# 차량용 대형 선바이저 생산을 위한 성형해석

• Park, Jong-Nam (Department of Mechanical Engineering, Chosun College of Science & Technology) ;
• Noh, Seung-Hee (Department of Mechanical Engineering, Chosun College of Science & Technology)
• 박종남 (조선이공대학교 기계과) ;
• 노승희 (조선이공대학교 기계과)
• Accepted : 2016.11.10
• Published : 2016.11.30
• 37 20

#### Abstract

Diverse accessories are used in automobiles, such as navigation systems, front and rear cameras, spoilers, and sun visors. Sun visors block sunlight so that drivers can drive safely with a better view, and they are used in many automobile designs. However, when large plastic products are manufactured using injection molding, there are many difficulties that develop, like weld lines, short shots, flow marks, imperfections, and distortion. In this study, a CAE simulation was conducted based on previous results to predict potential problems in the injection molding of large products. The flow characteristics up to complete charge for the melting resins were captured using a computer-aided engineering simulation. The temperature departure on the front part of a flow was about $10^{\circ}C$ and very stable. The practical ejecting time of the cold runner was about 70 seconds in the simulation. Finally, the capability of a suitable injection machine was calculated and recommended by prediction of the injection pressure and the die clamping force.

#### Keywords

CAE Simulation;Clamping Force;Flow Mark;Injection Molding;Sun Visor;Weld Line

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