Aluminium moulds, the success of rotational moulds
Perfect for producing objects with complex shapes, even of larger sizes. Rotational moulds allow for the creation of extremely durable finished products that have an entirely uniform thickness and are free of internal stress.
Rotational moulds in aluminium are used to produce hollow objects (both open and closed), with no need for welding operations to be performed.
The resulting finished products and components in plastic can even be quite large and complex in shape.
In addition to items for the automotive, agricultural, and home furnishings industries (for example), these products also include vases, toys, furnishing accessories, and various other types of objects.
In addition to eliminating the need for welding, this technology also provides for the creation of more durable items with no internal stress, and with entirely uniform thicknesses.
How do rotational moulds work?
In concrete terms, rotomoulding, or rotational moulding, requires the plastic material to be poured into a "rotational" mould, which is then made to rotate while maintaining an internal temperature that will allow the plastic to melt and adhere to the walls of the mould itself.
During the subsequent cooling phase, the plastic material is solidified, and thus assumes the shape of the mould. At this point, it is ready to be extracted.
What are the methods of rotational moulding?
When we talk about rotational moulds, we're referring to two particular methods:
- Centrifugal casting, in which the molten plastic material is first cast within a mould with the help of centrifugal force, which in turn causes it to adhere to the sides and take on the shape of the mould, after which it is cooled and solidified.
- Rotomoulding, which is similar to centrifugal casting, but is more commonly used to manufacture object of larger sizes. In this case, molten plastic polymer is poured into the metal mould.
Rotational moulding in aluminium is ideal for obtaining extremely durable finished products that have an entirely uniform thickness and are free of internal stress.