Printing machine abnormal sound solve printing machine failure

Failure is one of the unfavorable factors that affect production, and serious ones also affect the quality of printed products. In order to reduce failures and improve work efficiency, in addition to normal maintenance and maintenance of the equipment, the operator must have a certain ability to distinguish. Some faults can be identified by sound, and the position, degree, and cause of the fault can be judged by abnormal sounds so that timely measures can be taken and handled accordingly.

Here are some examples of the common fault sounds:

1. Feeding nozzles make a slipping "click" sound

This is caused by the serious wear of the suction nozzle during long-term use and the smooth suction surface, or the air path is not smooth and the suction is too small. It may be due to the paper being too thick, slippery, or sticky. According to the situation. Generally have the following methods: 1 rubber sleeve on the suction nozzle; 2 the suction surface with a saw blade or sandpaper wipe the scratches, increase friction; 3 cleaning Feida, sparse ventilation; 4 remove the air pump fouling; 5 Paper related processing.

2. The suction nozzles of both suction nozzles have a “buzz” sound

May be caused by the following reasons: First, improper adjustment, suction hole is not correct; Second, the piston fixed screw automatically moves out, resulting in two nozzle angle changes, and paper is not parallel; Third, the air path is blocked, or wind pump air volume small. Sometimes this can happen if the paper is not blown by the blower or the paper is pressed by the presser foot or the paper is blocked by the brush. According to the situation.

3. The roller part emits "drums" when printing

This sound may be caused by loose plate screws on the plate version. The two pull screws in the middle of the clamp will often make a sound if they are loosened. Stop tightening the screws.

4. The upper part of the machine makes a "click" sound, the faster the sound, the louder the sound

This is due to the fact that the ink is too viscous, sticky paper powder, and too much paper, which accumulate on the ink roller. Clean the ink roller and wipe the paper on the heavy roller with a cloth.

5. Suction nozzle, single nozzle emits air-breathing

This is purely a sucker hole. A small screwdriver can be inserted into the suction hole, and the suction hole can be straightened to make it consistent with the nozzle connecting rod.

6. The motor tremors

Once this sound appears, it indicates that the motor shaft and rake are seriously worn. Should stop immediately, find an electrician and maintenance personnel to deal with.

7. The “click” sound of a tapping shield inside the shroud

This is a resonance phenomenon that occurs when the machine is in operation, causing the swinging spring to swing violently and knocking on the guard. The speed can be adjusted properly and the sound disappears.

8. There is a severe drag on the teeth

If this sound occurs continuously after power on, the machine can be shut down and then try to open. This sound occurs and the tooth does not pick up the paper, causing the paper inertia to enter the drum. This is a problem with the tilt shaft. Stopped by hand to move the pendulum shaft head feels shaking, indicating that the pendulum shaft wear is serious, there is a gap between the sleeve. Replace and repair it.

9. Electromagnetic iron has a continuous "click" sound, but the paper stack does not rise

There are many reasons for this, such as electrical problems, disconnection of the electromagnetic iron core, or turning up of a mechanical part, etc., which can cause this malfunction and deal with symptoms.

10. Sudden "squeaky" sound suddenly appeared at Feida's site

This sound is most easily discernible, that is, the mouthpiece is disconnected from the blow tube, and the operator only needs to quickly insert the mouthpiece into the blow tube.

11. KaiFei electromagnet does not absorb sound

Stack the paper and try to open Feida. If the above situation occurs again, it means that the stroke switch on the presser foot is broken and you can replace it. If it is a bad contact, handle it separately.

12. When the operation is started, the motor screams, the machine does not turn

Explain that the brakes are working. The machine can be reversed and then run again.

13. The air pump suddenly makes a harsh "click"

Generally, the hair is too small, and it is inconsistent with the inhalation. Quickly adjust the air pump knob to return to normal.

14. When the sidelines rise and fall, a "click" sound

There are two reasons for this. One is that the pressure regulation of the side gage is too tight; the other is that when the pull roller falls, it is the eccentric roller that touches the lowest point of the cam, and the rhythm becomes longer, which produces a click. Adjust according to the situation.

15. After the paper is stopped, feeder parts such as feeders and belt pulleys all want to move, and randomly issue "click" sounds.

This is because the clutch is not completely separated from the reach of the feeder, that is, the top spring is too tight. Loosen the top spring fixing screw and loosen the top spring slightly.

16. Relying on the version of the roller, the roller undulates and emits a "plash" sound

This is an excessively low adjustment of the water rollers on both sides. Tighten the top screws on both sides and readjust the water roller pressure.