Trouble causes and troubleshooting of the hottest

2022-08-06
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Causes and troubleshooting of folding machine

1. there are two or more sheets of paper feeding

① cause: 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: insufficient wind force at the paper separating suction nozzle and improper height of the paper loosening blowing nozzle

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

③ cause: the paper is thin and the suction air volume is too large. Take up the paper below the first sheet

Troubleshooting: properly reduce the air suction volume or replace the rubber suction nozzle with a leather ring suction nozzle with less suction for thin paper

④ cause: the paper cannot be blown loose or the paper edge has adhesion

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 paper stack shall be appropriate for normal operation, and the interval between them shall not be too long; Check the four sides of the paper stack for any stickies and eliminate them to make them loose and work normally

⑤ cause: 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 height of the lower part of the rear edge of the paper stack consistent with the height of the front edge

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

① cause: insufficient air suction at the paper separation suction nozzle and the paper transfer roller, resulting in missing sheets

Troubleshooting: properly 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 paper 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 block 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 shall be replaced in time

④ cause: the paper stack is not flat, which makes it difficult to suck paper, and the paper is skewed after being sent out

Troubleshooting: the paper loading shall be flat

⑤ cause: the air volume in front of the paper stack is insufficient, which 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 paper is skewed after entering the paper feeding shaft due to inconsistent pressure of the paper pressing roller, improper tightness of the conveyor belt, and unequal pressure of some paper pressing balls (or wheels)

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

3. the page number is not neat

① cause: the pressure of the paper pressing ball (or paper pressing wheel) is inconsistent or improper

Troubleshooting: properly adjust the pressure 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 adjust the distance between the blade and the tool ring according to the correct spacing

③ cause: 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

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

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 it is damaged or broken

Troubleshooting: adjust the tightness of each conveyor belt and replace the damaged belt

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

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

Troubleshooting: it is difficult to obtain 10 points for high-quality products by adjusting the folding knife 3, which is 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 cause: 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 properly adjusted

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

④ cause: the punching knife is improperly installed

Troubleshooting: adjust the punching knife to make the position of the cut consistent with the crease

⑤ cause: the concept of "one cut" is integrated into the concept of "one start" by positioning, and the length of one stitch 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 drawing gauge does not pull the paper in place or the paper is wrinkled

① cause: improper pulling force of pull gauge

Troubleshooting: set the pulling force of the pulling gauge according to the standard that the pulling gauge is aligned with the page

② cause: the height of the gauge pressboard is not appropriate

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

③ cause: improper paper feeding position

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

④ cause: the page is warped or folded

Troubleshooting: check carefully after paper collision and ensure that the paper is loaded smoothly

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

① cause: the paper feeding is skewed

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

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

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

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

Troubleshooting: see 1. there are two or more items in the 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 deviation between the punching knife and the crease

① cause: 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

Yangtze Research Institute has also explored the elimination methods for environmental protection water-based coatings: check all links of the paper during the transportation process and adjust them correctly as required

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