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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/ABS delamination (contamination type)

A

Contamination-type delamination is prevented by material management; cleaning and classification are the institutional guarantee.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a trouble...

Extrusion & Post PC/ABS；delamination；contamination；regrind；material change；cleaning

Q

PC/ABS delamination (melt temperature too low)

A

For PC/ABS delamination, first raise the temperature to verify; if raising temperature is ineffective, then check material contamination.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post PC/ABS；delamination；melt temperature；contamination；fusion；cleaning

Q

PC/ABS improper mold temperature

A

Mold temperature 70~100℃ is the PC/ABS standard range; higher mold temperature is beneficial to both weld line and gloss.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PC/ABS；mold temperature；weld line；gloss；replication；temperature distribution

Q

PC/ABS melt temperature too high degradation

A

PC/ABS requires strict thermal management; 240~280℃ is the industry standard window, exceeding temperature means degradation.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PC/ABS；melt temperature；degradation；yellowing；window；calibration

Q

PC/ABS hydrolysis impact strength decrease

A

Hydrolysis is the most serious moisture damage of PC/ABS; the risk of half strength loss makes drying a mandatory process.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying PC/ABS；hydrolysis；impact strength；molecular chain；drying；irreversible

Q

PC/ABS insufficient drying silver streak

A

90% of PC/ABS silver streaks originate from drying; do not judge dryness by the appearance of the pellets, the moisture content must be measured before adjusting the machine.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying PC/ABS；drying；silver streak；moisture content；dew point；hydrolysis

Q

Accelerated screw wear of glass fiber reinforced PC

A

GF material 'must be equipped with a wear-resistant plasticizing system': glass fiber is an abrasive, ordinary screws cannot withstand it; hardware upgrade is more economical than repairing quality afterwards, and the plasticizing time trend is an early warning of wear.

Processing Machinery PC；glass fiber；screw wear；metering；bimetallic

Q

PC Intermittent Silver Streaks Caused by Drying Fluctuation

A

PC drying's enemy is 'secondary moisture absorption': qualified drying does not mean always qualified, dew point and sealing must be continuously monitored; intermittent silver streaks mostly require going back to check the state drift of the drying system.

Material Drying PC; drying; secondary moisture absorption; dew point; fluctuation

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

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جميع المواضيع 11636 Material Drying 1439 Injection Molding 1506 Molding Process 740 Molds & Tooling 1506 Processing Machinery 2025 Extrusion & Post 2239 Blow Molding 315 Thermoforming 141 Material Analysis 1343 Production & Quality 382