Effect of gas pressure on the microstructure of parts foamed with the novel microcellular injection molding technology Ku‐Fizz™

With finite element analysis software Moldflow, numerical simulation and studies about FM truck roof handle were conducted on gas-assisted injection molding process. The influences of melt pre-injection shot, gas pressure, delay time and melt temperature were observed by using multi-factor orthogonal experimental method. According to the analysis of the factors' impact on evaluation index, the optimized parameter combination is obtained. Therefore the optimization design of technological parameters is done. The results show that during the gas-assisted injection molding, optimum pre-injection shot is 94%,gas pressure is 15MPa,delay time is 0.5s,melt temperature is 240 oC. This study provided a more practical approach for the gas-assisted injection molding process optimization.

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Microcellular Injection Molding

International Polymer Processing ◽

10.3139/217.1883 ◽

2005 ◽

Vol 20 (2) ◽

pp. 202-214 ◽

Cited By ~ 30

Author(s):

S. Gong ◽

M. Yuan ◽

A. Chandra ◽

H. Kharbas ◽

A. Osorio ◽

...

Keyword(s):

Injection Molding ◽

Microcellular Injection Molding

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Effect of Processing Conditions on the Shrinkage and Warpage of Glass Fiber Reinforced PP Using Microcellular Injection Molding

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.501.294 ◽

2012 ◽

Vol 501 ◽

pp. 294-299 ◽

Cited By ~ 1

Author(s):

Zhi Bian ◽

Peng Cheng Xie ◽

Yu Mei Ding ◽

Wei Min Yang

Keyword(s):

Injection Molding ◽

Glass Fiber ◽

Injection Pressure ◽

Mold Temperature ◽

Process Conditions ◽

Fiber Reinforced ◽

Injection Speed ◽

Glass Fiber Reinforced ◽

Microcellular Injection Molding ◽

Molded Parts

This study was aimed at understanding how the process conditions affected the dimensional stability of glass fiber reinforced PP by microcellular injection molding. A design of experiments (DOE) was performed and plane test specimens were produced for the shrinkage and warpage analysis. Injection molding trials were performed by systematically adjusting six process parameters (i.e., Injection speed, Injection pressure, Shot temperature, SCF level, Mold temperature, and Cooling time). By analyzing the statistically signiﬁcant main and two-factor interaction effects, the results showed that the supercritical ﬂuid (SCF) level and the injection speed affected the shrinkage and warpage of microcellular injection molded parts the most.

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Postprocessing and Property Test of Microcellular Injection Molding

Microcellular Injection Molding ◽

10.1002/9780470642818.ch10 ◽

2010 ◽

pp. 506-524

Keyword(s):

Injection Molding ◽

Microcellular Injection Molding

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Environmentally Efficient 316L Stainless Steel Feedstocks for Powder Injection Molding

Polymers ◽

10.3390/polym12061296 ◽

2020 ◽

Vol 12 (6) ◽

pp. 1296

Author(s):

Berenika Hausnerova ◽

Martin Novak

Keyword(s):

Stainless Steel ◽

Injection Molding ◽

Mass Production ◽

316L Stainless Steel ◽

Powder Injection Molding ◽

Powder Injection ◽

The Novel ◽

Efficiency Enhancement ◽

Optimum Conditions ◽

Set Up

In this study, environmentally convenient highly metal powder filled feedstocks intended for powder injection molding is presented. The composition of 60 vol % 316L stainless steel gas atomized powder feedstocks containing semicrystalline waxes: acrawax or carnauba wax and paraffin wax, combined with polyethylene glycol and modifier, was optimized to provide defect-free parts. Rheological as well as thermogravimetric analyses supported with scanning electron microscopy and metallography were employed to set up optimum conditions for molding, debinding and sintering. The performance of the novel feedstock was compared with currently available polyolefines-based materials, and results showed an efficiency enhancement due to the substantially lower (about 100 °C) mixing and molding temperatures as well as a reduction of debinding and sintering times at the simultaneous achievement of better mechanical properties in terms of elongation and tensile strength, in comparison to the mass production feedstock.

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