https://www.avient.com/sites/default/files/2021-11/artisan-ar7300-pre-colored-formulation-processing-guide.pdf
BASE RESIN ABS
Drying Temperature 80–90°C
Drying Time 2–3 Hours
Barrel Temperatures °C
Rear Zone 180–210
Center Zone 190–220
Front Zone 200–230
Nozzle 210–240
Mold Temperature 50–80
Screw Speed Moderate
Back Pressure 3–10 bar
Cushion 5–15 mm
Injection Speed Low to medium
Injection Pressure Moderate to high
Holding Pressure 10–30% of injection pressure
Screw Type General purpose
Screw L/D 20:1
Screw Compression Ratio 2.0:1–2.5:1
Non-return Check Valve Free flow check ring
Nozzle Type Reverse taper
Barrel Capacity 30–80% of barrel should be used
STARTUP & SHUTDOWN RECOMMENDATIONS
Purge Compound 2–3 melt flow PP or purging compound.
Incomplete Fill
Melt and/or mold
temperature 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
• 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
Insufficient
material volume
• Increase shot size
• Increase packing pressure
Part geometry
too thick
• Reduce wall thickness
• Reduce rib thickness
Flash
Injection pressure
too high
• Decrease injection pressure
• Increase clamp pressure
• Increase transfer position
Excess
material volume
• Decrease pack pressure
• Decrease shot size
Melt and/or mold
temperature too hot
Loose clamp
• Reset mold height
• Increase clamp tonnage
Shrink
Too much shrink
• Increase cooling time
Too little shrink
• Decrease cooling time
Burning
• Reduce decompression
• 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
• Increase gate size
• Identify end of fill pattern and verify proper
vent location
• Add vents or increase vent width
• Move gate location
Warp
• Reduce injection speed
• Increase pack pressure
• Increase pack time
• 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
• Increase cooling time
• 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
• Purge barrel to eliminate material contamination
• Reduce sharp corners in material flow path
• Increase venting
Discoloration
Oversheared material
• Decrease melt temperature
• 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
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Copyright © 2021, Avient Corporation.
https://www.avient.com/products/polymer-additives/processing-enhancement-additives/cesa-plastone-processing-enhancing-additive
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Cesa™ PlastOne™ Processing Enhancing Additive
Reduced mold packing and hold times, lower injection and back pressures, and reduced scrap rates for shorter cycle times
https://www.avient.com/gray-matter
Light travels into the color and reflects back to our eye the base and color of the sample we are viewing.
This screen is printed with a based-back white through a high mesh.
The second white plate is a scaled back white plate that can either be printed directly on the first plate or after a flash.
https://www.avient.com/knowledge-base/article/injection-molding-mold-processing?rtype[]=1164
To increase shear heating, increase the screw rpm and back pressure.
Screw rpm, Back Pressure and Screw Delay Time
Normal settings for back pressure are 50 - 150 psi.
https://www.avient.com/sites/default/files/2020-12/artisan-thermoplastics-nylon-processing-guide.pdf
Processing Guidelines
Base Resin PA6
Barrel Temperatures °F °C
Rear Zone 440–470 227–243
Center Zone 450–480 232–249
Front Zone 460–490 238–254
Nozzle 470–500 243–260
Melt Temperature 470–500 243–260
Mold Temperature 120–180 49–82
Pack and Hold Pressure 50–75% of Injection Pressure
Injection Velocity 0.5 in/s–3 in/s 13 mm/s–76 mm/s
Back Pressure 50–100 psi 3.4–6.9 Bar
Screw Speed 30–70 rpm
Cushion 0.25 in 6.35 mm
Drying Parameters 2–4 Hours @ 180°F 2–4 Hours @ 82°C
Moisture % Allowable 0.08–0.18%*
Screw Type General Purpose Screw
Screw Compression Ratio 2.0:1– 2.5:1
Screw L/D 20:1
Non-return Check Valve Free Flow Check Ring
Nozzle Type Reverse Taper
Clamp Pressure 2–3 Tons/in²
Barrel Capacity 30-80% of barrel should be used
* Avient suggests measuring moisture using a Karl Fischer method or Vapor Pro® moisture analyzer that titrates only for moisture.
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
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Copyright © 2020, Avient Corporation.
https://www.avient.com/printing-performance-wear-tips
Then, dial the pressure back and print a piece of new fabric.
Keep dialing back until ink doesn’t print, then add pressure back slightly.
https://www.avient.com/sites/default/files/2020-11/2020-trilliant-hc8910-hc8920-processing-guide.pdf
Drying
Conditions English (°F) Metric (°C)
Temperature 180°F 80°C
Duration 2-4 Hours
Moisture Level
Allowable 0.05%–0.20%
Processing
Screw Speed Typical screw speeds are recommended
Back Pressure Lower back pressure is recommended
Pack Pressure 60 - 80% of max injection pressure
Hold Pressure 40 - 60% of max injection pressure
Cool Time 10 - 30 seconds (depends on part geometry and dimensional stability)
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Copyright © 2020, Avient Corporation.
https://www.avient.com/sites/default/files/2021-03/wet-grip-tpe-surfco-case-study.pdf
Furthermore, Avient’s technical team helped achieve
a surface finish that would allow for a strong bond
with an adhesive backing and recommended suitable
adhesives to achieve optimal bonding of the materials.
Beyond grip,
the non-abrasive material doesn’t peel up thanks
to a durable bond with the adhesive backing, giving
customers a reliable solution that eliminates the
problem of a slippery surface.
https://www.avient.com/knowledge-base/article/injection-molding-mold-processing
To increase shear heating, increase the screw rpm and back pressure.
Screw rpm, Back Pressure and Screw Delay Time
Normal settings for back pressure are 50 - 150 psi.
https://www.avient.com/knowledge-base/article/injection-molding-troubleshooting
Reduce rpm and back pressure.
Flow Marks
Back fills
Increase back pressure and/or screw rpm.