Problem & Solution

Practical answers to common plastic material challenges

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Q

POM warpage

A

Warpage = a lesson in balancing crystallization shrinkage.

Molds & Tooling POM；warpage；crystallization；mold temperature；holding pressure

Q

POM product dimensions too small (post-shrinkage)

A

POM dimensions = only the dimensions after 24 hours count.

Molds & Tooling POM；post-shrinkage；dimension；crystallization；measurement aging

Q

POM trapped air burning

A

Burning = check both venting and temperature.

Molds & Tooling POM；trapped air；burning；venting；decomposition

Q

POM mold deposits (mold fouling)

A

POM mold fouling = a high-frequency maintenance item, and venting is the line of defense.

Molds & Tooling POM；mold fouling；deposition；venting；maintenance

Q

PMMA Overpacking Cracking

A

Overpacking stress is released by holding optimization and annealing; after confirming effectiveness, solidify 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 PMMAoverpackingcrackingholding pressure

Q

PMMA Flash

A

PMMA flash requires prevention first, as trimming damage is large; after confirming effectiveness, solidify 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 PMMAflashtrimmingchipping

Q

PMMA Demolding Whitening

A

Demolding whitening is solved by ejection equalization; after confirming effectiveness, solidify 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 PMMAdemoldingwhiteningejector pins

Q

PMMA Short Shot Troubleshooting

A

The root of PMMA short shots lies in flowability and wall thickness; structural guarantee plus mold temperature increase is more reliable than simply raising pressure; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PMMA;short shot;wall thickness;flowability;mold temperature

Q

PMMA Mold Temperature and Molecular Weight

A

Mechanical consistency relies on locking processes such as mold temperature; after confirming effectiveness, solidify 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 fu...

Molds & Tooling PMMAmold temperatureimpactconsistency

Q

PMMA Optical Part Slow Cooling

A

Slow cooling of thick optical parts is a necessary process to relieve stress; after confirming effectiveness, solidify 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 f...

Molds & Tooling PMMAoptical partsslow coolingbirefringence

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