6. Main implementation parameters
The partial filling process is much more complicated than gas-assisted injection molding. The main difficulty lies with the injector: with nitrogen, the gas is injected through a cross-section of less than 0.2 mm 2 . This is made possible by the very low viscosity of the gas. With water-assisted injection, the problem is completely different and far more complicated.
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Main implementation parameters
Defects observed during installation. Solutions
Patents
While the situation is complicated with gas-assisted injection molding, it's simple with water-assisted injection molding. In fact, the Institut fûr Kunststoffverarbeitung (IKV) in Aachen, Germany, has been working on this process since 1996, and published its findings in full in the April 1999 issue of Kunststoffe. This publication prevents patent applications from being filed in Europe, enabling the process to be promoted rather...
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