Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

PA66 post-crystallization dimensional drift

A

PA66 post-crystallization='insufficient mold temperature': raising mold temperature to lock crystallization is fundamental; manage dimensions after aging, especially guard against low-mold-temperature parts; after confirming effectiveness, fix the parameters and practices into the work instructio...

Molds & Tooling PA66; post-crystallization; mold temperature; dimension; aging

Q

PA66 glass fiber mold and screw wear

A

GF-PA66='abrasive + high temperature': hardware needs dual upgrade; wear-resistant materials and life management are the material basis for quality assurance; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.

Molds & Tooling PA66; glass fiber; wear; wear-resistant steel; screw

Q

PA66 glass fiber warpage (GF30)

A

GF-PA66 warpage='orientation problem': the gate is the breakthrough point; warpage of reinforced nylon must be treated at the fiber orientation source, hard pressing by cooling is ineffective; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent re...

Molds & Tooling PA66; glass fiber; warpage; orientation; gate

Q

PA66 sink marks

A

PA66 sink mark='feeding': holding and freeze management is the technique, structural material reduction is the root; crystalline nylon shrinks greatly and both must be emphasized; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.

Molds & Tooling PA66; sink mark; holding pressure; rib thickness

Q

PA66 air-trap burning

A

PA66 burning='venting': high-temperature nylon fears air traps more; the venting system is a life-saving design and daily cleaning must be in place; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.

Molds & Tooling PA66; air trap; burnt; venting

Q

PA66 weak weld lines

A

PA66 weld line='convergence temperature': high-melting-point nylon fronts cool fast, so convergence temperature must be given even more fully; position planning and venting are equally important; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent...

Molds & Tooling PA66; weld line; venting; melt temperature; front

Q

PA66 short shot

A

PA66 short shot='combination of temperature and speed': high-temperature high-viscosity PA66 needs both temperature and speed given in full; high-flow grades are an effective solution for thin-walled parts.

Molds & Tooling PA66; short shot; viscosity; injection speed; mold temperature

Q

PA66 flash

A

PA66 flash='low viscosity + high pressure': reducing pressure and repairing fits is the main line; nylon melt is thin and sensitive to pressure and gaps, process and mold on both fronts; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.

Molds & Tooling PA66; flash; low viscosity; clamping; parting line

Q

PA6 Product Surface Flow Marks

A

PA6 flow marks = 'front management': stabilize speed and maintain temperature; the temperature and rhythm of the front determine surface quality; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence.

Molds & Tooling PA6; flow marks; mold temperature; speed curve

Q

PA6 Product Melt Fracture Marks

A

PA6 shear marks = 'gate buffering': bring down the speed through the gate and enlarge the gate; low-viscosity material high-speed filling must guard against surface layer instability; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurr...

Molds & Tooling PA6; shear marks; melt fracture; gate

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