엔지니어링 플라스틱 材料의 再活用 混合比가 成形品 收縮에 미치는 영향
The Effect on Mixed Ratio of Recycled Engineering Plastic Resin on the Shrinkage in Molded Parts
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초록
플라스틱 재료는 재생이 가능한 열가소성 플라스틱과 재생이 거의 불가능한 열경화성 플라스틱으로 분류 할 수 있고, 본 연구에서는 재생이 가능한 열가소성 플라스틱 중 산업 및 생활 전반에 널리 사용되고 있는 PP, PA6, PC 및 PBT 재료의 재생 방안에 대한 기초 연구로서 재생 재료의 혼합비가 증가함에 따라 치수 정밀도에 미치는 영향을 고찰 하였다.
Abstract
In this study, an experimental work was performed to mold tensile specimens by using the injection molding machine. Melt temperature, mold temperature and the mixed ratio of recycled resin were selected as processing parameters for studying the effect of those conditions on the shrinkage and weight of molded parts. As a result, the shrinkage was increased with the higher mold and melt temperature and it was more sensitive to the change of mold temperature. On the other hand, the weight of molded parts was decreased with the increment of mold and melt temperature.
참고문헌 (7)
- "Crystalline and AmorphousOrientation in Injection Molded Polyethylene", pp.957~964 (1980)
- "Computer Aided Design and Fabrication ofMolds and Computer Control of Injection Molding", pp.130~136 (1983), 10
- "The Effect of FillTime on Properties", pp.488~498 (1986)
- "Prediction of Anisotropic Shrinkageof an Injection Molded Part", pp.817~821 (1994), 4
- "ShrinkageAnalysis of Injection Molded Polypropylene Parts", pp.513~517 (1994)
- "Thermolysis ofMixtures of Polyethylene and Polystyrene, Using VirginPolymers and Recycled Plastic", 5, pp.3720~3725 (1995)
- "Injection Molding Theory and Practice" (1972), pp. 270-281 New York.