Rotational or Roto Molding: Process Overview

2025-05-22

The process is simple; however, it can be rather complex in actuality. It starts with putting plastic powder into a hollow mold which is normally made out of cast aluminum or sheet steel. The mold is then closed and rotated on two axes while the mold is being heated in an oven. When the plastic powder is heated it spreads all over the inside of the mold in the required manner. After complete melting, the mold is transported to a cooling area where it cools through the blowing of air and a fine water mist. On attaining the required temperature, the mold is opened, and the frozen part is taken out.

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In its basic form, rotational molding is not a difficult process; however, because there is no direct control of pressure as is the case with high pressure processes such as injection molding, the process is relatively intricate. Some common parameters that can affect the molding process include the temperature of the environment, relative humidity, type of mold, material used, and quality of the powder used.

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Rotational or Roto Molding: Process Overview

Rotational or Roto Molding: Process Overview