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Ask Dr. Nick: How Does Wall Thickness Affect Impact Strength and MFE Results?
Question: We’re molding briefcases at 3 mm and 6 mm thickness using the same resin and oven temperature (600°F), testing impact per ARM -40 using the macro. With the same PIAT, the thicker part—tested with a 20 lb dart—has 3 to 3.5 times the MFE (Mean Failure Energy) of the thinner part, tested with a…
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ARM June Rotomolding Seminar Series – Fundamentals, Materials & Advanced Techniques
Join us at ARM HQ in Rolling Meadows, IL—just 20 minutes from O’Hare—for a series of seminars covering key aspects of rotomolding. Whether you’re new to the industry or looking to refine your process, these sessions provide practical insights from leading experts. 🥽 June 3 – Materials Deep Dive (New Seminar!) Instructor: Nick Henwood, ARM…
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Materials Deep Dive with Industry Expert Nick Henwood
ARM Technical Director Nick Henwood will host a Materials Deep Dive seminar on Tuesday, June 3, in Rolling Meadows, IL. Register here. This seminar will focus on the polymers used in rotomolding, giving attendees an in-depth understanding of the what, how, and why of material selection. Topics include polyethylene and its variants, alternative materials, polymer…
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Why You Can’t Miss the ARM 2025 Executive Forum
We’ve put together a stellar education lineup for our March 24-26 meeting in Scottsdale. Go in-depth on the details of each session and register for the event here. Below, we break down why each session is a must-attend. Defending Against Data Breach Robert Siciliano, Security Expert & Best-Selling AuthorA data breach can cost your business…
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Optimize Wall Thickness Control with ARM’s New Training Series
The Association of Rotational Molders is excited to announce the latest addition to the ARM Training Academy: Wall Thickness Variation and Control. In this series, ARM Technical Director, Dr. Henwood provides an in-depth exploration of wall thickness control, a critical aspect of the rotomolding process. There are four modules that will cover the following learning…
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What ARM did in Q4
ARM provides an extraordinary return on investment for our members. Here’s a summary of what we did in the fourth quarter of 2024. This has been a remarkable year for ARM and our members! Here’s what we did in Q3, Q2, and Q1. Not a member? Join today.
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From the ARM Archive: Causes and Cures of Problems During Rotomoulding
We’re sharing this article on the rotomolding cycle by Professor Roy Crawford, initially published in 1994. Although 30 years old, its content remains relevant to today’s manufacturing challenges. His detailed technical analysis of the rotomolding cycle, exploring how temperature variations, crystallinity, and cooling rates affect product quality, continues to serve as valuable reference material for…
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Ask Dr. Nick: Incorporating Recycle in Rotomolded Parts
Could you comment on the potential for using recycled PE in rotomolded water tanks? Dr. Nick: The incorporation of recycled PE into tank materials is a relatively new concept and is not covered by any of the normal standards (eg ASTM D1998). Some general comments on the subject are given below: Hopefully you find the…
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What ARM Did in Q3 2024
ARM provides an extraordinary return on investment for our members. Here’s a summary of what we did in the third quarter of 2024. You can also listen to a conversation about ARM’s third quarter which was generated by AI. Here’s what we did in Q2. Not a member? Join today.
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Rotoplas 2024: A Triumph of Innovation and Collaboration in Rotomolding
The rotational molding industry came together in force for Rotoplas 2024, ARM’s flagship event, showcasing the strength and vibrancy of our industry. With 80 exhibitors and just shy of 1,000 attendees from 36 countries, the conference buzzed with energy, ideas, and opportunities for growth. Alvin Spence, ARM President, Centro Inc. summed up the event’s success:…
