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Effect of foaming processes on the reduction of warpage in glass fiber reinforced plastic composites

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Abstract

In the injection molding process, dimensional stability of the product is an important factor. Because reinforced plastic composites show shrinkage and warpage that are different from non-reinforced plastics, it is necessary to compensate for these differences. In this study, two foaming methods, microcellular foaming injection molding and chemical foaming injection molding, were applied to achieve dimensional stability in the molding process of glass fiber reinforced plastic (GFRP) composites. Both microcellular foaming and chemical foaming showed a warpage reduction effect. Therefore, if a selective foaming process is applied to achieve weight reduction and necessary material properties, microcellular foaming and chemical foaming can be used to achieve dimensional stability in reinforced plastic composite materials.

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Acknowledgments

This research was supported by the Basic Science Research Program via the National Research Foundation of Korea (NRF), which is funded by the Ministry of Education (No. NRF-2018R1D1A1B07049405).

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Authors and Affiliations

  1. School of Mechanical Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul, Korea

    Soo-hyun Cho, Hyun Keun Kim, Joo Seong Sohn, Youngjae Ryu & Sung Woon Cha

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  1. Soo-hyun Cho
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  2. Hyun Keun Kim
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  3. Joo Seong Sohn
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  4. Youngjae Ryu
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  5. Sung Woon Cha
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Corresponding author

Correspondence to Sung Woon Cha.

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Recommended by Associate Editor Zhuhua Tan

Sung Woon Cha is a Professor of Mechanical Engineering at Yonsei University, Seoul, Korea. He received his Ph.D. in Mechanical Engineering from the Massachusetts Institute of Technology, USA, in 1994.

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Cho, Sh., Kim, H.K., Sohn, J.S. et al. Effect of foaming processes on the reduction of warpage in glass fiber reinforced plastic composites. J Mech Sci Technol 33, 4227–4232 (2019). https://doi.org/10.1007/s12206-019-0735-x

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  • DOI: https://doi.org/10.1007/s12206-019-0735-x

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