How to analyze and improve the 1 process in production management
1. 1 On the premise of no hard head, proper use of larger roving twist coefficient and smaller post-spinning drafting can enhance the internal friction field between fibers, stabilize the friction field of drafting, and facilitate the speed change when the fibers approach the nip; Using smaller jaw spacing can increase the strength of friction boundary in apron drafting area, which is beneficial to the control of fiber movement and the stability of fiber speed change point.
1.2 appropriately shortening the length of the floating zone can reduce the number of uncontrolled short fibers in the floating zone. At the same time, the friction boundary of the apron jaw can be extended forward accordingly, and the friction length of some fibers in the apron can be increased, thus strengthening the control of floating fibers.
2 cots and aprons.
2. 1 Strengthen the rational selection and daily management of cots according to the variety requirements. For cotton or cotton-based varieties, soft and elastic cots should be used.
2.2 Cover the cots strictly, strengthen the compression molding of cots, eliminate the stress difference of cots and improve the internal quality of cots; Do a good job of fine grinding, reduce the eccentricity, concavity and deformation difference between the top and bottom of the cots, and make the surface of the cots smooth; For medium hardness cots, under the premise of ensuring a certain anti-winding, the proportion of coating is appropriately larger, which is conducive to reducing the generation of rough details.
2.3 apron should be soft, with small elongation, uniform thickness, accurate specifications and dimensions, good elasticity of the outer surface layer and smooth and wear-resistant inner surface layer. Adoption? Upper old and lower new or upper new and lower old? This matching method makes the friction rotation of the upper and lower aprons stable without speed difference.
2.4 In daily production management, lathe operators and cots repairmen should carefully check whether the aprons of all cots are damaged or cracked, and replace them in time if any abnormality is found. Change the apron regularly.
3 in terms of equipment
3. Before1,the dynamic curvature of the drum should be controlled below 0.03mm, the surface of the drum should be smooth without damage, and there should be no dust between teeth. In each cleaning cycle, three rows of rollers should be cleaned with a copper wire brush.
3.2 do a good job of correcting and cleaning the upper and lower parts to ensure smooth and burr-free. The upper jaw should be elastic, firm and without deviation, so as to form an effective lower jaw.
3.3 Regularly correct the cradle pressure to ensure the stability of the pressure, and the positions of the three rows of cots are parallel.
3.4 Strengthen the management of the use of the traversing device, the yarn guide stroke should be between 8- 10mm, and the side distance should be no less than 2.5mm, so that the fiber can constantly change the drafting point and grip point during drafting, which is beneficial to prolonging the service life of the cots and aprons.
3.5 Ensure good gear engagement, strengthen the maintenance of keyway and key of shaft, and check the tooth surface wear.
3.6 In the process of handling and using roving, prevent strong friction between rovings, and prevent the surface of roving from being directly handled by hand.