Oil needles primarily form when the oil supply fails to meet the operational demands of the machine. Issues arise when there is an anomaly in the oil supply or an imbalance in the oil-to-air ratio, preventing the machine from maintaining optimal lubrication. Specifically, when the oil quantity is excessive or the air supply is insufficient, the mixture entering the needle tracks is no longer just an oil mist but a combination of oil mist and droplets. This not only leads to potential oil wastage as excess droplets flow out, but it can also mix with lint in the needle tracks, posing a risk of forming persistent oil needle hazards. Conversely, when the oil is scant or the air supply too great, the resulting oil mist density is too low to form an adequate lubrication film on the knitting needles, needle barrels, and needle tracks, increasing friction and consequently, the machine temperature. Elevated temperatures accelerate the oxidation of metal particles, which then ascend with the knitting needles into the weaving area, potentially forming yellow or black oil needles.
Prevention and Treatment of Oil Needles
Preventing oil needles is crucial, especially in ensuring that the machine has adequate and appropriate oil supply during startup and operation. This is particularly important when the machine faces high resistance, operates multiple paths, or uses harder materials. Ensuring cleanliness in parts like the needle barrel and triangle areas before operation is essential. Machines should undergo thorough cleaning and cylinder replacement, followed by at least 10 minutes of running empty to form a uniform oil film on the surfaces of the triangle needle tracks and knitting needles , thereby reducing resistance and the production of metal powder.
Furthermore, before each machine start-up, machine adjusters and repair technicians must carefully check the oil supply to ensure sufficient lubrication at normal operating speeds. Block car workers should also inspect the oil supply and machine temperature before taking over; any abnormalities should be immediately reported to the shift leader or maintenance personnel for resolution.
In the event of oil needle issues, the machine should be stopped immediately for addressing the problem. Measures include replacing the oil needle or cleaning the machine. First, inspect the lubrication condition inside the triangle seat to determine whether to replace the knitting needle or proceed with cleaning. If the triangle needle track has yellowed or contains many oil droplets, a thorough cleaning is recommended. For fewer oil needles, replacing the knitting needles or using waste yarn for cleaning may suffice, followed by adjusting the oil supply and continuing to monitor machine operation.
Through these detailed operational and preventive measures, effective control and prevention of oil needle formation can be achieved, ensuring efficient and stable machine operation.
Post time: Jul-25-2024