![]() ![]() In addition to this, the flow of coolant is divided directly after penetrating the preform and part of the air is directed to the inner space of the thread. The air initially brushes past on the preform wall toward the front and then arrives back through the inside of the cooling pins, which iincreases the cooling effect on the perform. In the inner space of the preforms, this solution differs from those of other vendors due to its reversed coolant flow. The plate, from which the cooling pins protrude, is water-cooled air that flows through into the preforms therefore arrives there significantly cooler than from uncooled plates. The innovation of the MHTcoolMAX lies in the detail of the cooling plate. This is where a self-developed, three-stage-post-mold cooling solution appears, for which an international patent has been applied for. When the preforms are produced, they need to be post-cooled in order to be dimensionally stable for the further handling as bulk material. This means: The mold is equipped with nozzle thermal sensors and at each individual cavity, the temperature is constantly queried and regulated during operation. (The upgrade set for HyPET 400 works accordingly.) With the second option the customer also receives the possibility of running the machine in the so-called single-nozzle regular operation. Nozzles of the same thermal type are either combined, so that a total of 72 regular positions again result for the machine, or an external device takes over the control of all 96 nozzles. With the nozzle control, there are two options. So that the injection molding machine can operate the mold, the upgrade adapts to it, as the control unit of the Husky HyPET 300 is designed for a maximum of 72 cavities. 85 mm long and 15 g heavy preform with a PCO 1881 thread is created in a cycle time of 9.0 s. The space saving therefore does not go hand-in-hand with a more filigree mode of construction, which may be more susceptible to faults.The pilot project is running very successfully with a leading preform and bottle manufacturer in South America. the molds, in which the preforms are created, are identical with those of the 72-cavity mold that has been well-proven for years. ![]() By moving the cavities slightly closer together and adding a row of cavities on the left and right, the MHT team achieved a higher cavitation without making the molds much wider. The result: An improved degree of effectiveness, higher cooling and energy efficiency and finally, the ecologically and economically purposeful possibility of continuing to operate an existing machine with higher output. ![]() With this requirement, the development team set to work its task. Who wouldn’t say “yes”? With the upgrade sets from 72 to 96 and from 96 to 128 cavities, from MHT Mold & Hotrunner Technology AG (Germany), preform manufacturers who use a Husky HyPET 300 or 400 injection molding machine, can produce 33 percent more preforms – without needing to make changes to their machine!In the entire packaging industry, the signs point to more sustainability and saving resources. The Index is quickly becoming the system of choice for high-volume, thick-walled parts, Urquhart said.With one tank fill, drive 33 percent more kilometres. Husky has also sold several of its new high-output Index preform systems, currently available in the Index 600 platform with 72, 128 and 144 cavities. Those molds previously required a 600-ton system. For example, a 96-cavity mold can now run in a 400-ton system, while a 144-cavity mold can run in a 500-ton. Each HyPET model is designed to accommodate a larger number of cavities than previously possible in the G-PET, so larger molds now fit in smaller machines. Compared to G-PET, which was available in only 300- and 600-ton models, HyPET features six clamp options from 90 to 500 tons. Husky is also seeing a steady conversion from its previous-generation G-PET line to the new HyPET. Customers who have invested in the new systems are having great success, and we’re seeing a lot of repeat orders.” “That approach has been validated by the sales success of the smaller systems. “When we rolled out HyPET, we included a broader range of machine sizes to appeal to new market segments,” Urquhart said. Husky has also been able to make inroads in certain markets and regions thanks to the HyPET 120 and 225 – smaller preform systems the company is carrying for the first time. Urquhart said that Husky has sold a majority of its HyPET 300 systems to European customers. “Europe, especially, has led the charge in the conversion to HyPET.” “The industry is switching over,” Mike Urquhart, Husky’s Vice President, PET and Closures, said. Since their official market rollout earlier this year, Husky has sold more than 75 systems. DUSSELDORF - Husky reports strong order numbers for its new line of HyPET and Index preform production systems. ![]()
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