https://www.avient.com/knowledge-base/article/overmolding-part-design?rtype[]=1164
Spiral flow testing results for GLS products are presented below using injection speeds of 3 in/sec and 5 in/sec.
Special TPEs can achieve up to 40 inches at an injection speed of 5 in/sec.
Shut-Off Design
https://www.avient.com/sites/default/files/2022-06/Nymax BIO Bio-based Polyamide Solutions Processing Guide.pdf
Place cold slug wells at the base of the sprue to capture the cold material first
emerging from the nozzle.
2.
Reduce decompression
Mold design 1.
Increase cool time
Mold design 1.
https://www.avient.com/sites/default/files/2021-11/artisan-ar7300-pre-colored-formulation-processing-guide.pdf
MOLD DESIGN RECOMMENDATIONS
Gates
• Many different types of gates can be used, such as fan, tunnel, tab,
and edge gates
Cold Slug Wells
• Place these wells at the base of the sprue to capture the cold material first
emerging from the nozzle
Fibers on Surface
(Splay)
Melt temperature
too low
• Increase injection speed
Wet material
• Check moisture.
https://www.avient.com/knowledge-base/article/injection-molding-troubleshooting
Injection Molding
Increase injection rate.
Reduce injection speed.
https://www.avient.com/knowledge-base/article/injection-molding-troubleshooting?rtype[]=1164
Injection Molding
Increase injection rate.
Reduce injection speed.
https://www.avient.com/sites/default/files/2020-12/artisan-thermoplastics-nylon-processing-guide.pdf
Mold Design Recommendations
Gates
1.
Full-round runners or modified trapezoid runners are the best designs
2.
Place these wells at the base of the sprue to capture the cold material first
emerging from the nozzle
2.
https://www.avient.com/sites/default/files/2024-03/Nymax _ Nymax REC Processing Guide.pdf
Mold Design Recommendations
Gates
1.
Full-round or modified trapezoid runners are the best design and provide
the least surface to cross section ratio.
Place cold slug wells at the base of the sprue to capture the cold material
first emerging from the nozzle.
2.
https://www.avient.com/resource-center?document_type=63&document_subtype=125&industry=0&product_family=81&product_subfamily=0&product_name=0&op=FILTER RESULTS&form_build_id=form-BVD2tghPqXIOPcl0vxmei8LDvjHG38Ntio8GI-puaQg&form_id=resource_filter_form&page=0
PREPERM™ Injection Molding
Maxxam™ FR Injection Molding
Injection molding parameters, startup and shutdown, mold design and troubleshooting recommendations for LubriOne™ Internally Lubricated Formulations
https://www.avient.com/resource-center?document_type=63&document_subtype=125&industry=0&product_family=81&product_subfamily=0&product_name=0&op=FILTER+RESULTS&form_build_id=form-BVD2tghPqXIOPcl0vxmei8LDvjHG38Ntio8GI-puaQg&form_id=resource_filter_form
PREPERM™ Injection Molding
A guide to injection molding PREPERM PPE materials
Maxxam™ FR Injection Molding
https://www.avient.com/sites/default/files/2021-11/avient-design-ergonomic-design-guide.pdf
Ergonomic Grip Design Guide 17
Ergonomic Grip Design Guide 18
Avient Design began the setup for the simulation
with 3D CAD models for each of the hammer
handle designs.
Standard designs for steel and wood hammer
shafts were compared to a new polymer shaft
designed for injection molding.
Figure 27 represents a plastic
injection molding process analysis simulation that allows for design, process settings, machine and tool
recommendations.