Problem & Solution

Practical answers to common plastic material challenges

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Q

PC/ABS uneven surface gloss

A

Uneven gloss points to mold temperature distribution; water channel balance is the key.; 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 later

Molds & Tooling PC/ABS；gloss；mold temperature；polishing；replication；water channel

Q

PC/ABS flash

A

Flash is distinguished into two categories of causes: clamping and wear.; 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 later

Molds & Tooling PC/ABS；flash；clamping force；parting line；wear；pressure

Q

PC/ABS short shot

A

Short shot is troubleshooted from three paths: pressure, temperature, and runner.; 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 later

Molds & Tooling PC/ABS；short shot；pressure；temperature；runner；venting

Q

PC/ABS sink mark

A

Sink marks follow the shrinkage compensation mechanism; structural design is fundamental.; 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 ...

Molds & Tooling PC/ABS；sink mark；holding pressure；wall thickness；gate；coring out

Q

PC/ABS bubble

A

Bubbles are identified in four categories: moisture, trapped air, vacuum bubble, and degradation.; 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...

Material Drying PC/ABS；bubble；drying；venting；shrinkage compensation；degradation

Q

PC/ABS weld line

A

Weld line management relies on temperature and gate; high mold temperature is particularly effective for PC/ABS weld lines.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PC/ABS；weld line；temperature；gate；confluence；venting

Q

PC/ABS silver streak (air entrapment type)

A

Air-type silver streaks have a scattered form; back pressure and nozzle seal are the troubleshooting points.; 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 fo...

Processing Machinery PC/ABS；silver streak；air；back pressure；nozzle；suck-back

Q

PC/ABS silver streak (degradation type)

A

Degradation-type silver streaks are shiny and drying is ineffective; temperature reduction verification is the identification method.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a tro...

Material Drying PC/ABS；silver streak；degradation；temperature；shear；identification

Q

PC/ABS shrinkage rate management

A

Low and predictable shrinkage rate is the precision advantage of PC/ABS; only a stable process can deliver it.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PC/ABS；shrinkage rate；dimension；precision；compensation；SPC

Q

PC/ABS warpage

A

PC/ABS warpage relies on mold temperature and cooling management; uniform cooling is the core.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PC/ABS；warpage；cooling；mold temperature；shrinkage；gate

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