Corrugated cardboard line production must have scientific methods of operation, strict equipment maintenance, can quickly and correctly handle all kinds of common problems in production, and the operators of the machines must achieve a high degree of unity and coordination in order to produce high-quality corrugated cardboard. It can be said that the advantages and disadvantages of the corrugated paperboard produced by an automatic line can fully reflect the comprehensive indicators and level of this corrugated paperboard line. The following is a comprehensive introduction to the actual problems and requirements in the production of corrugated board lines.
Single-sided machine
Operation procedure: Before starting the machine, carefully inspect each steam pipe and steam valve for leakage, and add the specified model of lubricating oil or grease to each lubrication part. According to the specifications of the paper specified in the production notice, the web should be correctly installed on the shaft-free bracket. There is a positive and negative difference in the paper, and the corrugated paper can be used at will. Open the steam valve, start the main motor, run the single-side machine slowly under no pressure, and put the glue into the rubber pan. When the steam pressure rises to the technical requirement of 8kg~12kg (the corrugating roller temperature is above 1600°C), input The base paper runs the single-faced machine slowly and uniformly, opens the pressure valve of the corrugating roller and the pressure roller, and delivers the single-faced corrugated cardboard to the flyover. Before closing the class, reset the sizing roller, close the compressed air valve and heat source, open the helium-pass valve to discharge the remaining steam and condensate in the purifier, lower the speed of the single-sided machine and let it idle, and use the clean water to transfer the sizing roller. The paddles and paddles are cleaned, and the paper scraps and charred puddles on each roller are removed. Before the temperature of the corrugating roller is lowered to 1000°C, the machine can be shut down to maintain the equipment and site hygiene. When the machine is decommissioned for a long period of time, it is necessary to apply rust-proof butter to the surface of each roller. It is often necessary to check whether the valves and joints are working properly and whether the various instruments are sensitive and accurate.
The requirements of this position: 1 The operator must fully understand the working principle of the single-sided machine and the working principle of the entire corrugated board production line, and be able to skillfully operate the single-sided machine, and must strictly follow the operating procedures. 2 Check the steam pressure and equipment operation conditions at any time during production, and find that abnormalities are dealt with in a timely manner to avoid failures and efforts are made to reduce unnecessary losses. 3 When the input paper and tile are pressed together, or when the input paper and corrugated paper are pressed in, the edges must be aligned. 4 Carefully monitor the web's operation to prevent paper breaks. 5 at any time to check the molding and bonding of corrugated board, to prevent poor adhesion of corrugated board. 6 Do not open the glue too much to prevent the glue from affecting the use due to the fast circulation. 7 When cleaning the pulp tray of a single-sided machine, cold water cannot be flushed onto the corrugating roller to prevent the corrugating roller from deforming due to a large temperature drop. 8 It is best not to shut down the entire line when replacing the same quality and same specification of the base paper. 9 In the production, the production of single-sided machines should be adjusted according to the stock of cardboard on the overpasses. There should not be too much single-sided corrugated cardboard stacked on the overpass. Non-equipment failures and paper causes cannot affect the speed of the double-sided machine. 10 Master and deputy operators have responsibilities and obligations to resolve quality accidents and hidden dangers that occur in this position at any time.
Flyover
Operation procedure: Apply oil to each rotating part, accurately penetrate the single-sided corrugated cardboard output from the single-side machine into each paper guide roller in order, and send it to the triple preheater; then the two-layer cardboard paper The device is aligned up and down and adjusted to be slightly wider than the cardboard. The left and right displacements are determined according to the vertical cutting specifications. After the production is normal, the side baffle is clamped and the tension of the single-layer corrugated cardboard is adjusted to accurately align with the operator. The edge of each layer of paper; Correct the skewed direction of the single-sided paperboard, single-sided cardboard at the end of each product passes over the bridge; guide the paper holder, and control the length of the paper, avoiding the single-sided corrugation of the dryer Misalignment or length error of the cardboard tail and face paper tail is too much waste.
This post requires: 1 strictly in accordance with the operating procedures. 2 When breaking the paper joint, quickly and accurately connect the broken part. 3 During the production process, the single-sided cardboard on the overpass must be inspected at any time. If any unfavorable conditions or paper diseases are found, the information shall be fed back to the double-sided machine and single-sided machine in time. 4 When there is excessive stacking of cardboard on the single-sided flyover, it shall indicate that the single-side machine decelerates and flips the cardboard on the overpass to prevent the cardboard from tearing during high-speed operation and, if necessary, to indicate the deceleration of the double-sided machine. 5 When there is a single-sided cardboard joint passing through the paper gripper, the paper gripper should be loosened slightly so as to avoid breaking the single-faced corrugated cardboard on the overpass again.
