In recent years, in the plastic process, a molding method is very popular, that is, rotomolding processing. Rotational molding, also known as rotomolding, rotary molding, etc., is a method of thermoplastic hollow molding.
Rotomolding forming originated in England in the 1940s, the first rotomolding forming patent was published in 1887, and the first commercial rotomolding forming machine was manufactured in 1934. At first, it was only used as a supplement of injection molding, blow molding and extrusion. With the maturity of polyethylene powder technology, it has become a very competitive molding method in the plastic molding process.
In recent years, in the developed countries of North America and Europe, the rotomolding industry has developed rapidly, and its development speed is higher than the average development speed of the whole plastic industry. And the development of the whole roll molding industry is relatively perfect. In addition to the roll molding machine factory and the roll molding product factory, there are quite a number of other professional auxiliary factories, such as the roll molding mold factory, the mold release agent factory, the roll molding special pigment factory, the grinder factory, the insert factory and the mixing equipment factory suitable for the roll molding, as well as a large number of roll molding special raw materials supply Factories and so on.
1994 rotomolding plastic special committee meeting site
PE bucket made by rotomolding forming process
As a whole, the markets in the United States, Europe and Australia are relatively mature, but new products and technologies still bring new growth opportunities to the rotomolding industry. The quality of new equipment products is high, and the production speed is fast, which still drives the investment in new production lines, and the processing production is transferred to low-cost countries. The developing countries are dominated by low-end products such as water tanks and storage tanks. The development speed and grade are restricted by the overall industrial base level. China is developing rapidly. India, Malaysia, Thailand, Vietnam and other Asian countries are also developing well.
Our rotomolding market
As a whole, the markets in the United States, Europe and Australia are relatively mature, but new products and technologies still bring new growth opportunities to the rotomolding industry. The quality of new equipment products is high, and the production speed is fast, which still drives the investment in new production lines, and the processing production is transferred to low-cost countries. The developing countries are dominated by low-end products such as water tanks and storage tanks. The development speed and grade are restricted by the overall industrial base level. China is developing rapidly. India, Malaysia, Thailand, Vietnam and other Asian countries are also developing well.
The research and development of rotomolding forming technology in China started in 1960s. In the middle and late 1990s, some domestic enterprises introduced advanced rotomolding equipment and technology from abroad, and then began the real sense of large-scale industrial production. However, compared with the advanced level of foreign developed countries, the gap is still very obvious, which should be reflected in the following aspects: backward basic research, poor equipment control ability, backward technology, and insufficient diversity of roll molding products.
According to statistics, there are more than 1500 enterprises engaged in rotomolding products in China; in the early 1970s, there were more than 500 enterprises engaged in the production of rotomolding products in the United States, with more than 500 sets of rotomolding machines. In 1992, there were more than 5000 kinds of rotomolding products registered with the American rotomolding Association.
Mr. Huang quanchun attended the third China international rotational molding technology and application BBS and exhibition
At present, PE is the main raw material in rotomolding products. And the materials used in overseas rotomolding include nylon, PP, PC, ABS, etc.
However, after more than 20 years of development, China's rotomolding technology has basically matured, and has obvious advantages in distinguishing from other technologies. At present, it has been equipped with the modern production of processing large hollow plastic products and special plastic products, and the application field is constantly expanding. The rotomolding plastic industry has made great progress. It should be said that the rotomolding industry has formed a complete industrial chain of raw materials, equipment, molds and product applications.
Rotomolding forming technology has a strong vitality, which is a process worthy of high attention. We should pay high attention to rotomolding forming technology, and use rotomolding forming technology to produce all kinds of high cost-effective plastic parts. Actively digest and absorb foreign advanced technology, and increase the research on related technology, equipment and mold.
