injection molding fault and prevention(5)

塑料成型

1.1 Moisture streaks

Fig.1.1.1:Streaksdue to an exces-sively high mois-ture content in the

granules

Fig.1.1.2:Sectionthrough a torn streak;transmitted light,magnification 80:1

1.2 Burning streaks

Fig.1.2.1:Silverysurface streaks

Fig.1.2.2:Blackdiscolorations on

a transparent part

5

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