Double-sided machine
Operation procedures: Before starting the machine, check carefully whether the various electric appliances and steam valves are normal, and add the specified lubricant to each lubrication part and the chain sprocket, and then open the steam valve of each preheater, according to the number of layers of production paper, in the corresponding Put the glue in the plastic disc, adjust the clearance between the floating roller and the sizing roller to be 0.2mm smaller than the thickness of the single-sided cardboard to be passed, and the gap between both ends should be even and equal, and install the required surface on the shaftless bracket. The paper requires that the noodle layer is down. After starting the machine, observe whether the sizing amount is appropriate. If it is improper, adjust it. After the single-sided cardboard and noodles are delivered from the triple preheater, pass through the preheating roller, the sizing roller, and the single sheet. Align the cardboard with the front paper and send it to the hot plate. At the same time, observe whether the glue amount is normal and check whether the glue is evenly distributed on the tile roof. After the production is completed, lift the ballast roller, close the valve, release the glue in the plastic disc, clean the rubber roller, clean the plastic disc, turn off the heat source, open the valve, let go of the remaining steam and condensation in the machine, lift Lift up the conveyor belt and remove debris, keep the equipment and the site clean.
This post requires: 1 to fully grasp the working principle of the cardboard line, and strictly follow the operating procedures. 2 When the paper is turned on, pay attention to the front and back sides of the sheet of paper. The layers of paper must be aligned. The misalignment of the surface paper and single-sided corrugated cardboard should not exceed 5mm at most. After the equipment is running normally, check the adhesiveness of the corrugated cardboard. 3Before the production, check the quality parameters of the glue. 4 According to the paper, air pressure, single-machine operation conditions, a flexible grasp of the entire line speed.
Cross cutting machine
Operating procedures: Check carefully before tightening the fastening screws are loose, whether there is an abnormal knife and sipe, pressure line, whether the paper conveyor belt deviation, through the inspection and timely removal of hidden dangers. When changing the blade of the slitter (bowl blade), check whether the thickness of the blade is consistent and inconsistent. Check whether there is dust and scale on the blade holder. If there is any, remove the blade completely before loading the blade. The blade may be damaged, or the upper and lower blades may not be brought close to create a gap, so that the edge of the produced corrugated cardboard has a burr, and the depth of the bite of the upper and lower blades should not be too deep.
Operation slitting thin blade machine, especially changing gauges, adjusting gauges, moving tool holders should be operated according to the program, pay attention to the direction of the cutting edge, when replacing the slitting blade, due to the thin knife (also known as carbide cutting knife), has a high The wear resistance, hardness and brittleness, and correct use can improve the cutting effect of corrugated board and prolong the service life of the blades. On the other hand, it is very easy to cause the blade to break. Take special care to prevent the blade from hurting the human body.
For mechanical cross-cutting, when adjusting the cross-cutting length of the corrugated board, attention should be paid to the control requirements of the speed regulation. Taking the model with a design speed of 120 m/min as an example, the machine speed must be run to 40 m/min. Above can adjust the specification, otherwise the machine will run normally, the crosscutting length will have a big error, and it is difficult to adjust. For the computer automatic cross cutting machine, only the relevant cross-cut parameters can be input into the machine.
This post requires that before starting the machine, you must first read the construction order, process requirements, and technical parameters. Strictly adjust the slitting and cross-cutting specifications according to the rules and regulations. Verify the accuracy and then start the machine. Pay attention to the sharpness when adjusting or changing the knife. The blade can only be checked when the spindle stops rotating. Before starting the machine, it is necessary to inform the relevant machine in advance. When a paper jam occurs, the machine must be stopped immediately to remove the cardboard. Before adjusting the knife or turning the slitter or cross cutting machine by hand, the power must be cut off. In case of any unexpected occurrence during production, the emergency stop button should be immediately pressed to stop the production line and wait for the problem to be completed before starting up. . In production, we must strictly control the production quantity of products, clear out defective products, identify the semi-finished products that have been produced, and fill out the on-shift production reports. Before finishing the shift, we must clear the production site, clean the house, and cut off the power before we can leave.
Corrugated board output and stacking
The requirements of this post: Before starting the machine, lubricate the lubrication parts of the equipment. The product is placed in five layers. Each of the 10 layers is a hand. Each of the three layers is a hand. Each hand is turned over, and it is placed in a wrong position. The borrow portion is not more than 10cm. .
Each batch of products must be marked with the product name, production date, product specifications, and production quantity, and be placed in the designated place as required. Ensuring that logistics is in order does not affect production.
During the production process, unqualified products must be cleared at any time. Operators must clean up the site and do a good job of hygiene before going off work.
Automatic line adhesive production
You must make the glue in advance before starting the automatic line. All materials must be pounded and metered before making the rubber, and the rubber must be made according to the formula and the glue making procedure. It is necessary to supply the prepared glue to each machine in time, and the equipment must be cleaned and cleaned on site after the glue is drawn. And prepare the material under the barrel of glue. During the production process, the adhesive viscosity, paste point, and especially the adhesive temperature of the adhesive must be monitored during the summer to ensure that the adhesive quality parameters in the production process are always in the best condition.
During the production process, attention should be paid to the changes of steam pressure and compressed air pressure at any time to ensure that the required temperature for production is normal and the pressure of the compressed air is normal.
(Huang Yuerong)
Reproduced from: Shanghai Packaging
