IV. Preparation before rubber binding

1. After stacking the folded signatures: In the preparatory work for the binding of the books, no matter whether it is a straight plastic wrapper, or a combination of a circular wrapper and a glued production line, the folding quality of the signature will directly affect the forming of the book. The quality and operation of the complete machine will affect the book cycle and economic efficiency. From the situation of more than a dozen printing machines, the failures of over 50% of the machine's shutdown and neutral operation (including the linkage line equipped with a throwing device) are caused by non-standard folding and irregular stacking of signatures. Caused. In order to ensure the normal operation of the plastic wrapper, folded signature processing is the key link in glue production. The method is as follows: 180g or more of the four-folded pages are to be treated as a breach, and after the air in the signature is discharged, both ends of the signature are made of hardwood (the size of the wood is the same size as the signature) and the same length of the signature is formed by the binding machine. The bundles and signatures need to be bundled for more than 2 days. The dispatching time of the urgent signatures should not be less than 24 hours or must be flattened before collating. 2 After the collation of the book blocks used in the plastic packet machine, it must be used for bundling-placing-splitting process to ensure that the back of the book block is flat and the inside pages do not loose or fall. If the book is not accompanied by a paste, the loose copy is easy to be scattered or some stickers, page milling and backing are not in line with the standards, it is easy to page or loose. After the 3 folds of pages were bundled, some of the company's factory area was limited by the development of production. Only the signatures were bundled in the aisle and outdoor, and the books were bundled in the unheated warehouse in the winter. When the car was booked, the car was used. Shipped directly to the glue shop. Due to the large temperature difference between indoor and outdoor in winter, this will seriously affect the quality of the glue binding. When the glue is contacted with the book with the temperature difference, the surface of the back glue layer and the side glue layer drops instantaneously and shortens the hot melt adhesive. The solidification time and opening time, for the above problems to deal with and avoid the method is: the production arrangement, the winter at least one day ahead of the need to glue the book to be sent to the workshop and the same temperature of the workshop site stacking, for glue bookbinding Aging process, as much as possible to reduce the quality problems of the temperature difference between the signature and the workshop. 4 off pages, loose pages; page loss, loose paper is mainly related to folding. If the folding cover is too large and the page is not in position when the page is pinched, the air must be vented to avoid page breaks and page breaks (80g) or more, such as a fold or single page in the booklet. Good for sticky page processing, so that the problem of page dropping and loosening (removing the cause of the milling cutter) is solved.

2. Pre-work inspection of the plastic package machine: 1 Before the start-up of the domestic plastic package machine, it is necessary to pay attention to check the milling cutter pallets and milling cutters. According to the length of time the plastic bag is used, the sharpness of the milling cutter should be inspected on a regular basis, and the milling cutters that can't be milled out of the swarf should be replaced regularly; the pallets should be grounded to ensure the consistency of the pallet's working surface; The working team refuels at least two refueling points. 2 At the end of the work of each work class, it is necessary to clear the brush wiper and slotted knife in time to keep the guide surface clean. Careful maintenance and overhaul of the suction device and scraps discharge are normal, ensuring that the paper scraps are completely separated from the signature page during milling and backing. Paper scraps cannot be brought into the glue pan with the movement of the signature page. Instead, check the replacement pallets and milling cutters.