Hot runner industry analysis
In recent years, hot runner technology has been gradually promoted in China, in large part due to the rapid export of domestic plastic extrusion molds to European and American companies. In Europe and the United States, injection molding production has relied heavily on hot runner technology. It can be said that molds that do not use hot runner technology are now difficult to export, but because many imported hot runner molds are expensive, many domestic plastic extrusion products manufacturers accept No, so there are some domestic commercial hot runner molds, which is of great benefit to the promotion of hot runner technology in China.
The hot runner is heated to ensure that the plastics of the runners and gates remain molten. Since the heating rod and the heating ring are arranged in the hot runner attachment or the center, the entire flow path from the nozzle exit of the injection molding machine to the gate is in a high temperature state, so that the plastic in the flow passage is kept molten, and it is generally unnecessary to open the flow passage to take out the condensation after the shutdown. It is only necessary to heat the flow path to the required temperature at the time of starting up. Therefore, the hot runner process is sometimes referred to as a hot manifold system, or as a no-flow molding.
Hot runner technology is an advanced technology used in plastic injection molding casting flow channel system. It is a hot spot for the development of plastic injection molding process. The popular use in Europe and the United States can be traced back to the middle of the last century or even earlier. The promotion is only a matter of recent years.
With the increasing application of hot runner technology, the weight of hot runner molds in plastic molds will gradually increase. “The International Model Association Secretary Luo Baihui said that in foreign countries, more than 50% of the molds produced by many extrusion plastic mold factories use heat flow. Road technology, some even more than 80%, the effect is very obvious, hot runners have also been used in production in China, but currently less than 10% overall, this gap is quite huge, but it also means that the industry has considerable room for development in the country.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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