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Binding defects are often the result of mismatched processes rather than isolated machine issues. Common problems include page detachment, spine cracking, poor opening angle, and uneven cover alignment. Page detachment is frequently caused by insufficient spine preparation or incorrect adhesive selection. Spine cracking often results from excessive glue rigidity or improper cover hinge design. Uneven casing-in alignment may occur when book blocks are not squared properly before cover attachment. This defect affects both appearance and durability. Most binding defects can be avoided through proper process sequencing and parameter control. Binding quality is not achieved by a single machine, but by the coordination of folding, sewing, gluing, and casing operations. Understanding defect causes at the process level allows printers to prevent recurring issues instead of repeatedly correcting symptoms. |
