Corrugated cardboard folding carton and tubular folding carton design features

Folding carton design features

Folding cartons are generally made of folding-resistant paperboard with a thickness of 0.3-1.1mm. They can be folded and stacked for transportation and storage 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, noodleboard, kraft paperboard, double-sided different-color paperboard, glass paperboard 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 a satisfactory indentation in a general folding carton processing apparatus.

When designing the folding carton, it is possible to select a suitable thickness of paperboard 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, and the characteristic structure may be a main structure or a partial structure, such as a self-locking bottom carton, a main body 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 a partial structure in which 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 function, can be packaged household daily necessities, toys, pharmaceuticals, etc.; lock-type structure is the main swing wing lock or lock group inserted into the opposite wing lock 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 lids 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 goods; 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.