A Big Step to the New Era in Plastic Industry | 8500-ton Ultra-large Injection Molding Machine Delivers

The largest injection molding machine in China, which was designed, developed and produced by YIZUMI, is officially delivered to the customer in 14th, March. It marks that the machine is officially put into operation by customers.

The 8500-ton ultra-large high precision injection molding machine has been hailed as one of the noticeable breakthroughs of YIZUMI. It is not only the largest-tonnage machine installed in China, but also could meet the customer requirements in molding process relying on its advanced technologies, such as precision control technology, thick-wall injection molding technology for large transparent parts, synchronous plasticization by two injection units, and injection compression molding technology.

The machine was manufactured by the team of two-platen injection molding machine of YIZUMI. The rated clamping force of the machine is 8500T, and the maximum clamping force can reach 9000T, which has achieved a breakthrough in the key technology of China ultra-large two-platen injection molding machine, and also set a new record of injection molding machine industry in China.

8500-ton ultra-large injection molding machine, the first injection molding machine with the largest clamping force in China, embodies the wisdom and painstaking efforts of the YIZUMI R&D team, and it is the result of the continuous pursuit of excellence by the experts participating in the research and test in overcoming difficulties.

The project has entered the stage of preliminary technical research and technical demonstration since the middle of 2019. During this period, a large number of technical personnel of YIZUMI have carried out preliminary demonstration, scaling experiment, process test and other work. After that YIZUMI has determined the direction of research and development. Through a large number of project design, data calculation and simulation analysis by the research and development personnel, it has overcome a series of engineering problems such as the manufacturing, assembly and functional testing of ultra-large parts of the machine.

Through continuous testing, the machine passed the client's scheme review, technical review and process review in the first quarter of 2021, and completed the whole machine assembly and test run in December of the same year. In order to ensure that the production process of the customer's products meets the requirements of mass production, three mold tests were conducted in 2022 to fully verify the performance of the machine. It completed the process validation of the customer's products and the production of the customer's first batch of products at the end of November of the same year. It totally took three and a half years from the early technical demonstration to the successful production, during which more than 30 technicians participated in the development of the machine.

The 8500-ton ultra-large high precision injection molding machine is a key product that YIZUMI has built with great effort in recent years. Its accuracy of mold opening and closing is able to up to ±0.3mm and two injection units with a maximum shot weight of 140 kg. Meanwhile, it can be used in one-step molding of large-sized transparent plastic parts (or with metal inserts) with high requirement in part shape, light transmittance and accuracy, solving the molding difficulties of large-sized transparent plastic part in China.

Besides, the machine incorporates cutting-edge technologies in the industry, including injection compression molding (ICM) technology, SmartClamp technology, internal circulation two-platen clamping unit and closed-loop pump technology special for optical products. The control system integrates smart control technology, information technology and Internet technology independently developed by YIZUMI. And the machine is of high precision, high speed and intelligence, energy saving attained 30% compared with traditional three-platen machine.

In February 2023, China Plastic Machinery Industry Association (CPMIA) recognized that the technology of 8500-ton Injection Molding Machine reached the international advanced level and agreed to pass the appraisal.

The appraisal committee were inspecting the equipment production site

With the rapid development of domestic aerospace and automobile industry, the demand for ultra-large injection molding products is gradually increasing. YIZUMI will continually develop new products, new technology and new process, to improve the integrated solution for ultra-large injection parts. One-step molding of large plastic components achieved by integrating different in-mold technologies, replacing the assembling production of small and medium size plastic parts, will gradually become a new technical trend.

At present, the machine which was completed prototype development and commissioning has been delivered to customer. For this achievement, Deputy Managing Director of YIZUMI Group & General Manager of Injection Molding Machine Division, Zhang Tao introduced: “The R&D of the 8500-ton ultra-large high precision injection molding machine has taken a leading role in the development of large-scale injection molding machine for the plastic industry. In terms of tonnage and injection weight, this machine is the largest injection molding machine produced in China at present.”

“This machine is not only large, but also we have adopted new technologies such as injection compression molding process and synchronous plasticization by two injection units.” Zhang Tao emphasized, “The development of the machine has increased more possibilities for our application in large plastic parts. It also means that YIZUMI has achieved the leading position in the industry of ultra-large injection molding machines in global.”

As the first product of injection molding machine with the largest clamping force in China, 8500-ton ultra-large injection molding machine can meet the demand for ultra-large products in aerospace, automotive industry, petrochemical pipeline, transportation facilities and other fields. Meanwhile, it has solved a series of difficulties in the processing, transportation and assembly of ultra-large equipment, and provided customers with more cost-effective ultra-large transparent plastic molding solutions.

*The Data above were acquired by testing in the factory, only for your reference. As to the specific data, please refer to the actual equipment.