SPE Thermoforming Quarterly®

First Quarter 2017

Heating the Sagging Sheet
by Jim Throne, Dunedin, FL

Sheet sags while being heated. Nearly all sheet is heated radiantly and nearly all of that sheet is heated from both sides. We spent inordinate hours balancing our heaters to ensure nearly the same energy input to each side of the sheet. Great technical minds propose mind-expanding mathematical treatises to describe how the sheet accepts the energy. And everybody envisions the sheet in the oven as a triad of parallel planes: top heater, sheet, bottom heater. But we all know that as the sheet heats, it begins to sag under its own weight. In short, the heated sheet is no longer planar…

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First Quarter 2017

Innovation Before Technology
By Conor Carlin, Boston, MA

The population of the 10 member states of ASEAN is approximately 670 million people which ranks higher than NAFTA and EU-28 as a trading bloc. Purchasing power, however, remains significantly lower on aggregate though growth rates are higher than most western countries. And though the term “South East Asia” was used throughout the event, several presenters drew distinctions among individual countries as the region cannot be considered monolithic. That said, there were a few ‘megatrends’ that appeared in multiple papers: demographic shifts; inter-material replacement…

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