What are rotomolded coolers, rotational molding and how are they different from injection-molded coolers or injection molding?
What is Rotomolding?
As you shop for an ice chest, you are likely to encounter certain phrases an awful lot. “Rotomolded coolers” is one of them. What does it mean? Well, rotomolding is a process of forming plastic material into a desired shape. The RovR coolers, and some other high-end coolers like Rtic and Yeti, have rotomolded bodies. Simply put, rotomolding, short for “rotational molding,” fills a mold with heated plastic and rotates it to achieve an even, consistent coat of firm plastic along the entire body of the cooler. In order to appreciate rotomolding and the advantages of a rotomolded cooler like the RovR RollR 80, we need to understand first some of the other ways of turning raw plastic material into a cooler. It’s more interesting than you think, but we’ll still explain it quickly.
What is Injection Molding?
The most common method for constructing the body of a wheeled cooler or ice chest, along with rotomolding, is injection molding. It works pretty much exactly as it sounds. A mold is filled with melted plastic, then the shape is cooled and ejected. It’s an inexpensive and flexible way to make a product, but it doesn’t maximize the strength of joints and corners. Frequently with injection molding, a number of smaller pieces are molded and then assembled, which results in more joints, corners, and stress points and more opportunities for wear, breakage, and corrosion.
What Are Blow Molding and Thermoforming?
Blow molding is like glass blowing. A heated plastic mass is filled with air until it expands to fill a mold, then is cooled and ejected. Fewer coolers are made this way. This process yields products of inconsistent thickness.
With thermoforming, a plastic sheet is heated to until it’s pliable, molded into shape, then trimmed. These methods carry many of the same disadvantages as injection molding.
In more detail, here’s how rotomolding or rotational molding works. The inside of a mold is coated with raw plastic material–usually more versatile, more expensive polyresin pellets. The mold is then rotated in an oven along its vertical and horizontal axes ensuring an even distribution of the material. The result is an end-product with consistent thickness, especially at its corners and stress points. This process takes a little longer than other common plastic molding methods like injection-molding, but yields a stronger, more durable coolest cooler.
Advantages of Rotomolded Coolers
There are a number of advantages to using rotomolding for coolers. RovR maximizes those advantages with the RollR 80 series of rolling coolers.
Consistent wall thickness, for example, allows RovR the precision required to ensure an even distribution of two full inches of thick foam insulation throughout the body of the cooler. Using rotational molds permits a more complex design geometry. Rotomolded coolers can have more unique shapes. This allows RovR to maximize key elements like effective drainage, advanced maneuverability, and ergonomic toting and hauling. One-piece construction on a rotomolded cooler means fewer joints, fewer corners, fewer stress points and less opportunity for wear and breakage. One-piece construction also minimizes opportunities for corrosion at bolts and hinges. The heavier, more durable plastics make for a consistently stronger cooler that will last.
Rotomolding is also a more environmentally responsible process, yielding less wasted material than other methods.
Disadvantages of Rotomolded Coolers
High-end rotomolded coolers are a little heavier. The RovR RollR 80 is supplied with high-performance all-terrain tires, and an offset dual aluminum handle.
And Now You Know!
Rotomolded coolers, like the RovR RollR 80, are coolers that have had their bodies constructed by a process of rotating and coating molds with high quality plastics. This process increases strength and durability. The design versatility of rotomolding also contributes to consistent wall thickness and quicker, more thorough drainage. The RovR RollR is a rotomolded cooler that is designed to last, and to make sure that its contents last, as well.