The specific cutting method of common materials for hardcover books

The specific cutting method of common materials for hardcover books

The specific cutting method of several common materials for hardcover books

(1) Cutting of ring lining. If the base paper has a significant thread direction, the thread direction of the split ring lining should be parallel to the narrow side of the book, such as the ring lining of a 16-open hardcover book, 8 pieces of 787mm1092mm paper can be opened, but if The base paper is silk thread paper, and only 4 pieces can be drawn. Of course, other sizes of base paper can also be used to improve the utilization rate of the paper.

(2) Cutting of fabrics. First, determine the size of the fabric used in 1 book. The reference formula is as follows.

The height of the fabric (longitudinal) = the height of the size of the folio plus 3mm (flare) plus 2mm (cardboard thickness) plus 13mm (fabric edging) 2

Width of fabric (horizontal) = book thickness (for round back, book thickness 1.15) plus 2mm (cardboard thickness) 2 plus open size width plus 6mm (book slot) plus 3mm (flare) plus 2mm (cardboard thickness) plus 13mm (fabric hemming)2

Assuming that the size of the folio is 260mm186mm, the thickness of the book is 30mm, and the back is round, according to the above formula, the amount of fabric for one book can be calculated.

Fabric height=260 plus (3 plus 2 plus 13)2=296(mm)

Fabric width=301.15 plus 4 plus (186 plus 6 plus 3 plus 2 plus 13)2=459(mm)

Therefore, the size of a hardcover book is 296mm459mm

Assuming that the width of the fabric provided by the customer is 1000mm and the length of each roll is 100m, the best cutting method is to first cut the roll material into a flat sheet of 1000mm900mm, and one sheet can produce 6 copies, and each roll can produce 6 copies. 100/0.9=666 (this).

It should be pointed out that for some detailed situations, detailed analysis and arrangement are required.

①If the utilization rate of the fabric used is low, consider replacing the fabric with other specifications.

②If there are some wrinkles in the whole roll of fabric, the size of this part should be deducted from the total size.

③If there are joints in the whole roll of fabric, the cost should be reduced according to the actual situation.

④If the fabric is of different thickness, uneven coating, blooming at the bottom, etc., the size should be reduced or the material should be changed.

⑤ If there is a problem with hot stamping of fabrics, you should negotiate to change the material, or increase the number of hot stamping times and the size of the hot stamping foil.

(3) Cutting of small materials such as plug cloth.

① Plug cloth = book thickness 1.2 shrinkage rate compensation 2 (upper and lower sides)

②The length of the ribbon = the diagonal length of the folio plus 20mm

The actual amount of hardcover book materials should also be given a reasonable amount according to the number of processing procedures and output to meet the needs of processing losses. At a minimum, it should be reimbursed at the actual cost, or replaced with a new one.

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