on 02/25/2015

Special Prize
National Kaohsiung University of Applied Sciences
The Cause of Sink Marks and the Dynamic Measurement of Thick Lens for Automotive

Thick lens molding has become a future trend for automotive lighting applications. However, undesirable product defect- sink mark is one of the biggest technological challenges in the production of thick-wall parts. It is due to the residual heat within the center of the thick lens parts after the parts are ejected from the mold cavity; thus, it gives rise to a possible re-softening of the already solidified part surface which ultimately leads to unwanted sink marks.

Moldex3D was utilized in this study to validate the residual heat phenomenon and the occurrence of sink marks. Thus, the purpose of this study is to find out the most appropriate processing parameters for a sufficient cooling to avoid sink marks which ultimately leads to better production efficiency.

By utilizing Moldex3D analysis, NKUAS was able to successfully predict and avoid potential problems that might lead to poor product quality; thus the production efficiency could be greatly enhanced.

Software used:

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