All Categories

Home > News

The Plastic Rotational Molding Process & Advantages

By admin In Art, News Posted 2023-03-14

Rotational molding is a versatile manufacturing option with many benefits over standard thermoform, injection and blow molding. This process makes it possible to design very large hollow pieces in virtually any shape, size, color and configuration. Generally, pieces are lightweight with strong structural integrity.

The process uses a variety of mold types and molding machines that contain loading, heating and cooling areas. Once a mold is bolted to one of the machine’s rotating arms, the pre-measured plastic resin is loaded. Several molds on as many as three arms can be used at the same time. The molds then move into the oven and rotate on both the vertical and horizontal axis. The melting resin adheres to the mold and lays down a thick even coating, filling in areas that need more structure. The rotating continues during the cooling cycle where the part retains an even thickness.

Advantages of Rotational Molding

parts originally assembled from several pieces can be molded as one piece.

manufacturers can produce consistent, stress-free wall thickness and strong outside corners.

engineers can select the best materials and additives for their application making the parts weather resistant, flame retardant, or static free.

designers have the option of adding inserts, threads, handles, minor cuts and fine surface detail.

large and small parts can easily be produced. Since there is no internal core, minor changes can be made to existing molds making the process more cost effective. Parts are formed with heat and rotation, unlike injection molding, which requires high pressure.

material and production costs are lower because lightweight materials replace heavier and often more expensive materials.

manufacturers can get their product through prototyping and to market quickly.

Hot categories