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Effects of cooling channel layout on the cooling performance of rapid injection mold

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Abstract

Conformal cooling channels (CCCs) are a cooling passageway which follows the profile of the mold cavity or core to perform uniform cooling process effectively in the injection molding process. The production cost is closely related to productivity. To further improve productivity, the injection mold was equipped with CCCs to shorten the cooling time of the injection molded part. To investigate the relationship between the cooling channel layout and cooling efficiency of the CCCs, silicone rubber molds (SRMs) with different layouts of cooling systems were designed and constructed in this study. Simulation software was utilized to study the cooling performance. To verify the results of the simulation, SRM with different cooling systems were fabricated for low-pressure wax injection molding. It was found that the cooling time of the injection molded part is indeed affected by the total surface area of the heat exchange between the coolant and the SRM. The cooling system with four inlets and four outlets seems to be the optimum layout of the SRM in the case study in terms of the difficulty of mold making, total surface area of the heat exchange between the coolant and the SRM, and total cooling flow length of each segment. The saving in the cooling time about 2796 s and improvement of cooling efficiency about 76% can be obtained when the SRM with four inlets and four outlets was used for injection molding. The findings in this study can be used as a reference to design CCCs of injection mold built with AM technology.

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Funding

This study received financial support from the Ministry of Science and Technology of Taiwan under contract nos. MOST 109-2637-E-131-004, MOST 107-2221-E-131-018, MOST 106-2221-E-131-010, MOST 106-2221-E-131-011, and MOST 105-2221-E-131-012.

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  1. Department of Mechanical Engineering, Ming Chi University of Technology, No. 84, Gungjuan Road, New Taipei City, 243, Taiwan

    Chil-Chyuan Kuo, Zi-Fan Jiang, Ming-Xue Yang, Bing- Jun You & Wei-Cheng Zhong

  2. Research Center for Intelligent Medical Devices, Ming Chi University of Technology, No. 84, Gungjuan Road, New Taipei City, 243, Taiwan

    Chil-Chyuan Kuo

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All authors have read and agreed to the consent to the published version of the manuscript. Chil-Chyuan Kuo wrote the paper, Conceived and designed the analysis, and performed the analysis/conceptualization. Zi-Fan Jiang performed the simulation. Ming-Xue Yang, Bing-Jun You, and Wei-Cheng Zhong collected the data/contributed data or analysis tools.

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Correspondence to Chil-Chyuan Kuo.

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Kuo, CC., Jiang, ZF., Yang, MX. et al. Effects of cooling channel layout on the cooling performance of rapid injection mold. Int J Adv Manuf Technol 114, 2697–2710 (2021). https://doi.org/10.1007/s00170-021-07033-2

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