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Q

PPS Flash and Overflow

A

Flash is the number one problem in PPS processing; its low-viscosity characteristic requires mold fit accuracy far higher than conventional engineering plastics.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PPS;flash;overflow;parting line;clamping force;accuracy

Q

PPO '2079851475616104452 Cycle Fluctuation Defects

A

PPO fears rhythm fluctuation, and residence time management follows the rhythm; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the...

Injection Molding cycle fluctuationresidence timerhythmthermal balance

Q

PPO Glass Fiber Grade Floating Fiber

A

Floating fiber of PPO high-fiber grades is suppressed by temperature and injection speed, with gates cooperating for homogenization; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a ...

Injection Molding floating fiberglass fibermelt temperatureinjection speed

Q

PPO Burning and Trapped Gas

A

PPO burning is a mismatch between fast injection and venting; venting is the premise of fast injection; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting...

Injection Molding burningtrapped gasventingfast injection

Q

PPO Sink Marks and Compensation

A

For PPO sink marks first check holding pressure ratio and time, then check gate freezing; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar probl...

Injection Molding sink markholding pressurecompensationgate freezing

Q

PPO Flash and Clamping

A

PPO's high pressure requirement tests the clamping; when flash and short shot coexist, check the equipment first; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troub...

Injection Molding flashclamping forceparting linehigh pressure

Q

PPO Injection Pressure As Low As Possible

A

PPO injection pressure as low as possible; flow problems are compensated with temperature rather than piled up with pressure; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Injection Molding injection pressureinternal stresslow pressureflow

Q

PPO Injection Speed Grading

A

PPO injection medium to fast; between fast and slow depends on flow length and venting; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar p...

Injection Molding injection speedshort shotjettinggrading

Q

PPO Injection Pressure Range

A

PPO injection pressure 100-140MPa is the baseline window; raising pressure combined with raising temperature achieves balance; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Injection Molding injection pressureshort shotflashwindow

Q

PPO Holding Pressure Ratio

A

PPO holding pressure is 40-60% of injection pressure; take the value by weighing sink marks versus stress; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Injection Molding holding pressuresink markinternal stressratio

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