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History of Rotational Moulding (2 of 3 )

Edit: Smart Mold Technology Limited    Date: Jan 21, 2016



By the late 1950s, when the process was better understood, applications for other industries were developed including road cones, marine buoys, and car armrests. The Engel process was developed in Europe in the early 1960s that enabled large hollow containers to be created in low density polyethylene (LDPE) by rotating (or rocking) a mould on a chassis, houses open gas jets, through 30 degrees which coated the inside of the mould with the polymer. The cooling method was simply switching off the burners. This allowed the rocking to continue until the moulding could be extracted.



By the 1980s the rotational moulding process was streamlined by larger material suppliers around the world. And in response to increasing demand, new materials and grades became available. Storage tanks of all sizes and shapes typically dominated the industry in various compositions including polycarbonates, polyesters, polypropylene, LDPE, nylon and ABS (acrylonitrile butadiene styrene) complemented LDPE and high density polyethylene (HDPE).


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