At present, many small and medium-sized bookbinding companies are limited by space and funds, and have not yet used glue-binding binding production lines. They still use single-machine operation. For example, it is convenient to exchange products, easy to maintain, and has a small footprint. In the production process, it often encounters some quality problems, such as degumming, slanted cover, back centering, unclear corners of the back of the book, empty back of the book, etc., which directly affects the firmness and appearance quality of the book. 1. Bars (1) The position of the solid support board is too high, the pressure is too high, and the second drop board can be raised. (2) The clamping force of the copper plate is too large and should be reduced appropriately. 2. Uneven thickness of book back (1) The first upper rubber wheel is too high, and too much glue penetrates into the pages of the book, which can lower the position of the first upper rubber wheel. (2) The back of the book is not milled, and there is paper residue. First check whether the back milling cutter is sharp, and then check whether the left side of the milling cutter disc is lower than 0.05mm on the right side. (4) The distance between the milling cutter and the bottom plane of the book holder is too large, and it should be adjusted to 0.7-0.9mm. 3. There is a gap between the cover and the adhesive layer on the back of the book (1) If the glue is uneven or the amount of glue is too small, check the gap between the glue wheel and the scraper. (2) The uneven glue is uneven or the glue on the glue stick is not scraped. Check whether the height of the inside and outside of the glue stick is consistent; check the contact between the glue board and the glue stick. (3) The coaxiality of the uniform glue stick does not meet the requirements and should be adjusted in time. (4) The temperature of the glue stick and the glue liquid are low. Check the heating tube and increase the glue temperature. 4. The size of the back of the book is inconsistent The two M12 hex screws connecting the solid support frame and the slide bar are loose, resulting in the copper clamping plate and the book clamping plate on the large disc being not parallel. The universal coupling that connects the supporting platform and the machine can be disassembled, and the meshing time of the bevel gear can be adjusted. Note that it should be marked before disassembly. In addition, the position of the Toshi platform can also be readjusted. 5. The back of the book is rounded The position of the book in the book holder is too high, which causes the position of the solid support plate in the solid support mechanism to be too low, and the support strength is too small. The position of the support plate in the second book drop mechanism should be reduced. 6. The back of the book is wrinkled (1) The position of the book in the book clip is high, and the position of the second drop plate should be lowered. (2) The clamping force of the copper clamping plate is too large and should be appropriately reduced. (3) The glue temperature is low and the fluidity is poor. The temperature limit value of the thermostat should be adjusted to increase the glue temperature. 7. The back of the book is cracked or squeezed (1) Too high sturdy board causes too much sturdy strength, which can increase the position of the sturdy board in the second book drop mechanism. (2) There is too much glue on the first glue wheel, the gap between the first glue wheel and the scraper should be adjusted to be small. (3) The position of the first upper rubber wheel is high, and the pressure on the back of the book is too great. The position of the first upper rubber wheel can be adjusted. 8. The book block and book back are rough against the outer edge of the book board (1) The position of the milling cutter head is low, and the position of the milling cutter head should be increased. (2) The cutter is too blunt, sharpen or replace the cutter. 9. The back of the book is split or flanged (1) The cutter is too blunt and should be sharp. (2) The distance between the milling cutter and the bottom surface of the book clip is too large. The position of the milling cutter should be increased. (3) The gap of the copper clamping plate is too small, it should be adjusted to the book thickness minus 2mm, and the thick book can be moderately relaxed. (4) The opening of the side rubber wheel is too small, the distance between the two rollers should be 2 ~ 3mm smaller than the book block. 10. The cover is skewed, the back words are not centered (1) The specifications of the cover opening are not allowed, and the standard operation should be followed. (2) Improper adjustment of the upper cover mechanism, the distance between the two indentation wheels can be adjusted to be consistent with the thickness of the book block, and the line of the upper and lower indentation wheels can be aligned to prevent damage to the cover; adjust the rear stop gauge to make the cover and Front gauge contact; adjust the distance between the left and right baffles so that the center of the cover is in the center of the indentation wheel inside and outside. (3) Adjust the supporting mechanism and send the glued book block to a position that has not completely contacted the cover; adjust the left and right stop bars to align the book block with the two indentation lines of the cover. (4) Adjust the knurled screws on the left and right sides of the cover conveyor to ensure that the pressure of the two sets of rollers and the rubber wheel are consistent, and the cover conveying speed is the same; use the push rod to push the cover to the front block gauge of the supporting platform, and the rear block gauge guarantees the cover The left and right are consistent, and the indentation line is consistent with the position of the package. 11. The corners of the back of the book are not clear (1) Adjust the position of the indentation wheel so that the indentation line is located on the straight line where the back of the book intersects the front and back cover binding parts; ensure that the indentation round knife is sharp and adjust its height to make the indentation line clear. (2) Adjust the clamping force of the copper splint to prevent the cover from wrinkling. (3) If the bottom plate is adjusted too high or too low, the back cover and "steel wire" will appear, or the cover and the back of the book will not fit properly. (4) Ensure that the back milling cutter is sharp, and there should be no residual paper scraps on the reverse side of the stitching.
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(3) The side glue layer is too thick, the baffle should be adjusted to control the amount of glue on the glue wheel. 
