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What are the benefits of rotational molding process to the production line?

By admin In Art, News Posted 2023-03-29

Compared with injection molding, blow molding (a fast developing plastic processing method), extrusion and other common molding methods, what are the key advantages of rotational molding process?

(1) Suitable for molding large and extra large parts

Most of the plastic molding process in the whole molding process, raw materials and molds are under very high pressure (pressure), such as the use of common injection molding, extrusion, blow molding, etc., so when using this molding process to produce large plastic parts, not only the mold which can bear very high pressure must be used to make the mold heavy and complex, but also the plastic molding equipment must be designed The scheme and manufacture are very solid, the difficulty of machining and manufacturing the machine mold is relatively increased, and the cost is rising. On the contrary, because the rotational molding process only requires that the strength of the frame is sufficient to support the net weight of the material, the mold and the frame itself, as well as the closing die force to avoid material leakage, even if the rotational molding large and oversize plastic parts do not need to use very heavy equipment and mold, the processing and manufacturing of the mold is very convenient, the manufacturing cycle is short, and the cost is low.

Theoretically speaking, there is no limit on the specifications of the parts formed by rotational molding. It is impossible to produce such large plastic utensils without expensive and huge blow molding equipment.


(2) It is suitable for the production of many kinds and small batch of plastic products (structure: synthetic resin, tackifier, stabilizer and dye)

Because the mold for rotational molding is free from external force, the mold is simple, high quality, low price and easy to manufacture. In addition, rotational molding equipment also has great mobility. A rotational molding machine can not only install a large mold, but also distribute several small chess pieces. It can not only mold products with different sizes, but also mold products with extremely different sizes and shapes. As long as the raw materials of rotational molding products are the same, and the product thickness is very high, it can also be rotational molding, Therefore, rotational molding process has higher mobility than other molding methods.

(3) It is suitable for forming various complex hollow parts

In the whole process of rotational molding, the materials are slowly coated and piled up on the inner surface of the mold, and the product has strong copy ability for the fine structure such as the grain on the die cavity. In addition, because the mold is not subject to external pressure in the whole process of molding, it can immediately choose casting and other methods to make the mold with fine structure and complex appearance.

(4) Saving raw materials

The thickness of rotational molding products is relatively uniform and the chamfering is slightly thick, so the efficiency of materials can be fully used, which is conducive to saving raw materials; in addition, in the whole process of rotational molding, there is no runner, rubber inlet and other wastes, once adjusted, there is basically no furnace charge in the production process, so the process has a high utilization rate of materials. Rotational molding is a very general manufacturing process with market. It will give you a higher design space, and all you need to invest is a very low production cost.

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