파이프(Annular) 형상 제품의 사출성형 조건에 따른 수축 변형에 관한 연구
A study on shrinkage deformation according to injection molding conditions of pipe (annular) shaped products
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The 3 dimensional Pipe (Annular) Shaped Products was selected as a test sample, then a attribute of a molding shrinkage according to the parameters of a injection process was examined with PC, which is the typical engineering plastic. Both the inside and the outside diameter of the Pipe (Annular) sample were shrank into the inner direction of the part. And then the comparative analysis of the samples proved that a increasing thickness led a bigger shrinkage rate in the equal outside diametric samples, and a decreasing outside diameter caused a bigger shrinkage rate in the same thickness samples. The comparative study of the cushion volume of a injection machine showed that the molding shrinkage was most affected by the pressure strength among the resin temperature, the maintenance pressure strength and the maintenance pressure duration time. Each of the shrinkage rates according to the measuring direction and the gate position was different. As a result, the injection molded sample had not a typical circular shape.
Abstract
The 3 dimensional Pipe (Annular) Shaped Products was selected as a test sample, then a attribute of a molding shrinkage according to the parameters of a injection process was examined with PC, which is the typical engineering plastic. Both the inside and the outside diameter of the Pipe (Annular) sample were shrank into the inner direction of the part. And then the comparative analysis of the samples proved that a increasing thickness led a bigger shrinkage rate in the equal outside diametric samples, and a decreasing outside diameter caused a bigger shrinkage rate in the same thickness samples. The comparative study of the cushion volume of a injection machine showed that the molding shrinkage was most affected by the pressure strength among the resin temperature, the maintenance pressure strength and the maintenance pressure duration time. Each of the shrinkage rates according to the measuring direction and the gate position was different. As a result, the injection molded sample had not a typical circular shape.
참고문헌 (5)
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- 한성렬, "열가소성 엘라스토머의 기계적 물성과 수축에 관한 연구", 소성∙가공, 16(1), pp.36~41 (2007), 한국소성∙가공학회
- 문형일, "온도 및 잔류응력을 고려한 플라스틱 부품의 점탄성 해석", 소성∙가공, 17(7), pp.496~500 (2008), 한국소성∙가공학회
- 최두순, "단섬유 보강 사출성형품의 휨 감소를 위한 게이트 위치, 성형 조건 및 제품 구조 설계", 소성∙가공, 17(6), pp.443~448 (2008), 한국소성∙가공학회