What are the advantages of rotomolding compared with other plastic processes
1. Suitable for molding large and extra large parts
Most of the plastic molding process, in the molding process, the plastic and mold are under high pressure (pressure), such as widely used injection molding, compression molding, extrusion, blow molding, etc., so when using these molding processes to produce large-scale plastic parts, not only must we use the mold that can bear a lot of pressure, so that the mold becomes cumbersome and complex, but also plastic The material forming equipment must also be designed and manufactured very firmly. The machining and manufacturing difficulty of the machine mould increases correspondingly, and the cost increases. On the contrary, because the strength of the frame is only required to support the weight of the material, the mould and the frame itself, as well as the closing force to prevent the leakage of the material, even if the large-scale and extra large-scale plastic parts are rolled, there is no need to use very heavy equipment and mould. The machining and manufacturing of the mould is very convenient, with short manufacturing cycle and low cost. In theory, there is almost no upper limit on the size of the parts formed by the roll forming process. It is impossible to produce such a large plastic container without expensive and huge blow molding equipment.
2. It is suitable for the production of many varieties and small batches of plastic products.
Because the mould for rotomolding forming is not affected by external force, the mould is simple, cheap and easy to manufacture. In addition, the rotomolding equipment also has greater mobility. A rotomolding machine can install a large mold or arrange several small molds. It can not only mold parts of different sizes, but also mold products of different sizes and shapes at the same time. Only the same raw materials, the same thickness of products, can be rotomolded at the same time. Therefore, it is necessary to Compared with other molding methods, the rotomolding process has greater mobility.
3. It is very easy to change the color of products by rotomolding forming.
4. It is suitable for forming hollow parts with various complex shapes.
In the process of rotomolding forming, the materials are gradually coated and deposited on the inner surface of the mold, and the products have a strong ability to copy the fine structure such as the pattern on the mold cavity; at the same time, because the mold is free from external pressure in the process of forming, the mold with fine structure and complex shape can be directly produced by precision casting and other methods.
5. Saving raw materials
The wall thickness of the rotomolding products is relatively uniform and the chamfering is slightly thick, so it can give full play to the efficiency of the materials, which is conducive to saving the raw materials; in addition, there is no waste such as runner and gate in the roltomolding forming process, once the commissioning is completed, there is almost no furnace material returned in the production process, so the utilization rate of the process for the materials is very high.