Production efficiency analysis
1. Fineness of spinning yarn There are many types of spinning yarn, and there are many classification methods. Based on the fiber raw materials and spinning yarn structure, fabric spinning yarn can be divided into short fiber yarn, filament yarn and special yarn. Three categories of yarn. The fineness of spinning yarn can be expressed by diameter or cross-sectional area. The widely adopted index indicating the fineness of spinning yarn is an indirect index proportional to the cross-sectional area. 1. Linear density Tt is the weight in grams of a 1000m-long spinning yarn at a common moisture regain. It is called the linear density of the spinning yarn. The unit is tex. It is a common name for cotton yarn. Tex is a fixed-length system. The thicker the yarn, the larger the special number. 2. Metric count N m When the moisture regain is determined, the number of meters in length of a spinning yarn (or fiber) weighing per square meter is called the metric count. Metric count is a fixed-weight system. The finer the yarn, the higher the count. 3. Imperial count Ne When the public moisture regain is 9.8%, a pound of cotton yarn has a multiple of 840 yards. The imperial count is a fixed weight system. The thinner the yarn, the higher the count. 4. Denier ND Denier refers to the weight of a unit length of spun yarn or fiber. The weight in grams of a 9000m long spun yarn or fiber at a common moisture regain is called denier (ND). Usually used to indicate the fineness of chemical fibers and silk. The fineness is a fixed-length system. The thicker the yarn or fiber, the greater the fineness. 5. The relationship between spinning yarn fineness indicators wszj10390 3. Analysis of factors affecting production efficiency The production efficiency of a loom reflects the output of a single loom per unit time. The production efficiency of the loom is directly proportional to the starting speed, effective width and starting efficiency of the loom. The speed of the loom × the effective width is the main performance indicator of the water-jet loom – the weft insertion rate. Different grades of looms have different weft insertion rates. For enterprises using water jet looms, production efficiency is mainly related to the following factors. (1) Adjustment of various process parameters and related mechanisms: Poor weft insertion often occurs during the production process, the weft is broken at the left scissor, the waste edge on the right is not cut neatly, the weft rebounds, side bracing defects, overlapping weft defects, Breaking defects, skid stops, etc. may be related to the adjustment of process parameters and mechanism adjustment. Precise adjustment of water jet looms is the basis for improving production efficiency. (2) Maintenance and cleaning work of water-jet looms: If the maintenance and cleaning work is done well, it will not only improve production efficiency, but also have a greater impact on the service life of the equipment. The mechanism of the water-jet loom is complicated and compact, and the beating and shedding are high-speed reciprocating leisure mechanisms. During long-term operation, some parts will always be worn or damaged by fatigue. Common damaged parts of the water-jet loom include shear blade wear and brake wear. , belt wear, transmission parts damage, reed wear, etc. Good maintenance work can greatly reduce the wear or damage of parts, thereby reducing the number of shutdowns due to component failure. In addition, poor cleaning of the loom can cause the spinning yarn to wrap around the rotating shaft, causing the gearbox oil seal to be damaged and cause water leakage. If the slurry is not cleaned in time, it will be deposited in the drainage area and cause the drain to be clogged. The production efficiency of water-jet looms has a lot to do with the quality of maintenance and cleaning work. Enterprises should formulate maintenance, refueling, cleaning, and overhaul cycles to keep water-jet looms in good working order. (3) Water-jet looms should further improve the quality of mechanical parts and electronic components, thereby improving the quality and reliability of the entire machine. The relative humidity of the working environment of water-jet looms is high, and the requirements for the control system are also high. This further improves the early trouble-free working time of water-jet looms and reduces downtime due to component failures. (4) Spinning yarn quality: Spinning yarn quality includes raw yarn quality, winding, twisting, warping quality, sizing and paralleling process quality, etc. This is particularly important in chemical fiber production. In chemical fiber production, the proportion of warp and weft breaks due to shaving caused by shaving during winding, twisting and shaping is very large. In order to improve spraying For the production efficiency of water looms, water jet looms use silk slivers that are evenly dried and well shaped. It is best to use an automatic winding machine for winding. The tension during warping should be uniform, the spinning yarn arrangement should be even, the warp beam should be flat, and the selection should be reasonable. The advanced slurry formula and sizing process ensure good pulp shaft quality. (5) Adopt a reasonable operating speed: Under normal circumstances, increasing the operating speed will lead to an increase in the failure rate of warp yarns, broken ends, and weft yarns, as well as an increase in machine material loss. Sometimes the operating speed is relatively low, and the weft insertion rate after the tube is turned on will be reduced, but the production efficiency can still be maintained at a high level. Therefore, a technical and economic speed should be selected to improve the production efficiency of the water-jet loom. .
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