23 common diseases of the hottest corrugated board

2022-10-14
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Corrugated board 23 common diseases can be explained at a time. Everyone in the carton factory must have them

release date: Source: Chinese printing carton browse times: 11908 copyright and disclaimer

core tip: This paper makes a detailed analysis and interpretation of 23 common diseases of corrugated board, including glue opening, false sticking, corrugated, corrugated, wrinkled, blistered, line pressing damage, etc. with it, you don't have to turn over the technical books anymore

cause analysis: (1) glue quality does not meet production requirements or spoils; (2) The amount of glue is too small; (3) The heat of corrugated roll and pressure roll is insufficient; (4) Insufficient pressure of pressure roller; (5) The middle height of the pad roll and pressure roll are seriously worn

solutions:

(1) replace the qualified jiaomaite new aluminum also plans to comprehensively digitize and intelligentize the transformation fluid; (2) Increase the amount of glue; (3) Increase the temperature of pressure roll and corrugated roll to ensure that the machine can be started at a temperature above 180 ℃; (4) Properly adjust the pressure of the pressure roller, so that the lining and corrugated paper are well bonded and the lining paper is not exposed; (5) Polish or damage new pressure roll and corrugating roll

2. Reason analysis of dough paper glue opening

: (1) the glue amount is too small, and the drying locomotive speed is too slow; (2) The glue liquid is thin, and the glue on the rubber roller is insufficient; (3) The hot plate temperature of the dryer is insufficient, and the glue liquid is not fully gelatinized; (4) Drying locomotive speed is too fast and drying is insufficient; (5) The ballast roller on the dryer and conveyor belt did not fall completely

solution:

(1) appropriately increase the amount of glue and increase the speed as appropriate; (2) Replace the mixing solution or add an appropriate amount of emulsifier into the original rubber solution; (3) Raise the hot plate temperature of the dryer to above 180 ℃ and start it up; (4) Reduce the speed; (5) Lower the ballast floating roller

3. Cause analysis of false sticking of lining paper

(1) insufficient temperature of corrugating roller; (2) The glue quantity is too small and the temperature is too high; (3) The speed is slow, causing glue; (4) The viscosity of the glue is not enough

solution:

(1) increase the temperature of single-sided machine; (2) Adjust the glue amount, turn off the heat source, wait until the temperature drops below 180 ℃, and start the machine above 160 ℃; (3) Improve the speed of single-sided machine; (4) Moderately increase the viscosity of the glue

4. Cause analysis of false sticking of facial paper

(1) insufficient temperature of hot plate of dryer; (2) Precipitation and deterioration of glue solution; (3) The cardboard stays in the dryer for a long time

solution:

(1) start the machine when the temperature reaches that the glue can be gelatinized; (2) Replace with new glue; (3) The tissue paper still breaks after reducing the tension of the tension gate valve of the shaft less support of the tissue paper, and the paper cylinder with good tension can be replaced

it is estimated that the paper breaking and resuming time may exceed two minutes. Immediately cut off the single-sided corrugated cardboard, and then continue the paper after the cardboard in the dryer is pulled out, so as to minimize the residence time of the cardboard in the dryer

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II. Corrugation

1. Cause analysis of single-sided paperboard corrugation

(1) corrugation roll wear; (2) The gap between the upper and lower bearing rollers is too large; (3) The weight of tile paper is too large and thick; (4) Too much moisture in tile paper; (5) Tile paper has poor plasticity without preheater

solution:

(1) replace the bearing roller or grind; (2) Adjust the gap between two bearing rollers to 0.5mm; (3) Replace the tile paper; (4) Increase the preheating angle of tile paper; (5) Pass the tile paper through the preheater

2. Reason analysis of double tile back fluting

: (1) the back fluting after gluing by the double-sided machine is caused by the too small gap between the gluing roller and the ballast rod; (2) After the dryer, the floating ballast roll on the conveyor belt cannot move up and down freely and compress the corrugation deformation; (3) If the amount of glue is too large, the corrugated paper absorbs a large amount of water in the glue solution and softens, falling one side along the running direction of the dryer; (4) The quality of tile paper is inferior

solution:

