What are the advantages of rotational molding compared to other plastic processes

  1. Suitable for molding large and extra large parts

  The vast majority of plastic molding processes involve plastic and molds being subjected to considerable pressure during the molding process, such as widely used injection molding, compression molding, extrusion, blow molding, etc. Therefore, when using these molding processes to produce large plastic parts, it is not only necessary to use molds that can withstand high pressure, making the molds bulky and complex, but also plastic molding equipment must be designed and manufactured very firmly, increasing the difficulty and cost of machine mold processing and manufacturing. On the contrary, due to the rotational molding process only requiring the strength of the frame to support the weight of materials, molds, and the frame itself, as well as the closing force to prevent material leakage, even for large and extra large plastic parts, there is no need to use very bulky equipment and molds. The processing and manufacturing of machine molds is very convenient, with short manufacturing cycles and low costs. In theory, there is almost no upper limit on the size of parts formed by rotational molding process. It is impossible to produce such large plastic containers using blow molding without expensive and bulky blow molding equipment.
 
  2. Suitable for the production of multiple varieties and small batches of plastic products.
 
  Due to the fact that the mold used for rotational molding is not subjected to external forces, the mold is simple, inexpensive, and easy to manufacture. In addition, the rotational molding equipment also has great maneuverability. One rotational molding machine can install one large mold or arrange multiple small molds; It can not only mold parts of different sizes, but also simultaneously mold products of different sizes and shapes. As long as the raw materials used for the rotational molding products are the same and the thickness of the products is equivalent, they can be molded simultaneously. Therefore, the rotational molding process has greater flexibility compared to other molding methods.
 
  3. Roll molding can easily change the color of the product.
 
  Roll molding directly adds materials to the mold each time, which allows all materials to enter the product. After the product is removed from the mold, the materials needed for the next molding are added. Therefore, when we need to change the color of the product, we do not waste any drops of raw materials, nor do we need to spend time cleaning the machine and mold. When we use multiple molds to roll mold the same plastic product, we can also add materials of different colors to different molds and roll mold different colored plastic products at the same time.
 
  4. Suitable for forming hollow parts of various complex shapes.
 
  During the rotational molding process, the material is gradually coated and deposited onto the inner surface of the mold, and the product has a strong ability to replicate fine structures such as patterns on the mold cavity; At the same time, due to the fact that the mold is not subjected to external pressure during the molding process, precision casting and other methods can be directly used to produce molds with fine structures and complex shapes.
 
  5. Save raw materials.
 
  The wall thickness of the rotational molding product is relatively uniform and slightly thicker at the chamfer, which can fully utilize the efficiency of the material and help save raw materials; In addition, during the rotational molding process, there are no waste materials such as runners or gates. Once the debugging is done, there is almost no return to the furnace during the production process, so this process has a high utilization rate of materials.