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International Journal of Automotive Technology > Volume 23(6); 2022 > Article
International Journal of Automotive Technology 2022;23(6): 1739-1745.
doi: https://doi.org/10.1007/s12239-022-0151-6
DEVELOPMENT OF CRASH PAD USING OVERMOLDING TECHNOLOGY
Dong Kyou Park 1, Byung Seok Kong 2, Byung Chul Kim 3
1Department of Electromechanical Convergence Engineering, Korea University of Technology and Education
2Interior Research Lab, Hyundai Motor Company
3School of Mechanical Engineering, Korea University of Technology and Education
PDF Links Corresponding Author.  Byung Chul Kim  , Email. mir7942@koreatech.ac.kr
ABSTRACT
Herein, the hard panel-crash pad integrally overmolded with soft skin thermoplastic polyoefins (TPO) for soft feeling and cost reduction was developed. Furthermore, a cost-effective PAB door system having an in-mold tear seam was produced that avoided competitors’ patents simultaneously. The development procedure of this overmolding technology was introduced as follows. The first one is the selection of overmolding material. The second one is the design optimization. The third one is the solving of the tool challenges. The reduction in the number of process by integrally molding with soft material helped accomplish a soft feeling on the crash pad and cost reduction simultaneously. The airbag deployment as well as head impact performance and heat-aging tests were conducted and applied to five patents for optimizing the mold’s structure and injection conditions.
Key Words: Overmolding, PAB, Airbag deployment, Head impact performance, TPO
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