Folding machine features

Among the book printing companies in China, the folding machines currently used mainly include knife-type, fence-type and grid knife-type folding machines. Due to their different structures and technical performance, the range of use is not the same. * The knife-type folding machine has a high folding accuracy. The fact that the signature of the booklet is folded and pressed makes the requirements for the quality of the paper wider. It is also possible for the thin, soft paper to fold. The machine is easy to operate. When the folding method and specifications are changed, the time required to align the machine is less. However, due to the kinematic inertia of the knives, the folding speed is low and the structure is complicated. Knife folding machines are available in both full and split styles. They are suitable for folding large format sheets. The 40-100g/m2 full sheet or facing sheet can be folded into two signatures of various specifications. It can also use a flower wheel knife to punch the signature between the third and fourth folding knifes. Adapt to the needs of wireless glue binding. It can be used by printing houses to fold hardcover, paperback books and various publications in single and double books. * Barrier folding machine has a small body, small footprint, multiple folding modes, fast folding speed, high production efficiency, convenient operation and simple maintenance. However, the grid folding machine can fold the web to the largest extent and is sensitive to the thickness, hardness and smoothness of the paper. When the paper with a relatively dense and hard surface is folded, the accuracy of the folding is reduced due to the difference in the deformation characteristics when a crease is formed in the folding fence. When the paper with high smoothness is folded, the degree of compaction of the creases is reduced because the friction coefficient of the paper is small. When the folds are formed between the folding rollers and the creases are pressed, some of the pages in the signature will be squeezed out. Some of the pages outside the signature form wedges at the creases. It is suitable for folding below, 80-120g/m2 newsprint, glossy paper, letterpress paper, offset paper, coated paper. From the paper feeding to the paper receiving, the whole work process is carried out automatically. It can be continuously variable, and can be continuously folded into 40% off all kinds of different folds. In order to fold four page numbers of publications or linings, covers, sleeves, and fractional jobs, it is most appropriate to use a small-sized, fence-type folding machine regardless of the batch size. Barrier small-format folder can also be used to fold calendars and small-format prints. * The bar-knife hybrid folding machine replaces the advantages of knife-type and fence-type folding machines to a certain degree. The folding format is large, and there is no special requirement for the compactness of the paper. Compared with the knife folding machine. , greatly improving the production efficiency. At present, the folding machines produced abroad generally use a hybrid knife-type structure. The folding knife type folding folder is suitable for parallel folding, bag folding, vertical folding, etc. It can fold 16 open, 32 open and 32 open double bookbinding. The four-fold folding machine can fold various printing papers of 40-120 g/m2, the pages of collapsible books and publications, the paper pages used for various blank paper products, maps, design drawings, and multi-fold inserts. Suitable for medium and small books and magazines printing and binding plants.