The vacuum conversion system can greatly reduce noise pollution and improve the working environment of the workshop. The automatic alarm system can automatically detect abnormal conditions during production and stop the machine, reduce the scrap rate, reduce the cost of printing enterprises, and improve the product yield. The maximum production speed is 55pcs/min, and the general production speed is about 50pcs, which is 1.5 to 2.5 times the speed of the ordinary leather machine. The soft ridge paper device can produce soft ridge products such as round ridge hardcover, which greatly increases the business scope of the printing company and improves the profit of the printing company. Timing automatic pre-melting function, melt glue in advance, shorten production preparation time. Cone pin positioning, accurate positioning, prolong machine life, reduce maintenance costs, and improve the profit of printing enterprises.