With the continuous progress and development of the textile industry, reducing consumption and reducing costs have become the key factors for enterprises to win. The spinning process as the final process of manufacturing directly determines the final quality of the product and the size of the consumption of semi-finished products, so the consumption of spinning yarn is reduced 1. Increasing the production rate of semi-finished products is an important measure to reduce enterprise consumption and improve enterprise efficiency. Reducing spun yarn breakage is an important measure to reduce spun yarn consumption. Reducing spun yarn breakage is mainly continuously optimized and improved from the following two aspects.
Reasonable selection of equipment parts
The proper selection of the textile parts such as steel rings, travellers, rubber rollers, rubber rings, grid rings and the reasonable determination of the cycle directly determine the operating status of the spinning process and the number of ends in the spinning process.
01
traveller
It can be seen from the follow-up test that within a life cycle, with the continuous increase of the travel cycle of the traveller, the hairiness of the yarn and the instantaneous break of the spun yarn have varying degrees of change. Therefore, in the production, the reasonable selection of the traveller The reasonable determination of the use period is a decisive factor in determining the yarn breakage. The selection of the traveller model and number should be selected according to the type of yarn being spun and the actual production (aggregate spinning, ring spinning).
There are great differences in the selection of travellers for cluster spinning and ring spinning. In comparison, the spindle speed is higher, the hairiness is less, the traveller lacks lubrication, and the heat dissipation is poor. It is necessary to select a ring shape with a large contact area between the traveller and the ring, so that the heat dissipation is good and the travel time of the traveller is improved. The selection of the number of travellers should be comprehensively considered based on the cotton blending index. In general, if the fiber quality is poor and the fiber length is short, the traveler should be appropriately reduced by 1 to 2 numbers, thereby reducing yarn breakage and fiber quality. Well, when the fiber length is long, appropriately increase the number of travellers 1-2, so as to improve the yarn index.
On the basis of comprehensive yarn formation index, fiber length and other factors, when selecting the number of travellers, the running state of travellers should also be integrated, so that the yarn does not touch or less touches the yarn separation plate, thereby improving the yarn index.
02 grid circle
Reasonable selection of grid circles, and strict control of the use of grid circles are of great significance to reduce spun yarn ends. As a special piece of concentrated negative pressure suction type concentrated spinning, the grid circle directly affects the number of spun yarn ends. In the use of grid circles, we must first determine the type of grid circles according to the actual production. In the production of pure cotton, we should prefer to use anti-static grid circles to prevent the accumulation or entanglement of the grid circles in production. The flowers cause an increase in spun yarn ends. At the same time, the use period of the grid circle should be reasonably determined, generally 6 months. At the same time, during the use process, the grid circle should be cleaned every sweeping cycle, and the cleaning should be handled gently to prevent damage to the grid circle due to knocking and increase of the broken yarn ends.
03 glue roll
The proper selection of the front rubber roller and the service cycle directly affect the yarn breakage rate. In the actual production, it was found that the yarn sliver and CVb value did not change significantly when the spinning distance of the concentrated spinning yarn was 4 mm, 5 mm, and 6 mm. Without affecting the yarn sliver, the spun yarn movement should be relatively large, preferably about 5 mm, and the use period of about 2 months. The spinning distance of the spun yarn is small, the service life of the rubber roller is shortened, the end of the spun yarn is increased, the consumption is increased, and the labor of the worker will also increase.
Optimized spinning process and equipment
The rational optimization of the spinning process and equipment is also an important factor affecting the yarn breakage. The main factors that affect the spinning process breakage are pressure bar, doffing process and equipment status.
01 pressure bar
The index of the pressure bar is better than the index of the spacer block. The smaller the pressure bar, the better the index. However, the smaller the pressure bar, the stronger the control ability of the fiber, the greater the impact on the internal structure of the yarn, the greater the impact on the subsequent process; at the same time, the pressure bar is too small, the more likely to cause the spinning process hard The phenomenon of roving and roving will increase the breakage of the spun yarn. Therefore, in the selection of the pressure bar, the pressure bar must be considered in consideration of the yarn quality and the yarn breakage. When the yarn index is qualified, the pressure bar must be Too much control.
02 Doffing process parameters
Doffing process parameters are also an important factor that affects the spun yarn break. During the doffing and spinning process of the spun yarn, the process parameters must be rationally designed. According to different yarn types, yarn twists, and counts, select reasonable spun yarn doffing process parameters. Because the smaller the twist of the yarn, the greater the impact on the large and small yarns; the lower the yarn count, the greater the impact on the large and small yarns. In addition, the length of the yarn tail should be designed reasonably. The length of the yarn tail should be controlled at about 2 turns. If it is too long, it will increase the labor intensity of the winding process. If it is too short, it will easily increase the number of spun yarn ends.
03 spinning equipment status
The state of the spinning equipment directly determines the number of spinning ends. For example, the equipment should be uniform with the ring plate, leaf plate, and yarn separation plate to prevent the increase in the number of yarn breaks caused by the deformation of the ring plate, leaf plate, and yarn separation plate. At the same time, the daily inspection and maintenance work of the equipment should be strengthened to ensure that the drafting parts of the drafting area rotate normally, the size of the floating area is the same, and the pressure of the cradle is the same, so as to ensure the normal and effective operation of production; strengthen the tour to reduce repeated break And the spun yarn is broken due to human reasons, so as to ensure the normal production, which is also an effective way to maintain the good operation of the equipment.
