By Richard F. Grossman, Domasius Nwabunma(eds.)
This e-book provides an important elements of microcellular injection molding with functions for technology and undefined. The ebook contains: experimental rheology and pressure-volume-temperature (PVT) facts for various gasoline fabrics at genuine injection molding stipulations, new mathematical versions, micrographs of rheological and thermodynamic phenomena, and the morphologies of microcellular foam made by way of injection molding. additional, the writer proposes phases of processing for microcellular injection molding, in addition to a technique of systematic research for procedure optimization. this provides severe directions for caliber and volume analyses for processing and kit design.Content:
Chapter 1 advent (pages 1–11):
Chapter 2 fundamentals of Microcellular Injection Molding (pages 12–61):
Chapter three Morphology of Microcellular fabrics (pages 62–97):
Chapter four fabrics for Microcellular Injection Molding (pages 98–164):
Chapter five layout of Microcellular Injection Molding (pages 165–226):
Chapter 6 method for Microcellular Injection Molding (pages 227–313):
Chapter 7 gear and Machines for Microcellular Injection Molding (pages 314–398):
Chapter eight unique procedures (pages 399–457):
Chapter nine Modeling of Microcellular Injection Molding (pages 458–505):
Chapter 10 Postprocessing and estate try of Microcellular Injection Molding (pages 506–524):
Chapter eleven Markets and purposes of Microcellular Injection Molding (pages 525–551):
Chapter 12 price discounts for Microcellular Injection Molding (pages 552–577):
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Extra resources for Microcellular Injection Molding
9), and the gas absorption increases with increasing filler level. However, the dependence of gas absorption on the filler level is not linear. 3 with high pressure and low temperature for high solubility. 6 for filled and unfilled HDPE samples . As expected, the gas absorption is basically a linear function of the gas saturation pressure. It also shows the significant difference of gas absorption at the same pressure between filled and unfilled materials. It also verifies that filled material gains more gas than unfilled material does at different pressures.
On the other hand, total weight percentage of CO2 in the same plastic material will be much higher than the N2 gas dosage, which is about 3–4 times higher with the exception of PMMA. However, the experimental data in the laboratory of Trexel Inc. 2 MPa. Li et al.  at the University of Toronto reported the solubility of CO2 in PP at different temperature and pressure. They also matched the trends of the solubility of CO2 in polymer: high at high pressure and low temperature. 4  shows the CO2 gas absorption weight percentage at different saturation percentages and different melt temperatures.
However, the N2 vapor needs to be boiled off from liquid state during the real usage, and the temperature will be near room temperature prior to metering and injection into the machine since the gas temperature needs to be back to critical state as well before injecting into the barrel. In other words, the N2 blowing agent is used only in the gas state in the delivery equipment except in the storage equipment. Overall, N2 is preferred in many, if not most, technical applications because it results in a more consistent and uniform microcellular part.