Stapling and finishing

(BINDING AND FINISHING) Stapling and finishing are the final processing stages of printing production. We call the processing of printed pages or webs into books, magazines, product catalogs, booklets, etc., and call for special treatment for product display, labeling, packaging, or other advertising. Decoration. The beautification of books, such as embossed embossments, patterns, extension stamps or other decorative treatments, is also included in the scope of finishing. Stapling and finishing can be done on the same device or on a dedicated machine. Some printers have online binding or finishing equipment, while others purchase specialized machines to complete this part of the work, while others simply complete the work of the company. Stapling and Finishing Preparation In order for the product to be printed successfully, the entire production process must be carefully planned and carefully handled. Prepress work (layout design, document or image layout, photographing, and board making, etc.) is closely related to printing and finishing (binding and finishing), and the success of the final stage of printing depends largely on the early stages of the production process. Careful planning. Before printing, the designer should understand the various aspects of the printing press, understand whether the printing product he designed is limited in the selection of paper and ink, how many colors can be used, what kind of binding and decoration the printed product needs, and whether the cover is Need to deal with and so on. In theory, the binding and finishing work should be considered within the overall scope of the design before the product is finalized. When imposition is in the imposition stage, the imposition staff must examine various imposition designs in detail and use spelling versions to help coordinate the various aspects of the imposition. He can splicing the components of the layout directly on a dedicated board to ensure that the folding is accurate. An official layout provided by the layout designer can display the overall layout design, and an imposition diagram drawn by the imposition or binding staff is used to specify the specific location settings of the printing image on a sheet layout, such as page order, page margins, Blanks, trimming edges, folding marks, cutting lines, etc. are all required to be checked and confirmed before they can be delivered for use. If you need to print on both sides, you must also ensure that the images on both sides of the paper are aligned with each other. The folded sample is a blank sheet of paper with a size equal to that of the printing press used. It is folded and marked with a page number to indicate the position of each page of pages in the entire layout. It marks two X's and one X's respectively, indicates the position of the grippers and the side gauges, and determines the singulation or bilateral cut margin per page. The binding sample and folding sample function are basically similar, but after the staple and edging process, to indicate the amount of paper edge trimming after binding and book back saddle shape, if the inner and outer pages need to be aligned, then the middle of the book How much book paper should be removed? Prior to imposition and platemaking, design information regarding printing and binding must be reflected in the print imposition. In lithography, there are a variety of standard print impositions available (eg, single-open, single-sided, single-sided, full-sheet, full-sheet, full-sheet, full-sheet, and front-to-back). These print impositions are sheet-fed printing designs, but they can also be used for web printing. Which type of imposition is chosen depends on the requirements of the printing product and the characteristics of the printing press used. For small presses, simple one-on-one, single-image, single-sided imposition, etc. are usually used. For large-scale printers, single-sided or double-entry impositions are used. Double-entry imposition is an imposition method that uses a continuous-shooting device to expose the same negative film on the same printing plate twice in succession to produce two identical images, and is mainly used for a large-sized printing press. A one-sided mixed imposition is a type of imposition where several different pages are mixed on the same plate, so it is sometimes referred to as a combined imposition. Full-length plate is the most common sheet-fed imposition method. It uses different film plates and printing plates and prints images on the front and back of a single sheet. When the printing material passes through the printing press, the printing machine prints a pattern on one side of the paper, and then the paper is turned over. The printing machine then prints a different pattern on the other side. This type of imposition also graphically illustrates the imposition of folding samples. When full-sheet copy-left imposition is used, all images to be printed on both sides of the paper are exposed on the same plate, and the images are arranged so that the paper passes through the same press twice and uses the same tooth and side guides. Regulations for double-sided alignment requirements. When full-sheet reversal imposition is used, all images on the front and back sides are also exposed on the same printing plate. However, unlike full-sheet reversal, the end of the first printing paper is fixed during the second printing. Place for mouth and side guides. The quality of printed paper products and the ability of printed products to meet the requirements for folding, binding, and finishing will depend in part on the characteristics of the paper or other substrates used. Its specification requirements should be fully explained at the planning stage, and its size is limited by the technical specifications of the sheet-fed or web presses used. Other issues to be considered include the maximum format size that can be accepted by a folding machine when printed sheets, web pages, and offline pages are folded. The reference weight of the paper and the texture of the paper or paper roll (fiber orientation) are two other issues to consider in the preparation phase. The paper's base weight is the weight of a 500-sheet paper cut to a standard size, which determines the number of folds per page. Because lighter weight paper allows more folds than heavy paper. In addition, the paper's grain direction should be parallel to the binding direction of the paper. Otherwise, near the back of the book, the paper tends to wrinkle and crack, and the pages of the paper will become too rigid and difficult to see. During printing, if the weight of the paper is taught, the operator is likely to increase the printing effect so that the grain direction of the paper follows the axial direction of the printing roller, but in this way, the printed product may be in conflict with the binding requirement. Folding endurance, that is, the number of times that the paper can withstand repeated folding without tearing due to tension, is another factor that must be considered when printing a finished product. Different paper folding endurance varies greatly, but in general, the paper folding endurance is stronger when the folds cross the texture direction. Folding endurance is a good indicator of paper durability. The trimmer Guillotine trimmer is used for trimming of blank paper before printing, or of printed bound paper. At present, there are many models and sizes of paper cutters to choose from, but they are basically similar in structure and consist of several components, namely cutters, cutting rods, cutting tables, side gauges, back gauges and Paper holder and so on. The cutter of the paper trimmer is long and heavy. It is in front of the machine and is fixed on a bar. When it moves down toward the base, the paper basket is cut open. The angle of the blade depends on the nature of the material being cut. There are cutters for different hardness materials to choose from. The cutter bar is another important part of the trimmer. It is inserted into a slot in the cutting table directly below the cutter. If there is no cutting bar, the cutter will collide with the metal cutting table every time the cutter cuts the paper basket, and the cutter can easily become blunt or even broken. The function of the side gauge and the back gauge is to adjust the position of the paper stack before cutting, and accurately position the paper basket under the cutter. The side gauges are stationary, and the back gauges can be moved and can be adjusted to different cutting lengths. If there is more than one part of the back baffle, we call this back bail a loose baffle. The paper cutter holder is a metal bar parallel to the cutter and 90° to the cutting station. It has two functions, one is to discharge the air in the paper basket before cutting, and the other is to fix the paper basket firmly in place during the cutting process. Auxiliary equipment The automatic paper transport system is one of the most common additions to the paper cutter. It promotes advances in ergonomics and also increases productivity. A paper crepe machine may be processed online with a paper cutter, or it may be combined offline with a folding paper machine to loosen the paper before folding, or it may be used in a printing shop to load the printed paper. Upper slide, transported to the bookbinding shop. The function of this device in connection with the trimmer is to squeeze out the air from the paper before cutting and to loosen the paper to align the paper along the sides of the cutter. The function of the lifting table is to identify the height of the paper basket by the sensor, hold the paper basket of the paper cutter at a certain height, and after the paper basket is cut, remove it from the paper cutting machine to the pneumatic table on the other side of the machine. And re-stack on the slide. The vertical stacking system uses pneumatic plates to lift the paper stack and can simultaneously lift five to ten stacks, while the horizontal stacking system, which covers the same size, can only transport one stack at a time.