Fault causes and troubleshooting of the hottest fo

Causes and troubleshooting of folding machine

1. there are two or more sheets of paper feeding

① reason: the paper blocking brush is too low or extends too much into the paper stack, so that the paper cannot be fully blown loose

Troubleshooting: according to the operation and positioning requirements, adjust the brush to the correct position and blow the paper loose

② cause: the wind force of the paper separating suction nozzle is insufficient, and the height of the paper loosening blowing nozzle is inappropriate

elimination method: the suction force (amount) can be appropriately increased according to the nature and requirements of the paper; According to the positioning requirements, the paper blowing nozzle can blow about 6 sheets of paper on the surface of the stack

③ reason: the paper is thin and the suction air volume is too large, so take up the paper below the first one

Troubleshooting: appropriately reduce the air suction volume or replace the rubber suction nozzle with a leather ring suction nozzle with less suction that is suitable for thin paper

④ cause: the paper cannot be blown loose or there is adhesion at the edge of the paper

elimination method: adjust the air volume of the blowing nozzle to the standard level to loosen the paper according to the paper; The height of the paper stack should be appropriate to the normal operation, and the interval time is not easy to be too long; Check whether there is any sticky matter on the four sides of the paper stack and eliminate it to make it loose and work normally

⑤ reason: the front edge of the paper stack is too high

elimination method: reduce the height of the front edge of the paper stack or add a wooden wedge to make the lower part of the back edge of the paper stack higher and consistent with the height of the front edge

2. the paper feeding is skewed or broken (i.e. missing)

① cause: insufficient air absorption of the paper separation suction nozzle and the paper delivery roller, resulting in missing sheets

elimination method: appropriately increase the air volume of the paper separation suction nozzle and the paper delivery roller according to the paper, or replace the large ring rubber suction nozzle with large air volume

② cause: the paper separation suction nozzle and the paper delivery roller suction nozzle are not in good contact with the paper, and the suction surface of the suction nozzle is not parallel to the paper surface

Troubleshooting: correctly adjust the flatness of the paper surface and the coordination of the paper separation and paper delivery suction nozzles

③ cause: like the leather suction nozzle stained with ink blocks or worn and leaking; The suction nozzle or air path is blocked by paper scraps or oil dirt, causing the paper to skew and leak during transportation

Troubleshooting: regularly check and keep the rubber suction nozzle and gas path clean, and clean it at any time to ensure the smoothness of the gas path; If the rubber suction nozzle is worn and leaks, it should be replaced in time

④ reason: the paper stack is not flat, which makes it difficult to suck paper and skews the paper after it is sent out

Troubleshooting: the paper loading should be flat

⑤ reason: insufficient air volume in front of the paper stack makes it difficult for the paper to move forward or cannot be sent out, resulting in paper skew

elimination method: appropriately increase the air volume of presser foot blowing nozzle and increase the front blowing nozzle according to the paper

⑥ cause: the pressure of the paper pressing roller is inconsistent, the conveyor belt is not tightened properly, and the paper skews after entering the paper feeding shaft caused by the unequal pressure of some paper pressing balls (or wheels)

elimination method: correctly adjust its position according to the paper and the operation positioning requirements

3. the page number is not neat

① compensation for engineering losses caused by reasons: the pressure of the paper pressing ball (or paper pressing wheel) is inconsistent or inappropriate

Troubleshooting: adjust the pressure appropriately to make the pressure consistent

② cause: the punching knife is not sharp or the blade and knife ring are improperly installed

Troubleshooting: replace the punching blade, and set the distance between the blade and the knife ring according to the correct spacing, because they can see the advertisements of these imported instrument manufacturers in all channels

③ reason: the length of the positioning needle (i.e. knife needle) on the folding knife is inappropriate

Troubleshooting: properly adjust the positioning needle to make its length consistent

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④ reason: the folding knife is not parallel to the folding roller, and there is a sound of friction with the folding roller

Troubleshooting: adjust the blade of the folding knife to align it with the gap between the two folding rollers and ensure that it is parallel to the axis line of the folding roller

⑤ cause: the tightness of the conveyor belt is inconsistent, and there is damage or breach, etc

Troubleshooting: adjust the tightness of each conveyor belt to be consistent, and replace the damaged belt

4. the edge of the book sticker is not long or skewed

① reason: the height of both ends of the folding knife is inconsistent, that is, it is not parallel to the folding roller

Troubleshooting: adjust the folding knife to be parallel to the axis line of the folding roll, so that the height of both ends is the same when the sheet is pressed into the gap of the folding roll

② reason: the two ends of the folding roller are not tight, that is, the spacing between a pair of folding rollers is different

Troubleshooting: adjust and cut the axis lines of a pair of folding rollers to make them parallel

③ reason: the rules of a certain discount are not adjusted properly

elimination method: check the rules of each discount in turn and adjust them

④ cause: the punching knife is improperly installed

elimination method: adjust the punching knife so that the position of the cut is consistent with the crease

⑤ reason: the length of the positioning needle is inconsistent. Improper brush pressure or distance

Troubleshooting: properly adjust the positioning needle to make its length consistent. Set the brush position correctly as required

5. the paper is not pulled in place by the puller or the paper is wrinkled

① reason: the tension of the gauge is improper

elimination method: take the pull gauge as the standard, with a total investment of 10.75 million yuan, and adjust the pull of the pull gauge

② cause: the height of the gauge pressing board is not appropriate

Troubleshooting: adjust the height of the pressboard appropriately according to the time of drawing the paper and the thickness of the paper

③ reason: improper paper feeding position

Troubleshooting: check all links of the paper in the conveying process and adjust it correctly as required to ensure that the paper is fed in place

④ cause: the page is warped or has a corner

Troubleshooting: carefully check after paper collision, and be flat when loading paper

6. the sheet is blocked or torn during the sheet conveying

① reason: the paper feeding is skewed

Troubleshooting: check all links of the paper in the conveying process and adjust it correctly as required to ensure that the paper is fed in place

② cause: there are corners or cracks, adhesions, etc. on the page

Troubleshooting: check whether there is paper in the paper collision, and remove the damaged paper

③ reason: there are two or more sheets of paper fed by the paper feeder

Troubleshooting: see 1. there are two or more pieces of paper feeding

④ cause: the pressure bar and pressure wheel are too low, and the page transmission is not smooth

Troubleshooting: properly adjust the distance between the high pressure rod and the pressure roller

⑤ cause: the transmission line is broken or broken

Troubleshooting: replace the conveyor belt

7. There is an error between the deflection of the punching knife and the crease

① reason: the position of the folding knife and the folding roller is improper, skewed or not parallel

Troubleshooting: adjust and cut the blade of the folding knife to align it with the gap between the two folding rollers, and ensure that it is parallel to the axis line of the folding roller

② cause: skew or obstacle during paper feeding

Troubleshooting: check all links of the paper in the conveying process and adjust it correctly as required