Injection molding machine straight-pilot overflow pneumatic valve fault causes and elimination method 2

for the hydraulic system pressure is low or high, unstable pressure limiting: straight-pilot overflow pneumatic valve pressure limiting instability. Hydraulic actuators movement unable or tubing, pump body, pneumatic valve body burst. The causes of the failure are: improper pressure adjustment; The forerunner of pneumatic valve pneumatic valve core spring bending or soft; Oil had dirty or the oil flow. The corresponding elimination measures is to adjust; Correction, padded or replacement; Replacement and cleaning. Unstable straight-pilot overflow pneumatic pressure limiting valve for gradual failure, straight-pilot overflow for sudden fault, pneumatic valve failure after rule out the failure, should be in accordance with the limit pressure of injection molding machine system into straight-pilot relief the pressure of the pneumatic valve control to adjust.
straight-pilot overflow pneumatic valve widely used in the injection molding machine hydraulic system control oil circuit. With the development of injection molding machine hydraulic system in the direction of medium and high pressure.
to maximize its effectiveness, to use in practice. Maintenance control system, the accurate and timely diagnosis and eliminate straight-pilot overflow pneumatic valve fault is a key ring. Straight-pilot overflow pneumatic valve failure, will cause the injection molding machine can't move. According to the phenomenon, to analyze its reasons are: the forerunner pneumatic valve pneumatic valve core spring break. Yin hole plugging; The forerunner of pneumatic valve pneumatic valve mouth sealed; Main pneumatic valve core is jammed, etc. Corresponding exclusion measures is to replace or add flat washer in broken to emergency use; Cleaning dredge; Grinding or will the oil circuit breakers for emergency use; Grinding, cleaning.