4 The effect of the working line on the structure of the carton
Since the production line is the main box type element, it has an important influence on the structure of the carton. Once the design of the line is completed, the scale design of the box and the internal structure is determined.
In Fig. 9a, the line is designed as B and D lines, and it must be determined that the wall must be tilted in the C direction when the wall plate is restored from the single crystal to the flat plate. Therefore, the direction of the joint between the box-type partition wall and the box body is the same.
In Fig. 9b, the working line is designed as A and C lines. When it is determined that the partition plate is restored to the original flat plate shape, the partition plate on the front plate extension plate must be poured in the D direction, and the intermediate plate of the intermediate partition extension plate must be poured in the S direction. . Therefore, the box joint direction is opposite to the box joint direction.
In Fig. 9c, the lines are designed as A and C lines because the partition plates are all on the extension plate of the middle partition plate. Therefore, when the partition plate is restored to the flat plate shape, the partition plate bonded to the rear plate must be poured in the S direction. The partition wall bonded to the front plate must be poured in the T direction. Therefore, the box-type panel joints are one set in the direction opposite to the box joints, and one group is the same.
Figure 10 is based on the design of Figure 9a, line B, D unchanged, while the same wall by (where j=3). As can be seen from the above design, the same panel and its joints are exactly designed in the middle area of ​​the two lines. In other words, when the design of the line is completed, the direction of the partition wall is actually decided. In FIGS. 9a and 10, the direction of the partition wall is directed to the joint of the box body; in FIG. 9b, the direction of the partition wall is directed to the opposite direction of the joint of the box body; in FIG. 9c, the direction is reversed.
5 Conclusion
(1) The production line plays an important role in the carton forming process, because the production line can also ensure that the carton can be folded into a flat shape after it is formed. After the carton is automatically packaged and produced, as long as the sheet box mechanism opens the box body, The carton box is automatically shaped, so the line design is an important design element in the folding carton structure.
(2) If the tubular folding carton line cannot be designed using a forming line, one or several pure indentation lines must be designed according to the box structure.
(3) Other types of box-type structures can be designed to work at the bottom of the box.
(4) The line will affect the structural design of the relevant part of the carton.
(Author: Sun Xia Cheng Duan Tianjin University of Science and Technology)