Introduce the quality standard requirements for the hardcover finishing process
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The quality standard requirements and operating procedures of the hardcover binding process refer to the quality standard requirements and operating procedures of various modeling processing and equipment used on the book block after the book is locked. It includes flattening bundles, sticking agents, drying splits, cutting books, rounding, ridges, three sticks, shell making, hot stamping, and lining sweeping. It is divided into three major processes.
Hardcover binding process quality standard requirements
The hardcover binding consists of three upper sequences, namely book block processing, book lining processing and nesting processing.
1. Hardcover book core processing quality standard requirements
(1) Flatten
1 Adjust the pressure gauge according to the actual thickness of the book block (one or several).
2 When the flattening, the book block should be neatly collided, and there should be no shrinkage, skewed, and flattened.
3 The thickness of the book block after flattening is basically the same and should be piled neatly, the four corners do not overflow, and the book block is not deformed.
(2) The first time to apply the book adhesive
1 Use the correct type of glue, apply thin and even, no spills and no flowers.
2 The first time to apply glue to ensure the softness and firmness of the round, so that the rounded ridge does not scatter.
(3) Round
1 The hand is round and round, and the machine is round and properly adjusted.
2 The circle of rounds is calculated by the thickness of the book block, and the central angle of the arc is between 90 degrees and 130 degrees.
3 After rounds, the book block has a uniform circular shape, a small skew or a small end at one end, ensuring that the upper and lower corners of the slit are perpendicular.
4 The book core is round without cracks and wrinkles, and it is firm and flat without rounding.
(4) ridge
1 The book block is clamped and positioned correctly, the four corners are not flat and the upper part of the book block ridge is parallel and parallel.
2 Hand-made ridges are used properly, without cracks and wrinkles, and the back of the book is firm and firm, keeping the correctness of the circle.
3 ridge height is consistent, the thickness of the cardboard is 2.5mm, the height of the ridge is 3mm, and the above is 4mm. The angle between the convex portion of the spine and the writing is 120 degrees ± 10 degrees (the inclination of the ridge and the face).
(5) Sticky tape and plug cloth
1 The adhesive used is appropriate and evenly applied without overflowing the incision.
2 bookmark length: 20 ± 10mm longer than the diagonal of the book block. Bookmark bandwidth: 3-4mm for books with 32 open and below, and 5-7mm for books with 16 open and above.
3 sticky position: 10mm at the top of the book back in the book block, sticky and strong.
4 plug cloth length: book back width (square back) or book back arc long 1mm.
5 plug wiring ribs are exposed on the incisions at both ends of the book back, the sticking is not skewed, the sticking is not open, and the sticking is flat and wrinkle-free.
(6) Sticky book back paper
1Adhesive is selected properly, evenly applied, no spillage or no flowering.
2 book back paper length: 4mm shorter than the book block. Book back paper width: the same book back width (square back) book back arc length is 1-2mm more than it.
3 The width of the back paper of the book is uniform and uniform, not skewed, flat and wrinkle-free, and the length is uniform.
(7) Sticky paper
1 Adhesive is appropriate, uniform application, no spillage.
2 The length of the paper: 3 to 4 mm longer than the book block. Package paper width: for the two book back arc length plus 5mm stick.
3 package paper materials are selected correctly. The sticking is not skewed, it sticks and does not fall off, and it sticks flat without wrinkles.