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Q

Difficult Cleaning of Carbon Deposits in PEEK Hot Runner

A

PEEK hot runner maintenance must use a dedicated high-temperature cleaning solution; tracing carbon deposit black specks should include hot runner dissection inspection; lowering temperature and draining at shutdown is a low-cost, high-return habit.

Molds & Tooling PEEK；hot runner；carbon deposit；cleaning；black speck；shutdown

Q

Difficult Demolding and Mold Sticking of PEEK

A

PEEK demolding is a friction and clamping force problem under high-temperature working conditions; investment in draft angle and polishing at the mold design stage has the highest return; over-packing is the most common inducement on the process side.

Molds & Tooling PEEK；mold sticking；demolding；ejection whitening；draft angle；clamping force

Q

Glass Fiber Friction Shear Overheating of PEEK

A

The temperature management of glass fiber reinforced PEEK must account for the shear heat contribution; the actually measured melt temperature is the only true basis; friction heating scales up in step with fiber content and screw speed.

Molds & Tooling PEEK；glass fiber；shear heat；overheating；screw speed；melt temperature

Q

Sink Marks and Shrinkage Voids of PEEK

A

For PEEK sink mark treatment, first confirm the gate freeze time and then set the holding parameters; thick-wall design is the source problem; the high material unit price makes shrinkage-void scrap costly, so mold-flow verification is worth the upfront investment.

Molds & Tooling PEEK；sink mark；shrinkage void；holding pressure；thick wall；gate freeze

Q

Filling Difficulty of PEEK Thin-Wall Parts

A

PEEK thin-wall molding is a system engineering of the three elements of material, equipment, and mold; simulation analysis and high-speed photography are key means to shorten the mold trial cycle; 0.2mm-level thin walls require a dedicated process package.

Molds & Tooling PEEK；thin wall；connector；high-speed filling；flow ratio；simulation

Q

Burn Marks and Trapped Air in PEEK

A

Locating PEEK burn marks is locating the venting design defect; high-temperature materials are more sensitive to trapped air; vent groove depth must be specially designed according to PEEK viscosity — too deep will cause flash.

Molds & Tooling PEEK；burnt；trapped air；venting；adiabatic compression；end

Q

Yellowing of PEEK Due to Excessive Melt Temperature

A

PEEK's narrow temperature window requires high precision of the temperature control system; yellowing is an early signal of degradation, and continued production will bring black specks and performance deterioration; temperature verification should use actual measurement rather than the meter dis...

Molds & Tooling PEEK；yellowing；overheating；degradation；temperature window；oxidation

Q

Ejection Deformation and Warpage of PEEK

A

PEEK ejection deformation is strongly correlated with crystallinity; raising the mold temperature is often more effective than extending cooling; the ejection system design must match the special working condition of PEEK high-temperature demolding.

Molds & Tooling PEEK；ejection deformation；warpage；crystallization；ejector pin；mold temperature

Q

Warpage Caused by Uneven Mold Temperature of PEEK

A

The core of PEEK warpage control is mold temperature uniformity; ±3℃ mold temperature control accuracy is a basic requirement for precision parts; conformal cooling channels have significant value for complex PEEK parts.

Molds & Tooling PEEK；warpage；mold temperature uniformity；crystallization difference；residual stress

Q

Poor Wear Resistance of PEEK Due to Insufficient Crystallinity

A

PEEK hidden performance defects are more dangerous than appearance defects; wear parts must use DSC crystallinity verification as the basis for shipment; actual cavity temperature measurement is more credible than the temperature controller reading.

Molds & Tooling PEEK；wear resistance；crystallinity；DSC；cold crystallization peak；mold temperature

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