Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

PC drying temperature 120℃ upper limit

A

PC drying 120℃ is the upper limit, agglomeration and discoloration are overtemperature signals；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 p...

Material Drying drying temperature120℃agglomerationdiscoloration

Q

PC moisture content 0.02% red line

A

PC moisture content 0.02% is the life-and-death line, measured release not by experience；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 problem...

Material Drying PC drying0.02%hydrolysismoisture meter

Q

PC first article verification process

A

PC first article verification must include material state indicators; four verifications plus parameter locking are the institutional guarantee to keep accidents before mass production；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recur...

Material Drying PC；first article verification；parameter locking；material changeover；batch accident

Q

PC production environment humidity

A

Environmental humidity is an invisible variable of PC drying; seasonal process compensation and sealed feeding can eliminate rainy-season quality fluctuations；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying PC；environmental humidity；rainy season；moisture absorption；sealed feeding

Q

PC screw wear monitoring

A

Equipment wear of glass fiber PC is a chronic variable; regular gap measurement and dedicated wear-resistant configuration are necessary investments for long-term stability；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PC；screw wear；glass fiber；black speck；bimetallic

Q

PC nozzle temperature management

A

PC nozzle temperature seeks balance, drooling and cold slug each take a step back；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 th...

Processing Machinery nozzle temperaturedroolingcold slugbalance

Q

PC barrel cleaning and material changeover

A

PC changeover requires thorough cleaning, dead corners of high-temperature material must be cleaned；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 simi...

Molds & Tooling barrel cleaningmaterial changeoverHDPEdead corner

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 screw rotation speed and back pressure

A

PC screw at medium-low speed and low back pressure, external heat as the main and shear as the auxiliary；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 screw rotation speedback pressureshearplasticization

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

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