Rotomolded products are seamless, uniform in wall thickness and of single construction, which eliminates costly fabrication processes and the need for replacement parts. Rotomolded products include safety cones, plastic tanks, footballs, helmets, kayaks, playground slides, pipe fittings and outdoor planters. Read More…
Roto Dynamics Inc.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 ...$$$
Sherman Roto TankPearland, TX | 281-648-0909
We are a custom manufacturer of rotationally molded products. Our state of the art technology creates precise, cost effective and dependable products. Whether your order is large or small, we want to be sure you are satisfied.$$$
Western Industries Plastic Products LLCWinfield, KS | 620-221-9464
Western Industries Plastic Products, LLC, specializes in large-part plastic blow molding. We provide expertise and services in product design, process improvement, and product assemblies. We offer our customers comprehensive services and turnkey opportunities to achieve their specific project goals. We can assist with: R&D, product design, product improvement, and secondary-fixture design. For...$$$
Fibertech PlasticsElberfeld, IN | 800-304-4600
We provide outstanding custom plastic rotational molding. Our teams offer short lead times and we will assist you from concept to production. All of our materials and designs are FDA approved and we can handle the most complex projects. We are your one stop shop for all of your rotational molding needs. Give us a call today to learn more information!$$$
CPI ProductsPort Washington, WI | 262-988-2002
CPI Products specializes in custom rotomolding and metal fabrication solutions. We offer full product assembly and offer distribution, shipping, and handling support for our customers. We are dedicated to building long-term relationships with our customers and helping them achieve their goals. We pride ourselves on our ability to work closely with our customers to develop tailored solutions that...$$$
Forte ProductsKansas City | 816-741-3000
At Forte Products, we specialize in the design, manufacturing, and distribution of high-quality rotational molding plastics products. With years of experience in the industry, we have developed a reputation for excellence, providing durable, versatile, and cost-effective solutions to our client's needs. Forte Products has the expertise and capabilities to deliver rotational molding plastics...$$$
Rotomoulding Companies List
The most common thermoplastic material used in the rotomoulding process is polyethylene, other materials include polypropylene, polyvinylidene fluoride, nylon and polyvinyl chloride. These high purity 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.
Rotomoulding 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, sporting goods, pharmaceutical, construction, toy manufacturing, food and beverage processing, chemical, plumbing, agricultural, furniture, packaging and material handling industries, among others.
The rotomoulding process begins with fabricating the mold by 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 uniform. The rotomoulding machine is composed of a series of different molds, which are mounted on rotating spindles and 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 poured and sealed in. The rotomoulding 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 are cut out if needed. The plastic is often cleaned, polished, painted or welded with small components as final post-forming fabrications.