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…
Leading Manufacturers
Roto Dynamics Inc.
Orange, CA | 877-768-6585As 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!
Topp Industries, Inc.
Rochester, IN | 800-354-4534Topp Industries is a world-leader in rotationally molded plastics including plastic storage tanks and double-wall tanks. We offer a number of rotomolded poly basins and containers, as well as offering state-of-the-art custom rotomolding services.
Fibertech, Inc.
Elberfeld, IN | 888-930-3455We 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.
Sherman Roto Tank
Pearland, TX | 281-648-0909We 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.
Trilogy Plastics, Inc.
Alliance, OH | 330-821-4700For over 50 years, Trilogy Plastics has specialized in rotationally molded plastics and other forms of rotational molding. Let our experienced staff of rotomolders create a plastic part solution for you. We are committed to finding innovative solutions to your rotational molding needs.
Rotomolding - Sherman Roto TankRotomolding 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.
Rotomolding - Sherman Roto TankAll 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.