How to utilize the advantages of rotational molding products
The vast majority of plastic molding processes, during which plastics and molds are subjected to considerable pressure (pressure), such as injection molding, compression molding, extrusion, blow molding, etc., are widely used. Therefore, when using these molding processes to produce large plastic parts, not only must molds that can withstand great pressure be used, making the molds bulky and complex, but also plastic molding equipment must be designed The manufacturing is very firm, and the difficulty of machining and manufacturing the machine mold correspondingly increases, resulting in increased costs.
On the contrary, due to the fact that the rotational molding process only requires the strength of the frame to support the weight of the material, mold, and frame itself, as well as the clamping force to prevent material leakage, even large and oversized plastic parts do not require the use of very bulky equipment and molds. The machining and manufacturing of the machine mold is very convenient, with a short manufacturing cycle and low cost. In theory, there is almost no upper limit on the size of parts formed by the rotational molding process. It is impossible to produce such a large plastic container using blow molding without the need for expensive and bulky blow molding equipment.
Roll forming
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. A 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 shape products of extremely 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 formed simultaneously. Therefore, the rotational molding process has greater flexibility compared to other molding methods.
Rotational molding directly adds materials to the mold each time, which allows all materials to enter the product. After being removed from the mold, the materials required for the next molding are added. Therefore, when we need to change the color of the product, we do not waste any raw materials, nor do we need to spend time cleaning the machine and mold. When we use multiple molds to roll shape the same plastic product, we can also add different colored materials to different molds and roll shape different colored plastic products.
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 the fine structures such as patterns on the mold cavity; Meanwhile, 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.
Save raw materials. The wall thickness of rotational molded products is relatively uniform and the chamfer is slightly thicker, so it can fully utilize the material's efficiency and is conducive to saving raw materials; In addition, during the rotational molding process, there are no waste materials such as runners and gates. Once debugged, there is almost no furnace material returned during the production process, so the utilization rate of materials in this process is extremely high.