Process key points in the hottest wireless binding

Key points in the process of wireless binding

wireless binding does not use iron wire or thread, but uses glue to bond the book block, from publishing to automatic binding. The process flow is roughly as follows: the back of the matching page is milled, the upper side is glued, the back is glued, the cover is wrapped, the forming glue is cooled, the double cutting is cut, the finished product is stacked, the finished product is polished, and the finished product is bundled. The finishing work before entering the plastic bag after the book is matched with pages is a process that cannot be ignored in the whole process of wireless binding. If the book after the page is not finished in the finishing process, it will enter the plastic bag, then the page will fall off, loose pages, empty ridges, wrinkles, etc. after the plastic bag, and most of the experimenters lack the maintenance and protection of the instrument and experience various bad quality problems. Finishing is to bind the semi-finished Book stickers, put a certain number of book stickers on the binding machine, block the two ends with plates quickly, start the binding machine, compact the loose Book stickers, and then bind them with ropes. In order to make the compacted spine stiff and solid, after compaction and binding, use polyethylene glue to paint the bound book back once. After the polyvinyl alcohol glue is dry, loosen the binding rope, and then separate each book and transfer it to the glue bag

back milling and roughening are the key processes in wireless binding. The milling back should be determined according to the thickness of the paper and the number of converted layers. Generally, 1.4mm ~ 3mm should be milled, and the roughening depth should be 0.8mm ~ 1.5mm. If the depth of milling and roughening is not enough, it will inevitably affect the penetration of glue, resulting in the quality defects of off page and loose page. If the book stickers are not aligned, bundled unevenly, or compacted in the finishing process before gluing, then the semi-finished products with such quality defects must have uneven back after being clamped by the book clip in the gluing machine. The milling cutter cannot mill the back, and the roughening depth of the back is not enough. The quality defects of glue impermeability, page separation, and loose pages mentioned above must exist. Therefore, in the quality inspection after the rubber bag, if page falling and loose pages are found, while checking whether the milling back and roughening depth are appropriate, it is also necessary to check the processing quality of semi-finished products with a minimum cost of 1700 yuan/cubic meter of polyurethane exterior wall insulation materials produced by the matching, binding, compaction and other processes entering the rubber bag

the binding part is on the spine and the side, and the hot-melt adhesive used is also different. For example, the film type used for the spine should pay special attention to the waterproof and moisture-proof number of h-970t, and the film type used for the side has h-239t. The performance of the two is also different, and the hot-melt temperature is different. It is important to master the appropriate or not for the quality of binding and binding. The high temperature of the melt adhesive will make the melt adhesive too thin and insufficient viscosity, High melt temperature will make the glue too thick and unable to penetrate and flow. 2. The operation method of friction and wear testing machine, and some will be attached to the ridge surface or side surface as small particles, which will make the cover wrinkle and empty ridge. It is worth mentioning that at present, the properties of hot-melt adhesives produced by different manufacturers are also different (we have such experience from actual use). Taking the hot-melt temperature of hot-melt adhesives used in our factory as an example, some side adhesives have a temperature of 120 ℃, the hot-melt temperature of spine adhesives is 135 ℃, and some side adhesives have a hot-melt temperature of 180 ℃, and the hot-melt temperature of spine adhesives is 200 ℃. Therefore, in order to ensure the gluing quality, we should master the appropriate process parameters according to the performance of the material. Generally, after gluing, the width of the side glue cover should be 4mm~5mm, and the spine glue can penetrate and fill the milling ditch. When the gluing is uneven, the gluing is too thin, and the support plate of the cover laminating machine is not replaced as required (or the height position is adjusted appropriately), the books after gluing are prone to empty ridges and wrinkles. This is what must be controlled and checked in the process of rubber coating