What are the common operating methods of rotational molding technology?

What are the common operating methods of rotational molding technology?

The common operation methods of rotational molding technology are as follows:

Mold preparation
Apply release agent: Apply release agent evenly on the mold to facilitate the subsequent removal of the product from the mold, and avoid the product damage during demolding due to the strong adhesion between the product and the mold.
Installation of inserts and molding accessories: Install inserts in the mold for local reinforcement of parts; install molding accessories such as modules for molding threads or special parts on the mold. These operations must be completed before adding materials to the mold.
Adding materials
Measuring: Strictly measure before adding materials, and accurately weigh the weight of powder resin required for the final product. If additives need to be added, the relevant components must be premixed.
Loading: Add the weighed material to the bottom of the split mold, then tighten the two half molds together and install them on the bearing shaft.
Heating
Closing the mold: Before closing the mold, remove the remaining material at the mold to ensure that the two parting surfaces are tightly fitted to prevent material leakage during processing.
Heating and rotating: Put the mold with the material into the heating furnace, or heat it with other heat sources such as gas flames. The temperature of the heating furnace is set above the melting point of the resin, and the mold rotates around the main and auxiliary axes that are perpendicular to each other. During the rotation, the mold is heated to a given temperature and then kept warm. The material gradually melts under rotation and heating, and settles on the entire inner wall of the mold cavity and gradually removes the gas trapped in the material until a well-formed part is formed.
Cooling and shaping
When the resin is fully melted, the mold is transferred to the cooling room, and while continuing to rotate, it is cooled by forced ventilation or water spraying to harden and shape the product.
Demolding and cleaning
Demolding: After cooling, stop the mold rotation, open the mold, and take out the product. Be careful not to damage the product during demolding.
Cleaning the mold: Clean the remaining materials and debris on the mold to prepare for the next molding cycle.