Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Flash on PP '2079851475616104452 (burrs)

Injection Molding PP; flash; burr; clamping force; parting line; low viscosity

Sink marks (shrinkage) on PP injection molded products

Injection Molding PP; sink mark; shrinkage; holding pressure; rib thickness; gate freeze-off

Warpage deformation of PP injection molded products

Injection Molding PP; warpage; shrinkage rate; mold temperature; crystallization; differential shrinkage

PP Injection Part Sink Mark—Freeze-off Type

Holding after freeze-off = ineffective feeding—the gate is the key.

Injection Molding PP;sink mark;gate freeze-off;holding pressure;thick wall

PP Injection Part Metering Fluctuation

For unstable plasticization, check feeding first.

Injection Molding PP;plasticization fluctuation;bridging;pulverized material;feeding

PP Injection Part Deformation—Packaging-Induced

Packing hot parts = secondary deformation source.

Injection Molding PP;deformation;packaging;creep;stacking

PP Injection Part Gloss Deficiency

Gloss = replication + mold + grade, three elements.

Injection Molding PP;gloss;replication;polishing;mold temperature

PP Injection Multi-cavity Imbalance

For multi-cavity imbalance, first measure filling balance.

Injection Molding PP;multi-cavity;balance;runner;valve gate

PP Injection Part Weld Line Whitening

White weld line = cold front + gas and impurity enrichment.

Injection Molding PP;weld line;whitening;venting;overflow well

PP Injection Part Short Material—Poor Venting Type

Repeated fixed-point shortage = poor venting—locate with the short shot method.

Injection Molding PP;material shortage;venting;short shot method;gate

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