The conventional finite element method was employed to study the relationship between melt filling and air accumulation in micro-cavities. The variational equation for melt flow with slip boundary condition and air resistance was generalized based on Galerkin principle. To investigate the effect of air accumulation, the governing equation for air flow inside runner was established by dimensionless method. An iterative approach was proposed to solve the coupled melt flow problem and air flow problem. Numerical results show that air accumulation can affect the melt filling in micro-cavity, and closely depends on injection speed. Adjusting branch runner distribution can improve the flow balance, which was convinced by a real micro-part manufacturing.
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February 2011
Research Papers
Study on Air Accumulation and Influence on Flow Balance in Micro-Injection Molding
Shufeng Gan,
Shufeng Gan
APPT NERC,
Zhengzhou University
, Zhengzhou 450002, China
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Shubing Ye,
Shubing Ye
Shenzhen Zhaowei Machinery & Electronics Co., Ltd.
, Shenzhen 518103, China
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Qian Li,
Qian Li
APPT NERC,
Zhengzhou University
, Zhengzhou 450002, China
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Changyu Shen
Changyu Shen
APPT NERC,
Zhengzhou University
, Zhengzhou 450002, China
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Wei Cao
Shufeng Gan
APPT NERC,
Zhengzhou University
, Zhengzhou 450002, China
Shubing Ye
Shenzhen Zhaowei Machinery & Electronics Co., Ltd.
, Shenzhen 518103, China
Qian Li
APPT NERC,
Zhengzhou University
, Zhengzhou 450002, China
Changyu Shen
APPT NERC,
Zhengzhou University
, Zhengzhou 450002, ChinaJ. Manuf. Sci. Eng. Feb 2011, 133(1): 011004 (6 pages)
Published Online: January 24, 2011
Article history
Received:
May 11, 2010
Revised:
December 10, 2010
Online:
January 24, 2011
Published:
January 24, 2011
Citation
Cao, W., Gan, S., Ye, S., Li, Q., and Shen, C. (January 24, 2011). "Study on Air Accumulation and Influence on Flow Balance in Micro-Injection Molding." ASME. J. Manuf. Sci. Eng. February 2011; 133(1): 011004. https://doi.org/10.1115/1.4003337
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