1. Suitable for molding large and extra large parts
The vast majority of plastic molding processing technology, during the molding process, the plastic and mold are under a relatively high pressure (pressure), such as extremely widely used injection, compression molding, extrusion, blow molding, etc., so these moldings are used When producing large plastic parts by technology, not only must a mold that can withstand a lot of pressure be used, making the mold cumbersome and complicated, but also the plastic molding equipment must be designed and manufactured very firmly, and the difficulty of processing and manufacturing the machine mold increases accordingly. Increased costs. On the contrary, because the rotomolding process only requires the strength of the frame to support the weight of the materials, molds and the frame itself, and the closing force to prevent the leakage of materials, so even large-scale and extra-large plastic parts are not necessary Using very bulky equipment and molds, machine mold manufacturing 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 rotomolding process. The production of such large plastic containers, such as blow molding, is impossible without very expensive and bulky blow molding equipment.
2. Applicable to the production of many varieties and small batches of plastic products.
Because the mold for rotomolding is not affected by external forces, the mold is simple, inexpensive and easy to manufacture. In addition, the rotomolding equipment also has greater mobility. A rotomolding machine can install a large mold or arrange multiple small molds; it can not only mold parts of different sizes, but also at the same time. For products with very different sizes and shapes, as long as the raw materials used in the rotomolded products are the same and the thickness of the products is equivalent, they can be rotomolded at the same time, so the rotomolding process has more flexibility than other molding methods.
3. Rotational molding is very easy to change the color of the product.
Rotational molding adds materials directly to the mold each time, which makes all the materials enter the product. After the product is removed from the mold, the materials needed for the next molding are added. Therefore, when we need to change the color of the product, we will not waste it. It doesn’t take time to clean the machines and molds for the raw materials. When we use multiple molds to rotationally mold the same plastic product, we can also add materials of different colors to different molds, and at the same time rotomold plastic products of different colors.
4. Suitable for molding hollow parts of various complex shapes.
During the rotomolding process, the materials are gradually coated and deposited on the inner surface of the mold. The product has a strong replication ability for the fine structures such as the patterns on the mold cavity; at the same time, because the mold is not affected by the outside during the molding process Pressure, you can directly use precision casting and other methods to make a mold with a fine structure and a complex shape.
5. Save raw materials.
The wall thickness of the rotomolded products is relatively uniform and the chamfers are slightly thicker, so it can give full play to the effectiveness of the materials and help to save raw materials. In addition, in the rotomolding process, there is no waste such as runners and gates. In the production process, almost no charge is returned, so the utilization rate of the process for the material is extremely high.