Is rotational molding cheaper than injection molding?

1, Cost advantages of rotational molding molds
The cost advantage of rotational molding molds is mainly reflected in the following aspects:
Material cost: Roll forming molds usually adopt relatively simple structural design and lower material requirements, so the material cost is relatively low. Compared with injection molds, roll forming molds do not require the use of expensive special alloy materials, but can use more economical ordinary steel or aluminum materials.
Processing cost: The processing process of rolling plastic molds is relatively simple and does not require complex cutting, milling and other processing procedures. This greatly reduces the processing cost of the rotational molding mold. In contrast, the processing of injection molds is more complex, requiring high-precision processing equipment and professional technical personnel, resulting in higher processing costs.
Mold lifespan: The lifespan of rotary molding molds is usually longer and can be used multiple times without the need for frequent replacement. This is because the rotational molding mold is subjected to less pressure and wear during the forming process, so it can maintain stability for a longer period of time. Injection molds, working in high-pressure and high-temperature environments, are prone to damage and wear, requiring more frequent replacement.
2, Cost composition of injection molds
In order to better understand the cost advantages of rotational molding molds, we need to provide a brief introduction to the cost composition of injection molds. The cost of injection molds mainly includes the following aspects:
Material cost: Injection molds require the use of special alloy materials, such as stainless steel, high-temperature alloys, etc. These materials are expensive and account for the majority of the mold cost.
Processing cost: The processing of injection molds is complex and requires multiple processes such as cutting, milling, grinding, etc. These processes require high-precision processing equipment and professional technicians, resulting in higher processing costs.
Design and engineering costs: The design and engineering of injection molds require a significant investment of time and resources. This includes the salary of mold designers, the cost of design software and engineering equipment, as well as the cost of testing and verifying molds. These costs are also an important component of mold costs.
3, Cost comparison between rotary molding and injection molding
By comparing and analyzing the cost composition of rolling plastic molds and injection molds, we can find that rolling plastic molds do have cost advantages. Specifically manifested in the following aspects:
Material cost: The material cost of rotational molding molds is relatively low, while injection molding molds require the use of expensive special alloy materials.
Processing cost: The processing process of the rolling plastic mold is simple, and the processing cost is relatively low; The processing process of injection molds is complex and the processing cost is high.
Mold lifespan: Roll forming molds have a longer lifespan and can be used multiple times; Injection molds, working in high-pressure and high-temperature environments, are prone to damage and wear, requiring more frequent replacement.
4, The application prospects of rotational molding molds
The cost advantage of rotational molding molds makes them widely applicable in certain fields. For example, in the production of large, hollow, and uniformly thick plastic products, roll forming molds can play their unique advantages. In addition, with the increasing awareness of environmental protection and the rise in energy prices, the energy-saving and environmental protection characteristics of rotary molding molds will also receive more attention and recognition.