Most of the plastics products have been manufactured by injection molding. Molding trouble in injection-molded parts is caused by changing a molding product and molding process condition, etc. In this study, warpage in the injection molded part have been studied. specimens are rectangular flat shape with and without ribs. Non-crystalline resins (PC) and crystalline resins (PA66) were used for material and 30% glass fiber reinforced-resins(PC, PA66). Flat shape ribs showed higher warpage than flat shape without rib by 10 to 41%. the specimens with ribs that are located parallel to flow direction has higher warpage than the specimens with rib that are located perpendicular to flow direction by 11 to 50%. crystalline resins have higher warpage than non-crystalline resins by 22 to 78%.
목차
Abstract 1. 서론 2. 실험 및 방법 2.1 실험모델 2.2 실험 조건 및 장비 2.3. 휨의 측정 3. 결과 및 고찰 3.1 결정성 수지에 따른 휨 3.2 비결정성 수지에 따른 휨 4. 결론 참고문헌