Why more people choose roto-molded insulation boxes

Why more people choose roto-molded insulation boxes?

With the continuous development of rotomolding technology, the variety of rotomolded products has continued to increase, and the scope of applications has also continued to expand. More and more people are choosing rotomolded insulated boxes. So, why are more people choosing rotomolded insulated boxes now? The development and research of rotomolding technology in China began in the 1960s. However, despite this early start, rotomolded products were not put into practical use until the mid-1970s. By 1992, although there were dozens of rotomolding factories in China, most of them had only just reached the equipment and technology levels of the Western world in the 1950s and 1960s.

Although some plastics companies at the time were involved in rotomolding, they were constrained by key process limitations and could only produce relatively crude products without strict dimensional requirements or performance requirements. It wasn't until the mid-to-late 1990s that some domestic companies, after introducing advanced rotomolding equipment and technology from abroad, finally began truly large-scale industrial production. Rotomolding, also known as rotational molding, involves loading a fixed amount of powdered resin into a cold mold. The mold is then driven by a rotomolding machine to slowly orbit and rotate around two perpendicular axes while an external heat source heats the mold. This causes the resin powder to melt and, due to its own gravity, evenly coat the entire mold cavity. After cooling and demolding, the resulting hollow product is obtained.

Roto-molded insulation boxes have the following characteristics: 1. Roto-molded molds save on raw materials: Roto-molded products have relatively uniform wall thickness and slightly thicker chamfers, which can fully utilize the material's efficiency, helping to save raw materials and, in turn, save costs. For products of the same size, the cost of a roto-molded mold is approximately 1/3 to 1/4 of that of a blow molding or injection mold. In addition, during the molding process, there are no runners, gates, or other fertilizers. After commissioning, there is almost no return material during the production process, which makes the material utilization rate extremely high.

2. Roto-molded products have excellent edge strength. Roto-molding can achieve edge thicknesses exceeding 5 mm, completely resolving the issue of thin edges in hollow products. Furthermore, the shapes of roto-molded products can be very complex and are not limited to a single shape. If you are not satisfied with the wall thickness, there is no need to adjust the mold; the wall thickness of the roto-molded product can be freely adjusted (over 2 mm). 3. Roto-molding can accommodate various inlays and offer a variety of surface treatments, including various colors. It can also be treated with UV protection and anti-aging treatments, allowing for a variety of stone and wood simulation effects.

4. Rotomolding can produce fully enclosed products and can be filled with foam material to insulate items within the insulated box. 5. Rotomolding is suitable for forming products of various complex shapes. During the rotomolding process, the material is gradually coated and deposited onto the inner surface of the mold. The product has a strong ability to replicate the fine structures such as the patterns in the mold cavity. Furthermore, because the mold is not subject to external pressure during the molding process, methods such as precision casting can be used to directly produce molds with fine structures and complex shapes.

Compared to other mold processes, rotational molding offers greater design freedom. With the right design concept, several parts can be combined into a complete mold, significantly reducing high assembly costs. The rotational molding process also includes a range of inherent design considerations, such as how to balance sidewall thickness and how to enhance external features.

Rotomolding allows designers to create products with boundless creativity. Designers can choose the finest materials, including those approved by the China Food and Drug Administration. Additives can effectively protect against weathering, static electricity, and other external factors. Inserts, threads, handles, recessed features, and flawless surface finishes are all highlights of rotomolded products. Designers can also create multi-wall molds, allowing for either a hollow interior or foam-filled interior.