Rotomoulding Manufacturers and Companies

IQS Directory implements a thorough list of rotomoulding companies and suppliers. Utilize our listing to examine and sort top rotomoulding companies with previews of ads and detailed descriptions of each product. Any rotomoulding company can design, engineer, and manufacture rotomouldings to meet your companies specific qualifications. An easy connection to reach rotomoulding companies through our fast request for quote form is provided on our website. The company information includes website links, company profile, locations, phone, product videos and product information. Customer reviews are available and product specific news articles. This source is right for you whether it's for a manufacturer of rotomoulding tanks, rotomoulded tubing, and thermoplastic fabrication.

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  • Why Rotational Molding

    Rotomoulding Rotomoulding, or rotational molding is the process of forming a hollow object using a closed split mold. Plastic pellets are placed into the molding chamber, then heated and mounted on a rotational station. The rotational molding machine spins around, first slowly than faster as the pellets inside the mold melt. This causes the melted plastic to coat the entirety of the mold evenly. The heat is then turned off, and the machine continues to rotate until the plastic hardens. The product can then be removed from the mold. Although...

  • The Sweetness of Rotational Molding

    Rotomoulding One of the best processes to create bulk plastics is rotational molding. Because roto moulders keep the plastic resin within it in nearly constant motion, the plastic takes shape evenly. Of course the benefit of evenly shaped plastic pieces is that you do not have to worry about the product coming out of the mold malformed, which in turn saves both time and money. The other money saving element of using roto moulders is that you can meld various parts together very easily; roto moulders are capable of creating...

  • Rotomoulding and Martini Shakers

    Rotomoulding Imagine the following situation. Suppose you have in front of you a large, burning candle and an empty martini shaker. Suppose that there is enough melted wax in the burning candle that it would fill about an eighth of the volume of the martini shaker. Imagine now that you've poured the melted wax into the bottom of the martini shaker. If you were to swirl the melted wax around a little, you'd notice that some of the wax would stick to the sides of the shaker and quickly harden....

  • Rotomoulding and Innovation

    The industrial revolution is continuous, and we are still experiencing it. I don't mean to diminish the momentousness of those first decades of the human experience of industry. The jolts and growing pains of that time truly are history. But what we continue to learn about industry is that to be truly industrious is to be innovative; industry leaders become leaders by learning to adapt to changes in the industrial landscape, and it's a simple fact that the landscape is always changing. It turns out that rotomoulding is helping industry...

  • Rotational Molding: The Plastic Industry's Biggest Untapped Resource

    by Jenny Knodell, IQS Editor There's a largely unknown secret lurking in the plastic molding industry. While injection molding, blow molding and thermoforming are the big 3 in terms of fabricating complex, three dimensional plastic products, an untapped resource is hiding. It's called rotational molding, and it takes an ancient process that the Swiss still use to manufacture hollow chocolate Easter eggs and applies it to plastic molding. Also called rotomolding, you might be surprised to learn that it's an effective method of fabricating many different products; anything from a...

Industry Information


Rotomoulding is a thermoplastic fabrication technique that manufactures hollow plastic 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. Rotomolded products include safety cones, plastic tanks, footballs, helmets, kayaks, playground slides, pipe fittings and outdoor planters.

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.

Rotomoulding - QI Rotomolding
Rotomoulding - QI Rotomolding

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