Reading, PA — Remcon Plastics, Inc., today, announced the launch of its state of the art, eco-friendly, dry bulk mass flow reusable polyethylene hopper. This heavy duty unit has been designed specifically for use with fine particles and low bulk density powders. The initial offering is a two-piece design featuring a 60° cone and a 45 cubic foot capacity. Molded from FDA approved virgin polyethylene the DBH-60/45 is sanitary for food and pharmaceutical applications yet rugged enough for the most demanding industrial challenges. Design features allow the DBH-60/45 to accommodate a variety of valves and discharge configurations. Utilizing a patent pending interlock system the hopper and base can be lifted by crane as one piece or can be set up in a manner where a crane can easily lift the hopper out of the base for sanitary discharge or in areas with limited headroom.


According to Remcon President & CEO, Peter Connors, “Over the past 39 years, Remcon innovations have become the industry standards in many market segments because of the cost savings generated by durability, ease of use and sustainability. We are confident that the new DBH-60/45 will continue that trend.”

Connors noted, “The key to our long term success has been the creation of long lasting products that far outperform single/limited use flexible packaging. The long service life that each of our products provide means significantly reduced stress on your budget and our environment”

The Remcon heavy duty Dry Bulk Hopper has application for products such as dry resins, powders, or other loose granular solids. The hoppers can hold nominal weight of 5,000 pounds. This newly designed container compliments the full line of material handling products offered by Remcon, which are FDA compliant for storage, in-process handling, and shipping.

Georgeann Vaclavik, Remcon’s Director of Marketing, noted, “We will be showcasing our new heavy-duty, dry bulk material handling containers during the International Powder and Bulk Solids Conference and Exhibition in Rosemont, IL the week of August 23, 2021. The Powder Show brings together the powder and bulk solids handling and dry processing sector for one event, affording us the opportunity to showcase these heavy duty mass-flow hoppers to companies looking for innovative, environmentally friendly material handling solutions.”

What is the Rotational Molding Process?

What is rotational molding used for?

Rotational molding (commonly referred to as rotomolding) is a manufacturing process that is ideal for making hollow parts.

What is the rotational molding process?

The rotational molding process allows you to form a plastic part by coating the inside of a hollow mold with plastic material. Plastic, usually in powder form, is placed inside a metal mold and falls to the bottom forming a pool. The mold is then put in an oven and heated until the plastic melts enough to become sticky and cling to the surface.

The mold begins rotating as it enters the oven like a rotisserie except you are rotating the part on two separate axes (think of it as a merry-go-round riding on a Ferris wheel). Because of gravity the plastic wants to slide to the lowest area of the mold. Since the mold is turning the plastic keeps sliding downhill and as the powder moves over the hot mold surface another layer of particles melts in to the wall that is forming. When all of the powder has dissolved in to the walls it is time to cool the part back down and remove it from the mold.

While the mold is rotating, the plastic, driven my gravity, slides to the lowest point. The biaxial rotation (merry-go-round on a Ferris wheel) ensures that every area of the mold passes through this low point and another layer plastic adheres to the mold surface. You continue to cook the part in this manner until all of the plastic has attached to the mold.

What are the steps involved in the rotational molding process?

There are four primary steps to the rotational molding process:

  • Charging the mold with the appropriate weight of the required raw material
  • Melting the material and spreading it around the mold
  • Cooling the part so that it returns to a solid state
  • Removing the part from the mold and performing any necessary trimming operations.

What materials are used for rotational molding?

90-95% of rotationally molded parts are made from polyethylene in a full range of densities. In addition, rotomolders have had success with PVC , Polypropylene, nylon, fluorocarbons (think Teflon), PFA.

Check out this video to watch the rotational molding process in action!