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7. Defects observed during installation. Solutions
As we have seen, the water-assisted injection molding process has both advantages and disadvantages, which can have dramatic consequences for the part and consequently also for the processor. Indeed, committing to produce a part using this process and then having to offer the customer an alternative solution because technical problems have not been solved can be commercially penalizing. Here we find the same phenomena as in gas-assisted injection molding. As the same causes have the same effects, we recommend the same remedies in most cases.
The following is a non-exhaustive list of faults that can be observed when using this process, along with a suggested solution or remedy.
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Material front perforation
Material front perforation is caused by insufficient material injection. To remedy this,...
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Defects observed during installation. Solutions
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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...
Bibliography
Manufacturers. Manufacturers
(non-exhaustive list)
Mixed power injection
PME fluidtec
TiK
Pressure control blowers
...
Organization
Institut für Kunstsoffverarbeitung (IKV)
Center de mise en forme des matériaux (Cemef), École des mines de Paris
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