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일반적인 플라스틱 재료 문제에 대한 실질적인 답변

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Q

PVDF Extrusion Cable Temperature Profile Setting

A

Cable extrusion uses an ascending temperature profile; raising the die to 260℃ for gloss must be premised on short residence; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post extrusion temperaturecableascending profilescorch

Q

PVDF Die Buildup and Drool

A

Die buildup is treated with special aids plus die temperature control; die cleaning only treats the symptoms; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; Include this case in the defect archive as a reference for troubleshootin...

Extrusion & Post die buildupdroolextrusion aidprecipitation

Q

PVDF Extrusion Melt Fracture Sharkskin

A

Sharkskin is eradicated with special PPA aids; speed reduction is only a stopgap measure; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; Include this case in the defect archive as a reference for troubleshooting similar problems i...

Extrusion & Post melt fracturesharkskinprocessing aidspeed increase

Q

PVDF Weld Line Weak Strength

A

PVDF weld lines rely on temperature to promote fusion plus structural avoidance; pressure-bearing parts must be checked at weld positions; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post weld linemulti-gatepressure resistanceconfluence

Q

PVDF High Shrinkage Causes Sink Marks and Shrinkage Voids

A

2-3% high shrinkage is PVDF's nature; strengthened holding pressure plus structural material reduction is a two-pronged treatment; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling shrinkagesink marksshrinkage voidsholding pressure

Q

PVDF Mold Temperature Affects Crystallinity and Performance

A

Mold temperature is the switch for PVDF crystallinity; for performance parts, taking the upper limit of 80-95℃ is safer; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling mold temperaturecrystallinitysemi-crystallineperformance

Q

PVDF Corrosion of Barrel and Screw and Material Selection

A

HF corrosion is a chronic killer; PVDF production lines must be equipped with corrosion-resistant barrels and prohibit copper parts; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling barrel corrosionbimetallicHastelloycopper parts prohibited

Q

PVDF Yellowing and Thermal Degradation Discoloration

A

The essence of yellowing is de-HF generating conjugated double bonds; lowering temperature, shortening time, and adding HF scavengers are applied together; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling yellowingde-HFconjugated double bondsirradiation

Q

PVDF Excessive Processing Temperature Decomposition Releasing HF

A

280℃ is the red line for PVDF processing; overtemperature releases HF that injures people and corrodes machines, and actual melt temperature measurement is a must; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery thermal decompositionhydrogen fluoridetemperature upper limitsafety

Q

PVDF Bubbles Caused by Confusion of Drying Parameters

A

Drying parameters are based on the resin supplier, with 0.05% moisture content as the acceptance line; do not rely on online hearsay experience; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying drying parametersbubblesmoisture contentdata sheet

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카테고리

전체 주제 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