Rotationally Molded Plastics banner


A reliable source for Rotationally Molded Plastic information and leading Rotationally Molded Plastic Companies & Suppliers.

The demand for shaped plastic products throughout industry, commerce and in consumer products contexts is very high. Because so many different plastic shapes are demanded from so many industries for use in so many different applications, a wide variety of plastic formation processes is necessary to accommodate them. Read More…

Rotomolding Rotomolding, also known as rotational moulding, rotomoulding, and plastic rotational molding, is a plastic formation process in which a mold is used to shape raw plastic material into a useable product.
Request for Quote

Leading Manufacturers

Orange, CA  |  877-768-6585

As a full-service rotational molding company, Roto Dynamics is your source for high quality, custom rotomolded products. Since our inception, we have continued to earn success by closely working with our customers, developing innovative and tailored solutions. We are with you every step of the way, from design and development to production and assembly. For a complete view of our capabilities and services, check out our website, or submit a request for quote to see how we can serve you!

Request A Quote

Roto Dynamics Inc. $$$

Pearland, TX  |  281-648-0909

We are a custom manufacturer of rotationally molded products. Our state of the art technology creates precise, cost effective and dependable products. Whether your order is large or small, we want to be sure you are satisfied.

Request A Quote

Sherman Roto Tank $$$

Ootsburg, WI  |  920-564-3633

In business since 1967, Dutchland is one of the top 5 manufacturers of custom rotational molded plastic products in North America. Whether it’s the size of your plastic product or the need to scale your production quickly, Dutchland gives your company the ability to Go BIG.

Request A Quote

Dutchland $$$

Rochester, IN  |  800-633-9173

RRM is a manufacturer of Rotationally Molded products, as well as a custom mold builder. Recently we have focused on advanced and innovative designs for our own proprietary products as well as for our custom products. These solutions are developed in order to add quality, value, and integrity to the products that we produce. RRM has been involved in the process of rotational molding since1988.

Request A Quote

Rochester Rotational Molding, Inc. $$$

Fountain, CO  |  719-382-9300

RMB Products offers custom plastic fabrication using thermoplastics. We perform the plastic machining as well. Some of the plastic parts we have produced include hydraulic reservoirs, pressure dispense vessels, sump tanks, process vessels and plastic tanks.

Request A Quote

RMB Products $$$
placeholder image Roto Dynamics Inc. Sherman Roto Tank Dutchland Rochester Rotational Molding, Inc. RMB Products

Rotomolding is a process used to create hollow plastic products. Plastic tanks, plastic flamingos and plastic construction cones are all on the list of potential rotationally molded plastics. Rotational molding is used to create large products in limited quantities as well as small products in abundant quantities. The process is prized for its aptitude for generating plastic formations of uniform quality and precise wall width.

Rotomolded 550 Gallon Tank Rotomolding - Sherman Roto Tank

All kinds of plastic materials can be rotationally molded: PVC, nylon, high and low density polyethylene, PET, polycarbonate and many other thermoplastic varieties can be easily and effectively formed by rotational molding. It can be used to create stock shapes for use in standardized applications, or specialized molds can be custom made to suit the needs of customers.

The rotomolding process involves heating a plastic material beyond its melting point in order to give it a shape. In this way, it is not unlike other thermoplastic forming methods like extrusion and injection molding. The difference is that in rotomolding, the mold moves and the molten plastic coats the mold as it rotates. The process begins with a collection of raw plastic material in a half mold. Once the mold is full, its other half attached and the mold is sealed.

It is then heated, causing the plastic material to exceed its melting point. Once sufficiently heated, the mold is rotated. Depending on the equipment variety, the mold can be rotated biaxially or in a single direction. Different equipment is chosen to form different kinds of shapes. Once the molten plastic has coated the entire interior surface of the mold, the mold ceases its rotation and is cooled by an external water jet cooling system or by other methods.

The cooled plastic is then ejected from the mold, keeping the mold's shape. Depending on the shape, the newly rotationally molded plastic product can be prepared for shipment to customers, or it can be sent for additional processing like cutting and surface treatment.

Rotomolding Informational Video

Plastic Molding Processes
Featured Industries