents a spiral distribution, namely,“channel trace”, which is consistent with the thermal imaging test results. At the position with spiral guide vane, the surface temperature of the film and roller is high, the temperature of the corresponding position of the cooling water channel is low, and the film temperature fluctuates up and down in the axial direction of the film, with an amplitude of less than±1℃. The cooling process of casting film on the tape casting roller can be divided into two stages:temperature quenching stage and temperature stable stage. The cooling of the film mainly occurs in the quenching stage, and the quenching time is 0.03s, during which the film temperature can rapidly dropped to less than 40℃ from 220℃. The increase of the cooling water velocity in the spiral channel has little influence on the temperature change of the film in the circumferential direction, but has great influence on the average temperature rise slope of the film in the axial direction. The relationship between the flow velocity of cooling water in the spiral channel of tape casting roller and the slope of film axial temperature rise given at the end of this paper can provide technical reference for the design of flow rate of casting roller.

Key words: tape casting, casting film, heat transfer characteristics, casting roller, heat transfer model, numerical simulation, cooling water velocity

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