(1) adjust the gap between the double-sided machine, the ballast roll and the gluing roll to slightly less than 0.02 mm of the single-sided paperboard, and insert the single-sided paperboard longitudinally between the ballast roll and the gluing roll, which can be inserted freely and drive the ballast roll to rotate without corrugation

(2) adjust the free movement of the floating roller on the conveyor belt of the dryer

(3) it is appropriate to reduce the amount of glue to evenly distribute the corrugated peak without flowing into the corrugated groove

(4) replace the tile paper

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third, corrugation, high and low corrugation

1, corrugation

cause analysis: (1) single side machine and corrugation roll are not parallel; (2) Corrugating rollers are seriously worn; (3) Insufficient heat at both ends of the corrugating roll; (4) Insufficient tension of tile paper; (5) Uneven tension at both ends of the tile paper; (6) There are sundries such as paper scraps and dust in the vacuum plate

solution:

(1) adjust the two bearing rollers to be parallel; (2) Replace the corrugating roller; (3) Adjust and raise the balance temperature of the bearing roll; (4) Tighten the tile paper brake gate valve; (5) Replace the tile paper; (6) Check the sealing condition of the vacuum adsorption plate, replace the seal, gasket and fastening screw, and clean up the plug hole or the debris in the vacuum plate

2. Cause analysis of high and low ridge

(1) the tension of corrugated paper is too large; (2) Poor plasticity of paper; (3) The tile paper is too thick; (4) Excessive vacuum suction

solution:

(1) appropriately reduce the tension; (2) Spray steam appropriately or increase the preheating area according to the paper; (3) Use small gram weight tile paper; (4) Adjust to the appropriate suction air volume

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IV. wrinkling

1. Cause analysis of lining paper wrinkling

(1) uneven thickness of tile paper; (2) Directly input the corrugated machine without preheating; (3) The braking at both ends of the tile paper is inconsistent; (4) Tile paper moisture imbalance; (5) The paper guide rollers are not parallel

solution:

(1) replace the tile paper; (2) Pass the tile paper through the preheater; (3) Adjust the brake balance of tile paper; (4) Increase the preheating area of the tile paper or replace the tile paper; (5) Correct the paper guide roller

2. Cause analysis of face paper wrinkling

(1) paper guide roller inequality; (2) The paper inlet of the dryer is skewed; (3) Tile paper moisture imbalance; (4) The tension at both ends of the tile paper is unbalanced

solution:

(1) correct the paper guide roller; (2) Correct the paper inlet of the dryer; (3) Increase the preheating area of tile paper; (4) Replace the tile paper

3. Corrugated paper wrinkling

cause analysis: the strength, moisture and thickness of both ends of the corrugated paper are uneven, and the braking is insufficient

solution:

adjust the preheating area, tighten the brake gate valve or turn the tile paper over for use. If there is still wrinkling, replace the tile paper

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v. blistering

1. Blistering of lining paper

cause analysis: (1) uneven moisture of tile paper; (2) Insufficient drum braking; (3) The heat of corrugated roll and pressure roll is insufficient; (4) The pressure roller is worn or not parallel; (5) The rubber roller is worn, and it is difficult to carry glue locally, or there are foreign matters sandwiched between the rubber coating roller and the metering roller; (6) Clean the air suction groove of the corrugated roll and replace the paper guide

solution:

(1) spray steam on the base paper; (2) Check the brake; (3) Check the steam pressure of corrugated roll and pressure roll and the position of suction and drying pipe; (6. Actual sliding speed 4) replace or adjust the pressure roller; (5) Adjust the gap between rubber rollers and correct it; (6) Clean the corrugated roll suction groove

2. Cause analysis of blistering of tissue paper

: (1) moisture imbalance of tissue paper (2) tissue paper is directly input into the dryer without preheater; (3) The viscosity of the glue is not enough; (4) in the negotiation with the upstream raw material supplier, there are paper scraps and rubber blocks between the coating roller and the metering roller; (5) Correct the gluing roller or replace it

solution:

(1) spray steam; (2) Increase the wrapping angle of tissue preheater; (3) Check the glue viscosity; (4) Clean the rubber block of the rubber roller; (5) Correct the rubber roller of the drawing or replace it

