Inaccurate corrugated carton size The design and manufacture of corrugated cartons depended on size, size was wrong, and the corrugated cartons produced became waste products. Corrugated carton size is divided into inner diameter size, outer diameter size and processing size. Customers generally have strict requirements for the inner size of corrugated carton. The inner diameter of the carton must ensure that the contents can be installed, generally equal to the maximum outer diameter of the contents plus the parameter 3-7mm.
The outer diameter size is the size used in the circulation. For the export corrugated box, the outer diameter size is very strict, otherwise it will affect the container shipment due to the size. This requires that during the production process, the size of the board of the production line and the size of the printing slot line should be strictly controlled, and at the same time, the size control of the nail box and the adhesive box should be grasped.
Layout Printing Errors Corrugated carton layouts are mostly printed using text, which is extremely prone to errors. Once the design layout has not been corrected, the consequences will be disastrous. Therefore, proofreading must be carried out one by one during proofreading, and strict checks must be made. Otherwise, the entire batch of corrugated cartons will be scrapped due to minor mistakes. All production companies must pay attention to the proofreading of corrugated carton pages and must not relax.
Layout printing is vague, dirty, missing white layout printing is fuzzy, dirty, leaking phenomenon is relatively common, directly affect the appearance of corrugated boxes, customers are very picky about this. Layout blurring is mainly caused by excessive printing pressure. There are mainly printed traces on the dirty surface of the layout. This requires the control of the printing process, the technical training of the printing operators, the improvement of the equipment's ability to control, and the cause of the defects. Analysis can find the answer in a timely manner and correct and correct it.
Indentation of the paperboard die is too shallow. When the flap is folded and the single line is folded or folded, the horizontal indentation line is not straight. The paperboard has a deep indentation in the longitudinal direction and cracks occur in the paper.
Cardboard indentation is one of the necessary processes for corrugated cardboard box processing. The quality of indentation plays an important role in cardboard folding or box use. The depth of indentation and position accuracy are different. Caused a deviation in carton size.
Cardboard transverse indentation is typically achieved in cardboard production lines using double-flanged indentations. Longitudinal indentations are typically done on a printing slot machine using a single flange indentation. The principle of indentation is to adjust the pressure of the indentation to achieve easy folding and marked marks, but the paper inside is not broken as a standard. For horizontal indentation, the center position of the upper and lower wheels should be aligned, and the indentation should be pressed through, that is, there is no gap. Generally, the thickness of the five-layer cardboard indentation is about 2mm. For the longitudinal indentation, the gap between the upper and lower wheels of the trace should not be adjusted too small, and at the same time, the water content of the cardboard should not be too low to prevent the paperboard from cracking during processing.
Folding of cardboard flaps is one of the important indicators of corrugated board quality. In use, customer requirements are very strict. They require the flaps to be folded 180 degrees outwards and outwards. There must be no cracks in the outside of the paper. This requires control of the quality of the raw materials. Try to avoid the use of rough, low-grade corrugated paper stocks. The base paper may burst the face paper when the flap is folded.
Too dry paper and paperboard is also an important reason for the breakage of the broken flaps. During the production process, the moisture content of paper and paperboard must be controlled.
The indentation of the flap crease line must be controlled so that the indentation is moderate. If the flap is found to be broken during production, the benefit of the inner paper roll will be sprayed immediately after the cardboard is removed from the machine, and the flap will be removed to the both sides in the end or in the end. Greatly improve the folding cover's folding resistance.
Cardboard blister To solve cardboard blister To control and bond the adhesive well, in order to achieve the best adhesive effect.
Adhesive quality is the basic factor affecting the bonding of the paperboard. The concentration of various ingredients, technical indicators, formulation ratio and oxidation, gelatinization time and temperature must be strictly controlled during the formulation process. Every time the adhesive is prepared, it must be tested to stabilize the quality of the adhesive.
Effectively improve the quality of good raw materials, especially the tightness and moisture content of the base paper, strengthen the technical training of operators, improve the use of equipment and maintenance levels, according to the drying speed, paper, drying lane temperature is flexible Adjust the amount of glue and equipment operation to the best state, try to eliminate all kinds of unfavorable factors, to achieve correct analysis and reasonable adjustment, bubble gum problems can be solved.
The low strength of cardboard raw materials is the main reason for the softness of cardboard. The quality of the corrugated base paper directly affects the compressive strength of the corrugated carton. Selecting a high-strength corrugated base paper can produce a strong and flexible corrugated carton. In addition, the inverting tiles of the cardboard will also cause the cardboard to be soft, and the emphasis should be placed on the adjustment of the printing pressure in the production line process and the printing process.
The cardboard box is soft, and the moisture content of the raw materials and the excessive amount of glue are important reasons. Due to the large amount of glue applied, the moisture in the glue penetrates into the corrugated medium and causes the corrugated sheet to become soft. After entering the supply flat plate, the moisture in the paper board is not sufficiently distributed to make the cardboard soft.
Printing colors are not uniform. Corrugated paperboards Paper color is not uniform. Color samples are produced in different batches, or do not meet the customer's requirements. In this case, they will generally be returned. This requires that, while strictly controlling the hue of the ink, the best method is to archive the print color samples when printing the first batch of products so that the same product can be checked for later printing.
Due to the different face paper manufacturers of corrugated cartons, there are differences in the color of the face paper. Even if the linerboard of the same manufacturer is different, there are color differences in different batches. This requires strict control when the raw materials are inspected in the factory. Archiving of the samples should be done at the same time. At the same time, the cardboard box of the same manufacturer must be unified. During production, the same corrugated box requires the same cardboard to keep the color of the face paper uniform.
