Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

PVDF Temperature Window Differences Among Grades

A

Temperature windows differ greatly among PVDF grades; check the official temperature table first when changing material; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling grade differencestemperature tablematerial changeprocess card

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 Product Mold Temperature Selection

A

Mold temperature affects PVDF crystallization behavior.; 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 in the future

Molds & Tooling PVDF;mold temperature;crystallization;surface;distribution;verification

Q

PVDF Product Venting Design

A

Venting design is a key point of PVDF molds.; 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 in the future

Molds & Tooling PVDF;venting;trapped gas;decomposition;cleaning;speed

Q

PVDF Product Gate Design

A

Gate design affects PVDF filling.; 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 in the future

Molds & Tooling PVDF;gate;design;shear;filling;size

Q

PVDF Product Hot Runner

A

PVDF hot runners require corrosion-resistant configuration.; 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 in the future

Molds & Tooling PVDF;hot runner;corrosion resistance;temperature control;dead spot;maintenance

Q

PVDF Product Trapped Gas Burning

A

The trapped gas position is the venting point.; 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 in the future

Molds & Tooling PVDF;trapped gas;burning;venting;end;speed

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