The Rise Of The Rotational Molding Industry
In recent years, a very popular molding method in blister molding is rotational molding. Rotational molding, also known as rotational molding, rotational molding, rotary molding, etc., is a hollow molding method for thermoplastic plastics.
Rotational molding originated in the United Kingdom in the 1940s. The first rotational molding patent was issued in 1887, and the first commercial rotational molding machine was manufactured in 1934. At first, it was only used as a supplement to injection molding, blow molding, and extrusion. With the maturity of polyethylene powdering technology, it has increasingly become a very competitive molding method in the plastic molding process.
In recent years, in developed countries in North America and Europe, the rotational molding industry has developed rapidly, and its development speed is higher than the average development speed of the entire plastics industry. And the development of the entire rotational molding industry is relatively complete. In addition to rotational molding machine manufacturers and rotational molding product manufacturers, there are also a considerable number of other professional auxiliary factories, such as rotational mold manufacturers, release agent manufacturers, rotational molding special Pigment production plants, grinding machine manufacturers, insert manufacturers, and mixing equipment manufacturers suitable for rotational molding, as well as numerous rotational molding-specific raw material supply factories, etc.
PE bucket manufactured using rotational molding process
Generally speaking, the markets in the United States, Europe, and Australia are relatively mature, but new products and new technologies still bring new growth opportunities to the rotational molding industry. New equipment has high product quality and fast production speed, which still drives investment in new production lines and processing. Production moves to low-cost countries. Developing countries mainly focus on low-end products such as water tanks and storage tanks. The speed and level of development are restricted by the overall industrial base level. China is developing rapidly, and Asian countries such as India, Malaysia, Thailand, and Vietnam are also showing good development trends.
My country's rotational molding market
The development and research of rotational molding technology in my country began in the 1960s and started relatively late. In the mid-to-late 1990s, some domestic companies introduced advanced rotational molding equipment and technology from abroad before they began large-scale industrial production in the true sense. However, compared with the advanced level of foreign developed countries, the gap is still very obvious, which is reflected in: backward basic research, poor equipment control capabilities, backward technology, and insufficient diversity of rotational molding products.
According to statistics, there are more than 1,500 rotational molding product companies in my country; in the early 1970s, there were more than 500 companies engaged in the production of rotational molding products in the United States, with more than 500 rotational molding machines. In 1992, it was registered with the American Rotational Molding Association. There are more than 5,000 types of rotomolded products.
In terms of rotational molding raw materials, currently most domestic rotational molding products are mainly PE. The materials used in foreign rotational molding include nylon, PP, PC, ABS, etc.
However, after more than 20 years of development, my country's rotational molding process has basically matured and has obvious advantages compared with other processes. At present, it seems that it has modernized production for processing large hollow plastic products and special plastic products. The application fields are constantly expanding, and the rotational molding industry has made great progress. It should be said that the rotational molding industry has formed a complete industrial chain of raw materials, equipment, molds and product applications.
[Summary] Rotational molding technology has strong vitality and is a process worthy of great attention. The rotational molding process should be highly valued and applied to produce various cost-effective plastic parts. Actively digest and absorb advanced foreign technologies, and increase research on related processes, equipment and molds.