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Analysis: 9 Key Points For Button Maintenance

2010/7/27 14:56:00 67

As modern

clothing

One of the important tools in production.

Button sewing machine

It is the most commonly used equipment in clothing enterprises, and the phenomenon of jumping needle is also a common failure phenomenon in practical operation.

As we all know, the cause of the needle jumping machine is very complicated. Next, the author takes the LK3-438 button sewing machine as an example. The following reasons are analyzed for the reason and troubleshooting of the skipping needle, which is for reference only.

1. check whether the needle is gross, blunt and bending.

If there is such a phenomenon, the machine needles should be replaced in time.

The machine needles are generally TQ1, TQ7 and DP17. According to the fabric and buttons, the machine needles of different specifications and types can be selected.

2. is the tension of the wire board and the take-up spring too large?

This tension should be consistent with the tension of the shuttle.

The LK3-438 button sewing machine has two upper and lower clamping devices. Generally, the thread clamping device should not be adjusted too tightly. If it is too tight, the thread on the pinhole of the machine will be very short after parking. If it is too loose, it will be very long if the thread is loose.

The lower clamp device mainly controls the tension of the surface line, generally 50 grams.

3. check whether the spindle tip of the swing shuttle is gross or blunt. If there is such a phenomenon, it is necessary to repair or replace the new swing shuttle in time.

4. check the shuttle.

Hook line

Is it premature?

Adjustment method: when the needle bar is at the lower dead center, the swing point and the left side of the needle center line should be 3 millimeters. When the needle reaches 2.5 millimeters, the shuttle tip is just at the center line of the machine needle. At this time, the spindle tip is 2 mm above the pinhole of the machine.

The clearance between the shuttle tip and the machine needle is 0.1 millimeters. The gap between the shuttle tip and the needle is too frequent.

5. check whether the clip is worn or not. If the nut is swaying around, you should change the nips in time.

6. check whether the swing time of the clip is too fast or too slow.

The adjustment method: turn on the head, unscrew the 3 positioning screws on the cloth wheel, move the cloth wheel about or slightly, so that when the needle moves away from the button 10 millimeters at the time of lifting, the button will start to swing. When the tip of the needle is close to the button 10 mm, the clamp should stop swinging.

7. check whether the swing of the button is consistent with the button hole, and whether the needle is at the center of the button hole.

If the discrepancy does not match, the swing width should be re adjusted.

8. is it necessary to pad the paper under the presser foot when it is buckled? If it is to change the pad paper under the foot to the loose thread hook, because pressing the pad at the foot will affect the stability of the needle ring and easily lead to the needle jumping.

There is a certain difference in the structure between the 9. brothers LK3-438 button machine and the 1852 button machine.

In the practical application, brother LK3-438 button sewing machine is easy to take off several needles when the needle is not on the line. The result is that the bottom line can not stabilize the bottom line, causing the bottom line allowance to be less after stopping the thread, and when the second time starts, the bottom line can not be reached.

Through careful study, the author made some improvements on the dial board, and the effect is very good. The phenomenon that the needle is not on-line is obviously reduced.

In addition, the author will improve the manufacturing method of the dial board.