Title: Water-assisted injection molding (WAIM): model and validation of water penetration behavior
Authors: Sannen, Sofie
De Munck, Maarten
Van Puyvelde, Peter
De Keyzer, Jozefien
Issue Date: 2013
Conference: SPE EUROTEC edition:1 location:Lyon date:4-5 July 2013
Abstract: Water-assisted injection molding enables the production of high quality hollow or partially hollow products, with a low process cost as well as a high design and manufacture flexibility. However, principle mechanism behind the building of the residual wall thickness are until now not (fully) understood. Present literature is hence not able to clearly indicate and consequently to explain the influence of a varying process/material parameter on the thickness of the residual wall. In this study, the building of the residual wall thickness during the water-assisted injection molding process was described with the aid of a physical model. The influence of polymer viscosity was thereafter predicted with the aid of the model and linked to the experimental obtained residual wall thickness and in-mold pressure measurements, in order to validate the proposed model. The comparison of the predictions and experiments revealed that the model is able to predict and consequently to explain the influence of a varying parameter on the formation of the residual wall thickness. Moreover, the accompanied insights into the principle mechanism behind the process lead to a more fundamental understanding of the water/polymer behavior during water injection.
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Soft Matter, Rheology and Technology Section
Production Engineering, Machine Design and Automation (PMA) Section
Sustainable Chemical Process Technology TC, Technology Campus Diepenbeek
Sustainable Chemical Process Technology TC
Technologiecluster Werktuigkundige Industriƫle Ingenieurstechnieken
Mechanical Engineering Technology TC, Technology Campus Diepenbeek

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