Brief Analysis of Controlling Points in Wireless Binding Process

Wireless glue does not use wire, do not use wire, but use glue to glue the book block, from the book to the automatically completed binding method. The process flow is roughly as follows: collation, feeding, milling, backing, top-side adhesive, letterback, bag cover, forming, glue cooling, duplex, slitting, cutting finished products, stacking light, inspection Finished products, bundled.

The finishing work before entering the plastic bag after the collation of books is a process that can not be ignored in the whole process of binding. If the book after collating fails to get into the plastic bag in the finishing process, it will cause many kinds of unsatisfactory quality problems such as loose-page, loose-leaf, empty ridge, and wrinkled ridge. Finishing is tying the semi-finished book stickers, putting a certain number of book stickers on the strapping machine, and using both ends to fasten the plates, starting the strapping machine, binding the loosened book stickers and binding them with string straps. In order to stiffen the compacted spine back, after compaction and binding, apply polyethylene glue on the back of the bound book. After the polyvinyl alcohol glue on the brush is dried, release the tie rope, and then Each branch is divided into plastic bags.

In glue binding, milling and backing are the key steps. The back of the milling depends on the thickness of the paper sheet and the number of layers to be folded. Generally, the thickness is 1.4mm to 3mm, and the depth of the hair is required to be 0.8mm to 1.5mm. If the depth of milling and backing is not enough, it will affect the penetration of the glue, which will result in the quality defects of page breaking and loosening. If the book is not affixed in the finishing process before the plastic bag, uneven binding, not compacted into the milling back, then the semi-finished product of this quality defect is bound to be uneven after the clamp in the plastic bag machine, milling The knife cannot be milled, and the depth of the back of the book is not enough. The quality defects such as non-permeability, off-page, and loose-leaf are inevitable. Therefore, if a page break or loose-leaf is found during the quality inspection after the plastic bag, whether the milling back or the roughening depth is appropriate or not should also be inspected for semi-finished products processing such as binding, bundling, and compaction of the plastic bag. Quality situation.

Glue binding on the spine and side, the hot melt adhesive used is also different, for example, the spine film model H-970T, the side of the film model with H-239T, the performance of the two are also different, The temperature of the hot melt is not the same. It is important that the quality of gluing and gluing is properly controlled. The high temperature of the fused glue will make the glutinous material too thin and the viscosity is insufficient. The high temperature of the fused material will make the glue thicker. Can not penetrate, flow, and some will be small particles attached to the ridge or lateral surface will wrinkle cover, empty ridge. It is worth mentioning that at present,

Different manufacturers of hot melt, its performance is not the same (we have this experience from the actual use), the temperature of the hot melt adhesive hot melt used in our factory, for example, some side glue temperature 120 °C, The spine adhesive has a hot melt temperature of 135°C, some have a side melt temperature of 180°C, and the spine glue has a heat of 200°C. Therefore, the use of materials in accordance with the performance, to master the appropriate process parameters in order to ensure the quality of glue. Under normal circumstances, after the glue is applied, the width of the side edge glue should be 4mm~5mm, and the spine glue can penetrate and fill the milling groove. When the glue is uneven, the glue is too thin, and the cover laminator pallet is not replaced as required (or the height is properly adjusted), the books after the lamination are prone to produce empty ridges and crumpled backs. This must be controlled and inspected during the plastic bag process.