Rotational molding, also known as rotational molding, is a hollow molding method for thermoplastics. The process mainly involves two steps: first, the plastic raw material is added to the mold; then, the mold rotates continuously along two perpendicular axes while being heated. Under the influence of gravity and heat, the plastic raw material gradually and evenly coats, melts, and adheres to the entire surface of the mold cavity, forming the desired shape.
During rotational molding, attention must be paid to the rationality of the mold design to ensure uniform wall thickness and avoid stress concentration. The mold must be preheated to an appropriate temperature before construction to prevent raw material adhesion. Simultaneously, heating and rotation speeds must be strictly controlled to ensure uniform plastic distribution. After construction, the mold should be properly cleaned and maintained to extend its service life.
