사출성형기용 실린더의 응력안전성에 관한 수치적 연구Numerical Study on the Stress Safety of a Cylinder for an Injection Molding Machine
- Other Titles
- Numerical Study on the Stress Safety of a Cylinder for an Injection Molding Machine
- Authors
- 김청균; 김경섭
- Issue Date
- 2011
- Publisher
- 한국생산제조학회
- Keywords
- Stress(응력); Stress safety(응력안전성); Cylinder(실린더); Injection molding machine(사출기); FEM(유한요소해석)
- Citation
- 한국생산제조학회지, v.20, no.4, pp.401 - 406
- Journal Title
- 한국생산제조학회지
- Volume
- 20
- Number
- 4
- Start Page
- 401
- End Page
- 406
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/20193
- ISSN
- 2508-5093
- Abstract
- This study presents the stress safety analysis of a cylinder, which is manufactured by a tempered ASTM D2, tempered SM45C and normalized SM45C materials, respectively. The inner diameter of three cylinder models are 85mm, 95mm,and 110mm and the total length of a cylinder is 2,365mm for a high pressure injection molding machine. The FEM computed results show that the inner diameter of 85mm with a thick thickness of 62.5mm may produce the injection pressure of 325MPa and the inner diameter of 110mm with 50mm thickness reduces up to the injection pressure of 220MPa because of a reduced thickness of a cylinder. These injection pressures are enough for a high pressure injection molding machine assembled by ASTM D2 cylinder. And also, an injection cylinder manufactured by a tempered SM45C material in which is low price may produce 225MPa injection molding pressure and this may sufficiently endure stress safety compared to that of ASTM D2 cylinder material. Thus, this study recommends that tempered SM45C cylinder is appropriated for a mild injection molding machine as an alternative cylinder material when the safety strength and low prices are considered.
But the normalized SM45C cylinder material does not meet a stress safety of yield strength in general.
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