Custom Hydraulic Cylinders for Metallurgical & Heavy Machinery

Tianjin Uranus Hydraulic Machinery Co., Ltd. provides custom hydraulic cylinders for the injection molding machine industry, focusing on the clamping, injection, and ejection functions. As a national small giant enterprise with over 30 years of hydraulic expertise, we design cylinders that offer high cycle life, precise control, and resistance to contamination from plastic materials and regrind dust. Our custom clamping cylinders for toggle injection molding machines are typically double-acting, with a large bore (up to 500 mm) and a short stroke (up to 600 mm). They must generate very high clamping forces (up to 5,000 tons). We use forged steel construction, heavy-duty bearings, and seals designed for high-pressure cycling. For a Japanese injection molding machine builder, we supplied custom clamping cylinders for a 3,000-ton machine. The cylinders have been in service for over 10 years with no failures. For injection cylinders, we provide custom designs that operate at high pressures (up to 2,500 bar) for advanced molding processes like microcellular foaming. The cylinder rod is made from high-strength tool steel, and the seal system includes a high-pressure backup ring. We also integrate pressure transducers for injection pressure profiling. For a German machine manufacturer, we supplied custom injection cylinders for a high-speed injection unit, achieving shot weight consistency of ±0.1 percent. For ejector cylinders, we provide compact cylinders that push finished parts out of the mold. These cylinders must have very fast response times. We use lightweight pistons and high-response valves integrated into the cylinder manifold. For a Chinese injection molding machine builder, we supplied custom ejector cylinders with a bore of 63 mm and a stroke of 150 mm, operating at 160 bar, with a cycle time of under 0.5 seconds. Our design process includes a fatigue analysis for the cylinder under repeated high-pressure cycles. We provide full documentation, including a test report and a recommended seal replacement interval. For a custom cylinder for your injection molding machine and a quote, please contact us.