https://www.avient.com/sites/default/files/2024-10/Avient Announces Third Quarter 2024 Results.pdf
We are excited to share the details of our strategy at our
investor day in New York City on December 4th."
https://www.avient.com/investor-center/news/avient-announces-fourth-quarter-and-full-year-2022-results
As we begin 2023, we remain focused on executing our strategy, including integrating the APM business and being prudent and proactive in optimizing our cost structure," said
the company acquired DSM's Protective Materials business, the foundation of which is the renowned technology and globally admired brand of Dyneema®, the World's Strongest Fiber™.
https://www.avient.com/sites/default/files/2020-10/2020-gravi-tech-design-guide-.pdf
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Four Main Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Obtain Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Strategy Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Angel Hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Burns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Delamination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Dimension – Small . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Dimension – Large . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Distortion / Deformation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Flash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Jetting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Plate-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Short Shot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Sink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Splay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Surface Finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Gate Vestige . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Voids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Warpage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Weld Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
The Injection Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Non-Return Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Nozzle Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Important Advice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
The Clamping Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Mold Design Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Determining Cooling Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Cooling Line Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Design Guide 5
CHAPTER 1 | PRODUCT SUMMARY
GRAVI-TECH™ DENSITY MODIFIED FORMULATIONS
High-Performance Alternative to Lead and Other Traditional Metals
PRODUCT DESCRIPTION
Gravi-Tech™ polymer-metal composites offer
a high-performance thermoplastic-based
alternative to lead and other traditional dense
metals.
Design Guide 25
CHAPTER 6 | TROUBLESHOOTING
FOUR MAIN AREAS
Check all of these areas before changing
anything in the process . 4
Mold
• Cooling channel obstructed
• Vent plugged
• Core bent
• Damaged tooling
• Runner shutoff partially closed
• Part stuck
• Gate plugged
• Tooling shifted
Machine or Equipment
• Thermolator unplugged
• Variac unplugged
• Material bridging
• Drying turned off
Material
• Contamination
• Lot change
• Poor mixing
• Material dust
• Material not dried
Process
• Changes
- Documented
- Undocumented
OBTAIN INFORMATION
Obtain as much information as possible about
the defect
• Ask operators
- When did it start occurring
- Is it on every part
• Set-Up Tech
- Is this how the process started up
- Has this happened before
STRATEGY THEORY
Part Consistency
• Does the defect happen randomly or
every part
Machine Cycle
• Is it consistent
• Injection pressure limited
• Screw hesitation
Check Settings
• What changed
• Did a heater band turn off
• Are valves sticking
Determine at which point in the process the
defect occurs
• Injection
• Hold time
• Gate frozen
• Ejection
• Part deforming due to ejection
• Do a short shot progression
Change ONE setting at a time, and allow time
for adjustment to affect the defect
• Change speeds and pressures first
- Take immediate effect and easily reversed
• Change temperatures last
- Take time to settle in
• Extreme Measures
- Put mold into different press
26 Gravi-Tech
DEFECTS
SOURCES
Mold Machine Material Process
Damages or worn
gate/sprue
Temperature settings
overriding or changed
Sprue breaks too soon
Contamination
Lower viscosity lot
Wet material
Nozzle too hot
Cooling time too low
Not enough
decompression
RECOMMENDED ADJUSTMENTS
Reduce gate size
Increase cooling in
gate areas
Check gate for
blockages
Install a shorter nozzle or
specialty nozzle
Ensure nozzle is
temperature controlled
Dry material Add screw
decompression
Increase hold pressure
Increase hold time
Increase cooling time
Reduce nozzle tip
temperature
Angel Hair
• Commonly occurs on sprues and hot runner gates
• Long, thin strands of plastic material, which can tangle and cause components to stick together
• Can cause ejection problems
Root cause: Gate or sprue is not frozen and draws molten material with the sprue/part during mold
open phase .
https://www.avient.com/investor-center/news/polyone-announces-third-quarter-2019-results
To articulate the company's strategy and recent contributions to sustainability initiatives,
https://www.avient.com/investor-center/news/avient-announces-third-quarter-2024-results
We are excited to share the details of our strategy at our investor day in
https://www.avient.com/investor-center/news/avient-announces-first-quarter-2024-results
This will be an important component to delivering long-term sustainable growth, and I look forward to communicating our detailed strategy later this year."
https://www.avient.com/investor-center/news/avient-announces-third-quarter-2022-results
We have not wavered from our strategy of becoming a specialty formulator.
https://www.avient.com/news/polyone-announces-record-second-quarter-2015-results
We present Specialty Platform sales, gross margin, selling and administration, and operating income because management believes that this is useful information to investors by highlighting our collective progress in advancing our specialization strategy.
https://www.avient.com/sites/default/files/2021-09/avnt-q2-2021-earnings-presentation.pdf
In particular, these include statements relating to future actions; prospective changes in raw material
costs, product pricing or product demand; future performance; estimated capital expenditures; results of current and anticipated market conditions and market strategies; sales efforts; expenses; the outcome of contingencies such as
legal proceedings and environmental liabilities; and financial results.
https://www.avient.com/investor-center/news/polyone-announces-fourth-quarter-and-full-year-2016-results
We present Specialty Platform sales, gross margin, selling and administrative expense, and operating income because management believes that this is useful information to investors by highlighting our collective progress in advancing our specialization strategy.