Integrated Simulation of Injection Molding Process and Mechanical Behavior

2019 ◽  
pp. 113-132
Author(s):  
Weihong Zhang ◽  
Yingjie Xu
Keyword(s):  
Injection Molding ◽  
Mechanical Behavior ◽  
Injection Molding Process ◽  
Molding Process ◽  
Integrated Simulation

Integrated Simulation of Injection Molding Process and Mold Deformation Using the Uniform Mesh

2011 ◽  
Vol 189-193 ◽  
pp. 2121-2124 ◽  
Author(s):  
Ming Huang ◽  
Chun Tai Liu ◽  
Zhen Feng Zhao ◽  
Chang Yu Shen
Keyword(s):  
Injection Molding ◽  
Molding Pressure ◽  
Integrated Analysis ◽  
Injection Molding Process ◽  
Uniform Mesh ◽  
Molding Process ◽  
Data Share ◽  
Integrated Simulation ◽  
Mold Deformation ◽  
Injection Molding Simulation

For the large and complicated injection mold, the deformation of mold is one of the important factors to affect the plastic part quality and mold life. However, the accurate prediction of mold deformation is usually difficult because of the no-matching mesh between the part molding analysis and the mold structural analysis. Their analysis results can not be directly imported mutually, which leads to the loading of boundary condition having much obstacles in integrated analysis. To conquer the problem, this paper researches and develops an injection molding simulation system(Z-mold) based on Hele-shaw model, and establishes the data share interface between Z-mold and ANSYS by means of uniform mesh. Based on these studies, this paper carries out the integrated analysis of injection molding and mold. The deformation of mold under the load of the real molding pressure is successfully predicted, which is more accurate than the estimation by use of the empirical formula. This paper’s integrated study possesses great application value.

Integrative Analysis of the Injection Molding Process and Mechanical Behavior of Plastic Part

2013 ◽  
Vol 705 ◽  
pp. 181-186
Author(s):  
Qing Wen Zhang ◽  
Ying Jie Xu ◽  
Wei Hong Zhang ◽  
Jun Wang
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Injection Molding ◽  
Mechanical Behavior ◽  
Manufacturing Process ◽  
Mechanical Performance ◽  
Integrative Analysis ◽  
Injection Molding Process ◽  
Plastic Part ◽  
Molding Process

For parts made of plastics, injection molding is a common manufacturing process. Warpage and residual stress induced during the injection molding process have very important influences on the mechanical performance of injection products. In this paper, an integrative analysis of the injection molding process and mechanical performance of plastic parts is proposed. This integrative approach incorporates the effects of the manufacturing process in the mechanical simulation: (a) firstly, the finite element package MoldFlow is used to simulate the injection molding process and obtain the warpage and residual stress results. (b) Then the finite element model of plastic part including the process induced warpage and residual stress is established. Explicit dynamic finite element program LS-DYNA is used to simulate the mechanical behaviors of the molded part. Based on the integrative analysis, the influences of injection molding process parameters on mechanical behavior of a PC windshield against impact loading are studied.

Filling Behavior of Polymer Material into Sub-^|^mu;m Structure in Injection Molding Process

2013 ◽  
Vol 133 (4) ◽  
pp. 105-111
Author(s):  
Chisato Yoshimura ◽  
Hiroyuki Hosokawa ◽  
Koji Shimojima ◽  
Fumihiro Itoigawa
Keyword(s):  
Injection Molding ◽  
Polymer Material ◽  
Injection Molding Process ◽  
Molding Process

scholarly journals Study on External Gas-Assisted Mold Temperature Control with the Assistance of a Flow Focusing Device in the Injection Molding Process

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 965 ◽  
Author(s):  
Nguyen Truong Giang ◽  
Pham Son Minh ◽  
Tran Anh Son ◽  
Tran Minh The Uyen ◽  
Thanh-Hai Nguyen ◽  
...  
Keyword(s):  
Injection Molding ◽  
Temperature Control ◽  
Mold Temperature ◽  
Injection Molding Process ◽  
Melt Flow ◽  
Flow Focusing ◽  
Molding Process ◽  
Heating Efficiency ◽  
Flow Length ◽  
Insert Plate

In the injection molding field, the flow of plastic material is one of the most important issues, especially regarding the ability of melted plastic to fill the thin walls of products. To improve the melt flow length, a high mold temperature was applied with pre-heating of the cavity surface. In this paper, we present our research on the injection molding process with pre-heating by external gas-assisted mold temperature control. After this, we observed an improvement in the melt flow length into thin-walled products due to the high mold temperature during the filling step. In addition, to develop the heating efficiency, a flow focusing device (FFD) was applied and verified. The simulations and experiments were carried out within an air temperature of 400 °C and heating time of 20 s to investigate a flow focusing device to assist with external gas-assisted mold temperature control (Ex-GMTC), with the application of various FFD types for the temperature distribution of the insert plate. The heating process was applied for a simple insert model with dimensions of 50 mm × 50 mm × 2 mm, in order to verify the influence of the FFD geometry on the heating result. After that, Ex-GMTC with the assistance of FFD was carried out for a mold-reading process, and the FFD influence was estimated by the mold heating result and the improvement of the melt flow length using acrylonitrile butadiene styrene (ABS). The results show that the air sprue gap (h) significantly affects the temperature of the insert and an air sprue gap of 3 mm gives the best heating rate, with the highest temperature being 321.2 °C. Likewise, the actual results show that the height of the flow focusing device (V) also influences the temperature of the insert plate and that a 5 mm high FFD gives the best results with a maximum temperature of 332.3 °C. Moreover, the heating efficiency when using FFD is always higher than without FFD. After examining the effect of FFD, its application was considered, in order to improve the melt flow length in injection molding, which increased from 38.6 to 170 mm, while the balance of the melt filling was also clearly improved.

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