Problem & Solution

Practical answers to common plastic material challenges

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Q

PP Mold Deposit

A

PP mold deposit requires regular cleaning, venting is the focus; 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 similar problems in the future

Molds & Tooling mold depositprecipitationcleaningventing

Q

PP Gate Mark Whitening

A

PP gate marks rely on position plus sharp trimming; 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 similar problems in the future

Molds & Tooling gate markwhiteningtrimmingsubmarine

Q

PP Cold Slug Mark

A

For PP cold slug marks check nozzle and cold slug well; 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 similar problems in the future

Molds & Tooling cold slug marknozzlecold slug wellinjection speed

Q

PP Tiger Stripe

A

For PP tiger stripes stabilize temperature and speed; 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 similar problems in the future

Molds & Tooling tiger stripefronttemperaturespeed

Q

PP Jetting Mark

A

PP jetting marks rely on gate wall-hitting arrangement; 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 similar problems in the future

Molds & Tooling jetting markgateagainst wallinitial speed

Q

PP Dimensional Deviation

A

PP dimensions are affected by crystallization and post-crystallization, lock the process plus SPC; 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 similar p...

Molds & Tooling dimensional deviationshrinkagecrystallizationSPC

Q

PP Ejector Whitening and Cracking

A

For PP ejector whitening check cooling and ejection balance; 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 similar problems in the future

Molds & Tooling ejector whiteningejector pincoolingejection

Q

PP Mold Sticking and Scratching

A

PP mold sticking is due to shrinkage gripping, reduce holding pressure and check draft; 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 similar problems in ...

Molds & Tooling mold stickingshrinkageholding pressuredraft

Q

PP Black Speck Degradation

A

For PP black specks check dead corners and regrind, degradation over 280°C is the root; 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 similar problems in ...

Molds & Tooling black speckcarbonizationdead cornerdegradation

Q

PP Burnt Trapped Air

A

For PP burnt, first clear venting, reduce final speed and control melt temperature; 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 similar problems in the ...

Molds & Tooling burnttrapped airventingfinal speed

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