Problem & Solution

Practical answers to common plastic material challenges

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Q

PC Flow Marks

A

For PC flow marks, raise the temperature and stabilize the speed; high viscosity is the internal 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 troubleshooting...

Injection Molding flow marksmold temperatureinjection speedviscosity

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 multi-stage injection application

A

PC multi-stage injection controls shear, slow entry, stable middle, slow finish；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 multi-stage injectionjettingshearburnt

Q

PC holding pressure and sink mark stress

A

PC holding pressure 40-60%, balancing sink marks and stress at both ends；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

Injection Molding holding pressuresink markinternal stressratio

Q

PC injection pressure 100-150

A

PC injection 100-150MPa, high viscosity requires high pressure but prevent overpressure；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding injection pressureshort shotinternal stressthin wall

Q

PC melt fracture phenomenon

A

Melt fracture is a typical shear defect of PC high-elasticity melt; raising temperature, reducing speed, and enlarging the gate are tried in order of cost；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PC；melt fracture；sharkskin；gate shear；surface roughness

Q

PC shear rate sensitivity

A

PC fears high shear, both rotation speed and injection speed must be controlled；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 shear ratedegradationscrew rotation speedyellowing

Q

PC injection pressure 100-150MPa

A

PC's high viscosity determines high pressure demand; pressure just sufficient is enough, excessive pressure brings stress and flash, requiring fine grading according to structure；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PC；injection pressure；100-150MPa；holding pressure；multi-stage injection

Q

PCL plastic surgery filling material

A

The durability of PCL plastic surgery filling is commercial value; regulation and formulation are technology; tracking ensures safety and effectiveness.；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PCL；plastic surgery；filling；degradation；volume；durability

Q

PCL insert molding

A

Interfacial management of PCL insert molding is the key; both preheating and design are emphasized; testing ensures reliability.；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PCL；insert；interface；thermal expansion；preheating；testing

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