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Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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1506 perguntas
Q
Ejector whitening of PVA injection molded products
Q
Uneven color when PVA is mixed with color masterbatch
A
Color masterbatch carrier matching and full dispersion are the key to color uniformity
Injection Molding PVA coloringcolor masterbatchcarrier compatibilitypigment dispersioncolor streaks
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Q
Oil spots on PVA injection molded products
A
Oil spots are caused by external sources of release agent and lubricant; reducing release agent and sealing mold lubrication are key
Injection Molding PVA injection oil spots mold release agent lubricant precipitation mold sealing
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Q
Low weld line strength in PVA '2079851475616104452
A
Low weld line strength is caused by insufficient molecular entanglement; high-temperature high-speed injection and overflow groove are effective countermeasures
Injection Molding PVA injection weld line insufficient entanglement injection temperature overflow groove
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Q
Insufficient flow length ratio in PVA '2079851475616104452
A
Insufficient flow length ratio is caused by PVA high viscosity; high temperature, high pressure and large gates are key
Injection Molding PVA injection flow length ratio melt viscosity injection temperature flow aid
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Q
Severe flash in PVA '2079851475616104452
A
Flash is caused by high-pressure injection and mold gap; reducing pressure and improving mold fitting are key
Injection Molding PVA injection flash clamping force parting line injection pressure
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Q
Warpage in PVA '2079851475616104452
A
Warpage is caused by shrinkage difference and orientation stress; uniform mold temperature and holding are key
Injection Molding PVA injection warpage shrinkage holding pressure annealing treatment
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Q
Premature gate freezing in PVA '2079851475616104452
A
Premature gate freezing is caused by small gate and low temperature; enlarging the gate and raising temperature are fundamental measures
Injection Molding PVA injection gate freezing holding pressure transmission gate size mold temperature
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Q
Burnt due to mold venting in PVA '2079851475616104452
A
Burning is caused by insufficient venting and high-speed injection compressing air; increasing venting and reducing speed are key
Injection Molding PVA injection mold burning vent groove injection speed air compression
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Q
Difficult demolding in PVA '2079851475616104452
A
Difficult demolding is caused by adhesion and insufficient mold design; increasing draft angle is the fundamental measure
Injection Molding PVA injection difficult demolding draft angle adhesion ejection design
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