Rotational mold
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Rotational mold Molds are manufactured from electro-formed nickel, vapor deposited nickel, and cast aluminum. The thickness of the parts is controlled by heat sinks fabricated into the tool. The tool must be temperature controlled so it will cure the resin within it.
All types of rotational molds have several things in common. They are relatively low in cost when compared to other type molds, such as those used for blow or injection molding.
Rotational molds are usually shelltype molds that define the outside shape and surface of the part. These molds do not have internal cores and the inside shape of the surface of the part is determined by the outside shape of the part and the varying thicknesses of the part wall.
The designer of molds for rotational molding must give careful consideration to heat transfer, as the mold must be heated and cooled during the course of each molding cycle. Designing for high thermal conductivity often dictates the choice of material for mold construction.
