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Transient Compressible Flow in Injection Molding Runner**
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M. Amon
Veröffentlicht/Copyright:
27. Mai 2013
Abstract
The transient flow of a compressible polymer melt in an injection system consisting of a ram, a runner, and a shutoff valve is studied. Experimentally, the exit flow rate is found to have an initial value determined mainly by the precompression level and a steady state determined mainly by the ram speed. This flow rate can fall before it rises again, or it can overshoot its steady state. Such complex behavior is predicted qualitatively by a simplified mathematical model, which neglects elasticity but accounts for the finite compressibility and bulk viscosity. Four dimensionless parameters governing system dynamics are identified and their effects investigated by computation.
Published Online: 2013-05-27
Published in Print: 1989-09-01
© 1989, Carl Hanser Verlag, Munich
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Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- Prediction of Birefringence for Optical Memory Disk
- Transient Compressible Flow in Injection Molding Runner**
- Advances in Rheological Analysis of Injection Molding
- Optical and Mechanical Measurements to Characterize Injection Molded Polypropylene Plates
- Experimental Investigation of Rotational Molding and the Characterization of Rotationally Molded Polyethylene-Parts
- Blow Molding of Thermotropic Liquid Crystalline Polymers
- Position of Neutral Surface during Hollow Disk Compression Molding of Long Fibre-Reinforced Thermoplastics**
- Reactive Ion Etching of Polymer Films
- Fabrication of Microstructures of Extreme Structural Heights by Reaction Injection Molding
- Rheological Properties of Glass Fiber Filled Nylon 6 Composite System
Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- Prediction of Birefringence for Optical Memory Disk
- Transient Compressible Flow in Injection Molding Runner**
- Advances in Rheological Analysis of Injection Molding
- Optical and Mechanical Measurements to Characterize Injection Molded Polypropylene Plates
- Experimental Investigation of Rotational Molding and the Characterization of Rotationally Molded Polyethylene-Parts
- Blow Molding of Thermotropic Liquid Crystalline Polymers
- Position of Neutral Surface during Hollow Disk Compression Molding of Long Fibre-Reinforced Thermoplastics**
- Reactive Ion Etching of Polymer Films
- Fabrication of Microstructures of Extreme Structural Heights by Reaction Injection Molding
- Rheological Properties of Glass Fiber Filled Nylon 6 Composite System
