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The injection molding process of plastics represents a manufacturing method based on the thermoplastic deformation of polymeric materials. The polymer is heated until it reaches a molten state and injected under high pressure into a closed mold, where controlled cooling and solidification occur. As a result, a part is obtained whose geometry and dimensions accurately reproduce the shape of the mold cavity. This paper aims to identify surface defects occurring in automotive components—specifically air vents and airflow direction flaps—manufactured from polymeric materials such as ABS/PC. The study also formulates recommendations for preventing the occurrence of these defects in future processes. The technological parameters analyzed include temperature, pressure, injection speed, and cooling time.

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Surface Defects Identified on Parts Obtained by the Injection Molding Process

  • 章节

  • 发表日期：

    2026年

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  • Sterpu Gabriela Lăcrămioara,
  • Munteanu Mihaela Violeta,
  • Nedelcu Anișor

摘要

The injection molding process of plastics represents a manufacturing method based on the thermoplastic deformation of polymeric materials. The polymer is heated until it reaches a molten state and injected under high pressure into a closed mold, where controlled cooling and solidification occur. As a result, a part is obtained whose geometry and dimensions accurately reproduce the shape of the mold cavity. This paper aims to identify surface defects occurring in automotive components—specifically air vents and airflow direction flaps—manufactured from polymeric materials such as ABS/PC. The study also formulates recommendations for preventing the occurrence of these defects in future processes. The technological parameters analyzed include temperature, pressure, injection speed, and cooling time.