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Large die casting machine tech

February 03, 2022
The entry barrier for the large-scale die-casting machine industry is high, with high requirements for theory, experience, and manufacturing processes. At the same time, the development cycle of large-scale die-casting machines is very long, with high initial investment and high cost. Integrated die-casting requires a clamping force of at least 6,000 tons (traditional high-pressure die-casting clamping force is usually less than 5,000 tons). In October 2021, Swiss company Bühler introduced the Carat840/920 super large two-platen die-casting machine with a clamping force of up to 92,000 kN. Two sets of Carat840 die-casting islands were delivered to Volvo's Torslanda plant, achieving integrated die-casting. The OL6200CS die-casting machine developed by Italian company IDRA (a subsidiary of Lijin) has dimensions of 19.5m×5.9m×5.32m, equivalent to the size of a badminton court. The effective size of the platform is 2.35m in length and width, and the workbench space can accommodate any part with dimensions within 2m in length, width, and height, providing a maximum clamping force of 6,218 tons.

According to the patent application by Bühler in 2011, it can form a cavity between the casting molds, inject aluminum liquid into the cavity, and generate negative pressure in the mold cavity through vacuum pumping, effectively eliminating the air holes generated by casting turbulence, which helps improve the internal density of die-cast parts. Lijin, a domestic die-casting machine manufacturer, has a market share of over 40% in the global die-casting machine market and has developed a 6,000-ton die-casting machine, and has currently developed a 12,000-ton die-casting machine. In April 2021, Haitian Metal launched the HDC8800-ton die-casting machine at the Chongqing Meilixin Global Premiere, which can achieve integrated production of large structural components including new energy vehicles' bodies and chassis. Yizhimi Company's 7,000-ton die-casting machine has been assembled and delivered.

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