Adhesive package failure and elimination

The wireless glue binding process has many advantages such as the smoothness of its spine, the vertical and square shape of the back of the book, and the stable quality of the cover bag, good appearance quality, and the like, and is widely used in bookbinding.

Our factory is a specialized printing and printing factory in Fujian. In order to comply with the market requirements for the quality of books and magazines, the wireless glue binding process has received certain results. However, during use, some failures are often encountered, affecting the production efficiency and the quality of the package. If we use JBB50-B type rubber binding machine to book 60g offset book block, the appearance quality of the back of the book has been very unstable, the glue book has "eat glue" uneven, the back of the book appears wrinkled Phenomenon; there is a book back to produce "dovetail trough" shape, but also back washing, cutting groove inconsistent problems. The appearance of these faults appears to be uncomfortable with the thickness of the adhesive; the height of the backing plate is not proper and the spacing of the front and back clamps is not equal; the back milling of the book block is too much or the back milling cutter and the cutting slot cutter are blunt to deform the milling back. To this end, we have used methods such as adjusting the thickness of back-adhesives, spacing between front and rear plates, and heights. However, these problems have not been eliminated, and even the more disordered and distorted books have become, the more undecent the books are, and some books have actually deformed even more severely. So where is the root cause of the failure? After many careful observations and careful analysis, it was finally clear that the exact cause of failures such as book wrinkling, book block milling, back deformation, and cracking occurred on the milling back box. The machine's milling back box is equipped with a fixed plate and a movable guard plate. When the back of the book passes through the "two plates," it can prevent the book blocks from being deformed during milling, backing, and cutting, ensuring that the milling back and cutting grooves are even and stable. . However, due to the milling back, the book block has a certain frictional resistance to the inner side of the "two plates". After a period of use, the inner surfaces of the two plywoods are severely worn and can not support the book block to prevent book back milling deformation. After analyzing the situation, we opened the movable plate on the milled-back box and found that the parts of the inner side of the movable plate and the fixed plate corresponding to the milling-backed blade edge appeared a small, deep arc-shaped concave wear. In this regard, by repairing and repairing the wear parts on the inner side of the "two plates," the above-mentioned package failures will be immediately eliminated. The books after the package will be squarely arranged and the book pages will never be shorn or milled. Quality is better guaranteed.

Through the observation, analysis and elimination of bad failures of the package, the author has great enlightenment. Only by preventing the wear and tear of the components of the equipment, the glue-binding failure can be avoided well. So, how to minimize and reduce equipment wear and tear? In addition to doing a good job in equipment maintenance, reasonable operations and strict process regulations are also very important. The milling back should be based on the principle of “folding inwards” which can mill the book block, minimizing the amount of milling back so as to reduce the working resistance of the milling back knife and the cutting knife, thereby reducing the lower part of the book block against the inside of the fixing plate and the movable guard plate The frictional force prevents the "two plates" from wearing sideways into depressions. In addition, the "two-plate" spacing should be adjusted so that when the book block passes between the fixed plate and the movable guard plate, there is a slight sense of slight resistance. When the milling cutter blade is working, it will not be adjusted due to the "two-plate" spacing. Too large, so that the occurrence of chattering friction back and forth of the book block core caused by the knife blade corresponding to the "two plates" inside the wear, which is to ensure the quality of milling back, to prevent the book back milling deformation, to promote the stability of the quality of the operation essentials. It is an important measure to minimize the abrasion of the "two-plate" clips, the back adhesive, and the amount of back-to-back milling. Minimizing the amount of milling back, it is also conducive to maintaining the sharpness of the milling back knife and slotting knife, preventing the deformation of the milling back, and stabilizing the quality of the package. It can be seen that how important it is to ensure the quality of wireless glue-binding by proper operation and reasonable technology!