**7. References**


**Part 4** 

**Microcellular Injection Molding** 


**Part 4** 

**Microcellular Injection Molding** 

172 Some Critical Issues for Injection Molding

Shen, Y. K.; Liu, J. J.; Chang, C. T.; Chiu, C. Y. (2002). Comparison of the results for semisolid

Skourlis, T. P.; Mohapatra, B.; Chassapi, C. et al. (1997). Evaluation of the processing

Wenjea J. T.; Liu, D.M.; Hsu, C.K. (1999). Influence of stearic acid on suspension structure

Yang, W.; Hu, S. G.; Jin, G. (2004). Optimal allocation of process parameters of Injection

Zhang, M. M.; Lin, B. (2007). Simulation of ceramic injection molding for zirconia optical ferrule. Key Engineering Materials, Vol.336-338, pp.997-1000, ISSN: 1662-9795

*Transfer*, Vol.29, No. 1, pp.97~105, ISSN 0735-1933

International, Vol.25, No. 2, pp.191-195, ISSN 0272-8842

Zhang, M. M. (2005). Master Thesis, SME, Tianjin University, China

*Engineering Magazine*, Vol.21, No. 5, pp.37-40, ISSN 1001-4551

6679

and plastic injection molding process. *International Communications in Heat and Mass* 

parameters on the properties of advanced styrenic resins-A design of experiments approach. *Advances in Polymer Technology*, Vol.16, No. 2, pp.117-128, ISSN: 0730-

and green microstructure of injection-molded zirconia ceramics. Ceramics

Mould based on the CAE, DOE and fuzzy weight. *Mechanical & Electrical* 

**8** 

*China* 

Hu Guanghong and Wang Yue

*Shanghai Jiao Tong University, Shanghai,* 

*National Engineering Research Center of Die & Mold CAD,* 

**Microcellular Foam Injection Molding Process** 

In recent years, the polymer resin price is rising due to the petroleum shortage. How to save plastics on the premise to ensure the plastics part quality is one of the research hotspots. Microcellular foam injection molding process is developed in this background. Microcellular foam technology was invented by MIT in the early 1980's [1]. The traditional foaming processes, which produce bubbles larger than 0.25mm, are not feasible due to excessive loss of strength. Thus, the idea was born to create microcellular foam to both save plastics and

Generally, microcellular foam process takes advantage of supercritical fluid (SCF) as physical blowing agent. CO2 and N2 are usually used as agent. The microcellular foam parts have uniform cell diameters of 1 to100 microns and cell density of 109 to 1015 cells per cubic centimeters. Figure 1-1 shows the scanning electron micrographs of microcellular

Fig. 1-1. Electron micrographs of microcellular polystyrene scanning sample [2].

**1. Introduction** 

have reasonable strength.

polystyrene sample [2].
