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The process is simple in concept--it is a three stage, no pressure, plastic molding process. In the first stage, a closed, hollow cavity mold is rotated on two axes at a low speed inside an oven where heat is used to penetrate the mold surface so as to melt and fuse a plastic resin to its interior surface; in the second stage, the mold is moved into a cooling
station and while continuing to rotate is cooled to solidify the plastic material; in stage three, the mold is moved into a load/unload station where it is opened and the plastic part is removed. Plastic powdered is then placed back inside the mold cavity so that the process can begin again.
Rotational molding technology has expanded the capabilities of polymer product manufacturers by enabling them to create light-weight, seamless, stress-free parts of virtually any size in the most complex shapes. Typically, products that would need to be assembled from multiple different pieces in other processes can be molded as a one piece part--resulting in a significant cost savings.
A variety of materials are available to provide
specific characteristics with the most widely used being polyethylenes, plastisols, polypropylene, EVA, nylons, polycarbonates, and many other specially formulated compounds.
Colors are only limited by your imagination. Since there are no lines to clean, many parts are produced in multiple different colors without the need for additional tooling.
Graphics, decals, and labels can be molded right into the plastic part making them virtually
indestructible and non-removable.
Metal inserts for the installation of fasteners, nuts/bolts, handles/latches, etc. can be molded right into the plastic part providing superior pull out strength.
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