Hardcover book processing has always been a binding technology that the industry is concerned about, and hardcover book covers are the top priority. Nanjing Aide Printing Co., Ltd. is famous for producing luxury hardcover books. Below, please ask Liu Junmin, a teacher of Nanjing Aide Printing Co., Ltd., who has experience in hardcover production, to take you into the world of hardcover book covers.
The importance of craft sample book making
The perfect work, the design is first. A beautifully framed book with an exact match between the book block and the book case is a must. Book core production Before the book shell is made, the more standardized the book block size is made, the more accurate the book case size will be. Usually, the customer's requirements must be taken as the premise of the process design, such as European orders and domestic orders, which have great differences in the roundness and the size of the floating mouth required by the hardcover book.
We must emphasize the necessity and importance of craft sample making, because on the one hand it is the true embodiment of the process design and results, so that customers can see their works in the fastest time, on the other hand, they can make some problems as much as possible. Early exposure to mass production allowed problems to be resolved early.
Book material selection
According to the manner of the fabric wrapped on the book case, it can be divided into a whole book cover (the cover is a whole piece of material) and a cover book cover (the cover surface is two or more materials); Leather book case, plastic book case, cloth book case, PVC coated face book case, paper book case and film face book case; etc.; the lining material can be divided into: hard seal, semi-hard seal And soft seals, as well as luxury leather zip closures; from the wrap angle can be divided into rounded corners and square corners.
For the processing of the above various styles and different material book cases, the production requirements and processing methods are also different.
For example, in the processing of the leather book case, due to its high price and irregular shape of the raw material, the mold should be used as much as possible to die-cut, so that it is economical and does not cause indentation on the relatively soft leather surface. Since the leather book case has high strength and good elasticity, the rubber used in the production is preferably cold glue, which helps to keep the leather surface soft and hard, so that it has a good hand feeling. The leather case must be thinned before wrapping and wrapping to avoid overlapping ridges. It is much easier to make artificial leather bookcases, but it is best to use cold glue.
As far as possible, the surface of the cloth, the PVC coated surface and the paper cover are made to make the surface of the coated paper parallel to the back of the book. This is beneficial to the sizing of the surface of the package and the groove of the three-grit groove. Forming, and the cover can be easily damaged by force when it is pressed.
Making of the book cover
The production of the cover book shell is usually done by human and machine cooperation. First, the paste shell machine pastes the middle diameter portion of the book case, and then presses a 3~5mm wide groove line with the set mold at the overlap of the joint surface according to the joint position of the cover, and finally passes the manual before and after. The cover is pasted on the line, so that the position of the cover is accurate and not skewed, and the overlap of the two layers of the cover material at the joint is avoided.
When pasting a printed cover book case, it is recommended to add a width of 1 to 2 mm and a height of 3 to the edge of the cover or the foot of the cover when making the cover plate. The 4mm color block is used to judge whether the cover position is accurate when cutting and shelling.
Soft seal production
Soft seals mainly refer to book covers made directly from PVC film or non-printing. After the PVC film is produced and processed from the manufacturing plant, it is generally sent to the printing factory in the form of a reel. Due to the characteristics of the PVC film itself, the expansion and contraction variable is large, especially along the direction of the reel. In addition, different temperature differences will directly affect its expansion and contraction, so there should be an effective method for cutting, placing, releasing variables, processing and so on.
Firstly, according to the principle of the cover silk, cut into flat sheets and put them on a multi-layer mesh drying rack (50 sheets per layer is suitable), then put them in a drying room at 40-50 °C for about 12 hours. Store at room temperature for 24 hours to release the variables, then cut the small material, and finally enter the next process. The cover thus treated will eventually have no dimensional expansion and contraction, so that the processing quality of the subsequent process is ensured.
The size of the book case should be correct.
The way the code is placed is determined by the nature of the cover material. The cover material that is not easily damaged can be stacked, but the better method is to place the book cover vertically or to place the code in front and back, so as to avoid the indentation and glue on the edge of the book cover and the corner of the corner. At the same time, the vertical stacking can also make the book shell with fast reordering dry soon.
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