The drying of the book spine pressure groove means drying the adhesive sticking to the book case under the application of pressure. A series of pressure plates and thermoformed plates hold down the books that are glued to the book shell to make them stick together. These pressure plates and thermoforming plates will clamp the books under great pressure and dry them for a while before they can be released. Depending on the degree of dryness, a book may require five or more sets of pressure plates and thermoformed plates to complete the task.
The high-efficiency book-hanging machine will combine all the processes, including rounding, ridge lifting, sticking the book case, pressing groove drying and book case-making, etc., to form a mechanized production line.
Classification of book case binding. Book binding can be divided into three categories: large hardcover, small hardcover, and library binding. This classification is based on the number and nature of the binding. Most hardcover books belong to the scope of large hardcover.
Large hardcover refers to a larger amount of hard leather binding method. Because this kind of binding method mostly uses automatic or semi-automatic binding equipment, the number of its operations is generally not less than 1500.
Small hardcover refers to a small amount of hard leather binding method. It is mainly used by hand, and is also used for books that cannot be bound by a machine, such as the Bible wrapped in soft leather.
Library binding is a special binding method commonly used in libraries. It includes pre-binding, renewal, and general repair work. The library binding machine is similar to the small hardcover machine, which can be used to process a small amount of binding jobs and requires more manual operations. The main purpose of this kind of binding is to improve the wear resistance of commonly used books in public libraries.
Online finishing
Online finishing can be used as a part of the web printing process, instead of post-press processing procedures, to do some processing work on printed products. It includes labeling, folding, die cutting and other processes. Cover embossing and embossing can be completed in online finishing, or as an independent process.
Offset presses for printing publications and books often use compound folding machines to cut and fold paper into signatures, which is convenient for future binding work. Some other special accessory equipment, such as pre-folding machine and plow-shaped folding machine, can also be connected with online processing equipment to improve work efficiency. Online finishing is different from post-press independent finishing, which combines several steps of post-press processing.
Special Process
Point-of-sale posters, stationery, menus, and greeting cards all require special finishing techniques. This article will discuss finishing techniques related to processes such as embossing, foil stamping, and die cutting. These processes can be included in the post-press processing system, can also be used online finishing system, etc., can also be used alone.
Emboss relief. Embossing is to use the mold to press out the raised graphics. This method is also used for embossing, but the graphics and text are not decorated with aluminum foil or ink. The embossing is to use the mold to press out the concave and text on the paper.
The embossing machine is composed of an embossing machine, a temperature-controlled embossing plate and a convex stamping die installed on it. On the opposite embossing plate, there is another mold corresponding to the stamping die installed there. The stamped printing material is also loaded in this platen. During the embossing, when the platen is in contact with the press and begins to pressurize the printing material, marks will be produced. In the pressure relief process, although cold molds can also be used for indentation, hot molds are more common.
Press gold foil. Pressing gold foil refers to the whole process of stamping the printed base material passing through the heated mold and the gold foil transferred from the feed roller with a stamping machine. When the machine presses, the gold foil is pressed against the printed substrate. If flat pressing is used, there will be no indentation on the gold foil on the substrate. Gold foil embossing pattern is a technology that combines the above-mentioned embossing process and gold foil process. Book covers, cosmetic packaging boxes and greeting cards are three products that often use gold foil and gold foil patterning techniques.
Die cutting. Embossing and gold foiling are often performed immediately before or after the die cutting process. If the corresponding accessory equipment is installed on the die cutting machine, the embossing pattern and gold foil may also become part of the die cutting process. Products that need to be die cut include labels, cartons, popular books, and point-of-sale posters.
Steel rule die cutting is a common die cutting process, which integrates die cutting, indentation and embossing into one, and can perform automatic die cutting one by one or a group (two or more in each group).
There are two types of die-cutting machine: pressure plate type and drum type. The working principle of the platen die cutting machine is the same as that of the aforementioned embossing machine. One embossing disc carries die cutting and embossing dies, and the other embossing disc carries supporting molds. When the two embossing discs are pressed together, the die cutting and embossing work is completed. On the reciprocating platen die cutting machine, the position of one platen is fixed, and the other can move towards it. Both stamping discs of the claw die cutting machine can move. When the two stamping discs coincide, the die cutting and embossing begin. The platen-type die-cutting machine can complete 9,000 stampings per hour.
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