injection molding fault and prevention(9)

塑料成型

2. Peeling/Delamination

Fig.2.1:Peeling and delaminationcaused by strange material in thegranules

Position 1

Position 2

Fig.2.2:Partial cross section through Fig.2.1:(sample thickness 1.5 mm)

Fig.2.3:Position 1

Fig.2.4:Position 2

3. Weld line

Fig.3.1:Weld line notch; vertical illumination,

magnification 11:1

Fig.3.3:Weld line (metallic effectcoloring)

Fig.3.2:Weld line notch; transmitted light,polished,magnification 560:1

Fig.3.4:Color marking in theweld line; vertical illumination,dark field,magnification 52:1

9

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