Category: Uncategorized
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ARM Leak Testing Summary
On Thursday April 30, 2020 ARM held a discussion on Leak Testing, moderated by Education Committee Chairman Ron Cooke (ExxonMobil) and Sandy Scaccia (Norstar Aluminum Molds). The session was very well attended and the discussion between everyone on the call was excellent. There was so much useful information exchanged that we decided to try to…
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Ask Dr. Nick: What’s the difference between hexene and butene?
Question: I have been discussing rotomolding resin made from butene versus hexene and have received mixed feedback. Is there a real difference between the two and are there applications where one is preferred over the other? Or is it just a question of price and availability, when it comes to using prime material in natural…
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Ask Dr. Nick: XLPE v. PE heating and cooling cycles
Question: What are typical heating cooling cycles compared between XLPE and PE? Dr. Nick: Crosslinkable polyethylene (XLPE) rotomolding grades work in a different way to standard linear low density polyethylene (LLDPE) and high density polyethylene (HDPE) grades. During the cook stage of rotomolding standard PE grades, two separate things need to be achieved: Sintering – ensuring…
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“The Seven Stages of Rotomolding” Questions and Comments
As part of ARM’s on-going commitment to member service, we are ramping up our webinar program for 2020. The latest webinar was presented on March 19 by Dr Gareth McDowell of 493K. I thoroughly recommend that, if you missed the live show, you catch up with it on the ARM website. Many of you will be…
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President’s Message: ARM is adapting to unprecedented change
To give this message context, I am writing this on 03/18/20. The US has 6,519 confirmed COVID-19 cases, there have been 204,000 cases worldwide, and the DJIA is at 20,315. Schools, restaurants, bars, and other “non-essential” businesses are closed nationwide. Tom Brady just signed with the Tampa Bay Buccaneers; the world is in chaos. We…
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Ask Dr. Nick: Warpage in a polypropylene tank
Question: In a cylindrical tank made of PP powder, we have experienced a problem of warpage (internal and external waves). I wonder if you could give me your technical opinion. The inside part of the mold is welded with an additional metal stripe and in this part of the mold we are facing warpage in…
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ARM Tours Italy: Attendee Info
ARM regrets to announce that we will be postponing our tour of Italian rotomolders and our collaborative meeting with IT-RO, the Italian rotomolding organization. The meeting had been scheduled for March 29 – April 3. We are working with the venues in Italy and those we have booked for our next spring meeting to determine…
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President’s Message: ARM’s approach, offerings, and goals remain steadfast
In an attempt to understand how long New Year’s Resolutions last, a social networking firm called Strava analyzed over 30 million fitness records from its users. The results show that most New Year’s Resolutions start to derail on the second Friday in January. This year, most people’s resolutions lasted just 10 days. A…
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ARM Members Can Watch These 65 On-Demand Roto Training Webinars
Updated: As of June 2020 there are now more than 85 webinars available to members. Read the updated post. ARM webinars were viewed 3,600 webinar times in 2019. This number combines live webinar views — where members were able to partake in Q&A — and on-demand webinar views — where members were accessed our 10+ years of webinars at…
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President’s Message: The People of ARM
As my final message as the president of ARM, please forgive a different (and more personal) approach. Instead of talking about the processes and programs that make up our association. I’d like to focus on the people that populate it. It has been my complete honor to serve all of you as ARM President. You…