Rotational molding is an efficient plastic molding technique that’s used to make one-piece hollow items. It is also known to many as rotomolding, which is different from injection molding. The manufacturing process involves the use of heat and rotation. Here are some of the other facts, benefits and details at a glance.
Understanding the process
Rotomolding is different from other techniques used for plastic molding. In this case, hollow molds, made of stainless steel or aluminum, are manufactured as required. The molds are then filled with powder or liquid resin and heated in a high-temperature oven. The mold rotates in the oven, and the high temperature helps the polymer to melt and coat the entire internal surface. This helps in getting the right shape for the final product. After the fusing is done, the mold is then cooled down, and the plastic product is taken out. The whole process takes less production hours as compared to some of the other molding techniques.
Types of molds and polymers used
Molds can be created according to their requirements, and as mentioned, most molds are made of stainless steel or aluminum, although the latter is more common. Manufacturers can produce a broad range of complex shapes and designs with cast aluminum, and there is no restriction with regards to size either. From water containers to smaller products, everything can be made with this technique. With cast aluminum, one gets the advantage of malleability, strength and heat transfer. You can check more on custom rotational molding here. As for the polymer, polyethylene is the most used material, although it is possible to use polypropylene compounds and nylons. Polyethylene is easily available, and the properties of the compounds make them an easier choice.
Why Rotational molding?
Rotational molding is useful for various reasons. First, it offers incredible design flexibility, which makes it possible to create almost any kind of product. The output of the production process is much better, and the manufacturers have less labor costs. If you compare the technique with other plastic molding methods, the molds are considerably cheaper, which adds to the profits. It is possible to make products with consistent wall thickness, and therefore, one can get all sorts of custom items. Not to forget, there is very little material wastage with Rotomolding.
Placing an order
If you have a small business or need specific plastic parts, you can approach a few companies that specialize in Rotomolding. Most companies will accept available molds for production, and if required, their experienced team of engineers can help in getting the molds made to specifications. In case you have been making plastic products with other techniques, you can talk to experienced manufacturers about creating the same products with Rotomolding. For large orders, the costs will be much lower than what you would need in the case of injection molding.
You can check online to know more about making products with Rotomolding. Talk to a few manufacturers about your requirements, and they can do the required research for your order. Also, you can ask for sample products if needed.