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Reasons and countermeasures for poor Rigid plastic injection molding

Reasons and countermeasures for poor Rigid plastic injection molding

Reasons and countermeasures for poor Rigid plastic injection molding

Information
 
 
Increase
▼ Decrease
pressure speed time temperature Causes and solutions
Back pressure Injection pressure Filling pressure Screw pressure relief Injection speed Mold opening speed Screw advance time Molding cycle Melt temperature Mold temperature Nozzle temperature
Bubble/vacuum bubble           Improve exhaust, expand gate and minimum wall thickness area
Burn mark               Improve exhaust and change gate position
Discoloration             Through the barrel, clear screw, barrel, nozzle
Ejection deformation                   Check the cavity surface, improve demoulding
Abnormal screw retreat                   Check screw wear
Flash           Mold trimming, clamping force is too low
Flow marks                 Enlarge gate and improve exhaust
Thimble                 Poor mold cooling
Layer peeling             Raw material contamination, expand gate
Nozzle casting               Use chamfered nozzle
Product sticking mold       Check the cavity surface damage
Low weld line strength             Improve exhaust, gate location, clean exhaust groove
Lack of glue           Expand gate and increase injection volume
Unstable injection volume                 Check valve leakage
Shrink mark               Expand gate
Hysteresis mark             Raw materials are damp
Material handle sticky mold                 The material handle casing is damaged, increasing the bevel angle
Surface contamination             Raw materials are damp
Infusible particles                 Check the heater
Warpage           Check the position of the cooling pipe
Leukoplakia             Raw materials are damp

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