Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

EVA '2079851475616104452 Fluidity Management

A

EVA fluidity varies with VA content; the process should be adjusted with the grade characteristics.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Injection Molding EVA; '2079851475616104452; fluidity; VA content; temperature; melt index

Q

COC '2079851475616104452 Process

A

High Tg management in COC '2079851475616104452 is the technical key; equal emphasis on temperature and fluidity; monitoring ensures quality.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Injection Molding COC; '2079851475616104452; temperature; fluidity; mold temperature; window

Q

COC Vehicle Lamp Lens Optical Defect

A

The quality yardstick of COC optical lenses is the light pattern, not the appearance; optical simulation guides gate design; surface shape accuracy is guaranteed by mold temperature uniformity.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent ...

Injection Molding COC; lens; vehicle lamp; optics; distortion; light distribution

Q

COC Pre-filled Syringe Molding Defects

A

COC pharmaceutical packaging material molding is based on the PDA process window; temperature control of deep-cavity parts is the core of dimensional accuracy; pharmaceutical packaging material inspection must give equal weight to function and appearance.; After confirming effectiveness, fix the ...

Injection Molding COC; syringe; pre-filled; wall thickness; sealing; pharmaceutical packaging material

Q

COC Optical Distortion Birefringence

A

The birefringence of COC optical parts shares the same origin as internal stress; a low-stress process is a prerequisite for optical performance; polarized light inspection should be incorporated into the standard inspection process for optical parts.

Injection Molding COC; birefringence; optics; internal stress; polarized light; annealing

Q

COC Bubbles and Vacuum Bubbles

A

COC bubbles need to be treated according to the two causes of air entrapment and vacuum; bubble inspection of transparent parts should use optical methods; low hygroscopicity does not mean they can be stored open.

Injection Molding COC; bubble; vacuum bubble; air entrapment; holding pressure; transparent

Q

COC Obvious Weld Lines

A

COC weld lines have nowhere to hide on transparent parts; the gate scheme can cure the problem more radically than process adjustment; weld line planning for optical parts should be completed at the mold design stage.; After confirming effectiveness, fix the parameters and practices into the work...

Injection Molding COC; weld line; transparent; gate; confluence; optics

Q

COC Flash

A

COC high-pressure injection process has high requirements on clamping and mold precision; flash treatment first checks hardware gap then adjusts process; transparent part flash should take mold repair as the ultimate solution.

Injection Molding COC; flash; clamping force; parting line; injection pressure; trimming

Q

COC Short Shot Insufficient Filling

A

COC short shot treatment first temperature then speed then venting; medium-high speed filling is the officially recommended process; microstructure parts need special verification of replication integrity.; after confirming effectiveness, fix the parameters and practices into the work instruction...

Injection Molding COC; short shot; filling; viscosity; injection speed; venting

Q

COC Improper Mold Temperature Setting Poor Surface

A

The core lever of COC surface quality is mold temperature; high mold temperature process close to Tg is standard for optical parts; mold temperature controller selection must cover the high-temperature section with precise control.

Injection Molding COC; mold temperature; surface; optical; Tg; flow mark

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