A brief discussion on the maintenance of semi-automatic bobbin changers

The smooth operation of semi-automatic yarn winding machines and the rate of yarn breakage directly affect the labor intensity and efficiency of the yarn winder workers. I would like to share my maintenance experience to improve together.

1. The yarn winding track and pulley pipeline must be straight, and the positioning between platforms should be consistent, ensuring that the yarn winding machine can pass through unobstructed.

2. Positioning of the yarn pulling plate

    Align the line connecting the highest point of the pre-loosening plate's inner arc with the center of the circle perpendicularly to any spindle. The height of the highest point of the inner arc of the yarn pulling plate should be on the same plane as the top point of the third spindle behind it, maintaining a distance of about 10mm from the spindle. If yarn jumping occurs during operation, it indicates that the angle of the yarn pulling plate is too flat, and its inclination angle should be slightly increased. Prevent the positioning displacement caused by the collision bending of the push rod connected to the bottom plate.

3. Material modification of the pre-loosening plate

    The original pre-loosening plate was made of bakelite bonded with multiple layers of materials, which could peel off when colliding with spindles, forming self-sharpening, easily cutting the yarn at the bottom of the tube, increasing the workload of tube shaking and head formation, and increasing consumption. We chose 10mm thick nylon plates to manufacture the pre-loosening plates, which have better adhesion and are less likely to peel off after collisions, producing burrs; their smooth and warm characteristics prevent black deposits from forming after long-term friction with synthetic fibers, avoiding contamination of the finished yarn.

4. It is best to use stainless steel with a diameter of 6mm for the yarn intercepting rod, and the working arc should be as straight as possible to avoid excessive downward force causing more yarn breaks. The length should be shorter to reduce the amplitude of the yarn intercepting rod. Its operating channel should be smooth and unobstructed. This effectively reduces yarn breaks.

5. The side wheels should be made of steel for easy welding repair after wear, and the internal bearings should be replaced with 202 bearings, increasing the diameter of the shaft to enhance breaking strength. Reducing shaft consumption.

6. The yarn winding box should be made of 1mm thick white iron plate, with the fixed bottom part reinforced with 1.5mm thick iron