Polyamide for coolant pipes GIT / WIT - Defects and how to avoid them

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Shrink holes Chambers
Fehler Lunker Fehler Kammerbildung
Cause: Shrinkage between the two outer frozen layers

Corrective: High water volume output, high holding pressure, slowly crystallizing material
 Cause: Water divides the melt because of too high injection pressure
Corrective: Decrease of injection pressure, increase of pressure holding period
Bubbles Foaming
Fehler Bläschen Fehler Schaumbildung
Cause: Water mixes with the melt and vaporizes afterwards

Corrective: Increase of pressure holding period
 Cause: gas mixes up with melt

Corrective: Increase of pressure holding period