Automatic Packaging Requirements for Printing and Printing Corrugated Boxes

Crimping lines should be clear, precise and precise

Different from manual packing, automatic packing equipment has higher requirements for carton pressing lines and slotting. When manually packing, manual correction can be made to the adverse factors that affect the natural shaping of the carton, such as shallow indentation, and stress line slotting. The automatic packing mainly depends on the suction nozzle, the blocking rod and the clamping rod, and does not have the function of forming and correcting. Therefore, when the carton is processed, it is necessary to ensure that the carton has a clear indentation, and it is easy to bend when the carton is folded to form a shape, so that defects such as broken threads and crow's feet will not occur. In addition, the accuracy of slotting and pressing lines must be guaranteed. Generally, slotting or pressing lines must not exceed 2 mm.

In order to facilitate the automatic packing device to erect the carton upright, some foreign carton machinery manufacturers recently introduced a process called pre-crease. The pre-folding process is to install a pre-folding device on the automatic folder-gluer to pre-fold the first and third pressure lines of the cardboard once. This reduces the resistance to refolding the crimp line, making it easier for the automated packaging line to stand upright.

Box angle loopholes should not be too large

Usually, the automatic packing method includes glue sealing and tape sealing. Unlike the manual “work” type sealing method, neither the glue sealing nor the tape sealing will seal the corner of the box. If the box corner hole is too large, it will weaken the waterproof and moisture-proof function of the carton. In particular, some of the most exported goods are shipped from the container to the delivery place. During the sea voyage, the air humidity in the container may be as high as 93%. If the box corner is too large, it is easy to store goods. Damp. In general, for automatic carton sealing, the corner hole diameter should not exceed 5mm.

Carton surface should be suitable for transparent plastic sealing

Some brands of linerboard, due to the higher degree of surface sizing, can easily lead to the scotch tape is difficult to adhere to, so that when loading the goods sealing, the tape is easy to open, and thus can not be effectively sealed. Usually for the linerboard used for the paper, tape testing should be carried out. The specific method is: take a transparent adhesive tape with a moderate adhesiveness, and attach it to the linerboard. Then, tear the tape to separate it from the linerboard. If the cardboard is peeled off after tearing, it indicates that The linerboard is suitable for tape sealing. If it can be easily separated and the surface of the cardboard after tearing is not damaged, it means that the linerboard is not suitable for tape sealing.

Surface paper must have a certain roughness

Some automatic packing machines also include an automatic stacking system for stacking packed cartons, but in this process we found that some cartons whose surface smoothness is relatively high and whose contents are heavy cannot be sucked by suction cups. From. The reason is that a carton with a higher surface smoothness cannot generate enough friction with the suction cup to pick up the carton. So in this case we might consider choosing a rougher surface paper instead.

Must have good flatness

Some beverage packages, such as Pepsi, use a paper tray heat shrink film package, and its paper trays are die cut from the lower grammage B-triple cardboard. The auto-packing line packs a piece of cardboard each time through a suction nozzle and folds it into a tray, which is then bottled and heat-shrinkable. If there is a certain degree of bending in the cardboard, the suction nozzle may experience multiple failures at a time. For this reason we must ensure that the cardboard after die cutting has a high degree of flatness.