Problem & Solution

Practical answers to common plastic material challenges

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Q

PC Mold Release Agent Streaks

A

Avoid mold release agent for PC as much as possible; streaks mostly start from this; 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 i...

Molds & Tooling mold release agentstreakssurfacecontamination

Q

PC Glass Fiber Warpage

A

The root of PC glass fiber warpage is orientation, and the gate is the key; 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 future

Molds & Tooling glass fiber warpageorientationgateshrinkage

Q

PC Ejection Whitening and Cracking

A

For PC ejection whitening, check cooling and ejection; internal stress parts crack more easily; 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 ejection whiteningejector pinscoolingstress

Q

PC Mold Sticking and Scratching

A

For PC mold sticking, first reduce the holding pressure, then the draft angle and polishing; 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 stickingholding pressuredraft angleejection

Q

PC Discoloration and Yellowing

A

PC yellowing is a degradation alarm; check the melt temperature, residence and shear; 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 ...

Processing Machinery discolorationdegradationresidenceshear

Q

PC Black Specks Thermal Decomposition

A

For PC black specks, check dead corners and regrind; degradation above 320°C is the root; 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...

Molds & Tooling black speckscarbonizationdead cornersdegradation

Q

PC Flash and Overflow

A

For PC flash, first reduce the pressure, then check the clamping and parting line; 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 ...

Injection Molding flashclampingparting linepressure

Q

PC Stress Cracking by Solvents

A

For PC stress cracking, look at solvents; annealing and material selection are the two countermeasures; 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...

Processing Machinery stress crackingsolventESCannealing

Q

PC Internal Stress Cracking

A

PC internal stress is the culprit of cracking; high mold temperature, annealing and polariscope detection; 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 internal stresscrackingmold temperatureannealing

Q

PC Bubbles and Vacuum Voids

A

PC bubbles divide into gas cavities and vacuum voids, and the position distribution determines the cause; 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...

Material Drying bubblesvacuum voidsdryingshrinkage cavities

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