Textile Machinery: Optimization Of Air-Jet Looms

　　 Method 1

Pay attention to repairing opening arm to ensure air-jet loom efficiency.

Pan Xiaofeng, Shaanxi eight party Textile Co., Ltd.

ZA202i, ZAX-e and other models. Air-jet loom The opening arm is easy to damage, which affects the loom efficiency. Our company summed up some experience in the maintenance process.

The first is to use the imported open arm rotor bearing as far as possible to ensure the riveting quality of the open arm rotor bearing, the splint and the open arm arm. According to the standard of the open arm, the needle roller bearing of the open arm is rigorously assembled to ensure the quality of the open arm is qualified. The second is to select a better cam disc with strength, hardness, smoothness and wear resistance, so as to ensure the contact between rotor bearing and cam surface as surface contact, enhance running stability and reduce wear. Third, to ensure that the heald frame runs smoothly, reduce the number of roots of the heald spring as far as possible, and further reduce the force between the open arm rotor and the cam disc, so as to reduce wear. The fourth is to ensure the quality of the camshaft oil, enhance the lubrication of bearing and cam, reduce wear. The fifth is to assemble the cam according to the standard specification to ensure that the bolts are tightened and the clearance is proper. The sixth is to ensure that the cams of the cam box are fully integrated to ensure smooth operation of the cam and open arm rotor and reduce the damage of the open arm. The seventh is to rationally determine the loom speed and reduce the damage of the opening arm according to different models.

According to the above points for attention, the number of broken cars caused by the damage of the opening arms of our 374 air-jet looms has decreased from 80 units per month to less than 40 units per month, which has indirectly increased. Loom efficiency The effect is better.

　　 Method two

Isolate stranded wire and belt to prevent failure of stranding machine.

Yangzhou Heng Cheng Weaving Co., Ltd. Cui Shaohong Fan Tiejun

The air-jet loom is equipped with an electronic hinge device, driven by a synchronous motor to drive the stranding belt, and the two stranded wires worn on the stranding belt guide are twisted together with the belt to clamp the weft yarn. The structure is simple and the adjustment is convenient. The drawback is that the twist wire is twisted inside the belt, which is easily wrapped around the belt and wound around the belt pulley, causing the belt pulley to die, causing the hank stop to stop failure and affect the weaving efficiency of the loom. For this reason, we have reconstructed the head of the hank.

The specific method of transformation is to use a 2 mm diameter lead wire to form a flat spring. Remove the tongue shaped lead wire on the head of the stranding machine, install the flat spring, and tighten it with screws. The twisted edge wire is twisted inside the flat spring. The role of the flat spring is to completely separate the hank wire from the side belt and the pulley, so that the twist wire can not touch the side belt and the pulley. After modification, the stranding device is used normally, and no twisted edge wire is wound around the belt, so that the belt pulley is stuck inside the belt pulley, resulting in the problem of handing and stopping. Practice has proved that this transformation is successful.

　　 Skein belt The two guiding yarns will be damaged after long running, but the stranding belt is not damaged. Throwing away the side belt will result in waste. The specific method is to use waste O shaped heald as material, and a O shaped heald can be used as two yarn guides. Two holes on the heald line are used as the guide holes of the stranded wire, and 2 ends of the ends of the heald are cut 2 centimeters long, and then two holes are punching. The use of the stranding belt after normal repair and repair is normal. The strand has no broken ends. The edge effect is good. It does not affect the quality of the selvedge and the efficiency of the loom. The stranding strap can also be used for another 3~5 months.

　 Method three

Retrofit the fastening position of the rear beam to solve the problem of screw breakage.

Yangzhou Heng Cheng Weaving Co., Ltd. Cui Shaohong Fan Tiejun

The MYTHOS TEX and MYTHOS HI DRIVE air-jet looms are double rear beams, which are more suitable for heavy fabrics and are conducive to reducing transverse defects. The efficiency is higher than that of the single rear beam type, and the quality of cloth is good. However, there is a problem of frequent breakage of the fixing screws of the rear beam. When the heavy fabric is woven, the lower rear beam fixing screws are broken every day, affecting the production efficiency.

There are two reasons for the breakage of the fixing screw of the lower rear beam: first, the warp tension of heavy woven fabric is large, and the force of the lower rear beam is also large, and the fixed screws are prone to fatigue fracture. In addition, the lower rear beam is fixed on the rear beam base by eccentric shaft. The eccentric shaft horizontally deflected to the front of the machine, and the gravity behind the rear axle rotates downward to the eccentric shaft. The torque generated by gravity has shear effect on the fixed screw, causing the screw to break.

We decided to reconstruct the fixed part of the rear beam. The specific method is: first, the fixed block above the back beam is changed from a rectangle to a convex shape, and the thickness of the iron block is still 10 millimeters. Secondly, the eccentric shaft connecting the rear beam is changed from horizontal to oblique downward 45 degrees, and the original two screw threads are fixed horizontally and a screw is downwards fixed, and the two screws are fixed downward and 45 degrees downward. After this transformation, the distance from gravity to the fixed point becomes smaller, the torque becomes smaller, the shearing effect on the screw becomes smaller, and the torque of the screw becomes smaller, so that the screw is not easy to fracture.

We compare the production situation after transformation with that before transformation. Before the transformation, the loom production efficiency was 88.65% (6 months average), the horizontal bar was 2.97 / km, the loom production efficiency was 89.73%, and the transverse bar was 2.91 / km. The screws were broken every day before renovation, and no breakage occurred within 6 months after the transformation. It can be seen that this transformation improves the production efficiency of looms, and has no influence on the quality of cloth surface, and solves the problem of the fracture of rear beam screws.

?