Five hazards of high temperature rise of injection molding machine

Make mechanical thermal deformation, reduce the viscosity of oil, rubber seal deformation, accelerate oil oxidation deterioration, but also reduce the partial force pressure of air.

Harm one: the mechanical thermal deformation

In the hydraulic components, the moving parts with different thermal expansion coefficient are stuck because of their small cooperation， which causes the action failure, affects the transmission accuracy of the hydraulic system, and leads to the poor working quality of the parts.

Harm two: reduce the viscosity of the oil

High injection molding machine temperature rise will lead to lower oil viscosity, increased leakage, pump volume efficiency and overall system efficiency can be significantly reduced.As the viscosity of oil decreases, the oil film of moving parts such as slide valves becomes thinner and is cut, and the friction resistance increases, leading to increased wear.

Harm three: deformation of rubber seals

High temperature rise of injection molding machine will deform rubber seals, accelerate aging failure, reduce sealing performance and service life, resulting in leakage.

Harm four: accelerate oil oxidation metamorphism

High temperature rise of injection molding machine will accelerate the oxidation and deterioration of oil, precipitate asphalt material, and reduce the service life of hydraulic oil. The precipitates block the orifice of the damper orifice and aperture valve, resulting in the pressure valve stuck and unable to act, the metal pipeline elongation and bending, and even rupture.

Hazard five: causing parts to work in poor quality

The high temperature rise of injection molding machine will lead to the poor working quality of the parts, the dissolved air in the oil will escape, resulting in cavitation, resulting in the performance of the hydraulic system.

The ideal operating temperature of the hydraulic system should be between 45 degrees and 50 degrees because the hydraulic system is designed according to a selected pressure oil viscosity. But the viscosity will change with the high and low oil temperature, and then affect the working components in the system, such as cylinder, hydraulic valve, so that the control accuracy and response sensitivity is reduced, especially for precision injection machine. At the same time, the temperature is too high to accelerate the aging of seals, hardening and fragmentation; If the temperature is too low, the processing energy consumption is large, so that the operation speed is reduced. Therefore, it is necessary to pay close attention to the working temperature of hydraulic oil. There are various reasons for excessive oil temperature, but most of them are attributed to oil circuit failure or cooling system failure.