Smart Molding International 1-2023

32 smart_molding international 1/2023 machinery A big step to the new era in plastic industry: 8500-ton ultra-large injection molding machine delivered The largest injection molding machine in China, designed, developed and produced by YIZUMI, was officially delivered to the customer on March 14th. So, this model is officially operated by customers now. T he 8500-ton ultra-large high pre- cision injection molding machine has been hailed as one of the no- ticeable 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 tech- nologies, such as precision control technology, thick-wall injection mold- ing technology for large transparent parts, synchronous plasticization by two injection units, and injection com- pression 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 All photos: YIZUMI