Problem & Solution

Practical answers to common plastic material challenges

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Q

PPO Dimensional Deviation and Shrinkage

A

PPO shrinkage is small but not immune to fluctuation; process locking plus SPC ensures dimensions; 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 simi...

Material Drying dimensional deviationshrinkagemold temperatureSPC

Q

PPO Ejector Whitening and Cracking

A

For PPO ejector whitening and cracking check cooling and ejection balance; do not forcibly eject soft parts; 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 troublesho...

Molds & Tooling ejector whiteningejector crackingejector pinscooling

Q

PPO Demolding and Mold Sticking

A

For PPO mold sticking first reduce internal stress, then check draft, polishing and cooling; 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 pr...

Molds & Tooling mold stickingdemoldinginternal stressholding pressure

Q

PPO Black Specks and Carbonization Contamination

A

For PPO black specks first check residence-discolored material, then check dead spots and regrind; 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 simi...

Processing Machinery black speckscarbonizationdead spotsregrind

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 Internal Voids

A

PPO voids are a cut-off of compensation supply, and wall thickness uniformity comes before holding pressure adjustment; 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...

Processing Machinery voidsthick wallcompensationcooling

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 Jetting Marks

A

PPO jetting is radically cured by gate wall-hitting arrangement, and fan and overlap gates are preferred; 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 troubleshooti...

Molds & Tooling jetting marksgatewall-followingfan

Q

PPO Surface Roughness and Gloss Loss

A

PPO surface replication relies on both temperatures, and hot mold is a direct means of reducing roughness; 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 troubleshoot...

Molds & Tooling surface roughnessglossmold temperaturereplication

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