Why does die casting machine for making aluminum leak oil?

The oil leakage problem of automatic die casting machine is very common, and it can even be called a common failure in the industry. In the process of operating the nonferrous metal die casting machine, various problems will often occur over time. Among them, the oil leakage of cold chamber die casting machine is related to whether the machine can start normally, so the ranking of severity is quite high.

Here is the content list:

• What is the role of die casting machine hydraulic oil?

• What are the requirements of die casting machine for the oil?

• How to prevent oil leakage of die casting machine hydraulic cylinder?

What is the role of die casting machine hydraulic oil?

In the past, mineral type hydraulic oils were mainly used for die casting machines, which are widely used because of their wear resistance, high stability, and good sealing performance.

However, due to the danger of burning or explosion of such die casting machine hydraulic oil, flame-retardant hydraulic fluids have been increasingly used in recent years.

Water-glycol type hydraulic oil is one of the most recommended by people at present, and its unique performance in safety, easy handling and environmental protection is also valued by people.

The temperature of the hydraulic oil has a great influence on the life of the die casting machine. It will seriously affect the viscosity of hydraulic oil, and improper use may also cause oil leakage of die casting machine and accelerated aging of oil seal. Therefore, it is recommended that the temperature of hydraulic oil be between 15 – 55 °C.

What are the requirements of die casting machine for the oil?

The die casting machine can inject the molten metal into the mold for cooling and forming under pressure. After the mold is opened, solid metal castings can be obtained. When it comes to die casting machine, the relevant oil used is hydraulic oil.

The hydraulic oil of the die casting machine can not only be used as a hydraulic medium for power transmission, but also can play a role in energy transmission, anti-wear, system lubrication, anti-corrosion, anti-rust, and cooling in the hydraulic system.

In order to ensure the normal operation of the die-casting machine, the characteristics of the hydraulic oils are listed below as a reference when selecting.

• Able to form suitable seals in moving parts;

• There should be no physical or chemical changes during use;

• It can withstand the load properly and reduce the wear of moving parts;

• According to the purpose, it is resistant to burning;

• Not easy to foam.

How to prevent oil leakage of die casting machine hydraulic cylinder?

The leakage of die casting machine hydraulic cylinder includes external leakage and internal leakage. Regardless of external leakage or internal leakage, the main reasons for the leakage are: poor sealing; internal leakage due to pressure expansion of the cylinder; poor welding of the hydraulic cylinder with welded structure causes leakage.

External leakage refers to the external leakage at the cylinder and cylinder head, cylinder bottom, oil port, exhaust valve, buffer regulating valve, cylinder head and piston rod. It can be directly observed from outside the die casting machine.

Internal leakage refers to the leakage of pressure oil from the high-pressure cavity inside the die casting machine hydraulic cylinder to the low-pressure cavity. It occurs at the connection between the piston and the inner wall of the cylinder, the inner hole of the piston and the piston rod.

The internal leakage cannot be directly observed, pressure oil needs to be unilaterally introduced. After stopping the piston at a certain point or terminal, observe whether the other oil port is leaking to determine whether there is internal leakage.

In addition, the alloy chips and oil stains on the machine must be cleaned regularly, and the hydraulic cylinder, machine hinge, template, and injection chamber must be paid extra attention.

Oil tanks, hydraulic pumps, hydraulic motors, hydraulic valves, pipe joints and pressure gauges, and oil circuit board connections should also be checked for oil leakage, and deal with them in time.

The cold chamber die casting machine has strict requirements for the safe operation of the operator. Correctly perform automatic die casting machine maintenance, which not only protects the safety of personnel and equipment, but also improves economic efficiency. Longhua Die Casting Machine Co., Ltd is a careful and responsible nonferrous metal die casting machine manufacturer. We promise to provide you with cost-effective after-sales service and solve all kinds of machine failure problems for you.