Sheet Steel Rotational Molds

Rotational molding Sheet steel, stainless steel, almninum, cast almninmn, machined metal, electroformed nickel and copper... 

Molds from aluminum (aluminum casting and CNC-milled) or sheet steel are used today for rotational molds. Electroplated molding has established itself for special rotational molds for PVC plastisols. There are also a couple of other materials that can be used in prototype production. 

If the manufacturing practices show that the walls of the part are uneven, a remedy can be found through the installation of auxiliary panels made from sheet metal, through painting with aluminum colors, or through wall thickness modifications of rotational mold. Inserts made from plastic material or steel can be fixed into the walls of the molded parts, but must be preheated to initial temperature of the mold. It is important that the pins, which are necessary for the acceptance, are properly installed so that no plastic can leak at these points during the rotation. 

The equipment used in rotational molding is relatively unsophisticated and inexpensive compared to other polyethylene-molding techniques. Molds are subjected to low stresses and can therefore be constructed of relatively lightweight and low cost materials such as sheet steel or cast aluminum, the latter being used for smaller items. Temperature and time regulation are not as critical as in other... 

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