The solution to the loose side problem of jet loom is discussed. Analyses the causes of loose edge, basically have: edge yarn, waste yarn of drawing-in method set, shear time, temple position, jet pressure, Hank yarn tension, opening time, heald frame height, etc. By taking measures in the above aspects, we solved the loose side problem, reduced the filling stop, and improved the efficiency of the loom and the rate of warehousing of the products.
The reason for the loose side
As is known to all, air jet loom
has the characteristic such as high speed, high efficiency, high quality, but, if you want to play to its characteristics, it must have a high quality of raw yarn, the quality of the semi-product quality, reasonable process parameters and quality equipment maintenance and operation technology level. Since the operation of the air-jet loom, we have been fully prepared in the original yarn and half products, which guarantee the production conditions. But found that after large area on the production, the production efficiency is not very ideal, most problems loose edge machine, weft stop phenomenon is very serious, 100000 number of weft stop generally at about 10 times, loom efficiency is only about 80%. To this end, technical personnel carry out research and attack. Through the analysis, think the influence of the main causes of weft stop: side heald method, waste yarn, yarn shear time, temple position, jet pressure, Hank yarn tension, opening time, heald frame height, stretching nozzle process Settings, etc.
Major technical measures
(1) Changing the method of dressing the edge yarn. Try to put the side yarns in front. For example, the twill weave will be changed from 3434 to 1414. The twill will be changed from 6767 to 3636.
(2) The waste side yarn is made of 6 ~ 8 roots and must be a strand line. The thickness of the yarn should be equal to the thickness of the yarn.
(3) Adjust the cut time. Early to cause loose edge shearing time, can be changed from the original 20 ° to 26 °.
(4) Adjust the position of the edge. Hold the first ring to the edge of the cloth.
(5) Adjust the various jet pressures. Principle: constant jet pressure < shearing pressure < main injection pressure.
(6) Adjust the tension of the Hank yarn. In principle, on the right side of the left hand, the ground tissue warp is at the time of 29tex.
(7) Adjust the opening time. Weft arrival time is 230 ° opening time is 290 °, weft arrival time for the opening time is 310 ° 240 °.
(8) Height setting of heald frame. After groping, the height of the fabric frame of the plain weave fabric is 74mm, 72mm, 70mm and 68mm respectively. The height of twill weave frame height is 74mm, 72mm, 70mm and 74mm respectively. The height of twill weave frame is 72mm, 70mm, 68mm, 66mm, 72mm and 70mm respectively. The height of twill weave frame height is 68mm, 66mm, 64mm, 62mm, 60mm and 64mm respectively.
(9) Stretch nozzle positioning should be appropriate. Use 4 g 3 degrees to make the weft straight.
By adopting change drawing-in method, set up waste yarn, adjust shearing time, temple position, jet pressure, Hank yarn tension, opening time, heald frame height, effectively solve the problem of the loose side, reduces the zonal stop machine, improve the efficiency of the loom and the rate of the incoming grade a products, in order to improve the economic benefits of our company provides technical assurance.