Problem & Solution

Practical answers to common plastic material challenges

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Q

TPU Burrs and Flash

A

TPU burr troubleshooting proceeds from easy to difficult; five routes progress stepwise: raw material, pressure, clamping, mold, equipment; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding TPU; burr; flash; clamping force; mold wear

Q

TPU Crack Stress

A

For TPU cracking, check stress concentration and demolding; 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 TPUcrackstressgate

Q

TPU Silver Streak Moisture Dominant

A

When TPU shows silver streaks, suspect drying first; the three checks of dew point, moisture content and reabsorption are the fixed opening moves; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying TPU; silver streak; moisture; dew point; drying

Q

TPU Bubble Cause Distinction

A

TPU bubbles are identified by the three routes before treatment; 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

Material Drying TPUbubblethree routesidentification

Q

TPU Injection Speed Control

A

TPU speed strategy is stability-first; the balance between shear degradation and flow marks relies on medium-low speed plus temperature compensation; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding TPU; injection speed; medium-low speed; shear; flow mark

Q

TPU Injection Pressure Grading

A

TPU pressure setting should be tailored to each part; high pressure buys filling, but also brings flash and stress risks; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding TPU; injection pressure; grading; thin wall; flash

Q

TPU Shrinkage Rate 0.4-1.4%

A

TPU's low shrinkage is a dimensional advantage; but the wide 0.4-1.4% range requires precise margin according to grade; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling TPU; shrinkage rate; 0.4-1.4%; hardness; wall thickness

Q

TPU Film Yellowing

A

Outdoor transparent film must be aliphatic; 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

Processing Machinery TPUfilmyellowingaliphatic

Q

TPU Automotive Interior

A

Automotive parts are selected according to odor standards; 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

Processing Machinery TPUinteriorodorlow odor

Q

TPU Color Masterbatch Selection

A

TPU color masterbatch must be dedicated and temperature-resistant; 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

Processing Machinery TPUcolor masterbatchdiscolorationtemperature resistance

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