Views: 84 Author: Site Editor Publish Time: 2021-06-15 Origin: Site
Milling and polishing is one of the important steps of perfect binding. The book core page is milled and polished into a single page with a high-speed rotating milling cutter, and then the adhesive is penetrated into each book page to make the book stick firmly Of a process. To complete this process, we need to start from three aspects.
The milling cutter is an important tool for milling and polishing, and its quality directly affects the quality of the perfect binding book, so the choice of milling blade is the most important. There are two types of milling cutters on the cutter head of the wireless glue binding machine: movable cutters and fixed cutters. Whether it is a movable cutter or a fixed cutter, the material of the edge of the milling blade is very important.
There are two types of milling blades used for perfect binding on the market: one is ordinary blades with high-carbon steel at the knife edge; the other is alloy blades with cemented carbide at the knife edge. The carbon content of high carbon steel is 0.6% to 1.2%, and the cemented carbide is an alloy material made of the hard compound of refractory metal and metal through powder metallurgy process, which has high hardness, wear resistance, strength and A series of excellent properties such as good toughness, heat resistance and corrosion resistance.
Although the price of ordinary blades is relatively cheap, the hardness, sharpness, high temperature resistance and wear resistance of the blades are far from those of alloy blades, so milling blades It is best to choose an alloy blade with better hardness.
Generally newer perfect binding machines, the best gap between the movable knife and the fixed knife is 0.05mm. For the milling cutter, in addition to the good milling state and low milling resistance, the blade wear is also small, and the milling When the back is polished, the book back has a high flatness, which is conducive to the penetration of the adhesive and can improve the quality of the book binding.
If the milling and polishing depth is not enough, the innermost page will not be punched, which will affect the penetration of the adhesive, and the peeling and gluing will become inevitable. Generally speaking, the milling and polishing of tri-folding books should be 1~1.5mm. For books with too many folding pages or overprints, the milling and polishing depth must be increased to 2~3mm, otherwise it will be difficult to punch through.
Of course, the milling and polishing depth is not as large as possible. It should be operated according to the thickness of the signature. If it is too large, the format size will become smaller. At this time, if it is still cut according to the standard size, the page shrinkage will inevitably occur.
The above is the relevant content of the automatic wireless glue binding machine. I hope it will be helpful to you.