Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

PCABS injection pressure range

A

PC/ABS injection 80-140MPa, thin walls take the upper limit; 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

Injection Molding injection pressureshort shotthin wallinternal stress

Q

PCABS barrel residence time

A

The cycle and matching of PCABS residence time are the management core; calculation and monitoring are both important; optimization prevents degradation.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Injection Molding PCABS；residence time；cycle；injection volume；thermal degradation；matching

Q

PCABS injection speed

A

The multi-stage management of PCABS injection speed is fine control; balance ensures quality; adaptation ensures structure.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Injection Molding PCABS；injection speed；multi-stage；shear；trapped air；structure

Q

PCABS injection pressure

A

The medium-high range of PCABS injection pressure is the filling guarantee; stress and mold safety are both important; fixing ensures stability.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Injection Molding PCABS；injection pressure；80-130MPa；viscosity；complex；stress

Q

PC/ABS injection speed profile

A

Multi-stage injection is the basis of fine molding.; 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

Injection Molding PC/ABS；injection speed；profile；multi-stage；jetting；overpacking

Q

PC/ABS burnt

A

For PC/ABS burnt, first reduce speed then check venting; speed is the fastest effective adjustment.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Injection Molding PC/ABS；burnt；injection speed；venting；melt temperature；degradation

Q

PC Injection Flash

A

PC flash = 'high-pressure process meets insufficient clamping': PC is born to need high pressure, and the clamping margin must be left sufficient; first reduce holding pressure, then increase clamping, and finally repair fits, do not take high pressure as the only solution for flash.

Injection Molding PC; flash; clamping force; holding pressure; parting line

Q

PC Jetting Marks (Snake Pattern)

A

PC jetting marks 'let the melt stream stick to the wall first and then spread out': gate design coordinated with the speed curve lets the front stick to the wall as soon as it enters the cavity; jetting marks on transparent parts have nowhere to hide, and gate direction design must avoid it from ...

Injection Molding PC; jetting mark; snake pattern; gate; injection speed

Q

PC Injection Melt Temperature Actually Measured Too High

A

PC 'set temperature ≠ melt temperature': shear heat must be actually measured; PC is sensitive to overheating, the actual melt temperature must be included in monitoring, not just looking at the displayed setting; after confirming effectiveness, solidify the parameters and practices into the work...

Injection Molding PC; melt temperature; shear heat; back pressure; screw speed

Q

PC Frequent Black Specks at Injection Startup

A

PC startup black specks = 'shutdown management problem': lowering temperature and purging at shutdown is an iron rule; the number of startup scrap shots is a direct measure of whether the shutdown SOP is in place; after confirming effectiveness, solidify the parameters and practices into the work...

Injection Molding PC; startup; black speck; shutdown; carbonization

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