How To Strengthen The Management Of Roving Frame

< p > the parts of the roving machine, such as the false twister and the flyer, are the key parts affecting the roving yarn, and their running state directly affects the yarn evenness of roving.

The first line exchange column will discuss the operation of the parts such as the false twister and the flyer of the roving frame, hoping to be helpful to the enterprises.

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< p > < strong > method 1 strengthening equipment maintenance < /strong > < /p >

< p > < strong > reduce roving process irregularity, short details < /strong > < /p >.

< p > < strong > Henan Xinye textile Limited by Share Ltd < a href= "http://www.91se91.com/pioneer/ > > Yang Hong weight > /a > /strong > /p >

< p > recently, our company has occasionally produced large area short details in the roving process of elastic yarns.

After 26.5 times drafting, the spun yarn has long, long details and obvious details, forming obvious details on the surface of the woven fabric.

In order to solve these problems, we have found the following problems: first, roving parts are too elongated to produce details in the weak ring yarns.

The position of the arc is not proper, the spindle's running balance is not good and so on.

The gear of the roving drafting system has larger gear gaps or meshing too loose, and the shaft pin and the keyway are loosened loosely, resulting in the asynchrony of starting or shutting down, resulting in an unexpected draft of the bar at the weak ring and creating details.

The pressure of the roving back gear roller is insufficient, or the slewing of the rollers or the mouthpiece plugs will increase the drawing force and form details.

The potential failure of the main motor or the variable-speed converter of the roving machine causes the acceleration or deceleration of the switch car to change too much, and the yarn stripe is stretched on the weak ring to produce details.

The temperature and humidity are small, especially the uneven mixing of fibers, the short fiber rate is high, and the roving twisting coefficient is small, and the fiber holding force is weak.

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< p > according to the cause analysis, we organized the whole fleet to calibrate the key parts of the equipment, such as pressing the arc and position, the meshing condition of the bobbin teeth, the spindle teeth, the spindle level, the dynamic balance, the engagement of the drawing gear, the twist teeth, the matching of the axle pin and the key, and engaging the electrical engineer to diagnose and repair the roving machine starting and closing the slow speed device.

At the same time, we should strengthen cotton packing, cotton catching, mixing cotton, temperature and humidity management to ensure that the cotton fibers are evenly mixed, and the temperature and humidity are appropriate. Moreover, the roving twist can be properly raised under the condition that the yarn is not hard enough to enhance the cohesion of the fibers and reduce the weak ring roving.

The above measures are effective, and the details of < a href= "http://www.91se91.com/news/index_c.asp" > roving "/a" have been basically checked and eliminated, which has solved the outstanding problems of users.

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< p > < strong > method two polishing flute groove < /strong > < /p >.

< p > < strong > to solve "a href=" http://www.91se91.com/news/index_h.asp > cotton mouse > /a > yarn defect problem < /strong > /p >

< p > < strong > Hebei Taihang Machinery Industry Co., Ltd. Shi Zhenqi Wang Feng < /strong > < /p >

< p > in the roving full yarn doffing, we often find that the big neps with different color, thickness and length fall into the roving reel, or may be attached to roving, mixed in the rolls, not visible from the surface, but coarse yarn defects appear in the spinning process.

The color and shape of this NEP are like rats, so people call it "cotton mouse".

"Cotton mouse" the center of both ends is thick, short 30 millimeters, 56 millimeters long, some are gray, and some are pale yellow.

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< p > analysis found that this yarn defect was produced by a coarse spindle wing twister.

The spindle twister is the main part of roving yarn. Because of the machining error, the diameter of the inner ring of the false twister is usually larger than that of the inner diameter of the flyer.

When the false twister is fully inserted, the inner ring will be extruded and formed into flanges by the inner hole of the flyer.

The false twisters often have burrs on the flanges. When the roving passes, impurities such as flying flowers, short linen, seed chips and leaf chips gathered on the roving strip are caught by the burrs on the edge of the false twister.

Gradually forming a "coarse cotton mouse" with two ends.

The "cotton mouse" becomes thicker and thicker. When it fails to hang up, it will fall off along the false twister and twist with the roving bar on the roving ingot to form a yarn defect.

In spinning process drafting process, winding quality on spinning spindle causes uneven quality and uneven quality.

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< p > in order to solve this problem, we need to take off the flyer and turn the stainless steel tube into the stainless steel tube. The groove of the flyer is further polished to remove burrs, then the stainless steel tube and the flyer are pressed together, and then the false twister is installed.

After repair, the false twister and the flyer match well, avoiding the "cotton mouse" and reducing the yarn faults.

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< p > < strong > method three improving roving false twister < /strong > < /p >.

< p > < strong > reduce the broken ends and uneven evenness > /strong > /p >

< p > < strong > Nantong Chongchuan textile technology development and operation Department Zhang Zhen < /strong > < /p >

The quality, height, shape and quantity of high efficiency false twister used in roving frame directly affect the quality of roving products. < p >

In recent years, we have developed the improved rubber high efficiency false twister for FA458, FA401 and FA402 roving frames. Because of the remarkable effect of reducing the roving yarn CV value, CVb, 2 cm mechanical wave and reducing the broken ends of roving, it has been popularized in many spinning enterprises with heavy weight and high efficiency.

With the further application of roving weight, quantitative spinning and large draft spinning and the production of combed super fine yarn, the quality requirements of roving products are getting higher and higher. Based on the experience of improving the rubber twister of FA458, FA401 and FA402 roving frames, we have improved the false twisters used in EJ521, HY491 and Japanese Fenghe roving machines.

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< p > the original false twister triangle 12T coarse tooth is changed into circular arc 12T fine tooth, and the tooth height is changed from 1 millimeter to 0.3 millimeter (1 mm wide and 5 mm in length), so as to reduce the jitter of the yarn in spinning process, reduce the CV value of roving yarn, and CVb and 2 centimeter mechanical wave.

The height of the front row false twister is changed from 18 millimeter to 10 millimeter, and the back row false twister remains as high as 18 mm, to increase the guide angle of the roving of the front row, reduce the size of the guide angle of the roving yarn, the roving false twisting efficiency, the roving elongation and the CV value of the roving yarn.

The material of the false twister used in the EJ521 roving frame is made of polyurethane instead of abrasion resistant rubber. The friction coefficient of the wear-resistant rubber material is large and the false twisting effect is steady, so as to reduce the jitter of the yarn in the spinning process, reduce the CV value of the roving yarn, the mechanical wave of CVb and 2 centimeters, and the broken rate of the roving.

The old rubber false twister used in HY491 and Japanese Fenghe roving machine has been used for 3 to 5 years. After aging for a period of 5 to 5 years, the phenomenon of surface aging, polishing and friction coefficient has been reduced. A few serious people can make the roving spinning segment obvious twist, roving forming loose, elongation increasing, weight lighter, broken ends increased, roving weight CV value, single strong HY491 value increased, spinning details and breakage increased, especially when producing heavy weight roving, so it is necessary to call the improved rubber false twister when changing regularly.

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