1. Edges must be clear, with precise edge lines and slot positions.
Differing from manual packing, automated wooden box packaging equipment has higher requirements for the pressing and slotting of wooden boxes. During manual packing, defects such as shallow creases, misaligned pressing lines, and slotting can be manually corrected to ensure the natural shaping of the wooden box. Automated packing, on the other hand, relies primarily on suction nozzles,挡杆, and clamping bars for assembly and lacks the correction function for shaping. Therefore, it is crucial to ensure that the creases on wooden boxes are clear, allowing for easy bending during the folding process to avoid defects like broken threads or fish-scale patterns. Additionally, precision in slotting and pressing should be maintained, with deviations generally not exceeding 2mm. To facilitate the upright shaping of wooden boxes for automated packing, some foreign wooden box machinery manufacturers have recently introduced a process called pre-creasing. This involves installing a pre-creasing device on the automatic glueing machine to pre-fold a single and a triple pressing line on the wooden board. This reduces the resistance to the re-folding of the pressing lines, enabling the automated packaging line to more easily stand up the wooden boxes.
2. Box corner holes should not be excessively large.
There are typically two methods of sealing for automatic case packing: adhesive sealing and tape sealing. Unlike the manual "T" shape sealing method, neither adhesive sealing nor tape sealing seals the corners of the box. If the corner leaks are too large, it can weaken the waterproof and moisture-proof function of the wooden box. Particularly for exported goods, the vast majority are shipped to the delivery location in containers, and during the sea voyage, the air humidity inside the container may reach up to 93%. If the corner leaks are too large, the products inside are prone to moisture damage. Generally, for automatically sealed wooden boxes, the diameter of the corner leaks should not exceed 5mm.
3. The surface of wooden boxes should be suitable for sealing with transparent tape.
Some brand's wooden box boards, due to their high surface glue content, tend to make transparent tape difficult to adhere, leading to the tape easily peeling off during product packaging and sealing. Typically, for wooden box boards used as packaging materials, tape tests should be conducted. The specific method is to take a transparent tape with moderate adhesiveness, apply it to the wooden box board, and then pull it off to separate it from the board. If the top layer of the wooden box board is torn off along with the tape, it indicates that this type of box board is suitable for tape sealing. If it separates easily and the surface of the wooden box board is not damaged after peeling, it suggests that this type of box board is not suitable for tape sealing.
4. The wood surface must have a certain degree of roughness.
Some automatic Shanghai wooden box packaging machines are equipped with an automatic stacking system to stack completed wooden boxes. However, during this process, we found that wooden boxes with a high surface smoothness and heavy contents cannot be picked up. The reason is that the boxes with a highly smooth surface cannot generate enough friction with the wooden base to lift the boxes. Therefore, in this case, it might be advisable to consider using a rougher wooden surface as a substitute.
5. Flatness
Some beverage packaging, such as Pepsi, uses a method of heating and shrink-wrapping wooden boards. During the automatic case-packing line, the packaging process involves the nozzle picking up and folding a single board at a time to form a tray, followed by bottling and sealing with a heat-shrink film. If the boards have a degree of curvature, the nozzle may malfunction by picking up multiple boards at once. Therefore, we must ensure that the cut boards after die-cutting have a high degree of flatness.
Sometimes, after die-cutting, the wood panels exhibit high flatness, but they may warp after storage. The reason is that the storage environment has an excessively high or low relative humidity, causing a change in the moisture content within the wood, which leads to warping and deformation. For wood panels with particularly high flatness requirements, it is advisable to seal them with保鲜膜 during long-term storage to isolate them from external temperature and humidity changes, thereby avoiding the impact of these environmental factors.
6. The wood box must have sufficient flexural resistance at the pressing line position.
Some automatic wooden box packaging machines, to facilitate the insertion of contents into the wooden boxes, typically fold the lid outward 270 degrees during the boxing process. If the inner wood is not very flexible, it may cause cracks in the pressed areas. Therefore, many factories have a quality control item for the foldability of the wooden box's press line. The inspection method involves supporting the wooden box into shape, opening and closing the lid 270 degrees, and repeating this three times. The wood and inner wood must not have any cracks. Different products and different boxing machines have varying requirements for the design, craftsmanship, and precision of the wooden boxes. It is essential to understand the customer's actual boxing situation when designing wooden boxes to ensure that the boxes meet the customer's requirements without causing excessive quality.
