Plastic Housings: Rotational Molding vs. Injection Molding

Plastic housings enclose and protect electronics, electrical connections, and equipment. Compared to metals, plastics cost less and are lighter weight.…

Rotational Molding for Playground Equipment and Recreational Products

Playground equipment and recreational products include slides, swing sets, kayaks and canoes. Plastic is often the material of choice because…

Who Makes Plastic Fuel Tanks?

Gregstrom uses rotational molding to make plastic fuel tanks that weigh less than metal ones. Rotational molding, or rotomolding as…

Gregstrom Moves Rotomolding Business and Looks to the Future

Gregstrom Corporation, a 79-year-old plastics manufacturer, is moving its rotomolding business from Woburn, Massachusetts to Bedford, New Hampshire. Most of…

Chemical Feeder Manufacturer: Made in USA

Gregstrom Corporation is a chemical feeder manufacturer that rotomolds plastic parts, sources electrical and plumbing components, and assembles and tests…

Molded-In Threads in Rotational Molding

Molded-in threads in rotational molding provide a cost-effective way to assemble plastic products like water tanks. They eliminate the need…

Spin Welding in Rotational Molding

Spin welding is a leak-free welding technique for adding permanent fittings and ports to rotomolded tanks. First, a hole is…

Minimum Wall Separation in Rotational Molding

Learn about minimum wall separation in rotational molding, a plastics manufacturing process for strong, hollow parts.   Rotational molding can…