Study on Plate Loading Technology of Flat Paste Box II

(B) lock-bottom loading technology - representative technology of flat pasting boxes

For the case of the straight folding carton, the bottom of the carton is inserted into the bottom plate and cannot be overloaded. Therefore, the process of adding an adhesive box to the bottom of the carton is naturally introduced so that the bottom of the formed carton forms a solid and stable automatic. Locking structure. The flaps with the bottom of the box folded and glued on the box are collected in the folding box board. When the box is opened, the bottom of the box is automatically formed and cannot be opened at will. When the box is folded inwards, the box can be restored to a flat shape. And the lid part can still be freely opened and locked. This is the lock bottom loading plate.

Bottom loading plate can be divided into two types: conventional box lock bottom and special box lock bottom. Because of their large differences in the angles of rotation, forming angles, and the conditions of the folder-gluer, etc., due to limited space, only the conventional box-bottom-plate-mounting technology is discussed here. Take the right-angled hexahedron box as an example. The general steps are as follows: :
(1) The one-three pre-folding stage is basically the same as the straight-loaded version.

(2) When entering the bottom belt section of the lock, according to the direction and size of the cassette at the bottom of the lock box, install different directions, different sizes, and different numbers of lock bottom accessories. At the end of the lock accessories are generally pull hooks, lock bottom oblique panels, pressure rods, support rods, rubber elastic sheeting and so on. This process is carried out until the backsheet folded with glue is fed safely into the second and fourth wire belt sections.

(3) When entering the second-and fourth-wire belt section, the process differs from that of the straight-line folding cartons in that the quadruple materials have the bottom flaps that are folded (two of which are already glued), except for the use of two or four wires. The belt is fixed between two or three of the folded backsheets, but also to install accessories to control a four or two-up easily rebounded film, through the belt folded and the insert accessories to complete the lock bottom plane folding cartons Basic molding.

Third, the delivery of technology - the end of the plane paste box version of the tail

The paper-stencil version of the flat-glued box refers to the process of stacking and finalizing the number of basic molded box materials one by one. The paper-slotter in the flat-gluer usually consists of a paper-feeding belt, a paper-receiving belt, an optical reading eye, a kicking device, and abnormal sensors. The quality of paper delivery technology is related to the speed of receipt and the quality of the gluing box, which is a reliable guarantee for the normal, high-speed operation of the flat gluing machine. It is one of the main technologies of the plane-gluer-box machine version.

1, conventional material delivery technology:

(1) The size of the box material directly leads to different ways of delivery

a. The larger box type generally adopts the paper receiving method. This method mainly focuses on adjusting the distance between the two paper feeding belts and the kicking device. When the proportion is appropriate, it can not only guarantee the integrity of the box material, but also ensure the stability of the kick distance when kicking the paper. It can also ensure the stability of the delivery, and no scratches on the material surface. In addition, it is also necessary to focus on adjusting the speed and pressure of the take-up belt. In view of the large amount of paper that may be caused by the increase in the thickness of the folded paper, measures such as accelerating the speed of the take-up belt or reducing the paper collection pressure are generally adopted. Although this can be reduced, Scuffing, reducing indentation, but easy to glue adhesion is not strong, so the adjustment should be cautious, to ensure not only to ensure no scratches and less indentation, but also to ensure a firm bond. b. The medium box type generally uses the flat delivery method. This method can make the box material basically no longer come into contact with the feeding belt after entering the delivery belt, so as to ensure the avoidance of scratches and increase the pressure of the delivery belt so as to ensure firm bonding. c. The smaller box type generally adopts the paper receiving method, and the flat type paper collecting method can also be adopted. Need to focus on is to slow the speed of the take-up belt to increase the thickness of the delivery, so as to ensure a firm bond, for the small box type, it is a single belt delivery method.

(2) The process before the gluing process indirectly influences the different delivery methods

Even if the box is of the same size, due to the difference in the selection of the paper and the selection of the silk of the paper, various abnormalities such as the permeability of the paper, the flexibility and the thickness, etc., are caused in the printing, coating and pressing. Whether the ink caused by processes such as light, laminating, die-cutting, etc. is easy to decolorize, whether the material surface is prone to indentation, easy to scratch, whether it is easy to generate risers and burst wires at the dimly-lined position, and it may also cause problems in receiving paper. All kinds of subtle differences, generally by adjusting the delivery speed and feed angle to complete the non-decolorization, non-explosive, no scratches, no indentation, adhesive and other best paste box effect.

(3) Suitability and stiffness of the box are also important factors affecting the delivery

The stiffness of the box is generally directly related to the thickness and pliability of the folded paperboard, and it is indirectly related to the different processes in the various processes before the gluing. The process of the gluing box and the suitability of the box are directly related. In general, the paper thickness varies depending on the size of the box type, and the box material adaptability depends on the board thickness and the post-pressing process. Therefore, the thickness, stiffness, and adaptability of the fold-resistant paper board are difficult to grasp in the delivery technology. In part, it generally depends on factors such as the pasting process and the length of time for the glue to adjust the delivery part.

2, Shaped box delivery technology.

(1) The material with windows should generally be as low as possible with the window facing downward, and not as far down as possible. The pressure surface of the paper feeding belt should be lower than the belt under the paper feeding as far as possible, leaving a loose angle for paper feeding and sending at the same time. The point of pressurization of the paper belt should be as far as possible across the window, so as to extend the forward drop of the falling position of the feed material surface as much as possible, so that the paper feeding can be carried out smoothly and continuously, and the paper receiving abnormality will not be caused due to the obstruction of the window; Excessive material, because of worry about the stiffness of the box material, or almost impossible to form a windowless paper-receiving surface, can also adopt the paper-recovery technology, which is more difficult than the delivery paper.

(2) For the case where the difference in the length of one or four box packs is too large, a combination of spot-and-face delivery methods may be adopted, so as to achieve the docking of the material side after the longer joint delivery, and to achieve a shorter connection. The paper feed point is guaranteed to fall on the short feed surface, so as to ensure normal paper delivery.

(3) For the oblique material caused by the non-parallel of the second and fourth wires, on the one hand, the two ends of the bottom of the box can be corrected to be close to normal by two feeding belts. On the other hand, the paper can also be adjusted by the delivery belt. The level of the angle to complete the normal receipt. (to be continued)