Reasons and solutions for bending and warping of t

Technical cardboard carton warping causes and solutions

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core tip: Introduction: in the automatic packaging production line, if the carton warping exceeds 1cm, the carton will not be able to drive, which will cause jam and affect the production of the whole packaging line. Carton warping, through which aspects

introduction: in the automatic packaging production line, if the carton warping exceeds 1cm, the carton will not be able to drive, which will cause jam and affect the production of the whole packaging line. How many adjustments can be made to flatten the warped cartons and prevent customers from returning them

1. Reasons for bending and warping of cardboard boxes

the following is a fishbone diagram used to analyze the reasons for bending and warping of cardboard. Factors such as "man-machine method material ring" have been taken into account, and you can refer to it for reference

2. The cardboard boxes are bent and warped, which can be leveled through the following adjustments, and prevent customers from returning goods

(1) increase the moisture of the face paper through the spray device

(2) adjust the preheating area of the inner paper by adjusting the wrapping angle on the preheating cylinder to achieve moisture balance. Detect the moisture of the base paper on the machine, and adjust the preheating area according to the moisture difference of the base paper. The paper water inside is mainly used in automobile manufacturing, electronic and electrical appliances, household appliances, sports equipment and other fields requiring high strength, high modulus, low specific gravity, anti-static, abrasion resistance, etc. the difference is controlled within 2%, which can avoid the bending of the paperboard more than 1cm

(3) adjust the amount of paste on the inside paper on the premise of ensuring a good fit

(4) adjust the air suction of single-sided tile paper on the overpass (tension adjustment of single-sided paper)

(5) stack the warped cardboard in front and back in time. The temperature and moisture of the newly produced warped paperboard are high. The operation process of the experimental machine is the same. Some machines are the same, and they can be leveled by stacking them in time. For cartons with large warping degree, each bundle of 25 cartons shall be stacked in front and back, and heavy pressure shall be applied to correct the warping degree

(6) wrap the finished product with film to prevent uneven water absorption in the paper on the surface of the carton and bending deformation. Wrap the carton completely with a film, add a backing plate, and bind it with a packing belt. According to the standard, the cartons of each pallet need to be bundled, wrapped with film and pressed with backing plates

(7) it is also necessary to control the bending of cartons from the cardboard storage. Control the cardboard inventory time. When the air humidity is more than 80% in rainy season, the inventory cannot exceed 12 hours

(8) all shipping cartons need to be inspected by the quality assurance department and can be shipped only after they are qualified and signed

1 some large-scale and qualified water purifier manufacturing enterprises (9) strengthen the function of finished product quality assurance and the quality awareness of all employees