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Rotomoulding

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

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…

Rotomoulding Rotomoulding is a thermoplastic fabrication technique that manufactures hollow plastic products by using heat and a revolving metal mold.
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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!

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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.

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Sherman Roto Tank $$$

Ootsburg, WI  |  620-221-9464

Western Industries, Inc. specializes in plastic rotational molding production of a wide range of parts and components. This company is capable of molding very intricate parts into an array of sizes, colors and textures. They are even able to provide the product with graphics and special finishes. For all your product needs, be sure to contact us for a quote today!

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Western Industries Plastic Products LLC $$$

Elberfeld, 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!

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Fibertech Plastics $$$

Manitowoc, WI  |  920-645-0461

Trust Redline Plastics for all your plastics production needs. Rotational molding of parts up to 181 inches, vacuum/thermoforming of parts up to 120 in, and industrial cut-and-sew all under one roof! Our experienced team can handle your product development, engineering, and prototyping; provide quality on-time production of runs large or small; and value-add through assembly, packaging, and shipping.

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Redline Plastics $$$

Houston, TX  |  346-406-8158

Texas Rotomold is a superior manufacturer of rotationally molded plastics. With many years of experience, we can efficiently serve our customers at competitive prices. Our main focus has always been to provide our customers with high-quality products with the exact specifications for their needs.

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Texas Rotomold $$$

Brainerd, MN  |  218-824-2025

Revolv manufacturing specializes in the design and manufacturing of rotationally molded plastic. Since 1995, we have been producing high-quality rotationally molded plastic products. We offer our customers unrivaled customer service and high-quality products.

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Revolv Manufacturing $$$

Claremore, OK  |  346-406-8158

Need a custom rotationally molded plastic product? RotoMold USA produces items via rotational molding and performs product design, assists with mold manufacturing and mold maintenance, does quality testing and other services. We’ve done rotomolding for gas and oil, water recreation plus airline industries.

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RotoMold USA $$$
placeholder image Roto Dynamics Inc. Sherman Roto Tank Western Industries Plastic Products LLC Fibertech Plastics Redline Plastics Texas Rotomold Revolv Manufacturing RotoMold USA

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 Rotomoulding - Assmann Corporation of America

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.

Rotomoulding Informational Video

 

Rotational Molding Power Pages

Rotational Molding

Blow Molding

Rotational molding, commonly referred to as "rotomolding", is a plastic casting technique used to produce large hollow, seamless, and double-walled parts. It is a three-stage process that involves a mold on a rotating frame, a heating chamber, and a cooling chamber. Molds for the rotomolding process are specially designed....

Blow Molding

Blow Molding

Blow molding is a type of plastic forming process for creating hollow plastic products made from thermoplastic materials. The process involves heating and inflating a plastic tube known as a parison or preform. The parison is placed between two dies that contain the desired shape of the product...

Compression Molding

Compression Molding

Molding is a manufacturing process that uses a mold - the latter being a solid container used to give shape to a piece of material. It is a forming process. The form is transferred from the mold to the material by...

Plastic Molding Processes
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