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VI. corrugation crushing

1. Cause analysis of corrugation crushing of single-sided paperboard

(1) excessive pressure on pressure roller; (2) Tile paper has short fiber, no toughness and poor quality; (3) The gap between the upper and lower bearing rollers is too small; (4) The preheating area is too large, and the paper loses water seriously; (5) The corrugated roller temperature is too high; (6) The medium height of the corrugating roll is seriously worn. After the pressure roll is lifted, the force on the corrugated paper is unbalanced, resulting in excessive pressure at both ends of the single-sided corrugating roll, resulting in corrugation damage

solution:

(1) appropriately reduce the pressure of the pressure roller; (2) Replace the tile paper; (3) Correct the corrugating roll gap; (4) Reduce the preheating area; (5) Reduce the temperature of the corrugating roller to 160 ℃ and then start the machine; (6) Replace or grind the corrugating roller

2. Cause analysis of corrugation after double-sided machine:

mechanical scratch caused by burrs on the cylinder surface of each paper guide roller or multiple preheater of bridge opening; (2) The buckle of the transmission belt from the overpass to the single-sided machine is punctured

solution:

(1) check whether there are burrs that cause corrugation to break, and polish them smooth with sandpaper or board; (2) Replace the buckle and reconnect it

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VII. Line pressing damage

1. Inner paper rupture

cause analysis: (1) inner paper is too thin; (2) The lining paper is seriously dehydrated and has no toughness; (3) The edge angle of the pressing cam is not smooth; (4) The indentation is too deep

solution:

(1) replace the lining paper or appropriately shallow the indentation depth; (2) The lining paper does not go through the preheater; (3) Replace the arc-shaped crimping wheel or polish the cam edge angle; (4) Properly adjust the pressing depth

2. Cause analysis of facial paper rupture

: (1) inferior quality of facial paper; (2) The indentation line is too deep; (3) The indentation concave wheel is too deep and not smooth; (4) The pressure regulating device fails; (5) The cardboard is too dry

solution:

(1) spray steam on the opposite paper, increase the amount of glue and appropriately increase the drying speed

(2) adjust the pressure line; (3) Replace the indentation concave wheel or polish it; (4) Correct the line pressing adjusting device before reproduction; (5) Appropriately increase the speed of the dryer and turn off some heat sources of the dryer

3. The paper inside is broken

cause analysis: (1) the pressure is too deep; (2) Paperboard simply; (3) The paper is not tenacious

solution:

(1) appropriately shallow the pressure line; (2) Improve the drying speed; (3) Replace the tile paper or spray steam on it

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VIII. Good crimping, uneven and uneven depth

cause analysis: (1) too shallow crimping; (2) The pressure regulating device fails; (3) The crimping wheel is deformed; (4) The pressing cam is seriously worn, and the degree of wear is not considered in production, so the routine operation is still followed

solution:

(1) adjust the deep pressing line until the paper inside is not broken and the pressing line is clear and straight after folding; (2) Correct and repair the line pressing adjusting device to normal; (3) Replace the crimping wheel; (4) The degree of pressure line should be adjusted moderately deep

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IX. cause analysis of facial paper rupture after crimping:

(1) quality of facial paper; (2) The drying locomotive is too slow, the paperboard is seriously dehydrated, and the face paper loses toughness

solution:

(1) replace the face paper; (2) Improve the drying speed

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X. cause analysis of cardboard fracture after molding:

times of tile paper; (2) Cardboard is too dry; (3) Improper adjustment of forming process equipment; (4) The pressing line is too shallow, and the corrugated is not flattened or folded after forming. When the flap is folded, the high-strength corrugated will break the face paper, and the corrugated will break

solution:

(1) replace the tile paper; (2) Ensure that the moisture content of the paperboard is about 10 ± 3; (3) Pay attention to the equipment adjustment of each forming process and adjust it to the best state; (4) The dryer accelerates and increases the amount of glue applied, and the pressing line is deepened

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Xi. Cause analysis of longitudinal hair cutting:

(1) the paper separating knife is blunt or the blade is notched; (2) The upper and lower knives bite too deeply; (3) There is a gap between the upper and lower knives

solution: