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Q

Low Weld Line Strength of PEEK

A

PEEK weld lines cannot be completely eliminated — they can only be relocated and strengthened; high-temperature meeting is the first guarantee of interface strength; overflow wells are a worthwhile scrap cost for load-bearing parts.

Injection Molding PEEK；weld line；strength；meeting；overflow well；gate

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

Short Shot of PEEK

A

PEEK short shot treatment follows the path of temperature first, then pressure, then structure; gate size is a hard constraint for glass fiber reinforced PEEK; high-speed filling must be implemented together with good venting.

Injection Molding PEEK；short shot；short shot；viscosity；gate；filling

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

Black Specks and Carbonized Particles in PEEK

A

Tracing PEEK black specks requires combining metallographic analysis to locate the carbonization source; equipment dead spots are the root cause; the high material cost makes the cost of black-speck scrap far exceed that of ordinary plastics, so preventive purging is the most economical.

Processing Machinery PEEK；black speck；carbonization；dead spot；purging；degradation

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

Q

Brittleness Caused by Too Low Mold Temperature of PEEK

A

PEEK crystallinity is the mother of performance; products produced with mold temperature below Tg are essentially nonconforming; the DSC cold crystallization peak is direct evidence of insufficient crystallization and should serve as the standard method for dispute determination.

Molds & Tooling PEEK；brittleness；crystallinity；mold temperature；amorphous；DSC

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