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Advantages of rotational molding process


source:Foshan Rotomolding|Rotational Molding Processing|Rotational Molding-Shunde Zhongze Mould date:2020-10-21 13:57

Suitable for molding large and extra large parts.


Most of the plastic molding process, in the molding process, the plastic and mold are under a very high pressure (pressure), such as injection molding, compression molding, extrusion, blow molding, etc. Therefore, when using these molding processes to produce large plastic parts, not only must the mold which can bear a lot of pressure be used to make the mold become bulky and complex, but also Plastic molding equipment must also be designed and manufactured very firmly. The processing and manufacturing difficulty of the machine mould increases correspondingly, and the cost increases. On the contrary, because the rotational molding process only requires that the strength of the frame is enough to support the weight of the material, the mold and the frame itself, as well as the closed mold force to prevent material leakage, even large and extra large plastic parts do not need to use very bulky equipment and molds. The processing and manufacturing of machine molds is very convenient, the manufacturing cycle is short, and the cost is low. Theoretically speaking, there is almost no upper limit on the size of parts formed by rotational molding process. It is impossible to produce such a large plastic container without expensive and huge blow molding equipment.


It is suitable for the production of various kinds and small batch of plastic products.


Because the mold for rotational molding is not affected by external force, the mold is simple, cheap and easy to manufacture. In addition, the rotational molding equipment also has greater mobility. A rotational molding machine can install a large mold or arrange a number of small chess pieces. It can not only mold parts of different sizes, but also shape products with very different sizes and shapes at the same time. Only when the raw materials used for the rotational molding products are the same and the thickness of the products is the same, they can be rolled at the same time Rotational molding process has more flexibility than other molding methods.


Rotational molding is easy to change the color of products.


In rotational molding, the materials are directly added to the mold each time, which makes all the materials into the products. After the products are taken out of the mold, the materials needed for the next molding are added. Therefore, when we need to change the color of the products, we do not waste any raw materials, nor need to spend time cleaning the machine and mold. When we use multiple molds to roll form the same kind of plastic products, we can also add materials of different colors into different molds, and at the same time, we can roll plastic products of different colors.


All kinds of hollow parts are suitable for complex shapes.


In the process of rotational molding, 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 not subject to external pressure in the molding process, precise casting and other methods can be directly used to produce the mold with fine structure and complex shape.


Save raw materials.


In addition, once the raw material is not fully utilized in the process of molding, the material at the roll gate is not fully utilized, so it is not conducive to the utilization of the raw material in the molding process.