Problem & Solution

Practical answers to common plastic material challenges

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Q

PBT product flash

A

Distinguish clamping and wear for flash; progressive flash indicates mold repair.; 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 similar problems in ...

Molds & Tooling PBT; flash; clamping force; parting line; wear; mold repair

Q

PBT product flow marks

A

Flow marks are improved by temperature and speed.; 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 similar problems in the future

Molds & Tooling PBT; flow mark; front; temperature; speed; gate

Q

PBT large shrinkage and dimensional deviation

A

PBT shrinkage management relies on measured data and process stability; dimensional judgment of crystalline materials must allow sufficient aging time.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PBT; shrinkage; dimension; mold temperature; holding pressure; aging

Q

PBT notch-sensitive brittle cracking

A

Notch sensitivity is an inherent weakness determined by PBT's molecular structure; modification and structural design are the two major solution paths, and toughened grades should take priority over process adjustment.; after confirming effectiveness, solidify the parameters and practices into th...

Molds & Tooling PBT; notch sensitivity; brittle cracking; toughening; blending modification; molecular structure

Q

PARA Warpage Simulation Application

A

PARA warpage simulation must recognize model limitations; actual calibration improves accuracy; test verification is the final criterion.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PARA; warpage; simulation; fiber orientation; calibration; verification

Q

PARA Demolding Sticking

A

PARA sticking treatment covers the three elements of holding, draft angle and temperature; excessive holding is a common inducement; systematic design prevents recurrence.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PARA; mold sticking; holding; draft angle; mold temperature; demolding

Q

PARA Abnormal Shrinkage

A

The temperature dependence of PARA shrinkage must be understood; low shrinkage does not equal high quality; the design basis must be accurate.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PARA; shrinkage; mold temperature; crystallinity; design; verification

Q

PARA Creep Tendency

A

PARA creep management starts with mold temperature crystallization; design stress limits must be observed; long-term data supports application.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PARA; creep; mold temperature; crystallinity; load; deformation

Q

PARA Post-Crystallization Risk

A

PARA post-crystallization is a hidden risk of low-temperature molds; DSC is the confirmation means; prevention is better than after-the-fact treatment.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PARA; post-crystallization; DSC; dimension; mold temperature; verification

Q

PARA Mold Temperature Actual Measurement

A

Actual measurement verification of PARA mold temperature is the crystallization guarantee; displayed values are not trustworthy; multi-point measurement covers uniformity.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PARA; mold temperature; actual measurement; 120°C; probe; uniformity

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