https://www.avient.com/sites/default/files/2020-12/artisan-thermoplastics-nylon-processing-guide.pdf
Place vents at each 90° intersection and vent to atmosphere
8.
Cut vent depths to 0.0007″–0.0015″
Draft Angle Maintain a minimum draft angle of 1° per side
4 Artisan Pre-Colored Thermoplastics
Incomplete Fill
Melt and/or mold
too cold
• Increase nozzle and barrel temperatures
• Check thermocouples and heater bands
Shot size
• Increase shot size
• Adjust transfer position to 98% full
• Increase cushion
Mold design
• Enlarge or widen vents and increase number of vents
• Check that vents are unplugged
• Check that gates are unplugged
• Enlarge gates and/or runners
• Perform short shots to determine fill pattern
and verify proper vent location
• Increase wall thickness to move gas trap to
parting line
Brittleness
Degraded/overheated
material
• Decrease melt temperature
• Decrease back pressure
• Use smaller barrel
Gate location
and/or size
• Relocate gate to non-stress area
• Increase gate size to allow higher flow rate
and lower molded-in stress
Wet material
• Check moisture.
Sink Marks
Melt too hot • Decrease nozzle and barrel temperatures
Insufficient
material volume
• Increase shot size
• Increase packing pressure
Part geometry
too thick
• Reduce wall thickness
• Reduce rib thickness
Processing Guide 5
Flash
Injection pressure
too high
• Decrease injection pressure
• Increase clamp pressure
• Increase transfer position
Excess
material volume
• Adjust transfer position
• Decrease pack pressure
• Decrease shot size
Melt or mold
too hot
• Decrease nozzle and barrel temperatures
• Decrease mold temperature
Loose clamp • Reset mold height
• Increase clamp tonnage
Shrink
Too much shrink • Increase cooling time
Too little shrink • Decrease cooling time
Burning
• Reduce decompression
Mold design • Clean, widen and increase number of vents
• Increase gate size to reduce shear
Wet material • Verify material is dried at proper condition
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
Mold design
• Increase gate size
• Identify end of fill pattern and verify proper
vent location
• Add vents or increase vent width
• Move gate location
6 Artisan Pre-Colored Thermoplastics
Warp
• Increase melt temp
• Reduce injection speed
• Increase pack pressure
• Increase pack time
• Decrease mold temperature
• Increase cool time
Mold design • Non-uniform mold cooling
Part design • Non-uniform wall thickness
Thermolator incorrect
temperature
• Check settings
• Inspect thermocouple
Sticking in Mold
Overfilled cavity
• Decrease injection rate and pressure
• Decrease hold pressure
• Decrease cooling time
Part too hot
• Decrease barrel temperature
• Decrease mold temperature
• Increase cooling time
Mold design • Increase draft angle
• Polish cores in direction of ejection
Black Specks
Contamination • Purge machine
Degradation
• Reduce melt temperature
• Reduce screw speed
• Reduce back pressure
Machine related • Check for wear on screw, barrel or check ring
Delamination
• Increase melt temperature
• Decrease injection speed
• Purge barrel to eliminate material contamination
Mold design • Reduce sharp corners in material flow path
• Increase venting
Processing Guide 7
Discoloration
Oversheared
material
• Decrease melt temperature
• Decrease injection speed
• Reduce residence time
Mold design • Increase gate sizing
Dry material • Check moisture of material to ensure it is within the
recommended moisture percentage for molding
1.844.4AVIENT
www.avient.com
Copyright © 2020, Avient Corporation.
https://www.avient.com/investor-center/news/avient-announces-record-second-quarter-2021-results-increases-full-year-guidance
8:00 a.m.
Effective Tax Rate(1)
Effective Tax Rate(1)
https://www.avient.com/investor-center/news/avient-announces-record-third-quarter-2021-results
8:00 a.m.
Effective Tax Rate(1)
Effective Tax Rate(1)
https://www.avient.com/products/polymer-additives/processing-enhancement-additives/cesa-ctr-additives
Reduce cycle times, reduce scrap rates and improve part aesthetics with Cesa™ PlastOne™
https://www.avient.com/products/polymer-additives/processing-enhancement-additives/colormatrix-eze-slip-agent-pet
This slip agent advances mold release resulting in reduced thread pulls and less blow line jams, enabling faster cycle times, improved production rates, and reduced waste.
https://www.avient.com/products/polymer-additives/uv-and-light-blocking-additives/colormatrix-ultimate-uv390r-light-barrier-rpet
This ensures that packaging with higher usage rates of rPET can maintain adequate UV barrier functionality and improved rPET processability.
https://www.avient.com/knowledge-base/case-study/automaker-finds-savings-appeal-new-colorant-plus-additive
Improved quality and reduced waste: It eliminated uneven quality and high scrap rates that were inherent to working with fabric-covered parts.
https://www.avient.com/knowledge-base/case-study/i-ilsan-saves-time-money-self-lubricating-polymer
The company, which does its own injection molding, found that the polyamide and LubriOne™ combination generated a 50% reduction in scrap rates.
https://www.avient.com/knowledge-base/article/emerging-trends-and-top-10-production-challenges-blow-molded-bottles
For packaging tier suppliers and converters, extrusion blow molding is a popular process due to low tool and die cost, fast production rates and ability to mold complex parts.
https://www.avient.com/news/new-geon-plenstar-series-telecommunication-cables-launched-iwcs
Addressable applications for the Plenstar series are Cat 3 to Cat 6 multi-conductor cables with a 75°C UL temperature rating, passing UL 444.