https://www.avient.com/sites/default/files/2024-03/Nymax _ Nymax REC Processing Guide.pdf
Nozzle Drool
Nozzle temperature
too hot
• Decrease nozzle temperature
• Decrease back pressure
• Increase screw decompression
• Verify material has been dried at proper conditions
Incorrect nozzle • Use reverse taper tip
Weld Lines
Melt front
temperatures are
too low
• Increase pack and hold pressure
• Increase melt temperature
• Increase injection rate
• Increase mold temperature
Mold design
• Increase gate size
• Perform short shots to determine fill pattern
and verify proper vent location
• Add vents and/or false ejector pin
• Move gate location
Warp
Process related
• Increase cooling time
• Increase melt temperature
• Increase pack pressure
• Increase pack time
• Decrease mold temperature
Mold design • Non-uniform mold cooling
Part design • Non-uniform wall thickness
Thermolator incorrect
temperature
• Check settings
• Inspect thermocouple
Processing Guide 7
Troubleshooting Recommendations
Problem Cause Solution
Sticking in Mold
Overfilled cavity
• Decrease injection rate and pressure
• Decrease pack and hold pressure
• Adjust transfer position
• Decrease nozzle and barrel temperatures
• Decrease mold temperature
• Decrease cooling time
Mold design • Increase draft angle• Polish cores in direction of ejection
Part is too hot
• Decrease nozzle and barrel temperatures
• Decrease mold temperature
• Increase cooling time
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Copyright © 2024, Avient Corporation.
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Buyer will examine Product promptly after receipt
for damage, defects, short-weight and non-conformance.
Buyer assumes all risks and liabilities arising
out of unloading, discharge, storage, handling and use of the Product, or
arising out of compliance or non-compliance with federal, state, municipal or
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the extent, if any, attributable to Seller’s gross negligence or willful
misconduct.
https://www.avient.com/resources/safety-data-sheets?page=4447
Geon(TM) DB5072 Phos Green Non-Phthalate
PP FR 8-6 LMS-1000
https://www.avient.com/resources/safety-data-sheets?page=4331
Geon(TM) DB5215 BROWN TEX NON PHTHALATE
PP FR 8-6 LMS-1000
https://www.avient.com/resources/safety-data-sheets?page=6334
PolyOne DB4998 RED 4135 NON-PHTHALATE
PP FR 8-6 LMS-1000
https://www.avient.com/resources/safety-data-sheets?page=5655
Geon(TM) DB5436 GOLD NON-PHTHALATE
PP FR 8-6 LMS-1000
https://www.avient.com/resources/safety-data-sheets?page=4104
DNU Geon(TM) MNE30-168-1 NON PHTH
PP FR 8-6 LMS-1000
https://www.avient.com/resources/safety-data-sheets?page=4373
DB5220 BLACK UV NON-PHTHALATE
PP FR 8-6 LMS-1000
https://www.avient.com/sites/default/files/2020-10/tpe-overmold-design-guide.pdf
Mold Construction
GLS overmolding TPEs are generally non-abrasive and non-corrosive.
Mold Construction
GLS overmolding TPEs are generally non-abrasive and non-corrosive.
Problem: Non-uniform color
Possible Cause
Poor dispersion.
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