In moldability.
1) Our products feature uniform wall thickness, with no burrs or welds, and can be formed into items with a wide range of wall thicknesses, such as polyethylene rotomolded parts, which can range from 1 to 16mm. However, due to viscosity, forming thick-walled products is more challenging. The rotomolding process is particularly suitable for molding plastic parts with a thickness of 2 to 5mm.
2) Generally, only hollow or shell products can be produced, with difficulty in processing solid products. Moreover, the surface condition of the products is highly dependent on the mold cavity surface.
3) The dimensional accuracy of rotational molding products is relatively low, typically ±5%.
In the molding process aspect
(1) Suitable for molding large and extra-large parts. Since the rotational molding process only requires the frame to be strong enough to support the weight of the material, mold, and the frame itself, as well as the clamping force to prevent material leakage, even for processing large and extra-large plastic parts, there is no need for excessively heavy equipment and molds. Therefore, theoretically, there is almost no size limit to the products made by the rotational molding process.
(2) Ideal for the production of a variety of plastic products in small batches—due to the simple and cost-effective structure of molds used in rotational molding, product changes are extremely convenient.
(3) Ideal for processing complexly shaped large hollow products, which is unparalleled by other molding processes.
(4) Plastic products are easy to change color; simply clean the molding mold when a color change is needed.
(5) The main drawbacks of rotational molding include: high energy consumption, as molds and frames must undergo repeated heating and cooling cycles during each molding cycle; longer molding cycles, due to the reliance on plastic heat conduction under static conditions, resulting in extended heating times; greater labor intensity; and lower dimensional accuracy of the finished products.
