With the further development of science and technology, China's printing technology has been comprehensively improved, pre-press, printing, and post-press technology are moving toward higher, faster, and more refined direction, especially the development that has lagging behind for many years Binding technology has also developed rapidly. More and more enterprises have introduced advanced equipment, which has provided a more reliable guarantee for the production cycle and quality of books and periodicals, and injected vitality into the development of post-press binding technology. Now I would like to talk about some of the product quality problems that are prone to occur in various processes, for reference only by industry peers.
Common quality problems
1. Missing posts (missing posts)
1. The stacking of the signatures is too high, the stacking height of the signatures should be appropriately reduced,
2. The front and rear block gauges of the book stack are tightly clamped, and the gap should be adjusted appropriately.
3. The suction volume of the suction nozzle is too small, the suction power should be increased.
4. The nozzle is worn and should be replaced.
5. The nozzle rod and air valve are blocked and should be cleaned regularly.
6. The opening and closing time of the teeth does not match the swing position of the suction nozzle, the time of the twig should be adjusted, and the hem position of the suction nozzle should be matched with the opening and closing time of the teeth.
7. Regularly check the missing post detection device to ensure its sensitivity.
2. Multiple posts (repost)
1. The pegs are loose, and the signatures are not fully supported, and should be adjusted to the appropriate position to support the signatures.
2. The suction nozzle is low and the swing amplitude is too small. The height of the suction nozzle and the swing amplitude should be adjusted.
3. Stacked signatures collide unevenly, the signatures should be knocked apart, and the multi-post detection device should be checked regularly. Guarantee its reliability.
4. Improper adjustment of the mechanism of automatic rejection of multiple posts and fewer posts, and the rejection of waste books is not timely. The corresponding cam industrial position should be selected according to the length direction of the posts in the book, to prevent the books with multiple posts and fewer posts from being mixed into the finished book.
Three. Wrong posts
When adding posts, the operator should carefully check the layout and page numbers of the signatures to prevent mistakes. At the same time, the stacking of semi-finished products should be standardized. A spot check system for spot checks every three or ten spots should be implemented. , Found the wrong post in time.
4. Random posts (reverse posts)
1. Improper adjustment of the collection chain, the sticks on the collection chain should be aligned with the book.
2. Nagging teeth are tight, fast and slow when putting posts, and should be adjusted to make the posting speed basically the same.
3. The angle of the book stopper is inappropriate, and the angle of the book stopper should be adjusted.
4. The signature is wrinkled and uneven, and the signature is not in place. The uneven signature should be removed.
5. Damaged signatures
1. The paper is thin and poor, and the suction power of the suction nozzle is too large, which will break the pages.
2. Nagging teeth are tight, breaking the signature.
3. The stack of book signatures is too high. When the next signature is sucked away, the page of the previous signature is dragged down and torn.
4. The automatic control system is not working properly, and the signatures are damaged when they are disordered.
5. The tension of the two teeth is inconsistent, tearing the pages of the book.
The above phenomena should be resolved symptomatically. Follow-up on the quality problems and countermeasures of binding.
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