Problem & Solution

Practical answers to common plastic material challenges

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Q

PEI Internal Stress Cracking

A

PEI internal stress management revolves around high mold temperature; the 217℃ Tg determines the process temperature level; structural rounded corners are the design bottom line.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PEI;internal stress;cracking;mold temperature;Tg;annealing

Q

PEI Excessively Fast Freezing and Insufficient Filling

A

PEI's fast freezing is a double-edged sword of the material: free of sink marks but difficult to fill; high mold temperature and fast injection are the correct countermeasures; raising melt temperature is the wrong path.; after confirming effectiveness, fix the parameters and practices into the w...

Molds & Tooling PEI;fast freezing;filling;mold temperature;runner;short shot

Q

PEI Melt Temperature Too High Degradation

A

PEI's 382℃ discoloration line is a clear supplier warning; raising mold temperature instead of melt temperature is the correct path to solve filling; temperature-sensitive materials are strictly prohibited from trading temperature for volume.

Molds & Tooling PEI;melt temperature;degradation;382℃;discoloration;silver streak

Q

PEEK Semi-Crystalline Structure Maintenance

A

PEEK performance is anchored in the semi-crystalline structure; cooling consistency is the quality bottom line; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference ...

Molds & Tooling semi-crystallinecooling consistencyprocess changeverification

Q

PEEK Compression Molding Demolding Difficulty

A

Compression molding demolding relies on the dual means of PTFE internal lubrication plus mold surface treatment; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference...

Molds & Tooling compression molding demoldingPTFE lubricationmold stickingrelease agent

Q

PEEK Compression Molding Temperature and Cooling Control

A

The success of compression molding lies in melt holding and controlled cooling; the rate must be actually measured by thermocouple; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubl...

Molds & Tooling compression molding temperaturecooling rateholdingdemolding

Q

PEEK Weld Line and Confluence Strength

A

PEEK weld lines are eliminated by design; process improvement is only a remedy; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future

Molds & Tooling weld lineconfluencemultiple gatesstrength

Q

PEEK Warpage and Uneven Crystallization

A

PEEK warpage is a crystallization stress problem; mold temperature balance comes before holding pressure adjustment; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting refer...

Molds & Tooling warpageuneven crystallizationmold temperature balanceholding pressure

Q

PEEK Tiger Stripe Pattern and Pulsating Flow

A

Tiger stripes originate from pulsating flow; raising temperature and enlarging the gate restore continuous 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 troubleshooting refere...

Molds & Tooling tiger stripepulsating flowgateplasticizing

Q

PEEK Snake Skin Pattern and Flow Marks

A

Snake skin pattern is a front instability signal; steady filling is better than lowering temperature and increasing speed; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting...

Molds & Tooling snake skin patternflow markfront instabilityfilling

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