Custom Hydraulic Cylinders for Metallurgical & Heavy Machinery

Tianjin Uranus Hydraulic Machinery Co., Ltd. specializes in custom hydraulic cylinders for the die casting and metal forming industry, where extreme temperatures, high pressures, and rapid cycling are the norm. As a national small giant enterprise with over 30 years of hydraulic experience, we design cylinders that withstand the thermal shock of molten metal and the high forces required for clamping and injection. Our custom cylinders for die casting machines are typically used for die closing, core pulling, and injection. For the injection cylinder, we design it to operate at high speeds (up to 10 m/s) and high pressures (up to 500 bar) to fill the die cavity before the metal solidifies. The cylinder rod is made from hot-work tool steel and is surface-treated to resist galling. The seal system uses high-temperature materials such as Viton or Kalrez, and we incorporate cooling channels in the cylinder head to maintain seal integrity. For a European die casting machine builder, we supplied a custom injection cylinder with a bore of 180 mm and a stroke of 800 mm. The cylinder is equipped with a high-response servo valve and a position sensor, achieving shot control precision of ±1 mm. This cylinder has been in production for over five years and is known for its reliability. For core pulling applications, we provide compact cylinders that can withstand the heat radiated from the die. We use water-cooled rod extensions and heat shields to protect the cylinder body. For a Chinese automotive parts manufacturer, we supplied 20 custom core pull cylinders for a large die casting cell producing transmission housings. The cylinders operate in a cell with a 400°C die surface temperature, and they have achieved a service life of over 500,000 cycles. In metal forming, such as extrusion presses, our custom cylinders are used for the main ram and container positioning. These cylinders are very large, with bores up to 1,000 mm and strokes up to 3,000 mm, and they must withstand pressures up to 1,000 bar for some applications. We design them with pre-stressed tie rods, multi-layer seal assemblies, and heavy-duty bronze bearings. For a US-based extrusion press manufacturer, we provided a custom main cylinder with a built-in load cell and a position sensor for closed-loop force control, enabling consistent extrusion speed and product quality. Our manufacturing process for die casting and forming cylinders includes ultrasonic testing of raw materials, in-process dimensional inspections, and final hydrostatic testing at 1.5 times working pressure. We also perform cycling tests at simulated operating conditions. Each cylinder is accompanied by a detailed test report and a two-year warranty. For a custom cylinder solution for your die casting or metal forming application and a quote, please contact us.