Winter is the season when the problem of bursting lines in the industry is frequent, and we usually call the bursting phenomenon in the production and manufacturing links such as processing, folding, packing and stacking of packaging, cartons, cartons, and crease lines as bursting lines. Many carton factories are also puzzled by the problem of bursting lines, which not only seriously affects the appearance, quality and delivery of cartons, but also causes the scrap rate to rise, so that enterprises suffer a lot of economic losses. So how can we improve it?In the first two issues, we introduced the causes and specific improvement methods of the crack of the bottom paper and the crack of the face paper. Help carton factories reduce costs and increase efficiency, let's take a look!
The occurrence of crank crack has a lot to do with the cardboard flat process, which is mainly affected by the following 4 factors:First, the drying area is too largeAs the temperature drops, in order to ensure that the cardboard glue is well bonded, the cardboard mill usually increases the drying area of each drying cylinder and hot plate in the production process of the cardboard line. When the steam pressure is not properly controlled, the cardboard tends to dry too much (moisture <7%). 
Improvement methods1.According to the vehicle speed, material and cardboard bonding, the drying area and the number of hot plates are reduced. 2.In view of the fact that the middle layer of the hot plate is not easy to heat, a group of steam heaters is installed at the inlet of the hot plate. 3.Modify the glue formula to reduce the glue gelatinization temperature below 55 degrees Celsius (increase the amount of flake alkali and reduce the amount of borax). 4.A water spray device is installed on the crimping wheel of the slitting machine to humidify the height line. Second, the indentation of the bottom paper is obviousThe pressure gap of the pressure wheel of the bottom paper of the single-tile machine is too small, and the pressure is too large, resulting in obvious indentation of the bottom paper. 
Improvement methods1.The clearance of the pressure wheel is adjusted according to the weight of the material (thickness), and the gap should be large when the weight is high, and small if it is not. 2.The pressure wheel pressure is adjusted according to the tension, the brake tension of the base paper holder is large, the pressure wheel pressure is large, and vice versa is small. 3. Improper crimping of the slitting machineWhen the slitting machine crimps the line, there are problems such as too small wheel clearance, deep indentation and crimping wheel linearity. 
Improvement methods1.When pressing the line, press the shallow line to avoid the line being too deep. 2.Change the upper wheel of the crimping wheel to 5 points and 5 lines (advantages: effectively avoid the autumn and winter shaking cover bursting line;Disadvantages: attenuation of carton compressive test value). Fourth, the material is not scientificDetect whether the physical indicators of the base paper are up to standard, folding resistance, burst resistance, ring pressure, etc., reasonable material matching is also very important, such as tile weight, ring compression strength and surface, bottom paper weight, breaking resistance, bending strength when there is a large difference, there will be a problem as shown in the table
Improvement methods1.Reduce the gram weight of the corrugated paper and increase the gram weight of the face paper or liner paper. 2.The difference between the gram weight of the surface and the bottom paper is as small as possible, and the flatness of the production line will be easier to control in production, and it will not cause line explosion. Conclusion:Dongjing Technology has been committed to providing advanced digital solutions for carton factories to help enterprises stand out in the fierce market competition. Through digital and intelligent management, we can better monitor the production process, improve production efficiency, reduce the scrap rate, and achieve the purpose of reducing costs and increasing efficiency. The content of this issue is shared here, the explosion-proof line needs to consider many factors, such as the material of the cardboard, whether the box height is small, whether there is preload, etc., if you have other methods or questions about the explosion-proof line, please leave a message in the comment area to share