Folding carton design features
Folding cartons are generally made of folding-resistant cardboard with a thickness of 0.3-1.1 mm and can be transported and stored flat before being shipped. Both sides of the folding-resistant paperboard have enough long fibers to produce the necessary folding resistance and sufficient bending strength so that they will not crack along the indentation after folding.
The main varieties of folding paperboard are manila paperboard, white paperboard, boxboard, noodle board, kraft board, double-sided different-color cardboard, glass cardboard and coated cardboard. The rigidity of a folded carton made of a paperboard less than 0.3 mm in thickness does not meet the requirements, and a board thicker than 1.1 mm is difficult to obtain satisfactory indentation on the general folding carton processing equipment.
When designing the folding carton, it is possible to select a suitable thickness of cardboard depending on the carton volume and the weight of the contents. The main structure of the folding carton is mainly divided into several major categories such as tube type, disc type, tube type and non-tube type. In addition, the folding carton also includes a partial structure such as a box cover, a box bottom, a box surface, a box corner, etc., and has a lock, a self-locking, a partition, a window, a display board, and the like. However, folding cartons are often named according to a characteristic structure. The characteristic structure may be a main structure or a partial structure. For example, a self-locking bottom carton, a main structure is a tube type, and a characteristic structure is a partial structure, namely a self-locking box bottom. It has its name. Another example is a disc self-folding carton, which has two characteristic structures. One is that the partial structure is that the side walls of the box board can be folded flat automatically, and the other is that the main structure is a disc type.
Tube folding carton
Tube folding cartons are one of the main types of folding cartons. Its initial meaning refers to the box surface of the box cover of this kind of carton, which is the smallest area among many box surfaces, such as a toothpaste box and a film box. However, it is generally defined from the molding feature: It means that the box lid and the bottom of the box need to be folded and assembled to fix or seal the box during the carton forming process. Different tubular folding cartons are mainly subdivided by the different structures of the lid and the bottom of the box. There are many kinds of lid structure, such as the plug-in lid has a re-sealing effect, can be packaged household daily necessities, toys, pharmaceuticals, etc.; the lock-type structure is the lock of the main wing or the lock of the lock head is inserted into the lock of the opposite wing Inside the hole, the feature is that the seal is relatively strong, but the opening is a bit inconvenient, similar to the plug-lock type; continuous flap wing type is a special form of the lock, can be composed of a beautifully shaped pattern by folding, decorative pole Strong, can be used for gift packaging, the disadvantage is that manual assembly is more troublesome; Adhesive sealing lid is to bond the four flaps of the lid to each other. This kind of lid has better sealing performance, and it is suitable for high-speed full-automatic packaging machine, which is easy to open and has a wide range of applications. The positive-seal sealing structure is used to fold or curve the carton box body, using the strength and stiffness of the cardboard. , Underarm pressure wings to achieve sealing. Its characteristics are simple packaging operation, saving cardboard, and can design a lot of unique shape of the carton, but only limited to small and lightweight products; in addition to swing cover type and anti-illegal opening type and so on.
Similar to the lid, there are many types of bottom lids. However, if the structure of the bottom of the box is too complex, it will affect the efficiency of the automatic loader and packaging machine, and manual assembly will take time. Therefore, for the folding carton, the design principle of the bottom of the box is to ensure Strength, but also strive for simplicity. The common box bottoms are mainly socket-type, continuous-flame-sweep-type, lock-bottom-type, automatic-lock-type, partition-type, partition-type, adhesive-sealed-type, and front-back-type.