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Carrousel Machine Process From
- Oct 12, 2017 -

carrousel machine Process from

Rotational molding, also known as rotary molding or rotary molding, is a long history of plastic molding technology. It is reported that the core of the original process as rotational molding may begin with the manufacture of terracotta warriors in the Chinese Qin Dynasty. But as a plastic rotomoulding process originated in the United Kingdom, in 1887 the first rotomolding patent came out, 1934 to create the first commercial turntable. 50 years in Europe have been great development, and later gradually into the United States, Japan and other places. It is just a supplement to the injection molding process. With the maturity of polyethylene powder technology, plastic molding process has become increasingly competitive in the molding method. Since then, the rotomolding process continues to develop around the world

1. Foreign situation and development trend

In recent years, in North America, developed countries in Europe, the rotational molding industry has developed rapidly, its development rate is higher than the average growth rate of the entire plastics industry. The development of the entire rotomolding industry is also relatively complete, in addition to turntable factory and rotomolding production plant, there are a considerable number of other professional auxiliary plants, such as rotomoulding mold factory, release agent production plant, rotomolding special pigments Production plants, milling machine manufacturers, insert manufacturers and suitable for rotomolding of the mixing equipment factory, there are a large number of rotomolding special raw materials supply plant and so on. Developed countries, the rotomolding equipment manufacturing more and more sophisticated, toward the level of automation and control the direction of continuous development.

At present, with the rotational molding equipment can produce not only a simple structure, a single layer of small products, but also the production of complex structures, multiple layers, large and very large products, including container class products, motor vehicles and other motorized aircraft tool accessories, military supplies, Ships, and human organs and so on.

From the turntable heating point of view, the most commonly used only two categories, direct fire and hot box heating. Production of large-scale products with multi-purpose direct heating, that is, direct heating heating swing turntable; production of small and medium-sized products using hot box heating, the most common models are hot box heating swing turntable, hot box heating 2 arm shuttle turntable, 3-4 arm tower turntable, hot box heating "mussels" type dial machine in recent years, rapid development.

Developed countries in addition to the turntable models continue to improve, but also vigorously improve the turntable control level. Here in particular, in 1991, the British Northern Ireland Rotational Molding Systems and Canada Exxon Chemical Company to develop a successful Rotolog rotomolding process diagnostic system. The system has been improved by a few improvements. The system includes two parts of temperature measurement and control display. Temperature seal portion may be mounted to the frame of a heat insulating box mold, by radio thermocouple measured the temperature in the mold is sent to the real-time monitoring of the computer outside the hot box, the computer displays the mold temperature / time profile. The curve is compared with the temperature / time curve in the hot box, which can visually display the real-time condition of the mold and the heat transfer of the mold during the rotational heating process. Operators can use this optimization heating, cooling cycle, improve and ensure the quality of plastic products, so that products to maximize the strength and reduce production costs, but also more accurate evaluation of mold and new materials.