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Ask Dr. Nick: What’s the Science Behind Using Zinc as a Mold Release Agent?
Question: I am looking for technical information on Zinc used as a mold release option. We use cross-linked polyethylene (PE) and understand that spray-on mold release and zinc is effective. What is the science behind how zinc helps the demolding of molding of cross-linked parts? We see coining on some colors and Zinc helps limit…
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Announcing ARM’s Health and Safety Training Certificate
We’re thrilled to announce the latest addition to the ARM Training Academy: our Health and Safety Training Certificate, now available for free to all members. This series, led by ARM Technical Director Dr. Nick Henwood, addresses essential safety topics for the rotomolding process. Like our Operator Training certificate program, this series involves videos on each…
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ARM Booklets on Amazon
Association of Rotational Molders’ publications are available on Amazon to promote awareness and knowledge of the rotational molding process — and to simplify delivery. These titles are currently available:
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What ARM did in Q1 2024
ARM provides extraordinary return on investment for our members. Here’s a summary of what we did in the first quarter: Here’s what we did in Q4.
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President’s Message: ARM’s Busy Spring
Spring is around the corner and our thoughts turn to the ARM Executive Forum, which will be here before you know it. ARM Staff, in collaboration with Katia Zoppetti, have put together a wonderful opportunity to visit some of Europe’s premier rotomolders in Northern Italy followed by the Executive Forum meeting in Bardolino. This year…
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Don’t Miss Our Tour of Italian Rotomolding Factories
Register by March 22nd to ensure the best rooms and room rates for our tour and meeting in Italy. Your registration cost includes your hotel rooms. Tour Dates (June 10 – June 12) – Open to North American members of ARM Conference Dates (June 13 & June 14) Network and learn with rotomolders and suppliers…
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Key Points on Rotation
Recent ARM calls and committee meetings have sparked discussions on rotation ratios. As a result, we’re developing multiple items to share with members on the subject. Here are some key points for now. Dr. Nick Henwood, Technical Director of the Association of Rotational Molders, is a 30-year expert in materials and process control. He operates…
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Ask Dr. Nick: Why Am I Observing Brittle Failures in LLDPE Parts?
Question: I’ve been using the Low Temperature Impact Test to evaluate our LLDPE cooked parts and consistently observing brittle failures. I suspect LLDPE might not be suitable for this test, but I lack supporting data. I’m reaching out to determine if LLDPE is the issue, prompting a material switch, or if our cooking parameters require…
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Advanced Rotomolding Training with Industry Expert Dr. Henwood
ARM Technical Director Nick Henwood will host an Advanced Rotomolding seminar at Rotoplas in Rosemont, IL on Tuesday, September 24. Registration information will be available in late May. This seminar will cover how melt index and density relate to rotomolding, alternatives to PE, how to use data sheets, thickness control, correct cure, how cooling affects…
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Bring your team to Intro to Rotomolding in 2024
Dru Laws hosts an Introduction to Rotational Molding seminar at Rotoplas in Rosemont, IL on Tuesday, September 24. Registration information will be available in late May. Over 300 people have attended the Intro seminar in the last two years. You can read their endorsements here. The seminar covers the key elements of the rotomolding process. This…