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Q

White Stress Marks on PEEK Surface

A

PEEK stress whitening is a direct signal of local overload; check both the de'2079851475616104453 and the crystallization state; white-marked areas should be evaluated as key strength weak points.

Molds & Tooling PEEK；stress whitening；ejection whitening；crystallization；demolding；overload

Q

Much Setup Scrap for PEEK First Articles

A

PEEK setup cost must be hedged with data-based management; process cards and simulation analysis are the core tools for reducing trial and error; every kilogram of scrap is a loss of real money.

Molds & Tooling PEEK；setup；scrap；process card；simulation；cost

Q

Excessive Post-Shrinkage of PEEK Products

A

The root of PEEK post-shrinkage is still crystallinity management; completing crystallization properly during molding is the most thorough solution; high-temperature applications must undergo aging dimensional verification before finalizing the design.

Molds & Tooling PEEK；post-shrinkage；secondary crystallization；aging；dimensions；setting

Q

Thermal Expansion Out of Control of PEEK High-Temperature Molds

A

PEEK mold design must consider the thermal expansion at 200℃-level working temperatures; room-temperature fitting data cannot be directly applied; the maintenance cost of high-temperature molds should be included in the project budget.

Molds & Tooling PEEK；mold；thermal expansion；high temperature；seizure；wear

Q

Melt Fracture Surface Defect of PEEK

A

The core of PEEK melt fracture treatment is local shear rate control; multi-stage injection is the standard means to balance filling and surface quality; gate size is the key design variable.

Molds & Tooling PEEK；melt fracture；sharkskin；shear rate；multi-stage injection；gate

Q

Uneven Surface Gloss of PEEK

A

PEEK gloss is a surface mapping of mold temperature uniformity; mold temperature management for appearance parts is more stringent than for structural parts; tracing gloss differences should measure temperature first and then check polishing.

Molds & Tooling PEEK；gloss；appearance；mold temperature；polishing；venting

Q

Filling Imbalance of PEEK Multi-Cavity Molds

A

PEEK multi-cavity molds must verify balance with short shot tests; the amplification effect of high-viscosity materials on geometric deviations requires higher runner machining precision; valve gates are the high-end solution.

Molds & Tooling PEEK；multi-cavity；filling balance；runner；valve gate；short shot test

Q

Gate Stringing and Sprue Failure of PEEK

A

PEEK gate management is the ultimate test of temperature precision; hot runner tip design is more important than temperature setting; gate failures should be fully verified at the mold trial stage before mass production.

Molds & Tooling PEEK；gate；stringing；hot runner；blockage；valve pin

Q

Dimensional Accuracy Out of Tolerance of PEEK

A

PEEK dimensional accuracy is essentially a process stability problem; ±3℃ temperature control is the bottom line for precision parts; cavity pressure monitoring reflects true filling consistency better than machine parameters.

Molds & Tooling PEEK；dimensional accuracy；shrinkage；stability；cavity pressure；fluctuation

Q

Batch-to-Batch Crystallinity Fluctuation of PEEK

A

Tracing PEEK quality fluctuation should first check the actual output of the temperature control system; crystallinity sampling inspection is the quantitative handle for batch consistency; equipment performance decay needs to be hedged by preventive maintenance.

Molds & Tooling PEEK；crystallinity；batch fluctuation；mold temperature；DSC；inspection

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