In the process of using the folding machine in the printing industry, its different folding methods and processes depend to a large extent on the different typesetting situations and design schemes of books and newspapers. Therefore, when the folding machine is folding In the whole process of the page, the folding method and the specific operation flow are also different. At present, the folding methods of book binding are roughly divided into the following three types: vertical cross folding, parallel folding, and mixed folding.
- Vertical cross fold
Vertical cross-folding is mainly used for folding pages of various books and periodicals. The folds of the first fold and the back fold are in a state of hanging over each other. For this kind of folding method, the pages must be turned at a right angle in the clockwise direction during operation, align the page numbers and folds, and then fold, fold several times in sequence, to complete the required number of folds and the width of the signature. Therefore, the vertical cross fold is also called the turning point.
- Parallel folding
In the parallel folding method, the folds of two adjacent folds are parallel to each other. It is mainly used in the folding of double copies in advertisements and books and periodicals printing. There are mainly three types of folding in parallel folding method.
(1) Double fold in half. That is, after folding in half in the order of page numbers, the second fold is still fold forward in half.
(2) Fan-shaped folding (also called bungee folding). That is, after folding the pages in the order of the page numbers, turn the pages of the book, and then fold them in half along the page numbers in the opposite direction, and fold the silkworms in turn to form a post.
(3) Baoxinzhe (also known as core fold or continuous fold). That is, according to the size of the book and periodicals, the page number is continuously folded forward, and the page number of the first fold is clamped in the middle of the book signature when the book is folded in two.
- Mixed fold
The hybrid folding method is a different combination of the multiple folding methods described above.
There are many ways to fold, but they all depend on the different layouts, that is, different layouts should use different folding methods. The layout of the layout is designed according to the binding form of books and periodicals and the design of the machine. For example, paperback and saddle-bound books, with inserts and without inserts, have different layout arrangements. When folding, it is necessary to use one of the folding methods for folding processing according to the specific situation of the layout.
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