Hardcover binding process

First, the quality standard requirements for the finishing process

The hardcover binding includes three sequences, ie, book block processing, book lining, and nesting.

1. Hardcover book block processing quality standards

(1) Flattening

1 According to the actual thickness of the pressed book block (one or several books), the pressure rule is set and the pressure test is performed without errors.

2 The book block should collide neatly when it is flattened. There must be no missing posts, skewed tips, and flattening.

3 After the flattening, the thickness of the book blocks is basically the same and they must be stacked neatly. The four corners do not overflow and ensure that the book block is not deformed.

(2) First Coated book adhesive

1 Use the correct type of glue, apply a thin and even, not spill or spend.

2 For the first time, the rubber should be provided with softness and firmness, so that it will not spread after the ridge is rounded. (3) Rounding

1 Hand-rounding is correct and the machine is properly adjusted.

The roundness of the circle is calculated by the thickness of the book block. The central angle of the arc is between 90 and 130 degrees.

3 After the round book block, the round corners are uniform, small and skewed, or one end is big and small, ensuring that the cut edges are perpendicular to the top and bottom corners.

4 There is no crack or wrinkle after the book block has been rounded, and it will not return to the circle.

(4) Rising

1 The positioning of the book block clamp is correct, the four corners are flat and not skewed, and the exposed part of the sill of the book block is parallel to the top and bottom.

2 Manual ridges are applied properly, without cracks, wrinkles, and the back of the book is firm and firm, and it is correct to maintain the circumstance.

3 The ridges are of the same height, the thickness of the cardboard is 2.5mm, and the ridge height is 3mm, and the above is 4mm. The angle between the convex part of the spine and the paper is 120 degrees ± 10 degrees (the slope of the ridge and the surface).

(5) Adhesive tape and plug cloth

1 Adhesive used properly, spread evenly without spilling the incision.

2 Bookmark with length: 20±10mm longer than the diagonal of the book block. Bookmarks bandwidth: 32 open and

The next book is 3-4mm, and books with 16 open and above are 5-7mm.

3 sticking position: Located at the top of the back of the book in the book block, 10mm, sticky and sticky.

4 Cloth length: Book back width (square back) or book back arc length 1mm.

5 sticking plug wire ribs exposed on the back of the book at both ends of the incision, sticky is not skewed, sticking does not open, sticky and no wrinkle.

(6) Sticky paper backing paper