Model Laws for Gas-Assisted Injection Moulding
In this article the authors present model laws for the prediction of the gas-bubble cross-section of molded parts produced by means of gas-assisted injection molding. After a brief introduction to the basics of the similarity theory, the derivation procedure of a set of process-describing dimensionless numbers is presented. The derived model laws are checked by means of experiments with different scales of a rod-shaped rectangular molded part. The use of the model laws allows the prediction of the gas-bubble cross-section as well as GAIM-specific process parameters (e.g. gas pressure, delay time...) of new molded parts.
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