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Yaygın plastik malzeme zorluklarına pratik yanıtlar

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PP Jetting Mark

Hit the wall first then spread—jetting marks come no more.

Molds & Tooling PP;jetting mark;gate;injection speed;snake-like mark

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PP Short Shot

PP short shots are mostly a balance problem of speed and venting.

Injection Molding PP;short shot;injection speed;venting;wall thickness

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PP Part Stress Whitening

Stress whitening is a clear signal of PP 'local yielding'; the control approach is to disperse concentrated forces (starting from ejection, assembly, and structure), not to cover it up; it is a free 'stress indicator'—use it well to locate structural weak points.

Molding Process PP;stress whitening;ejector whitening;yielding;microvoid;assembly interference

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PP Tiger Stripe (Flow Mark)

Tiger stripes are flow imprints of rubber phase distribution—stable speed is the core.

Injection Molding PP;tiger stripe;flow mark;injection speed;rubber phase

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PP Weak Weld Line Strength

PP weld lines must complete entanglement before crystallization.

Molds & Tooling PP;weld line;crystallization;venting;melt temperature

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PP Flash

For flash of low-viscosity materials, pressure restraint comes first.

Injection Molding PP;flash;low viscosity;injection pressure;clamping force

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PP Dimensional Post-shrinkage Drift

PP dimensions should be managed by 'post-aging dimension'.

Molds & Tooling PP;post-shrinkage;post-crystallization;dimensional drift;annealing

16 görüntüleme

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PP Sink Mark (Shrinkage)

PP sink mark = high shrinkage meeting insufficient feeding—treat structure and holding pressure together.

Molds & Tooling PP;sink mark;shrinkage;holding pressure;rib thickness

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PP '2079851475616104452 Warpage Deformation

PP warpage takes 'uniform cooling + sufficient crystallization' as the main direction of attack.

Injection Molding PP;warpage;shrinkage rate;mold temperature;crystallization

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POM Welding Difficulty

POM's welding window is narrow—structural design must compensate; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems

Processing Machinery POMultrasonic weldingenergy directorhot plate welding

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Tüm Konular 11636 Material Drying 1439 Injection Molding 1506 Molding Process 740 Molds & Tooling 1506 Processing Machinery 2025 Extrusion & Post 2239 Blow Molding 315 Thermoforming 141 Material Analysis 1343 Production & Quality 382

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