Hydraulic oil in die casting machines must have properties like high thermal stability, low compressibility, and good lubrication to ensure efficient and precise operation.
Die casting is a highly efficient and precise manufacturing process that involves injecting molten metal into a mold cavity under high pressure to produce complex and high-quality metal parts.
In this process, hydraulic systems play a crucial role in powering and controlling various components of the die casting machine.
Therefore, the properties of hydraulic oil used in these machines are of great significance.
Viscosity
Viscosity is a measure of a fluid’s resistance to flow. In die casting machines, hydraulic oil must have the appropriate viscosity to ensure efficient lubrication and power transmission.
High – viscosity oils provide better lubrication but may increase energy consumption, while low – viscosity oils offer easier flow but may not provide sufficient lubrication.
HAICHEN recommends using hydraulic oils with a viscosity grade suitable for the specific operating conditions of the machine.
Thermal Stability
Thermal stability is crucial for hydraulic oil in die casting machines, which operate at high temperatures. The oil must be able to withstand these temperatures without breaking down or forming sludge.
Thermal degradation can lead to increased viscosity, reduced lubrication, and potential damage to the machine.
Oxidation Resistance
Oxidation resistance is another important property of hydraulic oil. It can cause the oil to thicken and form deposits, leading to reduced efficiency and potential machine failure.
Hydraulic oils with good oxidation resistance help maintain the oil’s properties over time, reducing the need for frequent oil changes and maintenance.
Water Resistance
Water contamination can be a significant issue in hydraulic systems, leading to corrosion and reduced oil performance.
Hydraulic oils with good water resistance help prevent these issues by repelling water and maintaining their properties even in the presence of moisture.
HAICHEN’s machines are designed to work with hydraulic oils that have excellent water resistance, ensuring reliable performance in various operating conditions.
Compatibility with Machine Components
The hydraulic oil must be compatible with all components of the die casting machine, including seals, hoses, and pumps. Incompatibility can lead to leaks, wear, and damage to these components.
HAICHEN ensures that its machines are compatible with a wide range of hydraulic oils, providing detailed recommendations to ensure optimal performance and longevity.
Key Properties of Hydraulic Oil in Die Casting Machines
Hydraulic oil is the core fluid in a die casting machine’s hydraulic system. Its quality directly affects system response, control accuracy, and machine life. Under tough conditions of high heat, high pressure, and constant cycling, the oil must have these key properties for stable operation.
- Viscosity
- Thermal Stability
- Oxidation Resistance
- Water Resistance and Air Release
- Material Compatibility and Wear Protection
Viscosity
Viscosity measures the oil’s resistance to flow. It links directly to system efficiency and lubrication. Oil that is too thick flows slowly, uses more power, and can overheat the pump. Oil that is too thin can cause internal leaks, reduce control precision, and increase wear. HAICHEN suggests using oil with the right ISO VG grade (like VG 46 or VG 68) and a high Viscosity Index. This keeps the viscosity stable across both cold starts and hot operation.
Thermal Stability
Hydraulic systems in die casting machines run hot (over 60°C in some areas). Good thermal stability means the oil resists chemical breakdown at high temperatures. It avoids forming sludge, varnish, and acids. Heat breakdown makes oil viscosity change in bad ways, clogs valves, and corrodes metal. Using oil made from high-quality base stock with strong anti-heat additives is key for a clean, reliable system.
Oxidation Resistance
Hydraulic oil reacts with air during use. This is called oxidation. Oxidation makes oil thicker and creates harmful deposits. These can clog filters and wear out servo valves. Strong oxidation resistance, from special additives, slows this process. It greatly extends the oil’s useful life and the time between oil changes. Regular oil analysis helps check its condition.
Water Resistance and Air Release
Water in the system is a common problem. It can make oil milky, reduce lubrication, and cause rust. Good hydraulic oil should separate from water quickly and let the water drain out. Also, the oil must release trapped air and resist foaming well. Air bubbles can damage pumps, cause uneven pressure, and make components slow to respond. HAICHEN machines are built to limit water and air entering the system and work best with oils that separate water and resist foam well.
Material Compatibility and Wear Protection
The oil must work safely with all seals, hoses, and metals (like copper, aluminum) in the system. It must not cause seals to swell or crack, which leads to leaks. Most importantly, it must give excellent wear and extreme pressure protection. It forms a strong film on moving parts inside pumps, cylinders, and precise valves. This reduces metal-to-metal contact and wear. This protection is vital for maintaining accurate injection and clamping.
HAICHEN: Your Partner in Die Casting Excellence
At HAICHEN, we specialize in manufacturing high – quality die casting machines designed for precision and efficiency.
Our machines are equipped with advanced hydraulic systems that require the right hydraulic oil to maintain optimal performance.
Whether you are starting a new project or upgrading your existing equipment, HAICHEN has the solutions to meet your needs.
Understanding the properties of hydraulic oil is essential for maintaining efficient and reliable die casting operations. By selecting hydraulic oils with the right viscosity, thermal stability, oxidation resistance, water resistance, and compatibility with machine components, manufacturers can ensure consistent performance and reduce maintenance costs.
