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Problem & Solution

Practical answers to common plastic material challenges

1506 questions
Q
EVOH injection multi-cavity filling imbalance
A
Multi-cavity filling imbalance is caused by runner design; balanced runners and mold flow analysis are key
Injection Molding EVOH injection multi-cavity balance runner design gate size mold flow analysis
Q
EVOH injection molded product ejector whitening
Q
EVOH injection product has oil spots
A
Oil spots are caused by external sources of release agent and lubricant; reducing release agent and sealing mold lubrication are key
Injection Molding EVOH injection oil spots release agent lubricant precipitation mold sealing
Q
EVOH and color masterbatch mixing with uneven color
A
Color masterbatch carrier matching and sufficient dispersion are the key to color uniformity
Injection Molding EVOH coloring color masterbatch carrier compatibility pigment dispersion color streaks
Q
EVOH injection weld line strength is low
Q
EVOH injection flow length ratio is insufficient
A
Insufficient flow length ratio is caused by EVOH's high viscosity; high temperature, high pressure, and large gates are key
Injection Molding EVOH injection flow length ratio melt viscosity injection temperature flow aid
Q
EVOH injection flash is severe
A
Flash is caused by high-pressure injection and mold gap; reducing pressure and improving mold fit are key
Injection Molding EVOH injection flash clamping force parting line injection pressure
Q
EVOH injection warpage deformation
A
Warpage is caused by shrinkage differences and orientation stress; uniform mold temperature and holding pressure are key
Injection Molding EVOH injection warpage shrinkage rate holding pressure annealing treatment
Q
EVOH injection gate freezes too early
A
Premature gate freezing is caused by small gate and low temperature; enlarging the gate and increasing temperature are fundamental measures
Injection Molding EVOH injection gate freezing holding pressure transmission gate size mold temperature
Q
EVOH injection mold venting burnt
A
Burning is caused by insufficient venting and high-speed injection compressing air; increasing venting and reducing speed are key
Injection Molding EVOH injection mold burning vent groove injection speed air compression
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