Plastic Rotational Molding

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

While the most common thermoplastic material used for plastic rotational molding is polyethylene, other materials include polypropylene, polyvinylidene fluoride, nylon and polyvinyl chloride. Read More…

Plastic Rotational Molding Plastic rotational molding is a thermoplastic fabrication technique that manufactures hollow products by using heat and a revolving metal mold. Rotomolded products are seamless, uniform in wall thickness and of single construction, which eliminates costly fabrication processes and the need for replacement parts.

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. $$$

Richmond, BC  |  604-271-1324

Molded plastic tanks are one of the items that Century Plastics Ltd. manufactures. We offer water tanks, bins, and totes for storage and merchandising. Our vertical poly tanks range from 5 gallons - 2400 gallons and are used for battery boxes, recycling bins, potable water tanks and more.

Request A Quote

Century Plastics Ltd. $$$

Elberfeld, IN  |  888-930-3455

We provide outstanding custom plastic rotational molding. Our teams offer short lead times and we will assist you from concept to production. All of our materials and designs are FDA approved and we can handle the most complex projects. We are your one stop shop for all of your rotational molding needs. Give us a call today to learn more information!

Request A Quote

Fibertech, 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. We also manufacture a standard line of chemical storage and process tanks. All of our products go through rigorous testing. The safety of those working with or near our tanks and the environment is a top priority for us.

Request A Quote

Sherman Roto Tank $$$

Decorah, IA  |  563-382-9636

IRP’s rotational molding is the cost-effective, long-life solution to other forms of molding. When considering any custom molding project for your business, accept no substitutes. We’ve become known for our wide range of products, best-in-class service and a strong commitment to customer satisfaction. Call Iowa Rotocast Plastics today and find out how they can increase your sales tomorrow.

Request A Quote

Iowa Rotocast Plastics, Inc. $$$
placeholder image Roto Dynamics Inc. Century Plastics Ltd. Fibertech, Inc. Sherman Roto Tank Iowa Rotocast Plastics, Inc.

These plastics are exposed to high heat and therefore must exhibit good thermal stability. To enhance properties like flame retardancy, water and chemical resistance as well as the ability to withstand extreme temperatures, many resin powders contain additives, which can also alter the color, texture, finish and appearance of the cured plastic's surface.

Plastic rotational molding is an alternative to blow molding, injection molding and thermoforming, but is not as common because of the large, expensive machinery that is used to form the products. Still, this molding process is used within the sporting goods, waste water management, marine, pharmaceutical, construction, toy manufacturing, food and beverage processing, chemical, plumbing, agricultural, furniture, packaging and material handling industries, among others.

Rotomolded products include safety cones, plastic tanks, footballs, helmets, kayaks, playground slides, pipe fittings and outdoor planters.

The plastic rotational molding process starts with mold fabrication via welding, for simpler designs, or die casting, for more complex constructions. The molds are made of stainless steel, aluminum or a combination of both, when wall thickness is not intended to be uniform.

The plastic rotational molding machine is composed of a series of different molds, which are mounted on rotating spindles, which revolve on one or two axes. The polymer resin powder, which must be very fine in order to coat all areas of the mold, is then poured. The plastic rotational molding machines are then transported to an oven chamber while they continuously revolve.

Once under high heat, the powder melts and evenly covers the mold walls. Next, it travels to a cooling chamber, which uses a combination of cold water and air to cure the plastic. This takes about 20 minutes. Once the plastic has fully dried, the molds are manually unloaded, which can be difficult if the plastic shrinks.

Right out of the mold, rotomoulded products are hollow parts without any openings or holes; they must be cut out if needed. The plastic is often cleaned, polished, painted or welded with small components as final post-forming fabrications.

Plastic Rotational Molding Informational Video