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Practical answers to common plastic material challenges

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Q

PPS Surface Jetting Marks

A

Jetting marks are controlled by the speed curve; low-viscosity materials need more attention.; 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 ...

Molds & Tooling PPS;jetting marks;speed;gate;multi-stage injection;mold temperature

Q

PPS Mold Sticking and Difficult Demolding

A

PPS mold sticking is related to high mold temperature; demolding design must adapt to the high-temperature process.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PPS;mold sticking;demolding;mold temperature;draft;ejection

Q

PPS Burning and Trapped Gas

A

PPS high-temperature processing has higher trapped gas risk; venting design must be sufficient.; 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 simila...

Molds & Tooling PPS;burning;trapped gas;venting;speed;high temperature

Q

PPS Short Shot and Material Shortage

A

Troubleshoot PPS short shot from temperature, pressure and venting; solidification speed management of high-temperature materials is the key.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PPS;short shot;material shortage;temperature;pressure;venting

Q

PPS Warpage Deformation

A

PPS warpage relies on mold temperature uniformity and orientation management; temperature difference control of high-temperature molds is the difficulty.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PPS;warpage;mold temperature;crystallization;orientation;cooling

Q

PPS Mold Temperature Management and Crystallization

A

Mold temperature is the master switch of PPS crystallinity; high and uniform mold temperature is the premise for its performance.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PPS;mold temperature;crystallinity;warpage;dimensional stability;distribution

Q

PPS Melt Temperature Management

A

PPS high-temperature processing requires precise temperature control; taking the middle value within the 300~340°C window is a safe practice.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PPS;melt temperature;degradation;discoloration;window;calibration

Q

PPS Insufficient Drying Bubbles

A

PPS drying standards are strict; moisture management of high-temperature processing materials must not be relaxed.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying PPS;drying;bubbles;silver streaks;moisture content;hygroscopicity

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 Missing First Article Verification Causing Batch Scrap

A

PPO parameters are a starting point, not an end point; first article verification is the gate of mass production; 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...

Molds & Tooling first article verificationgrade changemass productionprocess card

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