Hot runner technology, widely used plastic mold is a major change

Fu Lunke hot runner technology is used in plastic injection mold casting runner system of an advanced technology, the development of plastic injection molding hot direction. Secretary-General of the International Association mold Luobai Hui said, the increasing use in Europe and America can be traced back to the mid-century or even earlier, while in China, promote the use of this technology really is just a few years ago.http://www.prmindustry.com/Abstract...Articles section   By heating the hot runner is a way to ensure that the plastic runners and gates to keep the molten state. As the flow channel near the center is equipped with heating or heating rods and rings, from the injection molding machine nozzle exit to the gate of the flow channel are in a high temperature, so that flow of molten plastic to maintain, generally do not need to open down after removing condensate flow material, and then just add a boot to the desired temperature can be hot runner. Therefore, the hot runner process sometimes referred to as hot manifold system, or as non-runner molding.

    With the growing popularization and application of hot runner technology, hot runner mold plastic mold in the proportion will gradually increase. In other countries, many plastic mold factory produced more than 50% of mold with hot runner technology, some even more than 80%, the effect is very obvious. Hot runner in the country has also been used in the production, but overall less than 10%, the gap is huge, but it also means the industry in the country has considerable room for development.

    In recent years, hot runner technology in China gradually extended, largely due to European and American-made mold rapid export-led companies. In the United States and Europe, has been very dependent on the injection molding hot runner technology. It can be said, do not use hot runner technology, the basic mold is now difficult to export. However, imports of hot-runner mold as many more expensive, a large part of the domestic manufacturers can not accept, so there have been some domestic commercial hot runner molds. This hot runner technology in China to promote a great advantage.

    Hot runner technology in our country drifting hot, while showing a few of its components, the main development trends.

    The first component miniaturization. Component miniaturization, small products can achieve a multi-cavity and multi-gate filling large products. Space by reducing the nozzle can be configured on more in the mold cavity, to improve product yield and injection machine utilization, which is money that `time` of the modern plastics processing industry is very important. Mold companies MoldMaters internationally renowned companies to develop parts for the small nozzle, with the overall heater, tip and melt channel, the volume diameter of less than 9 mm from the gate is only 10 mm, can shape the quality of 1 to 30 grams of product .

    Second, standardized components. At present, mold design and manufacture of user requirements become shorter and shorter, standardized hot runner components, design work will not only help reduce duplication and reduce tooling costs, and facilitate the replacement of wearing parts and maintenance. Husky, Presto and MoldMaters companies such as nozzles, valve stem and the manifold is standard for quick replacement and delivery of the mold. Just four weeks abroad can now deliver the mold.

    Third, the design and reliable technology. Today, the major domestic and foreign companies on the hot runner mold design and hot nozzle plate connected part of the pressure distribution, temperature distribution, seals and other issues of research and development very seriously. Stack hot runner injection mold development and use is also hot. Stacked mold cavity can effectively increase the number, while the clamping force injection molding machine requirements only increase by 10% to 15%. Hot runner molds stacked in some foreign countries have to achieve industrialization.

    Fourth, precise temperature control system. In the molding hot runner mold, the development of more sophisticated temperature control devices, control panels and gate hot runner temperature in the molten resin, to prevent overheating of resin degradation and reduce the effective performance measures.

    Luobai Hui said hot runner technology, widely used plastic mold is a major change. In injection molding, which has a considerable number of unmatched advantages.
As the technology matures and further reduce manufacturing costs, hot runner technology will become increasingly apparent significant advantages. In recent years, the world's leading supplier of hot runner technology, one after another in various ways into the Chinese market, China hot runner market shows great potential for development.
    At the same time, this trend of China's mold industry of rapid technological upgrading are also play a huge role. A large number of new domestic private enterprises have also recognized the opportunities in this area, have established hot runner manufacturers, which reduces the cost of the use of hot runner technology, accelerate the popularization and application, are of great significance. But Luo Baihui view, China's local enterprises can provide technology is either currently still primary, choice of small, unstable quality, maintenance cycle is short, often affecting the downstream businesses of their confidence in the products. Therefore, the development of hot runner components of the national standards, actively producing inexpensive high-quality components, good hot runner technology promotion is the key to the development of domestic hot runner mold.

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         Peter Huang