Briefly describe the advantages of rotomolding process
Suitable for molding large and extra large parts.
As far as most plastic molding processes are concerned, plastics and molds are under relatively high pressure (pressure) during the molding process, such as injection molding, compression molding, and extrusion. Blow molding, etc., therefore, when applying these molding processes to produce large-sized plastic parts, it is necessary not only to use a mold capable of withstanding a large pressure, but also to make the mold rough and complicated, and the plastic molding equipment must also be designed and manufactured very firmly, and the mold is molded. The difficulty in processing and manufacturing increases accordingly, and the cost increases. In contrast, since the rotational molding process only requires the strength of the frame to support the weight of the material, the mold and the frame itself, and the mold closing force to prevent material leakage, it is not necessary to rotate large and extra large plastic parts. The use of very cumbersome equipment and molds makes the machining of the machine very convenient, with a short manufacturing cycle and low cost. In theory, there is almost no upper limit in the size of the parts formed by the rotational molding process. It is impossible to produce such a large plastic container, such as blow molding, without using a very expensive and bulky blow molding device.
It is suitable for the production of multi-variety and small batch plastic products.
Since the mold for rotational molding is not subjected to an external force, the mold is simple, inexpensive, and easy to manufacture. In addition, the rotomolding equipment also has greater maneuverability. A rotomolding machine can be used to install a large mold or arrange a small number of small chess pieces; it can not only mold different sizes of parts, but also simultaneously For products with very different molding sizes and shapes, as long as the raw materials used in the rotomoulded products are the same, the thickness of the products is equivalent, and both can be rotationally molded, so the rotational molding process has greater maneuverability than other molding methods.
Rotational molding makes it easy to change the color of the product.
Rotational molding adds the material directly to the mold each time, so that all the materials are fed into the product. After the product is taken out of the mold, it is added to the material needed for the next molding. Therefore, when we need to change the color of the product, It doesn't waste a little bit of raw material, and it doesn't take time to clean the machine and mold. When we use more than one mold to shape the same plastic products, we can also add different colors of materials to different molds, and simultaneously rotate plastic products of different colors.
Suitable for forming hollow parts of various complex shapes.
During the rotomolding process, the material is gradually coated and deposited on the inner surface of the mold, and the product has a strong ability to reproduce the fine structure such as the pattern on the mold cavity; and at the same time, the mold is not subject to the outside during the molding process. Pressure, you can directly use precision casting and other methods to obtain a mold with a fine structure and complex shape.
Save raw materials.
The wall thickness of the rotomolded product is relatively uniform and the chamfer is slightly thicker, so that the material efficiency can be fully utilized, which is conducive to saving raw materials; in addition, in the rotomolding process, there are no wastes, gates, etc., once the debugging is completed, There is almost no charge back in the production process, so the process has a very high utilization rate of materials.
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