Injection Molding Machine Precautions
Injection molding machine temperature rise is too high Five hazards: the mechanical heat distortion, reduce the viscosity of the oil, rubber seals deformation, accelerate the oil oxidation deterioration, but also to make air pressure drop.
One of the hazards: the mechanical deformation
Hydraulic components in the thermal expansion coefficient of different moving parts because of their smaller gap and stuck, causing the malfunction, affecting the hydraulic system of transmission accuracy, resulting in deterioration of the quality of parts work.
Hazard two: to reduce the viscosity of oil
Injection molding machine temperature is too high will lead to reduced viscosity of the oil, increased leakage, the pump volumetric efficiency and the efficiency of the entire system will be significantly reduced. Due to the reduced viscosity of the oil, sliding films and other moving parts of the film thinning and being cut, frictional resistance increases, leading to increased wear and tear.
Hazard of the three: the deformation of rubber seals
Injection molding machine temperature will be too high deformation of rubber seals, accelerated aging failure, reduce sealing performance and service life, resulting in leakage.
Harm four: accelerate the oxidation of oil deterioration
Injection molding machine temperature is too high will accelerate the oxidation of oil deterioration, precipitation of asphalt material, reducing the service life of hydraulic oil. Precipitates clogged orifice and slit valve port, resulting in pressure valve stuck and can not move, the metal pipe elongation and bending, or even rupture.
Hazard five: lead to deterioration of the quality of parts work
Injection molding machine temperature is too high will lead to deterioration of the quality of work parts, the oil dissolved air escape, resulting in cavitation, resulting in reduced hydraulic system performance. The ideal operating temperature of the hydraulic system should be between 45 degrees and 50 degrees because the hydraulic system is designed based on a selected viscosity of the pressure oil but the viscosity will vary with the oil temperature and thus the work in the system Components such as cylinders, hydraulic valves, etc., to control accuracy and lower response sensitivity, especially for precision injection molding machines. At the same time, the temperature will also accelerate the aging of the seal so that it hardens, fragmentation; temperature is too low, processing energy consumption, so that the operating speed is reduced. Therefore, pay close attention to the working temperature of the hydraulic oil is very necessary. Oil temperature is too high for a variety of reasons, but mostly due to oil failure or cooling system failure.
