There are many kinds of paper contacted by binding, and the quantity and thickness are different. The paper quantity of common book block (or this core) is 40g / ㎡ to 90g / ㎡. The process methods used are as follows:

Improvement Of Process Quality In Paper And Binding Processing

      When the paper weight is about 40g / ㎡, the automatic platform pneumatic paper feeding type, fence type and high-speed folding machine are generally not used for bookbinding processing, but the ring wrapping paper feeding type and knife type folding machine are used for folding, Improvement Of Process Quality In Paper And Binding Processing

      because the 40g / ㎡ paper is thin and soft, so it is not suitable for fast folding. The number of folds is mostly 3-4. The number of folds is small and the book is thin and soft, which is unfavorable to the next process.Improvement Of Process Quality In Paper And Binding Processing

     When the sewing machine locks the thread, the cross lock is generally used. The cross lock line is twice less than the flat lock, which can reduce the back height of the book and make the book smooth after processing.Improvement Of Process Quality In Paper And Binding Processing

② About 50g / ㎡ paper is generally news and letterpress paper. This kind of quantitative paper has the most contact and is easy to process. Compared with other papers, this paper is neither soft nor hard after being pasted. Improvement Of Process Quality In Paper And Binding Processing

     Any kind of binding equipment can be used. The process processing is not subject to any restrictions. In hardcover, its book block can be processed for various shapes.Improvement Of Process Quality In Paper And Binding Processing

③ Paper above 70g / ㎡ is generally offset and coated paper. These two kinds of paper belong to high-grade paper, with large quantity, large thickness, smooth, easy to move wrong, and difficult binding. Improvement Of Process Quality In Paper And Binding Processing

     In recent years, due to the increasing number of high-end books and periodicals, a large number of copper plate and offset paper with large quantity are used, and the weight of a book is often more than twice that of a relief paper with the same thickness, which objectively increases the labor intensity for binding workers.Improvement Of Process Quality In Paper And Binding Processing.

      Because this kind of paper is very neat, it is very suitable to fold by machine, but the number of folds should not be too many. At most, only three folds can be folded, and the effect of two folds is the best (set stickers can be used to reduce the matching number and binding times).Improvement Of Process Quality In Paper And Binding Processing

     If the number of folds is too many, the book stickers are easy to fold unevenly or the error is too large, resulting in irregular books and periodicals, and it is not easy to make the shape of the back of the book in finishing processing (the round back is easy to be trapezoidal,.

     And the ridge is easy to be folded and broken) .Improvement Of Process Quality In Paper And Binding Processing.Improvement Of Process Quality In Paper And Binding Processing.

     The binder used for binding such books and periodicals should be appropriate, not only to avoid glue leakage, but also to pay attention to firm bonding.Improvement Of Process Quality In Paper And Binding Processing.

      The thickness of books and periodicals bound with this material is basically the same and the error is small. As long as the process is reasonable, other quality problems will not be caused by uneven thickness.Improvement Of Process Quality In Paper And Binding Processing.