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Roto Moulders

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

Rotomoulding is an alternative to thermoforming, blow molding and injection molding, and although it is lower in cost, this process is not as common because of the complex and large machinery required for the fabrication process. Read More…

Roto Moulders Roto moulders are large machines that economically fabricate many different seamless, single part plastic products. They use a combination of high heat, rotation and metal moulds to create plastic constructions that may be as small as a water bottle and or the size of a large storage tank.
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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 $$$

Winfield, 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 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

Roto moulders produce many different parts and products for the food and beverage processing, medical, pharmaceutical, waste management, marine, sporting goods, recreation, toy, packaging, materials handling, automotive, plumbing and construction industries.

They are composed of a series of moulds, an oven, a cooling chamber and large mould spindles that are mounted on a rotating axis. The roto molding process begins with the fabrication of the mould, which is made either of stainless steel or aluminum.

Rotomolded 185 Gallon Containment Basin Roto Moulders - Sherman Roto Tank

Depending on the complexity, they are either welded or die cast. Aluminum moulds are thicker, since it is a softer metal. The polymer resin, in the form of fine powder, is poured into the mould. The spindles begin rotating in two directions into the oven chamber.

Under high heat, the plastic melts and evenly coats the inside walls of the mould. To cure, the moulds are then taken to a cooling chamber.

There are several different types of roto moulders, and they include rock and roll, clamshell, vertical rotational, shuttle and carousel machines. Rock and roll machines are composed of an arm that holds a large mould.

Clamshell machines are also single-arm configurations and are considered small. Vertical rotational machines are energy efficient and can fit into compact heating and cooling chambers. Shuttle machines move the moulds from different heating and cooling areas.

They can fabricate large numbers of products at once, but require a lot of operating space. Finally, carousel machines, which are the most common type, have several arms that can be in the heating or cooling chambers simultaneously. The cooling process takes about 20 minutes.

Once the plastic has cured, the newly formed product is unloaded manually, which can be difficult if the plastic has shrunk during the process. Parts that emerge from roto moulders, if they are intended to have holes or openings, must be sent for additional processing like cutting and surface finishing.

Roto Moulder Informational Video

 

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